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142-498: The Knaben uplands ( Knabeheiene ) are mainly located at an elevation of between 750 and 850 metres (2,460 and 2,790 ft) above sea level. The area has a rich bird-life and animal life, with moose , reindeer , black grouse , lagopus , falcon , and eagle . Occurrence of molybdenite was the basis for the mining activities at Knaben. In 1897, it was determined that tempering of steel with molybdenum resulted in an alloy with qualities favourable for weapon production. In 1902,

284-480: A browser , the moose's diet consists of both terrestrial and aquatic vegetation, depending on the season, with branches, twigs and dead wood making up a large portion of their winter diet. Predators of moose include wolves , bears , humans , wolverines (rarely, though may take calves), and (rarely, if swimming in the ocean) orcas . Unlike most other deer species, moose do not form herds and are solitary animals , aside from calves who remain with their mother until

426-529: A dewlap or bell, which is a fold of skin under the chin. Its exact function is unknown, but some morphologic analyses suggest a cooling (thermoregulatory) function. Other theories include a fitness signal in mating, as a visual and olfactory signal, or as a dominance signal by males, as are the antlers. The moose is a browsing herbivore and is capable of consuming many types of plant or fruit. The average adult moose needs to consume 96 megajoules (23,000 kilocalories) per day to maintain its body weight. Much of

568-409: A 'velvet' texture." This requires intense grazing on a highly-nutritious diet. By September the velvet is removed by rubbing and thrashing which changes the colour of the antlers. Immature bulls may not shed their antlers for the winter, but retain them until the following spring. Birds, carnivores and rodents eat dropped antlers as they are full of protein and moose themselves will eat antler velvet for

710-581: A bull that reportedly scaled 1,180 kg (2,601 lb), but none are authenticated and some may not be considered reliable. Bull moose have antlers like other members of the deer family. The size and growth rate of antlers is determined by diet and age. Size and symmetry in the number of antler points signals bull moose health and cows may select mates based on antler size and symmetry. Bull moose use their antlers to display dominance, to discourage competition, and to spar or fight rivals. The male's antlers grow as cylindrical beams projecting on each side of

852-506: A completely different species of deer, Cervus canadensis , also called the wapiti (from Algonquin ). A mature male moose is called a bull, a mature female a cow, and an immature moose of either sex a calf. In Classical Antiquity , the animal was known as ἄλκη álkē in Greek and alces in Latin , words probably borrowed from a Germanic language or another language of northern Europe. By

994-461: A distinctive appearance similar to coral. Like roe deer , moose are more likely to develop perukes, rather than cactus antlers, than the more developed cervine deer, but unlike roe deer, moose do not suffer fatal decalcification of the skull as a result of peruke growth, but rather can support their continued growth until they become too large to be fully supplied with blood. The distinctive-looking perukes (often referred to as "devil's antlers") are

1136-412: A fire regime to burn an area equivalent to the total area of an ecosystem is its fire rotation (Heinselman 1973) or fire cycle (Van Wagner 1978). However, as Heinselman (1981) noted, each physiographic site tends to have its own return interval, so that some areas are skipped for long periods, while others might burn two-times or more often during a nominal fire rotation. The dominant fire regime in

1278-562: A moose being scavenged by a Greenland shark ( Somniosus microcephalus ). In some areas, moose are the primary source of food for wolves. Moose usually flee upon detecting wolves. Wolves usually follow moose at a distance of 100 to 400 meters (300 to 1,300 ft), occasionally at a distance of two to three kilometers (1 to 2 mi). Attacks from wolves against young moose may last seconds, though sometimes they can be drawn out for days with adults. Sometimes, wolves will chase moose into shallow streams or onto frozen rivers, where their mobility

1420-472: A moose's energy is derived from terrestrial vegetation, mainly consisting of forbs and other non-grasses, and fresh shoots from trees such as willow and birch . As these terrestrial plants are rather low in sodium , as much as half of its diet usually consists of aquatic plants, including lilies and pondweed , which while lower in energy content, provide the moose with its sodium requirements. In winter, moose are often drawn to roadways, to lick salt that

1562-567: A natural defense, such as liver flukes , brain worms and winter tick infestations. Predation of moose calves by brown bear is also significant. Landscape change from salvage logging of forest damage caused by the mountain pine beetle has resulted in greater foraging in logged areas by female moose, and this is the lead hypothesis as to why the moose population is declining in eastern North American forests, as this likely leads to increased predation. An alternate hypotheses among biologists for generalized, nonhunting declines in moose populations at

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1704-454: A number of adaptations specifically for survival in harsh taiga winters, although larch, which is extremely cold-tolerant, is deciduous . Taiga trees tend to have shallow roots to take advantage of the thin soils, while many of them seasonally alter their biochemistry to make them more resistant to freezing, called "hardening". The narrow conical shape of northern conifers, and their downward-drooping limbs, also help them shed snow. Because

1846-548: A pack of gray wolves ( Canis lupus ) can still pose a threat, especially to females with calves. Brown bears ( Ursus arctos ) are also known to prey on moose of various sizes and are the only predator besides the wolf to attack moose both in Eurasia and North America. In Western Russia, moose provide about 15% annual estimated dietary energy content for brown bears and are the most important food source for these predators during spring. However, Brown bears are more likely to scavenge

1988-484: A patch of sun; mosses and lichens thrive on the damp ground and on the sides of tree trunks. In comparison with other biomes, however, the taiga has low botanical diversity. Coniferous trees are the dominant plants of the taiga biome. Very few species, in four main genera, are found: the evergreen spruce, fir and pine, and the deciduous larch. In North America, one or two species of fir, and one or two species of spruce, are dominant. Across Scandinavia and western Russia,

2130-550: A polar species, some southern herds of muskoxen reside in the taiga of Russia's Far East and North America. The Amur -Kamchatka region of far eastern Russia also supports the snow sheep , the Russian relative of the American bighorn sheep , wild boar , and long-tailed goral . The largest animal in the taiga is the wood bison of northern Canada/Alaska; additionally, some numbers of the American plains bison have been introduced into

2272-457: A predator. However, like all ungulates known to attack predators, the more aggressive individuals are always darker in color, with the darkest coloring usually in areas facing the opponent, thus serving as a natural warning to other animals. Moose require habitat with adequate edible plants (e.g., pond grasses, young trees and shrubs), cover from predators, and protection from extremely hot or cold weather. Moose travel among different habitats with

2414-433: A problem. Moose prefer sub-alpine shrublands in early winter, while bison prefer wet sedge valley meadowlands in early winter. In late winter, moose prefer river valleys with deciduous forest cover or alpine terrain above the tree line, while bison preferred wet sedge meadowlands or sunny southern grassy slopes. After expanding for most of the 20th century, the moose population of North America has been in steep decline since

2556-408: A relatively small variety of highly specialized and adapted animals, due to the harshness of the climate. Canada's boreal forest includes 85 species of mammals , 130 species of fish, and an estimated 32,000 species of insects . Insects play a critical role as pollinators , decomposers , and as a part of the food web. Many nesting birds, rodents, and small carnivorous mammals rely on them for food in

2698-442: A study of trophy antlers using a microphone found that the palmate antler acts as a parabolic reflector, amplifying sound at the moose's ear. The antlers of mature Alaskan adult bull moose (5 to 12 years old) have a normal maximum spread greater than 200 centimeters (79 in). By the age of 13, moose antlers decline in size and symmetry. The widest spread recorded was 210 centimeters (83 in) across. An Alaskan moose also holds

2840-412: A warmer climate. The mature boreal forest pattern in the south shows balsam fir dominant on well-drained sites in eastern Canada changing centrally and westward to a prominence of white spruce , with black spruce and tamarack forming the forests on peats, and with jack pine usually present on dry sites except in the extreme east, where it is absent. The effects of fires are inextricably woven into

2982-452: A wolf kill or to take young moose than to hunt adult moose on their own. Black bears ( Ursus americanus ) and cougars ( Puma concolor ) can be significant predators of moose calves in May and June and can, in rare instances, prey on adults (mainly cows rather than the larger bulls). Wolverines ( Gulo gulo ) are most likely to eat moose as carrion but have killed moose, including adults, when

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3124-541: Is 2.4–3.1 m (7 ft 10 in – 10 ft 2 in), with the vestigial tail adding only a further 5–12 cm (2– 4 + 1 ⁄ 2  in). The largest of all the races is the Alaskan subspecies ( A. a. gigas ), which can stand over 2.1 m (6 ft 11 in) at the shoulder, has a span across the antlers of 1.8 m (5 ft 11 in) and averages 634.5 kg (1,399 lb) in males and 478 kg (1,054 lb) in females. Typically, however,

3266-535: Is a biome characterized by coniferous forests consisting mostly of pines , spruces , and larches . The taiga or boreal forest is the world's largest land biome . In North America, it covers most of inland Canada , Alaska , and parts of the northern contiguous United States. In Eurasia , it covers most of Sweden , Finland , much of Russia from Karelia in the west to the Pacific Ocean (including much of Siberia ), much of Norway and Estonia , some of

3408-501: Is about twice that of the caribou. Moose skin is typical of the deer family . Moose fur consists of four types of hair: eyelashes , whiskers , guard hairs and wool hairs. Hair length and hair density varies according to season, age, and body region. The coat has two layers—a top layer of long guard hairs and a soft wooly undercoat. The guard hairs are hollow and filled with air for better insulation, which also helps them stay afloat when swimming. Both male and female moose have

3550-476: Is an important cause of moose morbidity and mortality and also contributes to vulnerability to predators. Ectoparasites of moose include the moose nose bot fly , and winter ticks . Endoparasites of moose include dog tapeworm , meningeal worm , lungworm, and roundworm. Moose are mostly diurnal . They are generally solitary with the strongest bonds between mother and calf. Although moose rarely gather in groups, there may be several in close proximity during

3692-472: Is associated with the Norrland terrain . After the permanent ice caps and tundra , taiga is the terrestrial biome with the lowest annual average temperatures, with mean annual temperature generally varying from −5 to 5 °C (23 to 41 °F). Extreme winter minimums in the northern taiga are typically lower than those of the tundra. There are taiga areas of eastern Siberia and interior Alaska- Yukon where

3834-421: Is browsing aquatic vegetation. The moose proboscis likely evolved as an adaptation to aquatic browsing, with loss of the rhinarium , and development of a superior olfactory column separate from an inferior respiratory column. This separation contributes to the moose's keen sense of smell, which they employ to detect water sources, to find food under snow, and to detect mates or predators. As with all members of

3976-555: Is found in areas with mean annual temperature below freezing, whilst in the Dfd and Dwd climate zones continuous permafrost occurs and restricts growth to very shallow-rooted trees like Siberian larch . The growing season , when the vegetation in the taiga comes alive, is usually slightly longer than the climatic definition of summer as the plants of the boreal biome have a lower temperature threshold to trigger growth than other plants. Some sources claim 130 days growing season as typical for

4118-409: Is found in the smaller areas with oceanic influences; in coastal areas of Scandinavia and Finland, the growing season of the closed boreal forest can be 145–180 days. The shortest growing season is found at the northern taiga–tundra ecotone , where the northern taiga forest no longer can grow and the tundra dominates the landscape when the growing season is down to 50–70 days, and the 24-hr average of

4260-427: Is further evidence pointing to a long and intimate association with fire. Seven of the ten most common trees in the boreal forest— jack pine , lodgepole pine , aspen , balsam poplar ( Populus balsamifera ), paper birch , tamarack , black spruce – can be classed as pioneers in their adaptations for rapid invasion of open areas. White spruce shows some pioneering abilities, too, but is less able than black spruce and

4402-492: Is greatly impeded. Moose will sometimes stand their ground and defend themselves by charging at the wolves or lashing out at them with their powerful hooves. Wolves typically kill moose by tearing at their haunches and perineum , causing massive blood loss . Occasionally, a wolf may immobilize a moose by biting its sensitive nose, the pain of which can paralyze a moose. Wolf packs primarily target calves and elderly animals, but can and will take healthy, adult moose. Moose between

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4544-554: Is home to many types of berries . Some species are confined to the southern and middle closed-boreal forest (such as wild strawberry and partridgeberry ); others grow in most areas of the taiga (such as cranberry and cloudberry ). Some berries can grow in both the taiga and the lower arctic (southern regions) tundra, such as bilberry , bunchberry and lingonberry . The forests of the taiga are largely coniferous , dominated by larch , spruce , fir and pine . The woodland mix varies according to geography and climate; for example,

4686-531: Is more than 30 centimetres (1 ft) higher than the next-largest deer on average, the wapiti . The tail is short (6 cm to 8 cm in length) and vestigial in appearance; unlike other ungulates the moose tail is too short to swish away insects. Males (or "bulls") normally weigh from 380 to 700 kg (838 to 1,543 lb) and females (or "cows") typically weigh 200 to 490 kg (441 to 1,080 lb), depending on racial or clinal as well as individual age or nutritional variations. The head-and-body length

4828-416: Is not a limiting factor, the ground freezes during the winter months and plant roots are unable to absorb water, so desiccation can be a severe problem in late winter for evergreens. Although the taiga is dominated by coniferous forests, some broadleaf trees also occur, including birch , aspen , willow , and rowan . Many smaller herbaceous plants, such as ferns and occasionally ramps grow closer to

4970-520: Is not exclusively an alpine biome, and unlike subalpine forest , much of taiga is lowlands. The term "taiga" is not used consistently by all cultures. In the English language, "boreal forest" is used in the United States and Canada in referring to more southerly regions, while "taiga" is used to describe the more northern, barren areas approaching the tree line and the tundra . Hoffman (1958) discusses

5112-450: Is still growing or able to grow, since testosterone is needed to stop antler growth; they may take one of two forms. "Cactus antlers" or velericorn antlers usually retain the approximate shape of a normal moose's antlers but have numerous pearl-shaped exostoses on their surface; being made of living bone, they are easily broken but can grow back. Perukes ( US : / p ə ˈ r uː k s / ) are constantly growing, tumor-like antlers with

5254-554: Is the world's tallest, largest and heaviest extant species of deer and the only species in the genus Alces . It is also the tallest, and the second-largest, land animal in North America , falling short only of the American bison in body mass. Most adult male moose have broad, palmate ("open-hand shaped") antlers ; other members of the deer family have pointed antlers with a dendritic ("twig-like") configuration. Moose inhabit

5396-448: Is used as a snow and ice melter. A typical moose, weighing 360 kg (794 lb), can eat up to 32 kg (71 lb) of food per day. Moose lack upper front teeth , but have eight sharp incisors on the lower jaw. They also have a tough tongue, lips and gums, which aid in the eating of woody vegetation. Moose have six pairs of large, flat molars and, ahead of those, six pairs of premolars, to grind up their food. A moose's upper lip

5538-422: Is usually the first sign of aggression, while laid-back ears or a lowered head is a sign of agitation. When the hairs on the back of the moose's neck and shoulders ( hackles ) stand up, a charge is usually imminent. The Anchorage Visitor Centers warn tourists that "...a moose with its hackles raised is a thing to fear." Moose cows are more likely to emit protest moans when courted by small males. This attracts

5680-431: Is very sensitive, to help distinguish between fresh shoots and harder twigs, and is prehensile , for grasping their food. In the summer, moose may use this prehensile lip for grabbing branches and pulling, stripping the entire branch of leaves in a single mouthful, or for pulling forbs , like dandelions , or aquatic plants up by the base, roots and all. A moose's diet often depends on its location, but they seem to prefer

5822-543: The Bering land bridge , a number of animal and plant species , more animals than plants, were able to colonize both land masses, and are globally-distributed throughout the taiga biome (see Circumboreal Region ). Others differ regionally, typically with each genus having several distinct species, each occupying different regions of the taiga. Taigas also have some small-leaved deciduous trees, like birch , alder , willow , and poplar . These grow mostly in areas further south of

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5964-610: The Canadian Maritimes and Quebec . South of the Canada–US border, Maine has most of the population with a 2012 headcount of about 76,000 moose. Dispersals from Maine over the years have resulted in healthy, growing populations each in Vermont and New Hampshire , notably near bodies of water and as high up as 910 m (3,000 ft) above sea level in the mountains. In Massachusetts , moose had gone extinct by 1870, but re-colonized

6106-1020: The Caucasus . It is listed under Appendix III of the Bern Convention. In 2008, two moose were reintroduced into the Scottish Highlands in Alladale Wilderness Reserve . The moose disappeared as a breeding species from Denmark about 4,500 years ago (in the last century, a very small number have lived for periods in Zealand without establishing a population after swimming across the Øresund from Sweden), but in 2016-17 ten were introduced to Lille Vildmose from Sweden. In 2020, this population had increased to about 25 animals. Boreal forest Taiga or tayga ( / ˈ t aɪ ɡ ə / TY -gə ; Russian : тайга́ , IPA: [tɐjˈɡa] ), also known as boreal forest or snow forest ,

6248-668: The Eastern Canadian forests ecoregion (of the higher elevations of the Laurentian Mountains and the northern Appalachian Mountains ) in Canada is dominated by balsam fir Abies balsamea , while further north, the Eastern Canadian Shield taiga (of northern Quebec and Labrador ) is mostly black spruce Picea mariana and tamarack larch Larix laricina . Evergreen species in the taiga (spruce, fir, and pine) have

6390-515: The Eastern moose 's history is very well documented: moose meat was a staple in the diet of indigenous peoples for centuries. The common name "moose" was brought into English from the word used by those who lived in present day coastal Rhode Island . The indigenous people often used moose hides for leather and its meat as an ingredient in pemmican , a type of dried jerky used as a source of sustenance in winter or on long journeys. The historical range of

6532-462: The Narragansett moos and Eastern Abenaki mos ; according to early sources, these were likely derived from moosu , meaning "he strips off"), and possibly involved forms from multiple languages mutually reinforcing one another. The Proto-Algonquian form was *mo·swa . On average, an adult moose stands 1.4–2.1 m (4 ft 7 in – 6 ft 11 in) high at the shoulder, which

6674-656: The Scots pine is a common component of the taiga, while taiga of the Russian Far East and Mongolia is dominated by larch . Rich in spruce and Scots pine (in the western Siberian plain), the taiga is dominated by larch in Eastern Siberia, before returning to its original floristic richness on the Pacific shores. Two deciduous trees mingle throughout southern Siberia: birch and Populus tremula . The boreal forest/taiga supports

6816-489: The Scottish Highlands , some lowland/coastal areas of Iceland , and areas of northern Kazakhstan , northern Mongolia , and northern Japan (on the island of Hokkaidō ). The principal tree species, depending on the length of the growing season and summer temperatures, vary across the world. The taiga of North America is mostly spruce; Scandinavian and Finnish taiga consists of a mix of spruce , pines and birch ; Russian taiga has spruces, pines and larches depending on

6958-528: The circumpolar boreal forests or temperate broadleaf and mixed forests of the Northern Hemisphere , thriving in cooler, temperate areas as well as subarctic climates . Hunting shaped the relationship between moose and humans, both in Eurasia and North America. Prior to the colonial era (around 1600-1700 CE), moose were one of many valuable sources of sustenance for certain tribal groups and First Nations . Hunting and habitat loss have reduced

7100-419: The golden eagle , rough-legged buzzard (also known as the rough-legged hawk), Steller's sea eagle (in coastal northeastern Russia-Japan), great gray owl , snowy owl , barred owl , great horned owl , crow and raven . The only other viable adaptation is seed-eating birds, which include several species of grouse , capercaillie and crossbills . Fire has been one of the most important factors shaping

7242-445: The middle boreal (closed forest), and the southern boreal , a closed-canopy, boreal forest with some scattered temperate, deciduous trees among the conifers. Commonly seen are species such as maple, elm and oak. This southern boreal forest experiences the longest and warmest growing season of the biome. In some regions, including Scandinavia and western Russia, this subzone is commonly used for agricultural purposes. The boreal forest

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7384-498: The peatlands . During the last quarter of the twentieth century, the zone of latitude occupied by the boreal forest experienced some of the greatest temperature increases on Earth. Winter temperatures have increased more than summer temperatures. In summer, the daily low temperature has increased more than the daily high temperature. The number of days with extremely cold temperatures (e.g., −20 to −40 °C; −4 to −40 °F) has decreased irregularly but systematically in nearly all

7526-628: The 18th and 19th century, respectively. By the early 20th century, the last strongholds of the European moose appeared to be in Fennoscandian areas and patchy tracts of Russia, with a few migrants found in what is now Estonia and Lithuania . The USSR and Poland managed to restore portions of the range within its borders (such as the 1951 reintroduction into Kampinos National Park and the later 1958 reintroduction in Belarus), but political complications limited

7668-513: The 1990s. Populations expanded greatly with improved habitat and protection, but now the moose population is declining rapidly. This decline has been attributed to opening of roads and landscapes into the northern range of moose, allowing deer to become populous in areas where they were not previously common. This encroachment by deer on moose habitat brought moose into contact with previously unfamiliar pathogens, including brainworm and liver fluke, and these parasites are believed to have contributed to

7810-765: The 8th century, during the Early Middle Ages , the species was known as Old English : elch, elh, eolh, derived from the Proto-Germanic : *elho- , *elhon- and possibly connected with the Old Norse : elgr . Later, the species became known in Middle English as elk , elcke , or elke , appearing in the Latinized form alke , with the spelling alce borrowed directly from Latin: alces . The word "elk" remained in usage because of English-speakers' familiarity with

7952-842: The Americas, moose injure more people than any other wild mammal; worldwide, only hippopotamuses injure more. When harassed or startled by people or in the presence of a dog , moose may charge. Also, as with bears or most wild animals, moose accustomed to being fed by people may act aggressively when denied food. During the fall mating season, bulls may be aggressive toward humans. Cows are protective of young calves and will attack humans who come close, especially if they come between mother and calf. Moose are not territorial, do not view humans as food, and usually will not pursue humans who run away. Moose are unpredictable. They are most likely to attack if annoyed or harassed, or if approached too closely. A moose that has been harassed may vent its anger on anyone in

8094-460: The Cordilleran region, fire is most frequent in the valley bottoms, decreasing upward, as shown by a mosaic of young pioneer pine and broadleaf stands below, and older spruce–fir on the slopes above. Without fire, the boreal forest would become more and more homogeneous, with the long-lived white spruce gradually replacing pine, aspen, balsam poplar, and birch, and perhaps even black spruce, except on

8236-577: The Hudson Bay area), chum salmon , Siberian taimen , lenok and lake chub . The taiga is mainly home to a number of large herbivorous mammals , such as Alces alces ( moose ), and a few subspecies of Rangifer tarandus ( reindeer in Eurasia; caribou in North America). Some areas of the more southern closed boreal forest have populations of other Cervidae species, such as the maral , elk , Sitka black-tailed deer , and roe deer . While normally

8378-441: The Russian far-east, as part of the taiga regeneration project called Pleistocene Park , in addition to Przewalski's horse . Small mammals of the taiga biome include rodent species such as the beaver , squirrel , chipmunk , marmot , lemming , North American porcupine and vole , as well as a small number of lagomorph species, such as the pika , snowshoe hare and mountain hare . These species have adapted to survive

8520-795: The ability to reintroduce it to other portions of its range. Attempts in 1930 and again in 1967 in marshland north of Berlin were unsuccessful. At present in Poland, populations are recorded in the Biebrza river valley, Kampinos, and in Białowieża Forest . It has migrated into other parts of Eastern Europe and has been spotted in eastern and southern Germany. Unsuccessful thus far in recolonizing these areas via natural dispersal from source populations in Poland , Belarus , Ukraine , Czech Republic , and Slovakia , it appears to be having more success migrating south into

8662-423: The ages of two and eight are seldom killed by wolves. Though moose are usually hunted by packs, there are cases in which single wolves have successfully killed healthy, fully-grown moose. Research into moose predation suggests that their response to perceived threats is learned rather than instinctual. In practical terms this means moose are more vulnerable in areas where wolf or bear populations were decimated in

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8804-557: The antlers of a mature bull are between 1.2 and 1.5 m (3 ft 11 in and 4 ft 11 in). The largest confirmed size for this species was a bull shot at the Yukon River in September 1897 that weighed 820 kg (1,808 lb) and measured 2.33 m (7 ft 8 in) high at the shoulder. There have been reported cases of even larger moose, including a bull killed in 2004 that weighed 1,043 kg (2,299 lb), and

8946-615: The attention of large males, promotes male-male competition and violence, reduces harassment of cows by small males, and increases mating opportunities with large males. This in turn means that the cow moose has at least a small degree of control over which bulls she mates with. Moose often show aggression to other animals as well, especially predators. Bears are common predators of moose calves and, rarely, adults. Alaskan moose have been reported to successfully fend off attacks from both black and brown bears. Moose have been known to stomp attacking wolves, which makes them less preferred as prey to

9088-440: The boreal forest is high-intensity crown fires or severe surface fires of very large size, often more than 10,000 ha (100 km ), and sometimes more than 400,000 ha (4000 km ). Such fires kill entire stands. Fire rotations in the drier regions of western Canada and Alaska average 50–100 years, shorter than in the moister climates of eastern Canada, where they may average 200 years or more. Fire cycles also tend to be long near

9230-471: The boreal forest, typically with abrupt, irregular boundaries circumscribing homogenous stands, is indirect but compelling testimony to the role of fire in shaping the forest. The fact is that most boreal forest stands are less than 100 years old, and only in the rather few areas that have escaped burning are there stands of white spruce older than 250 years. The prevalence of fire-adaptive morphologic and reproductive characteristics of many boreal plant species

9372-527: The boreal region, allowing better survival for tree-damaging insects. In Fairbanks, Alaska , the length of the frost-free season has increased from 60 to 90 days in the early twentieth century to about 120 days a century later. It has been hypothesized that the boreal environments have only a few states which are stable in the long term - a treeless tundra/steppe, a forest with >75% tree cover and an open woodland with ~20% and ~45% tree cover. Thus, continued climate change would be able to force at least some of

9514-552: The coldest month is between −6 °C (21 °F) and −50 °C (−58 °F). There are also some much smaller areas grading towards the oceanic Cfc climate with milder winters, whilst the extreme south and (in Eurasia) west of the taiga reaches into humid continental climates ( Dfb , Dwb ) with longer summers. According to some sources, the boreal forest grades into a temperate mixed forest when mean annual temperature reaches about 3 °C (37 °F). Discontinuous permafrost

9656-614: The complex snout may assist the moose in this type of feeding. Moose are the only deer that are capable of feeding underwater. As an adaptation for feeding on plants underwater, the nose is equipped with fatty pads and muscles that close the nostrils when exposed to water pressure, preventing water from entering the nose. Other species can pluck plants from the water too, but these need to raise their heads in order to swallow. Moose are not grazing animals but browsers (concentrate selectors). Like giraffes , moose carefully select foods with less fiber and more concentrations of nutrients. Thus,

9798-521: The composition and development of boreal forest stands; it is the dominant stand-renewing disturbance through much of the Canadian boreal forest. The fire history that characterizes an ecosystem is its fire regime , which has 3 elements: (1) fire type and intensity (e.g., crown fires, severe surface fires, and light surface fires), (2) size of typical fires of significance, and (3) frequency or return intervals for specific land units. The average time within

9940-696: The cow begins estrus again (typically 18 months after the birth of a calf). At this point, the cow chases their calf away. Although generally slow-moving and sedentary, moose can become defensively aggressive, and move very quickly if angered or startled. Their mating season in the autumn features energetic fights between males competing for a female. Alces alces is called a "moose" in North American English , but an "elk" in British English . The word "elk" in North American English refers to

10082-480: The dark winters, depending on latitude. The areas of the taiga inside the Arctic Circle have midnight sun in mid-summer and polar night in mid-winter. The taiga experiences relatively low precipitation throughout the year (generally 200–750 mm (7.9–29.5 in) annually, 1,000 mm (39 in) in some areas), primarily as rain during the summer months, but also as snow or fog . Snow may remain on

10224-531: The dense vegetation growth including large trees. This explains the striking difference in biomass per square metre between the Taiga and the Steppe biomes, (in warmer climates), where evapotranspiration exceeds precipitation, restricting vegetation to mostly grasses. In general, taiga grows to the south of the 10 °C (50 °F) July isotherm , occasionally as far north as the 9 °C (48 °F) July isotherm, with

10366-459: The ease with which plants can use its nutrients. The relative lack of deciduous trees, which drop huge volumes of leaves annually, and grazing animals, which contribute significant manure, are also factors. The diversity of soil organisms in the boreal forest is high, comparable to the tropical rainforest . Fallen leaves and moss can remain on the forest floor for a long time in the cool, moist climate, which limits their organic contribution to

10508-459: The forest history of an area 280 km north of the then-current tree line at Ennadai Lake, District Keewatin, Northwest Territories. Two lines of evidence support the thesis that fire has always been an integral factor in the boreal forest: (1) direct, eye-witness accounts and forest-fire statistics, and (2) indirect, circumstantial evidence based on the effects of fire, as well as on persisting indicators. The patchwork mosaic of forest stands in

10650-404: The ground for as long as nine months in the northernmost extensions of the taiga biome. The fog, especially predominant in low-lying areas during and after the thawing of frozen Arctic seas, stops sunshine from getting through to plants even during the long summer days. As evaporation is consequently low for most of the year, annual precipitation exceeds evaporation, and is sufficient to sustain

10792-458: The ground. Moose are excellent swimmers and are known to wade into water to eat aquatic plants. This trait serves a second purpose in cooling down the moose on summer days and ridding itself of black flies . Moose are thus attracted to marshes and river banks during warmer months as both provide suitable vegetation to eat and water to wet themselves in. Moose have been known to dive over 5.5 metres (18 ft) to reach plants on lake bottoms, and

10934-519: The ground. Periodic stand-replacing wildfires (with return times of between 20 and 200 years) clear out the tree canopies, allowing sunlight to invigorate new growth on the forest floor. For some species, wildfires are a necessary part of the life cycle in the taiga; some, e.g. jack pine have cones which only open to release their seed after a fire, dispersing their seeds onto the newly cleared ground; certain species of fungi (such as morels ) are also known to do this. Grasses grow wherever they can find

11076-493: The harsh winters in their native ranges. Some larger mammals, such as bears , eat heartily during the summer in order to gain weight, and then go into hibernation during the winter. Other animals have adapted layers of fur or feathers to insulate them from the cold. Predatory mammals of the taiga must be adapted to travel long distances in search of scattered prey, or be able to supplement their diet with vegetation or other forms of food (such as raccoons ). Mammalian predators of

11218-485: The head at right angles to the midline of the skull, and then fork. The lower prong of this fork may be either simple, or divided into two or three tines , with some flattening. Most moose have antlers that are broad and palmate (flat) with tines (points) along the outer edge. Within the ecologic range of the moose in Europe, northern populations display the palmate pattern of antlers, while the antlers of European moose residing

11360-486: The interior of the continents, with the driest climates, the boreal forests might grade into temperate grassland . There are two major types of taiga. The southern part is the closed canopy forest , consisting of many closely-spaced trees and mossy groundcover. In clearings in the forest, shrubs and wildflowers are common, such as the fireweed and lupine . The other type is the lichen woodland or sparse taiga , with trees that are farther-spaced and lichen groundcover;

11502-408: The large ungulates are weakened by harsh winter conditions. Orcas ( Orcinus orca ) are the moose's only confirmed marine predator as they have been known to prey on moose and other deer swimming between islands out of North America's Northwest Coast. However, such kills are rare and a matter of opportunity, as moose are not a regular part of the orca diet. There is at least one recorded instance of

11644-485: The last Ice Age, as Europe had a mix of temperate boreal and deciduous forest. Up through Classical times, the species was certainly thriving in both Gaul and Magna Germania , as it appears in military and hunting accounts of the age. However, as the Roman era faded into medieval times, the beast slowly disappeared: soon after the reign of Charlemagne , the moose disappeared from France , where its range extended from Normandy in

11786-425: The latter is common in the northernmost taiga. In the northernmost taiga, the forest cover is not only more sparse, but often stunted in growth form; moreover, ice-pruned , asymmetric black spruce (in North America) are often seen, with diminished foliage on the windward side. In Canada, Scandinavia and Finland, the boreal forest is usually divided into three subzones: The high boreal (northern boreal/taiga zone),

11928-471: The long, cold winter is the dominant feature. This climate is classified as Dfc , Dwc , Dsc , Dfd and Dwd in the Köppen climate classification scheme, meaning that the short summers (24 h average 10 °C (50 °F) or more), although generally warm and humid, only last 1–3 months, while winters, with average temperatures below freezing, last 5–7 months. In Siberian taiga the average temperature of

12070-442: The males assess which of them is dominant and one bull may retreat, however, the interaction can escalate to a fight using their antlers. Female moose have an eight-month gestation period, usually bearing one calf, or twins if food is plentiful, in May or June. Twinning can run as high as 30% to 40% with good nutrition Newborn moose have fur with a reddish hue in contrast to the brown appearance of an adult. The young will stay with

12212-644: The mating season. Rutting and mating occurs in September and October. During the rut , mature bulls will cease feeding completely for a period of approximately two weeks; this fasting behavior has been attributed to neurophysiological changes related to redeployment of olfaction for detection of moose urine and moose cows. The males are polygynous and will seek several females to breed with . During this time both sexes will call to each other. Males produce heavy grunting sounds that can be heard from up to 500 metres (1,600 ft) away, while females produce wail-like sounds. Males will fight for access to females. Initially,

12354-406: The mean annual temperature reaches down to −10 °C (14 °F), and the lowest reliably recorded temperatures in the Northern Hemisphere were recorded in the taiga of northeastern Russia. Taiga has a subarctic climate with very large temperature range between seasons. −20 °C (−4 °F) would be a typical winter day temperature and 18 °C (64 °F) an average summer day, but

12496-472: The mid 17th century from Maine south to areas within 160 kilometers (100 mi) of present-day Manhattan. However, by the 1870s, only a handful of moose existed in this entire region in very remote pockets of forest; less than 20% of suitable habitat remained. Since the 1980s, however, moose populations have rebounded, thanks to regrowth of plentiful food sources, abandonment of farmland, better land management, clean-up of pollution, and natural dispersal from

12638-452: The mining company announced it would cease operations. The mines were finally closed on 30 April 1973, and the village was more or less abandoned. A museum, Knaben Gruvemuseum has been established in the old administration building, and is run by Knabens Venner and Kvinesdal municipality. Norsk Bergverksmuseum is running a pilot project at the Knaben mining community. A large sand deposit in

12780-462: The mining rights of the area were bought for 6,000  kr , and subsequently sold to an English company in 1904 for 250,000  kr . Due to low molybdenum prices the mining operations ceased in 1909. World War I led to an uprise at Knaben. At its height ten different mining companies had operations in the area, but all operations ceased when the war was over. The Swedish company Avesta Järnverks AB took over from A/S Knaben Molybdængruber , and

12922-435: The moose foot into soft ground or snow, and which increases efficiency when swimming. The body weight per footprint surface area of the moose foot is intermediate between that of the pronghorn foot, (which have stiff feet lacking dewclaws—optimized for high-speed running) and the caribou foot (which are more rounded with large dewclaws, optimized for walking in deep snow). The moose's body weight per surface area of footprint

13064-835: The moose population is declining rapidly in the Midwest. Moose were successfully introduced on Newfoundland in 1878 and 1904, where they are now the dominant ungulate , and somewhat less successfully on Anticosti Island in the Gulf of Saint Lawrence . Since the 1990s, moose populations have declined dramatically in much of temperate North America, although they remain stable in Arctic and subarctic regions. The exact causes of specific die-offs are not determined, but most documented mortality events were due to wolf predation, bacterial infection due to injuries sustained from predators, and parasites from white-tailed deer to which moose have not developed

13206-587: The moose's digestive system has evolved to accommodate this relatively low-fiber diet. Unlike most hooved, domesticated animals ( ruminants ), moose cannot digest hay , and feeding it to a moose can be fatal. The moose's varied and complex diet is typically expensive for humans to provide, and free-range moose require a lot of forested hectarage for sustainable survival, which is one of the main reasons moose have never been widely domesticated. A full-grown moose has few enemies except Siberian tigers ( Panthera tigris tigris ) which regularly prey on adult moose, but

13348-499: The moose's range; this fragmentation has led to sightings of "urban moose" in some areas. The moose has been reintroduced to some of its former habitats. Currently, the greatest populations occur in Canada , where they can be found in all provinces (excepting Nunavut and Prince Edward Island ); additionally, substantial numbers of moose are found in Alaska , New England (with Maine having

13490-465: The most extreme winter weather. The Dahurian larch tolerates the coldest winters of the Northern Hemisphere, in eastern Siberia. The very southernmost parts of the taiga may have trees such as oak , maple , elm and lime scattered among the conifers, and there is usually a gradual transition into a temperate, mixed forest, such as the eastern forest-boreal transition of eastern Canada. In

13632-707: The most of the contiguous United States ), the State of New York , Fennoscandia , the Baltic states , the Caucasus region, Belarus , Poland , Eastern Europe , Mongolia , Kazakhstan , and Russia . In the United States (outside of Alaska and New England), most moose are found further to the north, west and northeast (including Colorado , Idaho , Michigan , Minnesota , Montana , North Dakota , Utah , Vermont , Wisconsin and Wyoming ), and individuals have been documented wandering as far south as western Oklahoma , northeastern Arizona and northwestern New Mexico . Predominantly

13774-528: The mother until just before the next young are born. The life span of an average moose is about 15–25 years. Moose populations are stable at 25 calves for every 100 cows at 1 year of age. With availability of adequate nutrition, mild weather, and low predation, moose have a huge potential for population expansion. Moose are not typically aggressive towards humans, but will be aggressive when provoked or frightened. Moose attack more people than bears and wolves combined, but usually with only minor consequences. In

13916-411: The new growths from deciduous trees with a high sugar content, such as white birch, trembling aspen and striped maple , among many others. To reach high branches, a moose may bend small saplings down, using its prehensile lip, mouth or body. For larger trees a moose may stand erect and walk upright on its hind legs, allowing it to reach branches up to 4.26 meters (14 ft 0 in) or higher above

14058-658: The north to the Pyrenees in the south. Farther east, it survived in Alsace and the Netherlands until the 9th century as the marshlands in the latter were drained and the forests were cleared away for feudal lands in the former. It was gone from Switzerland by the year 1000, from the western Czech Republic by 1300, from Mecklenburg in Germany by c. 1600, and from Hungary and the Caucasus since

14200-464: The nutrients. If a bull moose is castrated , either by accidental or chemical means , he will shed his current set of antlers within two weeks and then immediately begin to grow a new set of misshapen and deformed antlers that he will wear the rest of his life without ever shedding again; similarly deformed antlers can result from a deficiency of testosterone caused by cryptorchidism or old age. These deformed antlers are composed of living bone which

14342-533: The order Artiodactyla ( even-toed ungulates ), moose feet have two large keratinized hooves corresponding to the third and fourth toe, with two small posterolateral dewclaws (vestigial digits), corresponding to the second and fifth toe. The hoof of the fourth digit is broader than that of the third digit, while the inner hoof of the third digit is longer than that of the fourth digit. This foot configuration may favor striding on soft ground. The moose hoof splays under load, increasing surface area, which limits sinking of

14484-660: The origin of this differential use in North America and how this differentiation distorts established Russian usage. Climate change is a threat to taiga, and how the carbon dioxide absorbed or emitted should be treated by carbon accounting is controversial. Taiga covers 17 million square kilometres (6.6 million square miles) or 11.5% of the Earth's land area, second only to deserts and xeric shrublands . The largest areas are located in Russia and Canada. In Sweden taiga

14626-450: The past but are now rebounding. These same studies suggest, however, that moose learn quickly and adapt, fleeing an area if they hear or smell wolves, bears, or scavenger birds such as ravens. Moose are also subject to various diseases and forms of parasitism. In northern Europe, the moose botfly is a parasite whose range seems to be spreading. Moose typically carry a heavy burden of parasites, both externally and internally. Parasitosis

14768-406: The patterns of vegetation on the landscape, which in the east favour black spruce, paper birch, and jack pine over balsam fir, and in the west give the advantage to aspen, jack pine, black spruce, and birch over white spruce. Many investigators have reported the ubiquity of charcoal under the forest floor and in the upper soil profile. Charcoal in soils provided Bryson et al. (1965) with clues about

14910-471: The pines to disperse seed at all seasons. Only balsam fir and alpine fir seem to be poorly adapted to reproduce after fire, as their cones disintegrate at maturity, leaving no seed in the crowns. The oldest forests in the northwest boreal region, some older than 300 years, are of white spruce occurring as pure stands on moist floodplains . Here, the frequency of fire is much less than on adjacent uplands dominated by pine, black spruce and aspen. In contrast, in

15052-643: The population decline of moose. In North America , the moose range includes almost all of Canada (excluding the arctic and Vancouver Island ), most of Alaska , northern and eastern North Dakota , northern New England , the Adirondack Mountain region and Taconic highlands of northeast New York State, the upper Rocky Mountains , northern Minnesota , northern Wisconsin , Michigan 's Upper Peninsula , and Isle Royale in Lake Superior . This massive range, containing diverse habitats, contains four of

15194-591: The posterior division of the main fork divides into three tines, with no distinct flattening. In the common moose ( A. a. alces ) this branch usually expands into a broad palmation, with one large tine at the base and a number of smaller snags on the free border. There is, however, a Scandinavian breed of the common moose in which the antlers are simpler and recall those of the East Siberian animals. The palmation appears to be more marked in North American moose than in

15336-423: The presently existing taiga forests into one of the two woodland states or even into a treeless steppe - but it could also shift tundra areas into woodland or forest states as they warm and become more suitable for tree growth. In keeping with this hypothesis, several studies published in the early 2010s found that there was already a substantial drought-induced tree loss in the western Canadian boreal forests since

15478-414: The production increased through the 1930s, with about 400 mine workers and a total population at Knaben of about 700. At the time Norway was invaded in 1940, during World War II , the Knaben mines were one of the only molybdenum mines in Europe still in operation. The occupying German forces stationed about 1,000 men in the area, and established gun sites for anti-aircraft guns. The mine operations were

15620-467: The record for the heaviest weight at 36 kilograms (79 lb). Antler beam diameter, not the number of tines, indicates age. In North America, moose ( A. a. americanus ) antlers are usually larger than those of Eurasian moose and have two lobes on each side, like a butterfly. Eurasian moose antlers resemble a seashell, with a single lobe on each side. In the North Siberian moose ( A. a. bedfordiae ),

15762-782: The region; and the Eastern Siberian taiga is a vast larch forest. Taiga in its current form is a relatively recent phenomenon, having only existed for the last 12,000 years since the beginning of the Holocene epoch, covering land that had been mammoth steppe or under the Scandinavian Ice Sheet in Eurasia and under the Laurentide Ice Sheet in North America during the Late Pleistocene . Although at high elevations taiga grades into alpine tundra through Krummholz , it

15904-422: The risk of predation by wolves and avoid areas with deep snow, as this impairs mobility. Thus, moose select habitat on the basis of trade-offs between risk of predation, food availability, and snow depth. With reintroduction of bison into boreal forest, there was some concern that bison would compete with moose for winter habitat, and thereby worsen the population decline of moose. However, this does not appear to be

16046-501: The seasons to address these requirements. Moose are cold-adapted mammals with thickened skin, dense, heat-retaining coat, and a low surface:volume ratio, which provides excellent cold tolerance but poor heat tolerance. Moose survive hot weather by accessing shade or cooling wind, or by immersion in cool water. In hot weather, moose are often found wading or swimming in lakes or ponds. When heat-stressed, moose may fail to adequately forage in summer and may not gain adequate body fat to survive

16188-623: The six North American subspecies. In the West, moose populations extend across Canada ( British Columbia and Alberta ). Isolated groups have been verified as far south as the mountains of Utah and Colorado and as far west as the Lake Wenatchee area of the Washington Cascades . In the northwestern US, the range includes Wyoming , Montana , Idaho , and smaller areas of Washington , and Oregon . Moose have extended their range southwards in

16330-419: The skin raw trying to get the ticks off, making them look white when their outer coat rubs off. Locals call them ghost moose. Loss of the insulating winter coat through attempts to rid the moose of winter tick increases the risk of hypothermia in winter. In Europe , moose are currently found in large numbers throughout Norway , Sweden , Finland , Latvia , Estonia , Poland , with more modest numbers in

16472-416: The soil. Acids from evergreen needles further leach the soil, creating spodosol , also known as podzol , and the acidic forest floor often has only lichens and some mosses growing on it. In clearings in the forest and in areas with more boreal deciduous trees, there are more herbs and berries growing, and soils are consequently deeper. Since North America and Eurasia were originally connected by

16614-400: The source of several myths and legends among many groups of Inuit as well as several other tribes of indigenous peoples of North America. In extremely rare circumstances, a cow moose may grow antlers. This is usually attributed to a hormone imbalance. The moose proboscis is distinctive among living cervids due to its large size; it also features nares that can be sealed shut when the moose

16756-409: The southerly portion of its range are typically of the cervina dendritic pattern and comparatively small, perhaps due to evolutionary pressures of hunting by humans, who prize the large palmate antlers. European moose with antlers intermediate between the palmate and the dendritic form are found in the middle of the north-south range. Moose with antlers have more acute hearing than those without antlers;

16898-509: The southern Czech Republic , Belarus , and northern Ukraine . They are also widespread through Russia on up through the borders with Finland south towards the border with Estonia, Belarus and Ukraine and stretching far away eastwards to the Yenisei River in Siberia . The European moose was native to most temperate areas with suitable habitat on the continent and even Scotland from the end of

17040-543: The southern extent of their range is increasing heat stress brought on by the rapid seasonal temperature upswings as a result of human-induced climate change . Biologists studying moose populations typically use warm-season, heat-stress thresholds of between 14 and 24 °C (57 and 75 °F). However, the minor average temperature increase of 0.83–1.11 °C (1.5–2 °F), over the last 100 years, has resulted in milder winters that induce favorable conditions for ticks, parasites and other invasive species to flourish within

17182-434: The southern limit more variable. Depending on rainfall, and taiga may be replaced by forest steppe south of the 15 °C (59 °F) July isotherm where rainfall is very low, but more typically extends south to the 18 °C (64 °F) July isotherm, and locally where rainfall is higher, such as in eastern Siberia and adjacent Outer Manchuria , south to the 20 °C (68 °F) July isotherm. In these warmer areas

17324-582: The southern range of moose habitat in North America. The moose population in New Hampshire fell from 7,500 in the early 2000s to a 2014 estimate of 4,000 and in Vermont the numbers were down to 2,200 from a high of 5,000 animals in 2005. Much of the decline has been attributed to the winter tick, which, between 2017 and 2019, accounted for 74% of all winter mortality and 91% of winter calf deaths in Vermont. Moose with heavy tick infections will rub their fur down to

17466-529: The species in Continental Europe ; however, without any living animals around to serve as a reference, the meaning became rather vague, and by the 17th century "elk" had a meaning similar to "large deer". Dictionaries of the 18th century simply described "elk" as a deer that was "as large as a horse". The word "moose" had first entered English by 1606 and is borrowed from the Algonquian languages (compare

17608-545: The state in the 1960s, with the population expanding from Vermont and New Hampshire; by 2010, the population was estimated at 850–950. Moose reestablished populations in eastern New York and Connecticut and appeared headed south towards the Catskill Mountains , a former habitat. In the Midwest U.S., moose are primarily limited to the upper Great Lakes region, but strays, primarily immature males, have been found as far south as eastern Iowa. For unknown reasons,

17750-590: The subspecies extended from well into Quebec, the Maritimes, and Eastern Ontario south to include all of New England finally ending in the very northeastern tip of Pennsylvania in the west, cutting off somewhere near the mouth of the Hudson River in the south. The moose has been extinct in much of the eastern U.S. for as long as 150 years, due to colonial era overhunting and destruction of its habitat: Dutch, French, and British colonial sources all attest to its presence in

17892-542: The summer months. The cold winters and short summers make the taiga a challenging biome for reptiles and amphibians , which depend on environmental conditions to regulate their body temperatures. There are only a few species in the boreal forest, including red-sided garter snake , common European adder , blue-spotted salamander , northern two-lined salamander , Siberian salamander , wood frog , northern leopard frog , boreal chorus frog , American toad , and Canadian toad . Most hibernate underground in winter. Fish of

18034-512: The sun is low in the horizon for most of the year, it is difficult for plants to generate energy from photosynthesis . Pine, spruce and fir do not lose their leaves seasonally and are able to photosynthesize with their older leaves in late winter and spring when light is good but temperatures are still too low for new growth to commence. The adaptation of evergreen needles limits the water lost due to transpiration and their dark green color increases their absorption of sunlight. Although precipitation

18176-465: The taiga has higher species diversity, with more warmth-loving species such as Korean pine , Jezo spruce , and Manchurian fir , and merges gradually into mixed temperate forest or, more locally (on the Pacific Ocean coasts of North America and Asia), into coniferous temperate rainforests where oak and hornbeam appear and join the conifers, birch and Populus tremula . The area currently classified as taiga in Europe and North America (except Alaska)

18318-531: The taiga include Canada lynx , Eurasian lynx , stoat , Siberian weasel , least weasel , sable , American marten , North American river otter , European otter , American mink , wolverine , Asian badger , fisher , timber wolf , Mongolian wolf , coyote , red fox , Arctic fox , grizzly bear , American black bear , Asiatic black bear , Ussuri brown bear , polar bear (only small areas of northern taiga), Siberian tiger , and Amur leopard . More than 300 species of birds have their nesting grounds in

18460-401: The taiga must be able to withstand cold water conditions and be able to adapt to life under ice-covered water. Species in the taiga include Alaska blackfish , northern pike , walleye , longnose sucker , white sucker , various species of cisco , lake whitefish , round whitefish , pygmy whitefish , Arctic lamprey , various grayling species, brook trout (including sea-run brook trout in

18602-787: The taiga. In Canada and Scandinavia, the growing season is often estimated by using the period of the year when the 24-hour average temperature is +5 °C (41 °F) or more. For the Taiga Plains in Canada, growing season varies from 80 to 150 days, and in the Taiga Shield from 100 to 140 days. Other sources define growing season by frost-free days. Data for locations in southwest Yukon gives 80–120 frost-free days. The closed canopy boreal forest in Kenozersky National Park near Plesetsk , Arkhangelsk Province , Russia, on average has 108 frost-free days. The longest growing season

18744-408: The taiga. Siberian thrush , white-throated sparrow , and black-throated green warbler migrate to this habitat to take advantage of the long summer days and abundance of insects found around the numerous bogs and lakes. Of the 300 species of birds that summer in the taiga, only 30 stay for the winter. These are either carrion -feeding or large raptors that can take live mammal prey, such as

18886-482: The target for allied bombing twice in 1943. The first attack took place on 3 March, with 10 British de Havilland Mosquito strike fighters of No. 139 Squadron RAF participating. The second attack was on 16 November, when 130 American B-17 bombers from the Eighth Air Force (in its mission number 131) attacked the Knaben molybdenum mines in a raid against Norway. The school at Knaben was built in 1954. In 1973,

19028-467: The tree line in the subarctic spruce-lichen woodlands. The longest cycles, possibly 300 years, probably occur in the western boreal in floodplain white spruce. Amiro et al. (2001) calculated the mean fire cycle for the period 1980 to 1999 in the Canadian boreal forest (including taiga) at 126 years. Increased fire activity has been predicted for western Canada, but parts of eastern Canada may experience less fire in future because of greater precipitation in

19170-418: The typical Scandinavian moose. After the mating season males drop their antlers to conserve energy for the winter. A new set of antlers will then regrow in the spring. Antlers take three to five months to fully develop, making them one of the fastest growing animal organs. Antler growth is "nourished by an extensive system of blood vessels in the skin covering, which contains numerous hair follicles that give it

19312-730: The valley is a visible result from 88 years of mining activity. The percentage of molybdenum was low, on average below 0.2%. The sand deposits cause some leaching of metals (cadmium, copper and molybdenum), and flotation of chemicals into the river Kvina . Today, tourism is the main activity at Knaben. There is an alpine ski resort in operation, and several mountain cabin resorts. The ski resort operates three different pistes of around 1,000m (3,280 ft) each, with an elevation of 182 m (597 ft). Moose The moose ( pl. : 'moose'; used in North America) or elk ( pl. : 'elk' or 'elks'; used in Eurasia ) ( Alces alces )

19454-527: The vicinity, and they often do not make distinctions between their tormentors and innocent passersby. Moose are very limber animals with highly flexible joints and sharp, pointed hooves, and are capable of kicking with both front and back legs. Unlike other large, hoofed mammals, such as horses, moose can kick in all directions, including sideways. Thus, there is no safe side from which to approach. Moose often give warning signs prior to attacking, displaying aggression by means of body language. Maintained eye contact

19596-404: The warmest month of the year usually is 10 °C (50 °F) or less. High latitudes mean that the sun does not rise far above the horizon, and less solar energy is received than further south. But the high latitude also ensures very long summer days, as the sun stays above the horizon nearly 20 hours each day, or up to 24 hours, with only around 6 hours of daylight, or none, occurring in

19738-618: The western Rocky Mountains, with initial sightings in Yellowstone National Park in 1868, and then to the northern slope of the Uinta Mountains in Utah in the first half of the twentieth century. This is the southernmost naturally established moose population in the United States. In 1978, a few breeding pairs were reintroduced in western Colorado, and the state's moose population is now more than 2,400. In northeastern North America,

19880-410: The winter. Also, moose cows may not calve without adequate summer weight gain. Moose require access to both young forest for browsing and mature forest for shelter and cover. Forest disturbed by fire and logging promotes the growth of fodder for moose. Moose also require access to mineral licks, safe places for calving and aquatic feeding sites. Moose avoid areas with little or no snow as this increases

20022-456: The wolves. Moose are fully capable of killing bears and wolves. In one rare event, a female moose killed two adult male wolves. A moose of either sex that is confronted by danger may let out a loud roar, more resembling that of a predator than a prey animal. European moose are often more aggressive than North American moose, such as the moose in Sweden, which often become very agitated at the sight of

20164-407: Was recently glaciated . As the glaciers receded they left depressions in the topography that have since filled with water, creating lakes and bogs (especially muskeg soil) found throughout the taiga. Taiga soil tends to be young and poor in nutrients, lacking the deep, organically enriched profile present in temperate deciduous forests. The colder climate hinders development of soil, and

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