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... individuals tend to return to the same areas year after year to give birth, these populations may in fact consist of several more sub-groups, but more research is necessary to find out if this is the case. The third narwhal population is found in the European Arctic, and does not enter Canadian wate ...
... individuals tend to return to the same areas year after year to give birth, these populations may in fact consist of several more sub-groups, but more research is necessary to find out if this is the case. The third narwhal population is found in the European Arctic, and does not enter Canadian wate ...
Habitat selection, reproduction and predation of wintering
... low in 2006. Collared lemmings increased in 2007 (although brown lemmings did not), whereas brown lemmings were very abundant in 2008. Stoats and arctic foxes are resident lemming predators on the island. The main avian predators, which are only present during the summer, are snowy owls, rough-legge ...
... low in 2006. Collared lemmings increased in 2007 (although brown lemmings did not), whereas brown lemmings were very abundant in 2008. Stoats and arctic foxes are resident lemming predators on the island. The main avian predators, which are only present during the summer, are snowy owls, rough-legge ...
wildlife - Sahtu Land Use | Planning Board
... Caribou Research Program (BCRP) have found that wolves can travel much faster through the forest along seismic lines than through the bush, especially during the summer. This increases their efficiency at finding and killing radiocollared caribou. As a result of this increased risk of predation, the ...
... Caribou Research Program (BCRP) have found that wolves can travel much faster through the forest along seismic lines than through the bush, especially during the summer. This increases their efficiency at finding and killing radiocollared caribou. As a result of this increased risk of predation, the ...
Lake size and fish diversity determine resource use and trophic
... fish top predators differ between oligotrophic high-latitude lakes with contrasting abiotic and biotic characteristics. Besides affecting the relative importance of littoral and pelagic trophic pathways, lake size may also influence fish species diversity (Barbour and Brown 1974; Nolby et al. 2015) ...
... fish top predators differ between oligotrophic high-latitude lakes with contrasting abiotic and biotic characteristics. Besides affecting the relative importance of littoral and pelagic trophic pathways, lake size may also influence fish species diversity (Barbour and Brown 1974; Nolby et al. 2015) ...
Seasonal Change in Trophic Niche of Adfluvial Arctic Grayling
... water systems [5,6,7]. Indeed, successful non-native invaders typically occupy a greater diversity of habitats, are active during longer time periods, and show more generalist foraging strategies than native species [8,9], allowing them to thrive across a broad range of environmental gradients, and ...
... water systems [5,6,7]. Indeed, successful non-native invaders typically occupy a greater diversity of habitats, are active during longer time periods, and show more generalist foraging strategies than native species [8,9], allowing them to thrive across a broad range of environmental gradients, and ...
Herbivory and the Circumpolar Biodiversity Monitoring Program
... • Arctic Terrestrial Biodiversity Monitoring Plan approved by Arctic Council, published ...
... • Arctic Terrestrial Biodiversity Monitoring Plan approved by Arctic Council, published ...
Why Do the Boreal Forest Ecosystems of Northwestern Europe Differ
... willow are interspersed among the mature white spruce (photo by Alice with that in November being only 23 cm Kenney). (b) A typical view of the boreal forest in central Norway, where the deep at Dawson City (10 cm at Kluane understory is covered by bilberry shrubs (photo by Petter Wabakken). Lake), ...
... willow are interspersed among the mature white spruce (photo by Alice with that in November being only 23 cm Kenney). (b) A typical view of the boreal forest in central Norway, where the deep at Dawson City (10 cm at Kluane understory is covered by bilberry shrubs (photo by Petter Wabakken). Lake), ...
Taiga - s3.amazonaws.com
... • Once divided into several species, all caribou and reindeer, including the domesticated reindeer, are now considered races of a single species. The races vary in coloration from almost black to brown, gray and almost white. • The caribou is the only deer in which both sexes have antlers, although ...
... • Once divided into several species, all caribou and reindeer, including the domesticated reindeer, are now considered races of a single species. The races vary in coloration from almost black to brown, gray and almost white. • The caribou is the only deer in which both sexes have antlers, although ...
Ringed SealS and Climate Change
... According to some predictions, in the near future there could be very little summer sea ice in the Arctic. Ringed Seals do not normally haul out on land and performing this behaviour would be a rather dramatic change to the species’ behavioural patterns. While closely related seals do perform this b ...
... According to some predictions, in the near future there could be very little summer sea ice in the Arctic. Ringed Seals do not normally haul out on land and performing this behaviour would be a rather dramatic change to the species’ behavioural patterns. While closely related seals do perform this b ...
Reports
... INTRODUCTION Changes in the abiotic environment caused by global warming, such as increased growing season length, permafrost melting, and nutrient availability due to higher mobilization of resources in warmer soils (Intergovernmental Panel on Climate Change [IPCC] 2001), are predicted to impose la ...
... INTRODUCTION Changes in the abiotic environment caused by global warming, such as increased growing season length, permafrost melting, and nutrient availability due to higher mobilization of resources in warmer soils (Intergovernmental Panel on Climate Change [IPCC] 2001), are predicted to impose la ...
1 Delphinapterus leucas (Pallas, 1776) English: White whale
... General patterns: Not all white whales are migratory. Some populations are resident in welldefined areas, for example in Cook Inlet, the St. Lawrence estuary and possibly in Cumberland Sound (Reyes, 1991). As determined by radio-telemetry, whales use waters e.g. in the upper Cook Inlet intensively b ...
... General patterns: Not all white whales are migratory. Some populations are resident in welldefined areas, for example in Cook Inlet, the St. Lawrence estuary and possibly in Cumberland Sound (Reyes, 1991). As determined by radio-telemetry, whales use waters e.g. in the upper Cook Inlet intensively b ...
Demographic response of tundra small mammals to a snow fencing
... several parts of northern Fennoscandia and Greenland (Hörnfeldt 2004, Hörnfeldt et al. 2005, Ims et al. 2008), a phenomenon that may have far-reaching consequences for the whole tundra food web. Changes in snow cover, including its depth, duration and density, have been invoked to ...
... several parts of northern Fennoscandia and Greenland (Hörnfeldt 2004, Hörnfeldt et al. 2005, Ims et al. 2008), a phenomenon that may have far-reaching consequences for the whole tundra food web. Changes in snow cover, including its depth, duration and density, have been invoked to ...
Chapter Six: BIOMES
... Cone shape of the trees helps to prevent the snow from covering them which could cause the branches to break Extremely low decomposition rate and acidic soil ...
... Cone shape of the trees helps to prevent the snow from covering them which could cause the branches to break Extremely low decomposition rate and acidic soil ...
Strength of asymmetric competition between predators in food webs
... sensitivity to competition mediated by changes in temporal mean and variance of available prey to the subdominant predator. A general implication from our result is that external resource subsidies (prey or habitats), monopolized by the dominant competitor, can significantly reduce the likelihood fo ...
... sensitivity to competition mediated by changes in temporal mean and variance of available prey to the subdominant predator. A general implication from our result is that external resource subsidies (prey or habitats), monopolized by the dominant competitor, can significantly reduce the likelihood fo ...
Dendroflora of the Commander Islands, Russia
... Georg Steller. Carl von Linne called him “a born collector of plants”. During his extreme and adventurous stay at Bering Island, where Vitus Bering died, Steller collected a rich herbarium and compiled Catalogus plantarum in insula Beringii observatarum, in which he included 218 names of vascular pl ...
... Georg Steller. Carl von Linne called him “a born collector of plants”. During his extreme and adventurous stay at Bering Island, where Vitus Bering died, Steller collected a rich herbarium and compiled Catalogus plantarum in insula Beringii observatarum, in which he included 218 names of vascular pl ...
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... b). A quantitative example: the total ice covered surface in April was 14.2 million km2 in 2011, compared to a mean of 15 million km2 for the 1979 - 2000 period (NSIDC). This trend is probably to be attributed to climate change and long-term temperature increase. Moreover, very important year-to-yea ...
... b). A quantitative example: the total ice covered surface in April was 14.2 million km2 in 2011, compared to a mean of 15 million km2 for the 1979 - 2000 period (NSIDC). This trend is probably to be attributed to climate change and long-term temperature increase. Moreover, very important year-to-yea ...
Biological Control of Aleutian Island Arctic Fox
... or be excluded from the range of sympatry. This ecological relationship is commonly referred to as the competitive exclusion principle (Hardin, 1960). Research on the dynamics of sympatric populations of arctic and red fox suggest that both types of competition occur. In Russia, Skrobov (1960) and C ...
... or be excluded from the range of sympatry. This ecological relationship is commonly referred to as the competitive exclusion principle (Hardin, 1960). Research on the dynamics of sympatric populations of arctic and red fox suggest that both types of competition occur. In Russia, Skrobov (1960) and C ...
Major Ecosystems of the World
... Grassland soil has considerable organic material, because of die off of upper portions of many grasses each winter and their contribution to the organic content of the soil Ideal growing conditions for crops such as corn and wheat, which are also grasses Because this biome well suited to agriculture ...
... Grassland soil has considerable organic material, because of die off of upper portions of many grasses each winter and their contribution to the organic content of the soil Ideal growing conditions for crops such as corn and wheat, which are also grasses Because this biome well suited to agriculture ...
Introduction - Canadian Geographic
... from the past helps scientists to learn more about how the Arctic is changing today. The study of marine diatoms reveals changes that will impact the entire Arctic food chain, which relies on marine diatoms at its foundation. As a class, locate the Beaufort Sea and place a pylon there. Tell students ...
... from the past helps scientists to learn more about how the Arctic is changing today. The study of marine diatoms reveals changes that will impact the entire Arctic food chain, which relies on marine diatoms at its foundation. As a class, locate the Beaufort Sea and place a pylon there. Tell students ...
Bundling Up for Polar Bears!
... Explore works of art created by Inuit artists, including stone sculptures. Creative Movement – Use a variety of body movements to move like a polar bear. Develop skits that will communicate an environmentally-friendly message. Present to other classes. ...
... Explore works of art created by Inuit artists, including stone sculptures. Creative Movement – Use a variety of body movements to move like a polar bear. Develop skits that will communicate an environmentally-friendly message. Present to other classes. ...
biomes Part2 - Fulton County Schools
... that is characterized by very low winter temperatures, short, cool summers, and vegetation that consists of grasses, lichens, and perennial herbs. • The tundra also gets very little rain fall. ...
... that is characterized by very low winter temperatures, short, cool summers, and vegetation that consists of grasses, lichens, and perennial herbs. • The tundra also gets very little rain fall. ...
Impacts of changing sea-ice conditions on Arctic marine mammals
... walruses is restricted by their narrow ecological niche. They depend on shallow water (≤100 m) with suitable bottom substrate to support high bivalve abundances, reliable open water over rich feeding areas, and haul-out platforms (ice or land) near feeding areas (Fay 1982). For much of the year, the ...
... walruses is restricted by their narrow ecological niche. They depend on shallow water (≤100 m) with suitable bottom substrate to support high bivalve abundances, reliable open water over rich feeding areas, and haul-out platforms (ice or land) near feeding areas (Fay 1982). For much of the year, the ...
Grassland, Desert, and Tundra Biomes
... mice, and rabbits. These rodents burrow underground during the winter but they are still active. Many animals that live in the tundra year-round, such as arctic foxes, lose their brown fur and grow white fur that camouflages them with the winter snow. These animals are also extremely well insulated. ...
... mice, and rabbits. These rodents burrow underground during the winter but they are still active. Many animals that live in the tundra year-round, such as arctic foxes, lose their brown fur and grow white fur that camouflages them with the winter snow. These animals are also extremely well insulated. ...
Grassland, Desert, and Tundra Biomes
... mice, and rabbits. These rodents burrow underground during the winter but they are still active. Many animals that live in the tundra year-round, such as arctic foxes, lose their brown fur and grow white fur that camouflages them with the winter snow. These animals are also extremely well insulated. ...
... mice, and rabbits. These rodents burrow underground during the winter but they are still active. Many animals that live in the tundra year-round, such as arctic foxes, lose their brown fur and grow white fur that camouflages them with the winter snow. These animals are also extremely well insulated. ...