The Carrying Capacity Of An Ecosystem
... What Is The Carrying Capacity Of The Ecosystem? What Factors Affect The Carrying Capacity Of The Ecosystem? What are some types of Ecosystems? ...
... What Is The Carrying Capacity Of The Ecosystem? What Factors Affect The Carrying Capacity Of The Ecosystem? What are some types of Ecosystems? ...
Willow-characterised shrub vegetation in tundra and its relation to
... years 2007–2008 I was offered a possibility to work at the Botanical museum of Helsinki. During this time Teuvo Ahti helped me with lichen identication and Henry Väre with willow specimens. When staying in Rovaniemi, I was offered accommodation and laboratory facilities by the Finnish Forest Resear ...
... years 2007–2008 I was offered a possibility to work at the Botanical museum of Helsinki. During this time Teuvo Ahti helped me with lichen identication and Henry Väre with willow specimens. When staying in Rovaniemi, I was offered accommodation and laboratory facilities by the Finnish Forest Resear ...
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 ...
Lake size and fish diversity determine resource use and trophic
... morphometry, productivity, and fish species richness gradients to test how littoral reliance and trophic position of fish top predators differ between oligotrophic high-latitude lakes with contrasting abiotic and biotic characteristics. Besides affecting the relative importance of littoral and pelag ...
... morphometry, productivity, and fish species richness gradients to test how littoral reliance and trophic position of fish top predators differ between oligotrophic high-latitude lakes with contrasting abiotic and biotic characteristics. Besides affecting the relative importance of littoral and pelag ...
Polar Bear (Ursus maritimus) - Registre public des espèces en péril
... Special significance of the species The polar bear is the only terrestrial carnivore to occupy the highest trophic level of a marine ecosystem. The polar bear is an icon of Canada’s wildlife heritage, and is of great cultural significance to the Canadian people. Polar bears are also of cultural, sp ...
... Special significance of the species The polar bear is the only terrestrial carnivore to occupy the highest trophic level of a marine ecosystem. The polar bear is an icon of Canada’s wildlife heritage, and is of great cultural significance to the Canadian people. Polar bears are also of cultural, sp ...
Lichen Conservation - tn
... •Inventorying, documenting the lichen rich environments in areas of Western Ghats, Eastern Ghats, Mangroves and other forest areas to devise ‘Doable Lichen Centric’ conservation strategies. •Implementation of clean air acts. •Biologically rich fragmented sites in lichen rich locations require specia ...
... •Inventorying, documenting the lichen rich environments in areas of Western Ghats, Eastern Ghats, Mangroves and other forest areas to devise ‘Doable Lichen Centric’ conservation strategies. •Implementation of clean air acts. •Biologically rich fragmented sites in lichen rich locations require specia ...
Why Do the Boreal Forest Ecosystems of Northwestern Europe Differ
... In the northern boreal forest, both of these predators are specialists on snowshoe hares. The Eurasian lynx (Lynx lynx) is much larger than the Canada lynx (16 kg–34 kg versus 5 kg–17 kg, respectively) and acts like a generalist predator that frequently includes ungulates such as roe deer (Capreolus ...
... In the northern boreal forest, both of these predators are specialists on snowshoe hares. The Eurasian lynx (Lynx lynx) is much larger than the Canada lynx (16 kg–34 kg versus 5 kg–17 kg, respectively) and acts like a generalist predator that frequently includes ungulates such as roe deer (Capreolus ...
Polar Record: A Journal of Arctic and Antarctic Research
... ABSTRACT. We used a top–down, multidisciplinary approach to examine the physical and biological environment of the pack ice of the eastern Ross Sea (approximately 125–170◦ W) during the austral summer of 1999/2000 from RVIB Nathaniel B. Palmer and its ship-based helicopters. The approach focused on ...
... ABSTRACT. We used a top–down, multidisciplinary approach to examine the physical and biological environment of the pack ice of the eastern Ross Sea (approximately 125–170◦ W) during the austral summer of 1999/2000 from RVIB Nathaniel B. Palmer and its ship-based helicopters. The approach focused on ...
abstracts - Melrakkasetur
... circumpolar range. The cause for this apparent range-retraction has been attributed both to the greening of the arctic, accompanied by a range shift of the red fox and dampening or collapse of the small rodent cycle. On Varanger Peninsula, located in the sub-arctic climate zone, a long-term study as ...
... circumpolar range. The cause for this apparent range-retraction has been attributed both to the greening of the arctic, accompanied by a range shift of the red fox and dampening or collapse of the small rodent cycle. On Varanger Peninsula, located in the sub-arctic climate zone, a long-term study as ...
First results from an experiment excluding three sizes classes of
... large) on nine functional groups of plants in the low arctic tundra of the Yamal Peninsula (Russia). Herbivore faeces counts in the exclosures and pictures from automatic cameras proved that the experimental setup worked. The majority of plant groups did not respond to exclusion of herbivores, suppo ...
... large) on nine functional groups of plants in the low arctic tundra of the Yamal Peninsula (Russia). Herbivore faeces counts in the exclosures and pictures from automatic cameras proved that the experimental setup worked. The majority of plant groups did not respond to exclusion of herbivores, suppo ...
The Tundra Biome Tundra is the coldest of all the biomes
... drop to as low as -70 degrees Fahrenheit. There are powerful winds that can blow up to 100 miles an hour. As a result of the cold, the water in the ground freezes: the ground can be frozen to a depth of 2000 feet or more. In some places only a few inches of the top part of the ground thaw out in the ...
... drop to as low as -70 degrees Fahrenheit. There are powerful winds that can blow up to 100 miles an hour. As a result of the cold, the water in the ground freezes: the ground can be frozen to a depth of 2000 feet or more. In some places only a few inches of the top part of the ground thaw out in the ...
THE BENEFITS OF WINDBREAKS
... Dense windbreaks are useful for protecting roads and farm yards from drifting snow. They retain snow and shape it into deep, narrow drifts. Windbreaks of open structure, which distribute snow evenly over fields, are useful for protecting crops, reducing soil erosion and increasing soil moisture. Stu ...
... Dense windbreaks are useful for protecting roads and farm yards from drifting snow. They retain snow and shape it into deep, narrow drifts. Windbreaks of open structure, which distribute snow evenly over fields, are useful for protecting crops, reducing soil erosion and increasing soil moisture. Stu ...
Bear Species of the World - Bear Trust International
... Size: Adult males usually weigh from 150 to 650 pounds (68 to 295 kg), and females from 100 to 400 pounds (45 to 181 kg). Adults will grow to an average of 45 – 75 inches in length (114 cm to 191 cm), from nose to tail. Black bears in many eastern populations are larger than their western counterpar ...
... Size: Adult males usually weigh from 150 to 650 pounds (68 to 295 kg), and females from 100 to 400 pounds (45 to 181 kg). Adults will grow to an average of 45 – 75 inches in length (114 cm to 191 cm), from nose to tail. Black bears in many eastern populations are larger than their western counterpar ...
thesis_introduction
... The harbour seal, or common seal (Phoca vitulina Linnaeus 1758), is one of the most studied Phocid species mainly due to its broad coastal distribution, visibility and site fidelity. Centuries of interactions with humans through harvest, conflicts with fisheries or more recently tourism have given t ...
... The harbour seal, or common seal (Phoca vitulina Linnaeus 1758), is one of the most studied Phocid species mainly due to its broad coastal distribution, visibility and site fidelity. Centuries of interactions with humans through harvest, conflicts with fisheries or more recently tourism have given t ...
Ecosystem change and stability over multiple decades in the
... such as carbon capture and release). Although changes in Arctic ecosystems have been documented [4–11], attribution to a particular driver remains uncertain in some cases [12,13]. This is because of the multiple co-occurring drivers and also because any one driver such as climate warming can act on ...
... such as carbon capture and release). Although changes in Arctic ecosystems have been documented [4–11], attribution to a particular driver remains uncertain in some cases [12,13]. This is because of the multiple co-occurring drivers and also because any one driver such as climate warming can act on ...
Print
... shown that it tends to feed heavily during its fall migration and in the winter, and less during the spring and summer. It also tends to rely on different food sources at different times throughout the year. In the summer, cod and squid are the most common food items, while during the winter, more G ...
... shown that it tends to feed heavily during its fall migration and in the winter, and less during the spring and summer. It also tends to rely on different food sources at different times throughout the year. In the summer, cod and squid are the most common food items, while during the winter, more G ...
A unique assemblage of epibenthic sessile suspension feeders with
... 2002), and this pattern is largely determined by iceberg scour (Gutt and Starmans, 1998). In the Weddell Sea this community ranges over depths from ca. 70 m down to about 400 m, and lives well within the zone of iceberg scour. These benthic communities display a key characteristic that differentiate ...
... 2002), and this pattern is largely determined by iceberg scour (Gutt and Starmans, 1998). In the Weddell Sea this community ranges over depths from ca. 70 m down to about 400 m, and lives well within the zone of iceberg scour. These benthic communities display a key characteristic that differentiate ...
Chapter 3
... times due to a continuous westward drift of the Americas and sea levels fluctuations. During the Pliocene (2-5 mya) Central America arose connecting North and South America (which were isolated for many million years). This event produced a phenomenon known as “the great american biotic interchange” ...
... times due to a continuous westward drift of the Americas and sea levels fluctuations. During the Pliocene (2-5 mya) Central America arose connecting North and South America (which were isolated for many million years). This event produced a phenomenon known as “the great american biotic interchange” ...
are antarctic minke whales unusually abundant?
... depths as larger whales. Lastly, the minke whale population could be limited by factors other than food ...
... depths as larger whales. Lastly, the minke whale population could be limited by factors other than food ...
Effects of elevated CO2 on keystone herbivores in modern Arctic
... population densities, keystone herbivores exert strong top-down influences on forage plants that can lead to runaway consumption and destruction of the arctic vegetation (Jefferies 1997; Jefferies 1999; Handa et al. 2002). In contrast, at lower herbivore population densities, resources available to ...
... population densities, keystone herbivores exert strong top-down influences on forage plants that can lead to runaway consumption and destruction of the arctic vegetation (Jefferies 1997; Jefferies 1999; Handa et al. 2002). In contrast, at lower herbivore population densities, resources available to ...
1 Delphinapterus leucas (Pallas, 1776) English: White whale
... Chukchi Seas. Richard et al. (2001b) satellite-tagged beluga whales of the eastern Beaufort Sea during summer and autumn between 1993 and 1997. Whales occupied the Mackenzie estuary intermittently and for only a few days at a time. They spent much of their time off-shore, near or beyond the shelf br ...
... Chukchi Seas. Richard et al. (2001b) satellite-tagged beluga whales of the eastern Beaufort Sea during summer and autumn between 1993 and 1997. Whales occupied the Mackenzie estuary intermittently and for only a few days at a time. They spent much of their time off-shore, near or beyond the shelf br ...
Photosynthesis in Extreme Environments
... When we think of extremophiles, prokaryotes come to mind first. Thomas Brock’s pioneering studies of extremophiles carried out in Yellowstone’s hydrothermal environments, set the focus of life in extreme environments on prokaryotes and their metabolisms (Brock, 1978). However, eukaryotic microbial l ...
... When we think of extremophiles, prokaryotes come to mind first. Thomas Brock’s pioneering studies of extremophiles carried out in Yellowstone’s hydrothermal environments, set the focus of life in extreme environments on prokaryotes and their metabolisms (Brock, 1978). However, eukaryotic microbial l ...
Cytotoxic Activity of Antarctic Benthic Organisms - e
... A new methodology based in a standardized protocol was adopted for this species. Bioassays were performed at Deception Island (South Shetland Islands) during the Austral Summers of 2008-2009 and 2009-2010, using ether extracts at different concentrations from different benthic organisms collected in ...
... A new methodology based in a standardized protocol was adopted for this species. Bioassays were performed at Deception Island (South Shetland Islands) during the Austral Summers of 2008-2009 and 2009-2010, using ether extracts at different concentrations from different benthic organisms collected in ...
Herbivory and the Circumpolar Biodiversity Monitoring Program
... Arctic Council, published October 2013. • Implementation started in 2014, first meeting held in Akureyri, Iceland February 2014. • Next TSG meeting, Ottawa Canada, Feb 2015. • Rotating TSG chair. Currently Chaired by Canada (2014 – 2015). Sweden is incoming Chair (2015 – 2016). ...
... Arctic Council, published October 2013. • Implementation started in 2014, first meeting held in Akureyri, Iceland February 2014. • Next TSG meeting, Ottawa Canada, Feb 2015. • Rotating TSG chair. Currently Chaired by Canada (2014 – 2015). Sweden is incoming Chair (2015 – 2016). ...
Chordata: Birds / Mammals penguins, marine mammals
... Antarctic Research Series 11:227-261, 1967; 1: Antarctic Journal of the United States 30(5):232-234, 1987; 2: Science 288(5463):133-136, April 7 2000 3: Adaptations within Antarctic Ecosystems, Proceedings of the Third SCAR Symposium on Antarctic Biology. GA Llano, ed. Washington, DC: Smithsonian In ...
... Antarctic Research Series 11:227-261, 1967; 1: Antarctic Journal of the United States 30(5):232-234, 1987; 2: Science 288(5463):133-136, April 7 2000 3: Adaptations within Antarctic Ecosystems, Proceedings of the Third SCAR Symposium on Antarctic Biology. GA Llano, ed. Washington, DC: Smithsonian In ...