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Terrestrial trophic...
Terrestrial trophic dynamics in the Canadian Arctic
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Krebs, C. J. (author)
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Danell, K. (author)
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Angerbjörn, A. (author)
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- Agrell, Jep (author)
- Lund University,Lunds universitet,Biologiska institutionen,Naturvetenskapliga fakulteten,Department of Biology,Faculty of Science
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Berteaux, D. (author)
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Brathen, K. A. (author)
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Danell, O. (author)
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- Erlinge, Sam (author)
- Lund University,Lunds universitet,Evolutionär ekologi,Biologiska institutionen,Naturvetenskapliga fakulteten,Evolutionary ecology,Department of Biology,Faculty of Science
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- Fedorov, V. (author)
- Uppsala universitet,Institutionen för evolutionsbiologi,Conservation Biology and Genetics
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- Fredga, Karl (author)
- Uppsala universitet,Institutionen för evolutionsbiologi,Conservation Biology and Genetics
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Hjalten, J. (author)
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Hogstedt, G. (author)
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Jonsdottir, I. S. (author)
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Kenney, A. J. (author)
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- Kjellén, Nils (author)
- Lund University,Lunds universitet,Biodiversitet,Biologiska institutionen,Naturvetenskapliga fakulteten,Biodiversity,Department of Biology,Faculty of Science
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Nordin, T. (author)
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Roininen, H. (author)
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Svensson, M. (author)
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Tannerfeldt, M. (author)
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Wiklund, C. (author)
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(creator_code:org_t)
- 2003
- 2003
- English.
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In: Canadian Journal of Zoology-Revue Canadienne De Zoologie. ; 81, s. 827-843
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Abstract
Subject headings
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- The Swedish Tundra Northwest Expedition of 1999 visited 17 sites throughout the Canadian Arctic. At 12 sites that were intensively sampled we estimated the standing crop of plants and the densities of herbivores and predators with an array of trapping, visual surveys, and faecal-pellet transects. We developed a trophic-balance model using ECOPATH to integrate these observations and determine the fate of primary and secondary production in these tundra ecosystems, which spanned an 8-fold range of standing crop of plants. We estimated that about 13% of net primary production was consumed by herbivores, while over 70% of small-herbivore production was estimated to flow to predators. Only 9% of large-herbivore production was consumed by predators. Organization of Canadian Arctic ecosystems appears to be more top-down than bottom-up. Net primary production does not seem to be herbivore-limited at any site. This is the first attempt to integrate trophic dynamics over the entire Canadian Arctic.
Subject headings
- NATURVETENSKAP -- Biologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences (hsv//eng)
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper -- Medicinsk genetik (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Basic Medicine -- Medical Genetics (hsv//eng)
Keyword
- HERD CASE-HISTORY
- PLANT-COMMUNITIES
- WOLF PREDATION
- FOOD WEBS
- CARIBOU
- VEGETATION
- ECOSYSTEM
- LEMMINGS
- HERBIVORES
- BIOMASS
- Clinical genetics
Publication and Content Type
- ref (subject category)
- art (subject category)
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To the university's database
- By the author/editor
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Krebs, C. J.
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Danell, K.
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Angerbjörn, A.
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Agrell, Jep
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Berteaux, D.
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Brathen, K. A.
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show more...
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Danell, O.
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Erlinge, Sam
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Fedorov, V.
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Fredga, Karl
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Hjalten, J.
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Hogstedt, G.
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Jonsdottir, I. S ...
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Kenney, A. J.
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Kjellén, Nils
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Nordin, T.
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Roininen, H.
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Svensson, M.
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Tannerfeldt, M.
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Wiklund, C.
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Biological Scien ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Biological Scien ...
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and Ecology
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- MEDICAL AND HEALTH SCIENCES
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MEDICAL AND HEAL ...
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and Basic Medicine
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and Medical Genetics
- Articles in the publication
- Canadian Journal ...
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Canadian Journal ...
- By the university
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Stockholm University
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Lund University
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Uppsala University