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Terrestrial trophic dynamics in the Canadian Arctic

Krebs, CJ; Danell, K; Angerbjörn, A; Agrell, Jep LU ; Berteaux, D; Bråthen, KA; Danell, O; Erlinge, Sam LU ; Fedorov, V and Fredga, K, et al. (2003) In Canadian Journal of Zoology 81(5). p.827-843
Abstract
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... (More)
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. (Less)
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published
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in
Canadian Journal of Zoology
volume
81
issue
5
pages
827 - 843
publisher
National Research Council Canada
external identifiers
  • wos:000183980600009
  • scopus:0041569933
ISSN
1480-3283
DOI
10.1139/Z03-061
language
English
LU publication?
yes
id
67d7a399-c182-4975-9a14-65e89d8be406 (old id 137234)
alternative location
http://pubs.nrc-cnrc.gc.ca/cgi-bin/rp/rp2_abst_e?cjz_z03-061_81_ns_nf_cjz5-03
date added to LUP
2007-06-25 12:11:39
date last changed
2018-09-30 03:33:33
@article{67d7a399-c182-4975-9a14-65e89d8be406,
  abstract     = {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.},
  author       = {Krebs, CJ and Danell, K and Angerbjörn, A and Agrell, Jep and Berteaux, D and Bråthen, KA and Danell, O and Erlinge, Sam and Fedorov, V and Fredga, K and Hjälten, J and Högstedt, G and Jonsdottir, IS and Kenney, AJ and Kjellén, Nils and Nordin, T and Roininen, H and Svensson, M and Tannerfeldt, M and Wiklund, C},
  issn         = {1480-3283},
  language     = {eng},
  number       = {5},
  pages        = {827--843},
  publisher    = {National Research Council Canada},
  series       = {Canadian Journal of Zoology},
  title        = {Terrestrial trophic dynamics in the Canadian Arctic},
  url          = {http://dx.doi.org/10.1139/Z03-061},
  volume       = {81},
  year         = {2003},
}