L (2004) Trophic interactions in a High Arctic Snow Goose Colony. Integr Comp Biol 44:119–129 Gauthier G, Giroux J-F, Reed A, Béchet A, Bélanger L (2005) Interactions between land use, habitat use, and population increase in greater snow geese: what are
SYNOPSIS. We examined the role of trophic interactions in structuring a high arctic tundra community characterized by a large breeding colony of greater snow geese (Chen caerulescens atlantica). According to the exploitation ecosystem hypothesis of Oksanen et al. (1981), food chains are controlled b...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.539.3657 2023-05-15T13:19:53+02:00 L (2004) Trophic interactions in a High Arctic Snow Goose Colony. Integr Comp Biol 44:119–129 Gauthier G, Giroux J-F, Reed A, Béchet A, Bélanger L (2005) Interactions between land use, habitat use, and population increase in greater snow geese: what are Gilles Gauthier Line Rochefort The Pennsylvania State University CiteSeerX Archives 2006 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.539.3657 http://icb.oxfordjournals.org/content/44/2/119.full.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.539.3657 http://icb.oxfordjournals.org/content/44/2/119.full.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://icb.oxfordjournals.org/content/44/2/119.full.pdf text 2006 ftciteseerx 2016-01-08T10:57:35Z SYNOPSIS. We examined the role of trophic interactions in structuring a high arctic tundra community characterized by a large breeding colony of greater snow geese (Chen caerulescens atlantica). According to the exploitation ecosystem hypothesis of Oksanen et al. (1981), food chains are controlled by top-down interactions. However, because the arctic primary productivity is low, herbivore populations are too small to support functional predator populations and these communities should thus be dominated by the plant/ herbivore trophic-level interaction. Since 1990, we have been monitoring annual abundance and productivity of geese, the impact of goose grazing, predator abundance (mostly arctic foxes, Alopex lagopus) and the abundance of lemmings, the other significant herbivore in this community, on Bylot Island, Nunavut, Can-ada. Goose grazing consistently removed a significant proportion of the standing crop (;40%) in tundra wetlands every year. Grazing changed plant community composition and reduced the production of grasses and sedges to a low-level equilibrium compared to the situation where the presence of geese had been removed. Lemming cyclic fluctuations were strong and affected fox reproduction. Fox predation on goose eggs was severe and generated marked annual variation in goose productivity. Predation intensity on geese was closely related to the lemming cycle, a consequence of an indirect interaction between lemming and geese via shared predators. We conclude that, contrary to the exploitation ecosystem hypothesis, both the plant/herbivore and predator/prey interactions are significant in this arctic community. Text Alopex lagopus Arctic Bylot Island Nunavut Tundra Unknown Arctic Bylot Island Gauthier ENVELOPE(-63.583,-63.583,-64.833,-64.833) Nunavut |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
description |
SYNOPSIS. We examined the role of trophic interactions in structuring a high arctic tundra community characterized by a large breeding colony of greater snow geese (Chen caerulescens atlantica). According to the exploitation ecosystem hypothesis of Oksanen et al. (1981), food chains are controlled by top-down interactions. However, because the arctic primary productivity is low, herbivore populations are too small to support functional predator populations and these communities should thus be dominated by the plant/ herbivore trophic-level interaction. Since 1990, we have been monitoring annual abundance and productivity of geese, the impact of goose grazing, predator abundance (mostly arctic foxes, Alopex lagopus) and the abundance of lemmings, the other significant herbivore in this community, on Bylot Island, Nunavut, Can-ada. Goose grazing consistently removed a significant proportion of the standing crop (;40%) in tundra wetlands every year. Grazing changed plant community composition and reduced the production of grasses and sedges to a low-level equilibrium compared to the situation where the presence of geese had been removed. Lemming cyclic fluctuations were strong and affected fox reproduction. Fox predation on goose eggs was severe and generated marked annual variation in goose productivity. Predation intensity on geese was closely related to the lemming cycle, a consequence of an indirect interaction between lemming and geese via shared predators. We conclude that, contrary to the exploitation ecosystem hypothesis, both the plant/herbivore and predator/prey interactions are significant in this arctic community. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Gilles Gauthier Line Rochefort |
spellingShingle |
Gilles Gauthier Line Rochefort L (2004) Trophic interactions in a High Arctic Snow Goose Colony. Integr Comp Biol 44:119–129 Gauthier G, Giroux J-F, Reed A, Béchet A, Bélanger L (2005) Interactions between land use, habitat use, and population increase in greater snow geese: what are |
author_facet |
Gilles Gauthier Line Rochefort |
author_sort |
Gilles Gauthier |
title |
L (2004) Trophic interactions in a High Arctic Snow Goose Colony. Integr Comp Biol 44:119–129 Gauthier G, Giroux J-F, Reed A, Béchet A, Bélanger L (2005) Interactions between land use, habitat use, and population increase in greater snow geese: what are |
title_short |
L (2004) Trophic interactions in a High Arctic Snow Goose Colony. Integr Comp Biol 44:119–129 Gauthier G, Giroux J-F, Reed A, Béchet A, Bélanger L (2005) Interactions between land use, habitat use, and population increase in greater snow geese: what are |
title_full |
L (2004) Trophic interactions in a High Arctic Snow Goose Colony. Integr Comp Biol 44:119–129 Gauthier G, Giroux J-F, Reed A, Béchet A, Bélanger L (2005) Interactions between land use, habitat use, and population increase in greater snow geese: what are |
title_fullStr |
L (2004) Trophic interactions in a High Arctic Snow Goose Colony. Integr Comp Biol 44:119–129 Gauthier G, Giroux J-F, Reed A, Béchet A, Bélanger L (2005) Interactions between land use, habitat use, and population increase in greater snow geese: what are |
title_full_unstemmed |
L (2004) Trophic interactions in a High Arctic Snow Goose Colony. Integr Comp Biol 44:119–129 Gauthier G, Giroux J-F, Reed A, Béchet A, Bélanger L (2005) Interactions between land use, habitat use, and population increase in greater snow geese: what are |
title_sort |
l (2004) trophic interactions in a high arctic snow goose colony. integr comp biol 44:119–129 gauthier g, giroux j-f, reed a, béchet a, bélanger l (2005) interactions between land use, habitat use, and population increase in greater snow geese: what are |
publishDate |
2006 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.539.3657 http://icb.oxfordjournals.org/content/44/2/119.full.pdf |
long_lat |
ENVELOPE(-63.583,-63.583,-64.833,-64.833) |
geographic |
Arctic Bylot Island Gauthier Nunavut |
geographic_facet |
Arctic Bylot Island Gauthier Nunavut |
genre |
Alopex lagopus Arctic Bylot Island Nunavut Tundra |
genre_facet |
Alopex lagopus Arctic Bylot Island Nunavut Tundra |
op_source |
http://icb.oxfordjournals.org/content/44/2/119.full.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.539.3657 http://icb.oxfordjournals.org/content/44/2/119.full.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766350053638668288 |