Grazing by captive Barnacle geese affects graminoid growth and productivity on Svalbard
Migratory geese breed in Svalbard in summer and return to Western Europe for the winter, feeding on wetlands and agricultural fields. Recent changes in climate, land use and the implementation of protective measures dramatically improved the birds' ability to survive the winter, increasing popu...
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The University Centre in Svalbard (UNIS)/The University Centre in Svalbard (UNIS)/The University Centre in Svalbard (UNIS)
2006
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ftnipr:oai:nipr.repo.nii.ac.jp:00002505 2023-05-15T13:05:44+02:00 Grazing by captive Barnacle geese affects graminoid growth and productivity on Svalbard Cooper,Elisabeth J. Jonsdottir,Ingibjorg S. Pahud,Astrid 2006-03 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2505 http://id.nii.ac.jp/1291/00002505/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2505&item_no=1&attribute_id=18&file_no=1 en eng The University Centre in Svalbard (UNIS)/The University Centre in Svalbard (UNIS)/The University Centre in Svalbard (UNIS) https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2505 http://id.nii.ac.jp/1291/00002505/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 59, 1-15(2006-03) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2505&item_no=1&attribute_id=18&file_no=1 goose herbivory climatic warming compensation High Arctic tundra grasses Departmental Bulletin Paper P(論文) 2006 ftnipr 2022-11-12T19:43:20Z Migratory geese breed in Svalbard in summer and return to Western Europe for the winter, feeding on wetlands and agricultural fields. Recent changes in climate, land use and the implementation of protective measures dramatically improved the birds' ability to survive the winter, increasing population sizes and thus the potential grazing impact on Svalbard. This study measured live leaf length and aboveground productivity of Alopecurus borealis and Dupontia fisheri, widespread forage grasses on Svalbard, in order to make a quantitative assessment of the short term effects of different intensities of goose grazing. In addition we wanted to establish whether warming could enhance graminoid growth and regenerative capacity of grazed grasses. We carried out a factorial experiment of grazing (control, normal and high grazing pressure) using captive wild barnacle geese and temperature manipulation using open top chambers (OTCs) in a mesic and wet habitat in Adventdalen, Svalbard (78°N , 16°E ), following the growth of individual tillers before grazing and up until 20 days after grazing. OTCs enhanced temperatures and growth rates for Alopecurus in the mesic habitat, but slightly decreased belowground temperatures and early season growth for Dupontia in the wet habitat. Grazing stimulated growth rates resulting in increased cumulative leaf length production. The strength of response was greater for Alopecurus than Dupontia. We suggest that nutrients released by goose faeces were taken up by Alopecurus thus enhancing their growth rates, but that the thick layer of mosses prevented the addition of faeces from benefitting Dupontia as much. Report Adventdalen Arctic Dupontia fisheri Memoirs of National Institute of Polar Research Polar Research Svalbard Tundra National Institute of Polar Research Repository, Japan Arctic Svalbard Adventdalen ENVELOPE(16.264,16.264,78.181,78.181) |
institution |
Open Polar |
collection |
National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
topic |
goose herbivory climatic warming compensation High Arctic tundra grasses |
spellingShingle |
goose herbivory climatic warming compensation High Arctic tundra grasses Cooper,Elisabeth J. Jonsdottir,Ingibjorg S. Pahud,Astrid Grazing by captive Barnacle geese affects graminoid growth and productivity on Svalbard |
topic_facet |
goose herbivory climatic warming compensation High Arctic tundra grasses |
description |
Migratory geese breed in Svalbard in summer and return to Western Europe for the winter, feeding on wetlands and agricultural fields. Recent changes in climate, land use and the implementation of protective measures dramatically improved the birds' ability to survive the winter, increasing population sizes and thus the potential grazing impact on Svalbard. This study measured live leaf length and aboveground productivity of Alopecurus borealis and Dupontia fisheri, widespread forage grasses on Svalbard, in order to make a quantitative assessment of the short term effects of different intensities of goose grazing. In addition we wanted to establish whether warming could enhance graminoid growth and regenerative capacity of grazed grasses. We carried out a factorial experiment of grazing (control, normal and high grazing pressure) using captive wild barnacle geese and temperature manipulation using open top chambers (OTCs) in a mesic and wet habitat in Adventdalen, Svalbard (78°N , 16°E ), following the growth of individual tillers before grazing and up until 20 days after grazing. OTCs enhanced temperatures and growth rates for Alopecurus in the mesic habitat, but slightly decreased belowground temperatures and early season growth for Dupontia in the wet habitat. Grazing stimulated growth rates resulting in increased cumulative leaf length production. The strength of response was greater for Alopecurus than Dupontia. We suggest that nutrients released by goose faeces were taken up by Alopecurus thus enhancing their growth rates, but that the thick layer of mosses prevented the addition of faeces from benefitting Dupontia as much. |
format |
Report |
author |
Cooper,Elisabeth J. Jonsdottir,Ingibjorg S. Pahud,Astrid |
author_facet |
Cooper,Elisabeth J. Jonsdottir,Ingibjorg S. Pahud,Astrid |
author_sort |
Cooper,Elisabeth J. |
title |
Grazing by captive Barnacle geese affects graminoid growth and productivity on Svalbard |
title_short |
Grazing by captive Barnacle geese affects graminoid growth and productivity on Svalbard |
title_full |
Grazing by captive Barnacle geese affects graminoid growth and productivity on Svalbard |
title_fullStr |
Grazing by captive Barnacle geese affects graminoid growth and productivity on Svalbard |
title_full_unstemmed |
Grazing by captive Barnacle geese affects graminoid growth and productivity on Svalbard |
title_sort |
grazing by captive barnacle geese affects graminoid growth and productivity on svalbard |
publisher |
The University Centre in Svalbard (UNIS)/The University Centre in Svalbard (UNIS)/The University Centre in Svalbard (UNIS) |
publishDate |
2006 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2505 http://id.nii.ac.jp/1291/00002505/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2505&item_no=1&attribute_id=18&file_no=1 |
long_lat |
ENVELOPE(16.264,16.264,78.181,78.181) |
geographic |
Arctic Svalbard Adventdalen |
geographic_facet |
Arctic Svalbard Adventdalen |
genre |
Adventdalen Arctic Dupontia fisheri Memoirs of National Institute of Polar Research Polar Research Svalbard Tundra |
genre_facet |
Adventdalen Arctic Dupontia fisheri Memoirs of National Institute of Polar Research Polar Research Svalbard Tundra |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2505 http://id.nii.ac.jp/1291/00002505/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 59, 1-15(2006-03) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2505&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766392572927803392 |