Variations in plant forage quality in the range of the Porcupine caribou herd
Understanding potential impacts of vegetation change on caribou energetics requires information on variations in forage quality among different plant types and over time. We synthesized data on forage quality (nitrogen, neutral detergent fiber and dry matter digestibility) for 10 plant growth forms...
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Septentrio Academic Publishing
2002
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ftunitroemsoe:oai:ojs.henry.ub.uit.no:article/693 2023-05-15T14:58:31+02:00 Variations in plant forage quality in the range of the Porcupine caribou herd Johnstone, Jill Russell, Donald E. Griffith, Brad 2002-06-01 application/pdf https://septentrio.uit.no/index.php/rangifer/article/view/693 https://doi.org/10.7557/2.22.1.693 eng eng Septentrio Academic Publishing https://septentrio.uit.no/index.php/rangifer/article/view/693/658 https://septentrio.uit.no/index.php/rangifer/article/view/693 doi:10.7557/2.22.1.693 Copyright (c) 2015 Jill Johnstone, Donald E. Russell, Brad Griffith http://creativecommons.org/licenses/by/3.0/ CC-BY Rangifer; Årg 22 Nr 1 (2002); 83-91 Rangifer; Vol 22 No 1 (2002); 83-91 1890-6729 caribou forage Porcupine herd Arctic National Wildlife Refuge digestibility neutral detergent fiber nitrogen plant growth forms range ecology tundra info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2002 ftunitroemsoe https://doi.org/10.7557/2.22.1.693 2021-08-16T14:34:51Z Understanding potential impacts of vegetation change on caribou energetics requires information on variations in forage quality among different plant types and over time. We synthesized data on forage quality (nitrogen, neutral detergent fiber and dry matter digestibility) for 10 plant growth forms from existing scientific literature and from field research in the Arctic National Wildlife Refuge, Alaska. These data describe forage quality of plant species in habitats found within the summer and winter range of the Porcupine caribou herd in northwestern Canada and northern Alaska, U.S.A. We compared mean levels of summer forage quality among growth forms and, where possible, estimated seasonal changes in forage quality. Preferred forage groups (deciduous shrubs, forbs, and cottongrass flowers) had higher nitrogen and digestibility, and lower fiber content, than other growth forms. Nitrogen concentration in green biomass peaked at the onset of the growing season in forbs and deciduous shrubs, whereas graminoids reached peak nitrogen concentrations approximately 15-30 days after growth initiation. In vitro dry matter digestibility (IVDMD) and concentration of neutral detergent fiber (NDF) of green biomass differed among growth forms, but did not show strong seasonal changes. IVDMD and NDF concentrations were correlated with nitrogen concentrations in studies that had paired sampling. Article in Journal/Newspaper Arctic Rangifer Tundra Alaska Cottongrass University of Tromsø: Septentrio Academic Publishing Arctic Canada Rangifer 22 1 83 |
institution |
Open Polar |
collection |
University of Tromsø: Septentrio Academic Publishing |
op_collection_id |
ftunitroemsoe |
language |
English |
topic |
caribou forage Porcupine herd Arctic National Wildlife Refuge digestibility neutral detergent fiber nitrogen plant growth forms range ecology tundra |
spellingShingle |
caribou forage Porcupine herd Arctic National Wildlife Refuge digestibility neutral detergent fiber nitrogen plant growth forms range ecology tundra Johnstone, Jill Russell, Donald E. Griffith, Brad Variations in plant forage quality in the range of the Porcupine caribou herd |
topic_facet |
caribou forage Porcupine herd Arctic National Wildlife Refuge digestibility neutral detergent fiber nitrogen plant growth forms range ecology tundra |
description |
Understanding potential impacts of vegetation change on caribou energetics requires information on variations in forage quality among different plant types and over time. We synthesized data on forage quality (nitrogen, neutral detergent fiber and dry matter digestibility) for 10 plant growth forms from existing scientific literature and from field research in the Arctic National Wildlife Refuge, Alaska. These data describe forage quality of plant species in habitats found within the summer and winter range of the Porcupine caribou herd in northwestern Canada and northern Alaska, U.S.A. We compared mean levels of summer forage quality among growth forms and, where possible, estimated seasonal changes in forage quality. Preferred forage groups (deciduous shrubs, forbs, and cottongrass flowers) had higher nitrogen and digestibility, and lower fiber content, than other growth forms. Nitrogen concentration in green biomass peaked at the onset of the growing season in forbs and deciduous shrubs, whereas graminoids reached peak nitrogen concentrations approximately 15-30 days after growth initiation. In vitro dry matter digestibility (IVDMD) and concentration of neutral detergent fiber (NDF) of green biomass differed among growth forms, but did not show strong seasonal changes. IVDMD and NDF concentrations were correlated with nitrogen concentrations in studies that had paired sampling. |
format |
Article in Journal/Newspaper |
author |
Johnstone, Jill Russell, Donald E. Griffith, Brad |
author_facet |
Johnstone, Jill Russell, Donald E. Griffith, Brad |
author_sort |
Johnstone, Jill |
title |
Variations in plant forage quality in the range of the Porcupine caribou herd |
title_short |
Variations in plant forage quality in the range of the Porcupine caribou herd |
title_full |
Variations in plant forage quality in the range of the Porcupine caribou herd |
title_fullStr |
Variations in plant forage quality in the range of the Porcupine caribou herd |
title_full_unstemmed |
Variations in plant forage quality in the range of the Porcupine caribou herd |
title_sort |
variations in plant forage quality in the range of the porcupine caribou herd |
publisher |
Septentrio Academic Publishing |
publishDate |
2002 |
url |
https://septentrio.uit.no/index.php/rangifer/article/view/693 https://doi.org/10.7557/2.22.1.693 |
geographic |
Arctic Canada |
geographic_facet |
Arctic Canada |
genre |
Arctic Rangifer Tundra Alaska Cottongrass |
genre_facet |
Arctic Rangifer Tundra Alaska Cottongrass |
op_source |
Rangifer; Årg 22 Nr 1 (2002); 83-91 Rangifer; Vol 22 No 1 (2002); 83-91 1890-6729 |
op_relation |
https://septentrio.uit.no/index.php/rangifer/article/view/693/658 https://septentrio.uit.no/index.php/rangifer/article/view/693 doi:10.7557/2.22.1.693 |
op_rights |
Copyright (c) 2015 Jill Johnstone, Donald E. Russell, Brad Griffith http://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.7557/2.22.1.693 |
container_title |
Rangifer |
container_volume |
22 |
container_issue |
1 |
container_start_page |
83 |
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1766330660540121088 |