WINTER BROWSING ON PINE AND BIRCH IN RELATION TO MOOSE POPULATION DENSITY
During a 10-year period we have studied the relationships between an enclosed moose (Alces alces) population of a known density (range 1.3-5.7 moose per km2) and browsing on Scots pine (Pinus sylvestris) and birch (Betula spp.). In this paper we focus on three aspects: 1) the percentage of pine stem...
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Lakehead University
1992
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ftjalces:oai:ojs.pkp.sfu.ca:article/1797 2024-06-16T07:33:09+00:00 WINTER BROWSING ON PINE AND BIRCH IN RELATION TO MOOSE POPULATION DENSITY Bergström, R. Vikberg, M. 1992-01-01 application/pdf http://alcesjournal.org/index.php/alces/article/view/1797 eng eng Lakehead University http://alcesjournal.org/index.php/alces/article/view/1797/1865 http://alcesjournal.org/index.php/alces/article/view/1797 Alces: A Journal Devoted to the Biology and Management of Moose; Alces Supplement 1 (1992); 127-131 2293-6629 0835-5851 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article 1992 ftjalces 2024-05-22T03:01:08Z During a 10-year period we have studied the relationships between an enclosed moose (Alces alces) population of a known density (range 1.3-5.7 moose per km2) and browsing on Scots pine (Pinus sylvestris) and birch (Betula spp.). In this paper we focus on three aspects: 1) the percentage of pine stems browsed, 2) browsing induced mortality of pine and 3) stem-breakage of pine and birch (Betula pendula) by moose. these aspects were studied on permanently marked plots and stems in two different stand types (8-15 years and 16-40 years old respectively). There was a significant correlation between moose density and the number of browsed Pines in the youngest stand type but not in the older stand type. Stem-breakage of the two tree species showed similar patterns over the years, although the frequency of breakage was considerably higher on birch than on pine. A sharp decline in stem-breakage of birch appeared some years before the moose density was decreased. Mortality of pine in the youngest stand type reached about two percent of the total number of stems. The highest accumulated mortality (≈8 %) over the ten year period was recorded on subdominant pines in the oldest stand type. Article in Journal/Newspaper Alces alces Alces (A Journal Devoted to the Biology and Management of Moose) |
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Open Polar |
collection |
Alces (A Journal Devoted to the Biology and Management of Moose) |
op_collection_id |
ftjalces |
language |
English |
description |
During a 10-year period we have studied the relationships between an enclosed moose (Alces alces) population of a known density (range 1.3-5.7 moose per km2) and browsing on Scots pine (Pinus sylvestris) and birch (Betula spp.). In this paper we focus on three aspects: 1) the percentage of pine stems browsed, 2) browsing induced mortality of pine and 3) stem-breakage of pine and birch (Betula pendula) by moose. these aspects were studied on permanently marked plots and stems in two different stand types (8-15 years and 16-40 years old respectively). There was a significant correlation between moose density and the number of browsed Pines in the youngest stand type but not in the older stand type. Stem-breakage of the two tree species showed similar patterns over the years, although the frequency of breakage was considerably higher on birch than on pine. A sharp decline in stem-breakage of birch appeared some years before the moose density was decreased. Mortality of pine in the youngest stand type reached about two percent of the total number of stems. The highest accumulated mortality (≈8 %) over the ten year period was recorded on subdominant pines in the oldest stand type. |
format |
Article in Journal/Newspaper |
author |
Bergström, R. Vikberg, M. |
spellingShingle |
Bergström, R. Vikberg, M. WINTER BROWSING ON PINE AND BIRCH IN RELATION TO MOOSE POPULATION DENSITY |
author_facet |
Bergström, R. Vikberg, M. |
author_sort |
Bergström, R. |
title |
WINTER BROWSING ON PINE AND BIRCH IN RELATION TO MOOSE POPULATION DENSITY |
title_short |
WINTER BROWSING ON PINE AND BIRCH IN RELATION TO MOOSE POPULATION DENSITY |
title_full |
WINTER BROWSING ON PINE AND BIRCH IN RELATION TO MOOSE POPULATION DENSITY |
title_fullStr |
WINTER BROWSING ON PINE AND BIRCH IN RELATION TO MOOSE POPULATION DENSITY |
title_full_unstemmed |
WINTER BROWSING ON PINE AND BIRCH IN RELATION TO MOOSE POPULATION DENSITY |
title_sort |
winter browsing on pine and birch in relation to moose population density |
publisher |
Lakehead University |
publishDate |
1992 |
url |
http://alcesjournal.org/index.php/alces/article/view/1797 |
genre |
Alces alces |
genre_facet |
Alces alces |
op_source |
Alces: A Journal Devoted to the Biology and Management of Moose; Alces Supplement 1 (1992); 127-131 2293-6629 0835-5851 |
op_relation |
http://alcesjournal.org/index.php/alces/article/view/1797/1865 http://alcesjournal.org/index.php/alces/article/view/1797 |
_version_ |
1802012710489030656 |