Habitat security and diets for recovery of Alberta grizzlies: lessons from coastal BC, Alaska and Yellowstone
Brown bears (Ursus arctos) in North America vary widely in their densities from a maximum of 550 bears /1000 km2 in coastal Alaska to less than 5 bears /1000 km2 for mountain bears in the north; this variation has been attributed to differences in food base. The impacts of security and perceived ris...
Main Authors: | , |
---|---|
Format: | Conference Object |
Language: | unknown |
Published: |
2010
|
Subjects: | |
Online Access: | http://insight.cumbria.ac.uk/id/eprint/1068/ |
id |
ftunivcumbria:oai:insight.cumbria.ac.uk:1068 |
---|---|
record_format |
openpolar |
spelling |
ftunivcumbria:oai:insight.cumbria.ac.uk:1068 2023-05-15T18:42:06+02:00 Habitat security and diets for recovery of Alberta grizzlies: lessons from coastal BC, Alaska and Yellowstone Gilbert, Barrie K. Nevin, Owen 2010-07-03 http://insight.cumbria.ac.uk/id/eprint/1068/ unknown Gilbert, Barrie K. and Nevin, Owen (2010) Habitat security and diets for recovery of Alberta grizzlies: lessons from coastal BC, Alaska and Yellowstone. In: 24th International Congress for Conservation Biology: Conservation for a Changing Planet, 3-7 July 2010, Edmonton, Alberta, Canada. (Unpublished) 599 Mammals 577 Ecology Conference or Workshop Item NonPeerReviewed 2010 ftunivcumbria 2022-10-06T22:24:39Z Brown bears (Ursus arctos) in North America vary widely in their densities from a maximum of 550 bears /1000 km2 in coastal Alaska to less than 5 bears /1000 km2 for mountain bears in the north; this variation has been attributed to differences in food base. The impacts of security and perceived risk on the exploitation of energy rich environments also have significant impacts on demographic rates within populations. Increasing the energy density of habitat has been identified as an important step in the restoration and maintenance of small brown bear populations in Europe and this is equally applicable to bear populations at risk in North America. Where bears persist at high densities they are in productive ecosystems, where protection has been of low productivity land populations which survive are marginal. Drawing on examples from Yellowstone, coastal British Columbia and Alaska we will present the case for using areas of enhanced habit security and energy density as source populations within a source-sink model of conservation of a species at the edge of its current range to halt the retreat of bears in Alberta. Conference Object Ursus arctos Alaska University of Cumbria: Insight |
institution |
Open Polar |
collection |
University of Cumbria: Insight |
op_collection_id |
ftunivcumbria |
language |
unknown |
topic |
599 Mammals 577 Ecology |
spellingShingle |
599 Mammals 577 Ecology Gilbert, Barrie K. Nevin, Owen Habitat security and diets for recovery of Alberta grizzlies: lessons from coastal BC, Alaska and Yellowstone |
topic_facet |
599 Mammals 577 Ecology |
description |
Brown bears (Ursus arctos) in North America vary widely in their densities from a maximum of 550 bears /1000 km2 in coastal Alaska to less than 5 bears /1000 km2 for mountain bears in the north; this variation has been attributed to differences in food base. The impacts of security and perceived risk on the exploitation of energy rich environments also have significant impacts on demographic rates within populations. Increasing the energy density of habitat has been identified as an important step in the restoration and maintenance of small brown bear populations in Europe and this is equally applicable to bear populations at risk in North America. Where bears persist at high densities they are in productive ecosystems, where protection has been of low productivity land populations which survive are marginal. Drawing on examples from Yellowstone, coastal British Columbia and Alaska we will present the case for using areas of enhanced habit security and energy density as source populations within a source-sink model of conservation of a species at the edge of its current range to halt the retreat of bears in Alberta. |
format |
Conference Object |
author |
Gilbert, Barrie K. Nevin, Owen |
author_facet |
Gilbert, Barrie K. Nevin, Owen |
author_sort |
Gilbert, Barrie K. |
title |
Habitat security and diets for recovery of Alberta grizzlies: lessons from coastal BC, Alaska and Yellowstone |
title_short |
Habitat security and diets for recovery of Alberta grizzlies: lessons from coastal BC, Alaska and Yellowstone |
title_full |
Habitat security and diets for recovery of Alberta grizzlies: lessons from coastal BC, Alaska and Yellowstone |
title_fullStr |
Habitat security and diets for recovery of Alberta grizzlies: lessons from coastal BC, Alaska and Yellowstone |
title_full_unstemmed |
Habitat security and diets for recovery of Alberta grizzlies: lessons from coastal BC, Alaska and Yellowstone |
title_sort |
habitat security and diets for recovery of alberta grizzlies: lessons from coastal bc, alaska and yellowstone |
publishDate |
2010 |
url |
http://insight.cumbria.ac.uk/id/eprint/1068/ |
genre |
Ursus arctos Alaska |
genre_facet |
Ursus arctos Alaska |
op_relation |
Gilbert, Barrie K. and Nevin, Owen (2010) Habitat security and diets for recovery of Alberta grizzlies: lessons from coastal BC, Alaska and Yellowstone. In: 24th International Congress for Conservation Biology: Conservation for a Changing Planet, 3-7 July 2010, Edmonton, Alberta, Canada. (Unpublished) |
_version_ |
1766231706211188736 |