wolves in northwestern Yellowstone National Park
Historical records indicate that gray wolves (Canis lupus) were extirpated from the upper Gallatin River Basin in the early 1900s. Following the removal of these large carnivores, elk (Cervis elaphus) began to increasingly browse streamside vegetation in the winter range, causing widespread loss of...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.529.4155 2023-05-15T15:50:34+02:00 wolves in northwestern Yellowstone National Park Robert L. Beschta The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.529.4155 http://www.cof.orst.edu/leopold/papers/gallatin_river_channels_bescheta_ripple_2006.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.529.4155 http://www.cof.orst.edu/leopold/papers/gallatin_river_channels_bescheta_ripple_2006.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.cof.orst.edu/leopold/papers/gallatin_river_channels_bescheta_ripple_2006.pdf trophic cascades channel morphology wolves elk Gallatin River *Correspondence to text ftciteseerx 2016-01-08T10:30:03Z Historical records indicate that gray wolves (Canis lupus) were extirpated from the upper Gallatin River Basin in the early 1900s. Following the removal of these large carnivores, elk (Cervis elaphus) began to increasingly browse streamside vegetation in the winter range, causing widespread loss of formerly extensive willow (Salix spp.) communities. Historical aerial photographs and chronosequences of ground photographs were used to characterize general changes in vegetation and channel morphology over time. In August of 2004, riparian vegetation and channel cross-sections were surveyed along three reaches of the upper Gallatin River. Reach A was located upstream of the elk winter range (control reach) whereas reaches B and C (treatment reaches) were located within the elk winter range. Willow cover on floodplains averaged 85 per cent for reach A, but only 26 per cent and 5 per cent for reaches B and C, respectively. The average return period of calculated bankfull discharges was 3·1 yrs for reach A but increased to 32·4 yrs and 10·6 yrs for reaches B and C, respectively. The long-term loss of streamside vegetation allowed channels to generally increase in hydraulic capacity (via increases in width, incision or both) and decrease their hydrologic connectivity Text Canis lupus Unknown |
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ftciteseerx |
language |
English |
topic |
trophic cascades channel morphology wolves elk Gallatin River *Correspondence to |
spellingShingle |
trophic cascades channel morphology wolves elk Gallatin River *Correspondence to Robert L. Beschta wolves in northwestern Yellowstone National Park |
topic_facet |
trophic cascades channel morphology wolves elk Gallatin River *Correspondence to |
description |
Historical records indicate that gray wolves (Canis lupus) were extirpated from the upper Gallatin River Basin in the early 1900s. Following the removal of these large carnivores, elk (Cervis elaphus) began to increasingly browse streamside vegetation in the winter range, causing widespread loss of formerly extensive willow (Salix spp.) communities. Historical aerial photographs and chronosequences of ground photographs were used to characterize general changes in vegetation and channel morphology over time. In August of 2004, riparian vegetation and channel cross-sections were surveyed along three reaches of the upper Gallatin River. Reach A was located upstream of the elk winter range (control reach) whereas reaches B and C (treatment reaches) were located within the elk winter range. Willow cover on floodplains averaged 85 per cent for reach A, but only 26 per cent and 5 per cent for reaches B and C, respectively. The average return period of calculated bankfull discharges was 3·1 yrs for reach A but increased to 32·4 yrs and 10·6 yrs for reaches B and C, respectively. The long-term loss of streamside vegetation allowed channels to generally increase in hydraulic capacity (via increases in width, incision or both) and decrease their hydrologic connectivity |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Robert L. Beschta |
author_facet |
Robert L. Beschta |
author_sort |
Robert L. Beschta |
title |
wolves in northwestern Yellowstone National Park |
title_short |
wolves in northwestern Yellowstone National Park |
title_full |
wolves in northwestern Yellowstone National Park |
title_fullStr |
wolves in northwestern Yellowstone National Park |
title_full_unstemmed |
wolves in northwestern Yellowstone National Park |
title_sort |
wolves in northwestern yellowstone national park |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.529.4155 http://www.cof.orst.edu/leopold/papers/gallatin_river_channels_bescheta_ripple_2006.pdf |
genre |
Canis lupus |
genre_facet |
Canis lupus |
op_source |
http://www.cof.orst.edu/leopold/papers/gallatin_river_channels_bescheta_ripple_2006.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.529.4155 http://www.cof.orst.edu/leopold/papers/gallatin_river_channels_bescheta_ripple_2006.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766385535526371328 |