Trophic cascades from wolves to grizzly bears or changing abundance of bears and alternate foods?
In ‘Trophic cascades from wolves to grizzly bears in Yellowstone’, Ripple et al. (2014) hypothesize that a wolf (Canis lupus)-caused trophic cascade has resulted in increased consumption of fruit by grizzly bears (Ursus arctos) in Yellowstone National Park (YNP). The authors proposed that in the abs...
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ftunivnebraskali:oai:digitalcommons.unl.edu:usgsnpwrc-1283 2023-11-12T04:15:36+01:00 Trophic cascades from wolves to grizzly bears or changing abundance of bears and alternate foods? Barber-Meyer, Shannon M. 2015-01-01T08:00:00Z application/pdf https://digitalcommons.unl.edu/usgsnpwrc/283 https://digitalcommons.unl.edu/context/usgsnpwrc/article/1283/viewcontent/Barber_Meyer_JAE_2015_Trophic_cascades.pdf unknown DigitalCommons@University of Nebraska - Lincoln https://digitalcommons.unl.edu/usgsnpwrc/283 https://digitalcommons.unl.edu/context/usgsnpwrc/article/1283/viewcontent/Barber_Meyer_JAE_2015_Trophic_cascades.pdf USGS Northern Prairie Wildlife Research Center Canis lupus grizzly bear scat serviceberry study design trophic cascades Ursus arctos wolf Yellowstone text 2015 ftunivnebraskali 2023-10-30T09:52:20Z In ‘Trophic cascades from wolves to grizzly bears in Yellowstone’, Ripple et al. (2014) hypothesize that a wolf (Canis lupus)-caused trophic cascade has resulted in increased consumption of fruit by grizzly bears (Ursus arctos) in Yellowstone National Park (YNP). The authors proposed that in the absence of wolves, competition between grizzly bears and elk (Cervus elaphus) for berryproducing shrubs, along with high elk numbers, resulted in decreased fruit availability to grizzly bears. They further hypothesized that post-wolf reintroduction (with a subsequently reduced elk population), there would be an increase in the establishment of berry-producing shrubs and fruit availability to grizzly bears and an increase in the percentage of fruit in grizzly bear diets (Ripple et al. 2014). However, for a variety of reasons, the comparisons Ripple et al. (2014) used to demonstrate increased fruit availability and consumption by grizzly bears post-wolf reintroduction are flawed and tenuous at best. Importantly, a more parsimonious hypothesis, not sufficiently considered by Ripple et al. (2014), exists and is better supported by currently available data I review here. Text Canis lupus Ursus arctos University of Nebraska-Lincoln: DigitalCommons@UNL |
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University of Nebraska-Lincoln: DigitalCommons@UNL |
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Canis lupus grizzly bear scat serviceberry study design trophic cascades Ursus arctos wolf Yellowstone |
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Canis lupus grizzly bear scat serviceberry study design trophic cascades Ursus arctos wolf Yellowstone Barber-Meyer, Shannon M. Trophic cascades from wolves to grizzly bears or changing abundance of bears and alternate foods? |
topic_facet |
Canis lupus grizzly bear scat serviceberry study design trophic cascades Ursus arctos wolf Yellowstone |
description |
In ‘Trophic cascades from wolves to grizzly bears in Yellowstone’, Ripple et al. (2014) hypothesize that a wolf (Canis lupus)-caused trophic cascade has resulted in increased consumption of fruit by grizzly bears (Ursus arctos) in Yellowstone National Park (YNP). The authors proposed that in the absence of wolves, competition between grizzly bears and elk (Cervus elaphus) for berryproducing shrubs, along with high elk numbers, resulted in decreased fruit availability to grizzly bears. They further hypothesized that post-wolf reintroduction (with a subsequently reduced elk population), there would be an increase in the establishment of berry-producing shrubs and fruit availability to grizzly bears and an increase in the percentage of fruit in grizzly bear diets (Ripple et al. 2014). However, for a variety of reasons, the comparisons Ripple et al. (2014) used to demonstrate increased fruit availability and consumption by grizzly bears post-wolf reintroduction are flawed and tenuous at best. Importantly, a more parsimonious hypothesis, not sufficiently considered by Ripple et al. (2014), exists and is better supported by currently available data I review here. |
format |
Text |
author |
Barber-Meyer, Shannon M. |
author_facet |
Barber-Meyer, Shannon M. |
author_sort |
Barber-Meyer, Shannon M. |
title |
Trophic cascades from wolves to grizzly bears or changing abundance of bears and alternate foods? |
title_short |
Trophic cascades from wolves to grizzly bears or changing abundance of bears and alternate foods? |
title_full |
Trophic cascades from wolves to grizzly bears or changing abundance of bears and alternate foods? |
title_fullStr |
Trophic cascades from wolves to grizzly bears or changing abundance of bears and alternate foods? |
title_full_unstemmed |
Trophic cascades from wolves to grizzly bears or changing abundance of bears and alternate foods? |
title_sort |
trophic cascades from wolves to grizzly bears or changing abundance of bears and alternate foods? |
publisher |
DigitalCommons@University of Nebraska - Lincoln |
publishDate |
2015 |
url |
https://digitalcommons.unl.edu/usgsnpwrc/283 https://digitalcommons.unl.edu/context/usgsnpwrc/article/1283/viewcontent/Barber_Meyer_JAE_2015_Trophic_cascades.pdf |
genre |
Canis lupus Ursus arctos |
genre_facet |
Canis lupus Ursus arctos |
op_source |
USGS Northern Prairie Wildlife Research Center |
op_relation |
https://digitalcommons.unl.edu/usgsnpwrc/283 https://digitalcommons.unl.edu/context/usgsnpwrc/article/1283/viewcontent/Barber_Meyer_JAE_2015_Trophic_cascades.pdf |
_version_ |
1782332881725554688 |