Index Catalog // ScholarsArchive@OSU

Creator:: Wirsing, Aaron J. and Ripple, William J.
Abstract:: Marine and terrestrial ecologists rarely exchange information, yet comparing research from both sides of the land–sea boundary holds great potential for improving our understanding of ecological processes. For example, by comparing the interaction between tiger sharks (Galeocerdo cuvier) and dugongs (Dugong dugon) to that between gray wolves (Canis lupus) and...
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Full Text:: by prey Aaron J Wirsing and William J Ripple Front Ecol Environ 2010; doi:10.1890/090226

Creator:: Ripple, William J. and Beschta, Robert L.
Abstract:: There is a lack of scientific consensus about how top-down and bottom-up forces interact to structure terrestrial ecosystems. This is especially true for systems with large carnivore and herbivore species where the effects of predation versus food limitation on herbivores are controversial. Uncertainty exists whether top-down forces driven by large...
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Full Text:: Heuze P, Schnitzler A, Klein F (2005) Is browsing the major factor of silver fir decline in the 402

Creator:: Laliberte, Andrea S. and Ripple, William J.
Abstract:: The Lewis and Clark journals contain some of the earliest and most detailed written descriptions of a large part of the United States before Euro-American settlement.We used the journal entries to assess the influence of humans on wildlife distribution and abundance. Areas with denser human population, such as the Columbia...
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Full Text:: Author(s): ANDREA S. LALIBERTE and WILLIAM J. RIPPLE Source: BioScience, 53(10):994-1003. 2003. Published

Creator:: Ripple, William J. and Van Valkenburgh, Blaire
Abstract:: Humans, in conjunction with natural top-down processes and through a sequence of cascading trophic interactions, may have contributed to the Pleistocene megafaunal extinctions. The arrival of the first humans, as hunters and scavengers, through top-down forcing, could have triggered a population collapse of large herbivores and their predators. We present...
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Full Text:: Linking Top-down Forces to the Pleistocene Megafaunal Extinctions WILLIAM J. RIPPLE AND BLAIRE VAN

Creator:: Laliberte, Andrea S. and Ripple, William J.
Abstract:: We compared the historic and current geographical ranges of 43 North American carnivores and ungulates to identify large-scale patterns in range contractions and expansions. Seventeen of the species had experienced range contractions over more than 20% of their historic range. In areas of higher human influence, species were more likely...
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Full Text:: of North American Carnivores and Ungulates Author(s): ANDREA S. LALIBERTE and WILLIAM J. RIPPLE

Creator:: Ripple, William J. and Beschta, Robert L.
Abstract:: Aldo Leopold, perhaps best known for his revolutionary and poignant essays about nature, was also an eloquent advocate during the 1930s and 1940s of the need to maintain wolves and other large carnivores in forest and range ecosystems.He indicated that their loss set the stage for ungulate irruptions and ecosystem...
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Full Text:: Plants: Aldo Leopold on Trophic Cascades Author(s): WILLIAM J. RIPPLE and ROBERT L. BESCHTA Source

Creator:: Beschta, Robert L. and Ripple, William J.
Abstract:: Gray wolves (Canis lupus) were reintroduced into Yellowstone National Park in 1995-96, thus completing the park’s large predator guild. In the fall of 2010, approximately 15 years after wolf reintroduction, we sampled ten genera/species of berry-producing shrubs within 97 aspen (Populus tremuloides) stands in the park’s northern ungulate winter range....
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Full Text:: following wolf reintroduction in Yellowstone National Park Robert L. Beschta*, and William J. Ripple 1

Creator:: Ripple, William J. and Beschta, Robert L.
Abstract:: We investigated how large carnivores, herbivores, and plants may be linked to the maintenance of native species biodiversity through trophic cascades. The extirpation of wolves (Canis lupus) from Yellowstone National Park in the mid-1920s and their reintroduction in 1995 provided the opportunity to examine the cascading effects of carnivore–herbivore interactions...
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Full Text:: Ecology of Fear: Can Predation Risk Structure Ecosystems? Author(s): WILLIAM J. RIPPLE and ROBERT L

Creator:: Prugh, Laura R., Stoner, Chantal J., Epps, Clinton W., Bean, William T., Ripple, William J., Laliberte, Andrea S., and Brashares, Justin S.
Abstract:: Apex predators have experienced catastrophic declines throughout the world as a result of human persecution and habitat loss. These collapses in top predator populations are commonly associated with dramatic increases in the abundance of smaller predators. Known as “mesopredator release,” this trophic interaction has been recorded across a range of...
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Full Text:: Mesopredator Author(s): Laura R. Prugh, Chantal J. Stoner, Clinton W. Epps, William T. Bean, William J. Ripple

Creator:: Batchelor, Jonathan L., Ripple, William J., Wilson, Todd M., and Painter, Luke E.
Abstract:: We assessed the effects of the elimination of livestock in riparian systems at Hart Mountain National Antelope Refuge in southeastern Oregon, 23 years after the removal of cattle grazing, using 64 photos taken before grazing was removed compared with later retake photos. Two methods were used for this assessment: (1)...
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Full Text:: Following the Removal of Cattle in the Northwestern Great Basin Jonathan L. Batchelor • William J. Ripple

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