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Last updated on April 19, 2014 at 9:20 EDT

Latest Mark Hebblewhite Stories

2013-08-21 14:26:33

A new paper co-written by UM associate professor Mark Hebblewhite details ecological changes caused by a loss of Arctic sea ice. The paper concludes that the loss of sea ice obviously will impact the marine food web and the marine mammals that depend on sea ice habitat. Other major ecological changes in adjacent land-based habitats and species also will occur because of warming oceans. The findings were published in the Aug. 2 issue of Science magazine. Wildlife species like the polar...

2005-08-01 16:33:05

Willow trees, riparian willow warblers and beaver dams once were bountiful in an area near the town of Banff, Alberta, Canada. But once wolves left this area, elk grew more plentiful, browsing heavily on young willows. Today, there is little trace of beavers, and sparrows have replaced the warblers in what is now a grassland meadow. These profound changes were driven by the absence of the wolf, a top predator. That's the compelling finding of the paper, "Human Activity mediates a Trophic...

2005-08-01 14:08:28

By Maggie Fox, Health and Science Correspondent WASHINGTON (Reuters) - The loss of once-plentiful wolves in a part of Canada's west allowed the elk population to mushroom, pushing out beavers and songbirds and showing the importance of top predators, Canadian researchers said on Monday. Although scientists have long noted that the loss of even one species can have profound effects, the report is one of the first large-scale studies to show clearly the widespread consequences of losing a...