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Posted Tue Aug 28 2012: from ScienceDaily:
Loss of Predators in Northern Hemisphere Affecting Ecosystem Health http://apocadocs.com/s.pl?1346182832
A survey on the loss in the Northern Hemisphere of large predators, particularly wolves, concludes that current populations of moose, deer, and other large herbivores far exceed their historic levels and are contributing to disrupted ecosystems.... It found that the loss of major predators in forest ecosystems has allowed game animal populations to greatly increase, crippling the growth of young trees and reducing biodiversity. This also contributes to deforestation and results in less carbon sequestration, a potential concern with climate change.... Densities of large mammalian herbivores were six times greater in areas without wolves, compared to those in which wolves were present, the researchers concluded. They also found that combinations of predators, such as wolves and bears, can create an important synergy for moderating the size of large herbivore populations.
[Read more stories about: predator depletion, unintended consequences, ecosystem interrelationships]
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