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Friday, May 10, 2013

Human impacts on natural world underestimated

Human impacts on natural world underestimated
Calgary, Canada (SPX) May 10, 2013 - A comprehensive five-year study by University of Calgary ecologists - which included monitoring the activity of wolves, elks, cattle and humans - indicates that two accepted principles of how ecosystems naturally operate could be overshadowed by the importance of human activity. "Understanding the significance of the impact that humans have on ecosystems is a critical component in formulat ... morehttp://www.terradaily.com/reports/Human_impacts_on_natural_world_underestimated_999.html

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