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Recommend “Terra Daily” - Severe drought, other changes can cause permanent ecosystem disruption (Email)

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Terra Daily

Corvallis, OR (SPX) Oct 17, 2011

http://www.terradaily.com/reports/Severe_drought_other_changes_can_cause_permanent_ecosystem_disruption_999.html

An eight-year study has concluded that increasingly frequent and severe drought, dropping water tables and dried-up springs have pushed some aquatic desert ecosystems into "catastrophic regime change," from which many species will not recover.

The findings, just published in the journal Freshwater Biology, raise concerns that climate change, over-pumping of aquifers for urban water use, and land management may permanently affect which species can survive. The research was supported by the National Science Foundation.

"Populations that have persisted for hundreds or thousands of years are now dying out," said David Lytle, an associate professor of zoology at Oregon State University. "Springs that used to be permanent are drying up. Streams that used to be perennial are now intermittent. And species that used to rise and fall in their populations are now disappearing."

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Recommend “Terra Daily” - Severe drought, other changes can cause permanent ecosystem disruption (Email)

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