Jul
22
2008

New thinking on how to keep lakes healthy

Eutrophication: Agricultural run-off rich in fertilizers stimulates rampant growth of algae.
Eutrophication: Agricultural run-off rich in fertilizers stimulates rampant growth of algae.Courtesy NASA

Human populations effect lakes

Human sewage and fertilizer runoff effects the health of lakes. It often causes huge algal blooms, kills fish, and creates other problems.

Long term study of "cultural eutrophication" released

For 37 years researchers have examined the best ways to control this "cultural eutrophication" process of lakes by varying the levels of phosphorous and nitrogen added to the lake.

After completing one of the longest running experiments ever done on a lake, researchers from the University of Alberta, University of Minnesota and the Freshwater Institute, contend that nitrogen control, in which the European Union and many other jurisdictions around the world are investing millions of dollars, is not effective and in fact, may actually increase the problem of cultural eutrophication.

Time to rethink current practices for healthy lakes

"David Schindler, professor of ecology at the University of Alberta, and one of the leading water researchers in the world, wants to change current practice in controlling nitrogen runoff by stating that

"Controlling nitrogen does not correct the polluted lakes, and in fact, may actually aggravate the problem and make it worse."

This study done by the University of Alberta, University of Minnesota and the Freshwater Institute appears in the journal, Proceedings of the National Academy of Sciences.

Source: PhysOrg.com

Your Comments, Thoughts, Questions, Ideas

Anonymous's picture
Anonymous says:

awesome

posted on Fri, 02/13/2009 - 11:55am

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