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Ecosystems

The Tale of The Great Lakes
February 9, 2010 05:44 PM - Andy Soos, ENN

The Great Lakes, as well as other aquatic systems, have seen the accidental import of many invasive species. Some, as it turns out, are stronger than the native forms which dramatically changes local conditions and not always for the good. Amidst the public battle over handling of the Asian carp threat in the Great Lakes, there is good news on the invasive species front. A New York State appellate court dismissed a challenge brought by shipping interests against the state’s tough new ballast water requirements, which are designed to limit the introduction of more invasive species into the Great Lakes. This is the second time that the state, with help from intervening Non-Government Organizations, has successfully defended the ballast water restrictions in court.

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/topics/ecosystems

Pesticides in California Rivers
February 3, 2010 01:34 PM - Andy Soos, ENN

Pyrethroids, which are among the most widely used home pesticides, are winding up in California rivers at levels toxic to some stream dwellers, possibly endangering the food supply of fish and other aquatic animals, according to a new study by researchers at the University of California, Berkeley, and Southern Illinois University. A pyrethroid is a synthetic chemical compound similar to the natural chemical pyrethrins produced by certain flowers(such as Chrysanthemum). Pyrethroids now constitute a major proportion of the synthetic insecticide market and are common in commercial products such as household insecticides. In the concentrations used in such products, they may also have insect repellent properties and are generally harmless to human beings but can harm sensitive individuals.

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SPOTLIGHT

Why Do Most People Feel Happier on the Weekend?

Editor, ENN
From construction laborers and secretaries to physicians and lawyers, people experience better moods, greater vitality, and fewer aches and pains from Friday evening to Sunday afternoon, concludes the first study of daily mood variation in employed adults to be published in the January 2010 issue of the Journal of Social and Clinical Psychology. And that 'weekend effect' is largely associated with the freedom to choose one's activities and the opportunity to spend time with loved ones, the research found.
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COMMENTARY

Biodiversity loss matters, and communication is crucial

David Dickson, Science and Development Network
Communicating why biodiversity loss matters for people is essential for reversing it. The failed UN climate talks in Copenhagen in December could hardly have been a less promising prelude to the International Year of Biodiversity, which opened last month (January). As with climate change, the threat of large-scale biodiversity loss — and the need for global political action to stop it — is growing every day.
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