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Solar power development in US Southwest could threaten wildlife
Date:12/8/2011

Government agencies are considering scores of applications to develop utility-scale solar power installations in the desert Southwest of the United States, but too little is known to judge their likely effects on wildlife, according to an article published in the December 2011 issue of BioScience. Although solar power is often seen as a "green" energy technology, available information suggests a worrisome range of possible impacts. These concern wildlife biologists because the region is a hotspot of biodiversity and includes many endangered or protected species, notably Agassiz's desert tortoise. It and another tortoise, Morafka's, dig burrows that shelter many other organisms.

The article, by Jeffrey E. Lovich and Joshua R. Ennen of the US Geological Survey's Southwest Biological Science Center, notes that solar energy facilities are poised for rapid development and could cover hundreds of thousands of hectares. Assessments of their effects should count both onsite and offsite effects and include construction and decommissioning as well as the operational phase, the authors point out. Yet there are to date almost no peer-reviewed studies on the impacts of solar installations specifically.

The authors' initial attempt to catalogue the foreseeable effects draws attention to habitat fragmentation caused by roads and power lines, which could restrict gene flow, as well as the production of large amounts of dust through ground-disturbance. Solar plants are also expected to release pollutants such as dust suppressants, rust suppressants, and antifreeze, both in routine operation as well as through spills. They will predictably generate heat, electromagnetic fields, noise, polarized light, and possibly ignite fires. Evaporative ponds, which concentrate toxins, may be used and are a recognized hazard to wildlife. Because wet-cooled turbines need to be supplied with large amounts of water, developers are leaning toward using dry-cooled turbines,
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Contact: Tim Beardsley
tbeardsley@aibs.org
703-674-2500 x326
American Institute of Biological Sciences
Source:Eurekalert

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