Friday, September 4, 2009

New aquatic invader threatens western waters

While conservationists typically consider the primary threats to salmon and steelhead the "4 H's", Hatcheries, Harvest, Hydropower and Habitat, recent research has pointed to the threat of invasive species. The Northwest Power and Conservation Council has recently highlighted the threat of Quagga mussels, a relative of the notorious zebra mussel, as a potential invader of the Columbia River. In recent years they have been discovered in a number of western states, including the Colorado River basin. While there is no clear understanding of how these invaders may affect salmonids, their filter feeding is likely to cause significant alterations to the food web. See the CBB for more.

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