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United States Department of Agriculture

Agricultural Research Service

ARS Photo Library

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Image Number D564-1

The small invertebrates being sampled by technician Lisa Williams and ecologist Charles Cooper are found in wetlands and ditches, where they are excellent indicators of the current quality of water and provide a way to measure improvements from in-field and edge-of-field conservation practices.

Photo by Peggy Greb.

640 pixels wide: (d564-1.jpg)

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Last Modified: 7/27/2006
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