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Title

A study of Eurasian watermilfoil, macroinvertebrates and fish in a Washington lake. Article in Journal of Aquatic Plant Management 49:71-82 (2011).

 
Publication number Date Published
12-03-017February 2012
VIEW NOW A study of Eurasian watermilfoil, macroinvertebrates and fish in a Washington lake. Article in Journal of Aquatic Plant Management 49:71-82 (2011). (Number of pages: 12) (Publication Size: 2MB)




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Author(s) Parsons, J.K., G.E. Marx, and M. Divens
Description A milfoil weevil augmentation project took place in Mattoon Lake in central Washington. We monitored aquatic plant growth, invertebrates associated with Eurasian watermilfoil, and the fish community. During the project Eurasian watermilfoil decreased significantly, and other aquatic plant species did not change or increased. The milfoil weevil took five years to establish, during which time a midge population controlled Eurasian milfoil growth. The fish community changed from domination by small sunfish to a balanced community of predator and prey fish. Fish diet analysis indicated that fish predation impacted herbivorous invertebrate populations. This study supports the theory that fish and herbivorous invertebrates influence lake food web interactions.
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Keywords macroinvertebrates, invertebrates, fish, water, lake, Eurasian watermilfoil, aquatic
WATERSHED Water Resource Inventory Area 39 Upper Yakima