bottom invertebrate
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The article presents the results of investigations of gold alluvial deposits quarry mining impact upon a Subarctic Urals small mountain river zoobenthos. Deterioration of qualitative and quantitative characteristics of bottom invertebrate communities in the regions located downstream of mining sites.


1921 ◽  
Vol 14 (1-10) ◽  
pp. 33-75 ◽  
Author(s):  
Robert Richardson

The following short account of the principal changes that have occurred both in the composition and abundance of the small bottom-invertebrate fauna of the Illinois River system between Chillicothe and Browning since 1913-1915, these points being respectively 146.5 and 229.5 miles below the mouth of the Chicago River-is based on hauls made in July, August, and September, 1920, with the Petersen quantitative bottom- sampler at seventy-one stations in the river and Peoria Lake between Chillicothe and the head of Grand Island, and at twenty-five stations in five of the more important bottom-land lakes in the neighborhood of Havana.


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