Fauna of the Khobe-Yu River (Subarctic Urals) Bottom Invertebrate under the Conditions of Anthropogenic Impact

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.

Changes in the Bottom and Shore Fauna of the Middle Illinois River and its Connecting Lakes since 1913-1915 as a Result of the Increase, Southward, of Sewage Pollution

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.