Mayfly response to different stress types in small and mid-sized lowland rivers.

摘要: Freshwater ecosystems are endangered worldwide by various human pressures, resulting in dramatic habitat and species loss. Many aquatic invertebrates respond to disturbances their habitat, mayflies among the most sensitive ones. Therefore, we investigated mayfly response anthropogenic at 46 study sites encompassing slightly heavily modified small mid-sized lowland streams rivers. Mayfly nymphs were sampled between April September 2016 using a benthos hand net. A total of 21 was recorded, with Cloeon dipterum (Linnaeus, 1761) being frequently recorded one. Nevertheless, taxa richness rather low per site, i.e., zero nine. Assemblage structure had high share lower reaches lentic (potamic littoral) elements, detritivores (gatherers/collectors active filter feeders). This indicates that hydromorphological alterations lead assemblage "potamisation" More related higher oxygen concentration water temperature, abundance vegetation organic carbon. Additionally, diversity negatively associated increasing intensive agriculture area catchment scale. confirms bio-indicative properties, sensitivity pollution, but also provides new data impacted environment. Those can be used for management protection activities rivers biota according requirements European Water Framework Directive.