Dear Sergey

Since streams and rivers are among the most endangered ecosystems worldwide there are urgent demands for comprehensive methodological approaches to evaluate the actual state of these ecosystems and to monitor their rate of changes]. Physical, chemical and bacteriological measurements commonly form the basis of monitoring, because they provide the complete spectrum of information for proper water management . However, in running waters, where changes in hydrology are rapid and difficult to estimate, they cannot reflect the integration of numerous environment factors and long-term sustainability of river ecosystems for their instantaneous nature. Aquatic organisms, such as diatoms and benthic macroinvertebrates [4-5], can serve as bioindicators to integrate their total environment and their responses to complex sets of environmental conditions. They offer the possibility to obtain an ecological overview of the current status of streams or rivers...

For more information, please find the bellow links:

http://www.sciencedirect.com/science/article/pii/S1878029610001970

https://www.fs.fed.us/rm/boise/AWAE/scientists/profiles/mccormick/LazorchakBioindicators2003.pdf

http://www.tandfonline.com/doi/full/10.1080/21553769.2016.1162753

Regards,

Ata