NDLI: Characteristic of Lower Don aquatic ecosystem in late autumn

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Characteristic of Lower Don aquatic ecosystem in late autumn

Content Provider	Springer Nature Link
Author	Matishov, G. G. Stepan’yan, O. V. Har’kovskii, V. M. Startsev, A. V. Bulysheva, N. I. Semin, V. V. Soier, V. G. Kreneva, K. V. Glushchenko, G. Yu. Svistuva, L. D.
Copyright Year	2016
Abstract	Multidisciplinary studies were carried out in the Lower Don River in the low-water November of 2012. The studies showed relatively low concentrations of oil products (up to 2 MAC) and heavy metals (up to 1 MAC), which were likely due to the cessation of navigation in the river. However, copper concentration was found to be in excess of its MAC. The most polluted were found to be the port water areas of the cities of Volgodonsk, Ust’-Donetsk, and Semikarakorsk. The distribution of nutrients over streams is uneven: the Don water is poorer in nutrients than the waters of the Severskii Donets and the Manych are. Oxbows can serve as depots of organic matter, where it accumulates over longer periods than in the river. The residual manifestations of the summer–autumn blooming of blue-green algae, observed in shallows, the predominance of algae of divisions Cryptophyta and Bacillariophyta (typical representatives of winter planktonic algacenosis), and their low abundance suggest the transitional state of phytoplankton communities to autumn–winter season (pre-winter period). The species diversity and biomass of zooplankton were largest in the Don R. and lowest in the Severskii Donets R. The formation of zooplankton species composition shows the effect of the runoff from the Tsimlyanskoe Reservoir. An increase in the proportion of oligochaetes and invading species was recorded in the Don. The decrease in the diversity of benthos is attributed to natural factors, i.e., the decay of imago and thicket forms in autumn. The biomass of the soft (food) benthos is low because of the predominance of its small-size forms.
Starting Page	873
Ending Page	884
Page Count	12
File Format	PDF
ISSN	00978078
Journal	Water Resources
Volume Number	43
Issue Number	6
e-ISSN	1608344X
Language	English
Publisher	Pleiades Publishing
Publisher Date	2017-01-24
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Lower Don river ecosystem aquatic biota phytoplankton zooplankton zoobenthos ichthyofauna nutrients heavy metals oil products Hydrogeology Hydrology/Water Resources Waste Water Technology Water Pollution Control Water Management Aquatic Pollution
Content Type	Text
Resource Type	Article
Subject	Water Science and Technology

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