Influence of the environmental factors on species diversity and quantitative development of zoobenthos  in the Neva Bay

E.V. Balushkina and M.S. Golubkov

Proceedings of the Zoological Institute RAS, 2018, 322(1): 50–65  ·  https://doi.org/10.31610/trudyzin/2018.322.1.50

Full text  

Abstract

Hydrochemical characteristics, primary production of plankton, taxonomic composition, species richness, species diversity and quantitative characteristics of the benthic fauna of the Neva Bay had been collected and analyzed at the end of July and the very beginning of August 2003–2012 by the method stepwise regression, calculated equations with a free constant. Effects of biotic and abiotic factors on the structural and functional characteristics of benthic communities in the Neva Bay were evaluated using multiregression analysis. Research period had been accompanied by revival of industry of Saint-Petersburg, construction of ports, active navigation, development of Sea facade and completion of the construction of the St. Petersburg Flood Prevention Facility Complex and a large-scale hydrotechnical works: building of a Marine Multifunctional Reloading Complex (MMRC) “Bronka” and approach fairway to it. Results of statistical analysis showed that the number of species and species diversity of bottom animals in the Neva Bay declined with increased primary production and chlorophyll a concentration. Analysis of the factors influencing the values of biomass of benthic animal communities shows that these characteristics increased with growing chlorophyll concentration. During the anthropogenic stress of 2006–2007, the existing links between the structural characteristics of the zoobenthos and the functional biotic characteristics of the Neva Bay were completely destroyed. Restoration period 2008–2012 was accompanied by an increase in the species richness and species diversity of zoobenthos to the level observed before anthropogenic stress.

Key words

anthropogenic stress, eutrophication, biodiversity, zoobenthos

Submitted December 20, 2017  ·  Accepted February 14, 2018  ·  Published March 23, 2018

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