Water Level in a Shallow Highly Eutrophic Lake: Development Factor by Macrophyte or Phytoplankton Type: Case Study of Lake Nero, Yaroslavl Oblast


Cite item

Full Text

Open Access Open Access
Restricted Access Access granted
Restricted Access Subscription Access

Abstract

Long-term dynamics of water level in Lake Nero (1930–2011) has been analyzed. Pronounced trends, determined by the climate and anthropogenic components have been identified. Up to the 1970s, at a drop in lake water level, the ecosystem still showed the main features of a shallow water body overgrown with macrophytes. Water level rise caused a more intense development of phytoplankton, an increase in biogenic element concentrations, a decrease in water transparency and the contribution of cyanobacteria of S1 codon; pondweed disappeared almost completely. Step-by-step regression analysis of phytoplankton development indices and hydrological characteristics showed that water transparency in Lake Nero depends by 80% directly on water exchange and inversely on the concentration of chlorophyll a in seston. The main hypothesis of the study was confirmed: the key trigger in phytoplankton–macrophytes competition is water level rise.

About the authors

O. V. Babanazarova

Yaroslavl State University

Author for correspondence.
Email: baba@bio.uniyar.ac.ru
Russian Federation, Yaroslavl, 150057

S. I. Sidelev

Yaroslavl State University

Email: baba@bio.uniyar.ac.ru
Russian Federation, Yaroslavl, 150057

S. M. Zhdanova

Institute of Inland Water Biology

Email: baba@bio.uniyar.ac.ru
Russian Federation, Borok, Yaroslavl oblast, 152742

A. S. Litvinov

Institute of Inland Water Biology

Email: baba@bio.uniyar.ac.ru
Russian Federation, Borok, Yaroslavl oblast, 152742

A. S. Ovseenko

Yaroslavl State University

Email: baba@bio.uniyar.ac.ru
Russian Federation, Yaroslavl, 150057

K. P. Korovkina

Yaroslavl State University

Email: baba@bio.uniyar.ac.ru
Russian Federation, Yaroslavl, 150057

Supplementary files

Supplementary Files
Action
1. JATS XML

Copyright (c) 2018 Pleiades Publishing, Ltd.