Seasonal Effects on Ecological Status/Potential Assessment in Lakes Based on Macrozoobenthos

Emilia D. Varadinova*1,2, Marin A. Smilyanov1
 
1 - South-West University "Neofit Rilski", Faculty of Mathematics and Natural Sciences, Department Geography, Ecology and Environmental Protection, 66 Ivan Michailov St. 2700, Blagoevgrad, BULGARIA
2 - Institute of Biodiversity end Ecosystem Research, Department ofAquatic Ecosystems, Bulgarian Academy of Sciences, 2 Gagarin St. 1113 Sofia, BULGARIA
*Corresponding author: emily.varadinova@gmail.com
 
Abstract. Seasonal impact on the ecological status assessment through macrozoobenthos in representative lentic water bodies (lakes and dams) situated at Ecoregion 7 Eastern Balkans (South Bulgaria) was made. Data from twelve standing water bodies during three seasons (summer 2018, autumn 2018 and spring 2019) were analysed. The Total number of taxa index showed seasonal dependence. The Biotic index was not significantly changed across seasons in different types of stagnant waters. The seasonal effects on the ecological status/potential evaluation depended on the type of the standing water body (natural/heavily modified/artificial), environmental factors and different anthropogenic pressure which caused changes in the aquatic ecosystems.
 
Key words: macrozoobenthos, seasonality, ecological status/potential assessment.
 

Ecologia Balkanica, 2020, Volume 12, Issue 1 pp. 85-91
Article № eb.20121 [Full text - PDF]pdf

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