Distribution and Population Dynamics of the Highly Halotolerant Species Eucypris mareotica (Fischer, 1855) (Crustacea, Ostracoda) in Hypersaline Lakes of Crimea
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The distribution and population dynamics of Ostracoda and their response to environmental factors have been analyzed in Crimean hypersaline lakes based on data from a long-term monitoring study (2005–2016). Only one representative of this class, Eucypris mareotica (Fischer, 1855), occurs in these lakes. The species was recorded in the Crimean lakes at a maximum salinity of 300 g/L. The frequency of occurrence of this species correlated negatively with salinity. This species reached high abundances in plankton (650 000 ind./m3), benthos (565 000 ind./m2), and floating mats of filamentous green algae Cladophora spp. (9 900 000 ind./kg of wet weight of the mat). Ostracods were shown to reduce the concentration of calcium and magnesium in the water as a result of using these elements for the construction of their shells. The possibility of using the shells of ostracods for paleoclimatic and palaeolimnological reconstructions was discussed.
Keywords:Ostracoda population dynamics calcium cycle magnesium cycle hypersaline lakes Crimea
We sincerely thank E.A. Galagovets for his help in processing samples and our reviewer for valuable comments which greatly improved our paper.
Our studies were performed as part as the state assignment of the Kovalevsky Institute of Marine Biological Research, Russian Academy of Sciences (No. AAAA-A18-118021490093-4), with partial financial support from the Otto Kinne Foundation for E.V. Anufriieva.
COMPLIANCE WITH ETHICAL STANDARDS
Conflict of interests. The authors declare that they have no conflict of interest.
Statement on the welfare of animals. All applicable international, national, and/or institutional guidelines for the care and use of animals were followed.
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