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- Title
Zooplankton Diversity and Correlations with Biotic and Abiotic Factors in Water Bodies in the Middle Danube River Basin, Hungary.
- Authors
Kalcheva, Hristina; Kiss, Anita; Dinka, Maria; Berczik, Árpad; Kalchev, Roumen; Ágoston-Szabó, Edit
- Abstract
Species composition and seasonal and spatial distribution of the crustacean zooplankton groups Cladocera and Copepoda were studied in two lake-type wetlands, the Mocskos-Danube and the Riha, and the Danube River at Mohács, located in the protected side of the Béda-Karapancsa National Park in the Middle Danube River, Hungary. The investigations were carried out from April to October in 2014. A total of 23 crustacean species were found, 17 Cladocera and six Copepoda. The species richness was the lowest in the river and the highest in the isolated Riha Lake. The total abundance, especially of some cladoceran species, was the highest in the connected Mocskos-Danube Lake in the spring during the high waters. Positive correlations of zooplankton with the organic carbon, temperature and total phosphorus were found. The correlation with chlorophyll-a was negative, indicating strong grazing pressure on the phytoplankton. The bacterioplankton, which had the highest abundance in the spring, during the flood in May, had a weak negative correlation with Copepoda and positive one with the attached bacteria, and with the alien species Eurytemora velox. Cladocera negatively affected only the medium-sized free-living bacteria. The macrophyte species Ceratophyllum demersum, better developed in Riha Lake, probably as a better competitor led to N- and P- limitations for the phytoplankton and bacterioplankton, and due to the isolation from the river these plankton communities had less development in Riha Lake compared to the Mocskos-Danube and Mohács sites.
- Subjects
DANUBE River; ZOOPLANKTON; BIOTIC communities; BODIES of water; INTRODUCED species
- Publication
Acta Zoologica Bulgarica, 2020, Vol 72, Issue 4, p677
- ISSN
0324-0770
- Publication type
Article