Abstract
The taxonomic structure and fauna of Cladocera of Lakes Lucimer and Pulemetske are presented. The main work was 243 samples collected by generally accepted methods of hydrobiology during 2013–2019. There are 24 species of Cladocera registered in the lakes, which belong to 4 orders (Haplopoda, Ctenopoda, Anomopoda, Onychopoda), 7 families (Leptodoridae, Sididae, Daphniidae, Moinidae, Bosminidae, Chydoridae, Polyphemidae), 17 genera (Leptodora, Diaphanosoma, Sida, Ceriodaphnia, Daphnia, Scapholeberis, Moina, Bosmina, Alonella, Chydorus, Pseudochydorus, Pleuroxus, Acroperus, Alona, Graptoleberis, Rhynchotalona, Polyphemus) and 6 subgenera (Daphnia, Moina, Exomoina, Bosmina, Eubosmina, Alonella). One tribe (Aloninae) and 4 subfamilies (Daphniinae, Scapholeberinae, Chydorinae, Aloninae) are distinguished in the structure of cladocerocenosis. The greatest taxonomic diversity belongs to the order Anomopoda (29 taxonomic units of superspecific rank). Taking this indicator into account, the Ctenopoda order is less diverse (3 taxonomic units of superspecific rank). The smallest diversity is characteristic of the Haplopoda and Onychopoda orders (2 taxonomic units of supraspecific rank). Taking into account the taxonomic units that characterize the rank of the genus, the most diverse family is Chydoridae. It includes 9 genera (Alonella, Chydorus, Pseudochydorus, Pleuroxus, Acroperus, Alona, Graptoleberis, Rhynchotalona). The family Daphniidae is characterized by a smaller diversity. It unites 3 genera: Ceriodaphnia, Daphnia, Scapholeberis, 4 families include only one genus each: Leptodoridae (genus Leptodora), Moinidae (genus Moina), Bosminidae (genus Bosmina), Polyphemidae (genus Polyphemus). The family Sididae unites 2 genera: Diaphanosoma and Sida. The 2 families contain 2 subfamilies each: Daphniidae (subfamilies Daphniinae and Scapholeberinae) and Chydoridae (subfamilies Chydorinae and Aloninae). The families Leptodoridae, Sididae, Moinidae, Bosminidae, Polyphemidae are not represented by subfamilies. The Chydoridae family is also represented by one tribe (Alonini). This taxonomic category unites related genera of this family (Acroperus, Alona, Graptoleberis, Rhynchotalona). In the lake Pulemetske 19 species have been registered. In the lake Lucimer 18 species have been registered. In the cladocerocenoses of the studied lakes, 13 species are common. Jaccard, Sørensen, and Mountford fauna similarity indices calculated for lake cladocerocenoses are 54, 70, and 13, respectively.
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