Glagolev S.M.1*, Bykov Yu.S.2 2012. Cladocerans of rock pools on White Sea islands: no regional differences and inversed island biogeography // Arthropoda Selecta. Vol.21. No.2: 137–148 [in English].

1 Moscow South-West High School, Bakinskikh komissarov str. 3, build. 5, Moscow 119571, Russia.

*corresponding author, e-mail: sglagolev@yandex.ru

2 School of Biology, Moscow State University, Vorobyevy gory, Moscow 119899, Russia.

KEY WORDS: Cladocera, rock pools, species composition, regional differences, frequencies of occurrence, White Sea, islands, Kandalaksha Gulf.

ABSTRACT. We studied the species composition and the occurrence frequency of Cladocera in rock pools of the White Sea islands (Kandalaksha Gulf). In the course of our research 13 freshwater cladoceran species were identified, with occurrence frequency for nine of them exceeding 5%. Alonella excisa and Daphnia curvirostris were found in the White Sea rock pools for the first time. No differences in species composition were found between different archipelagos in study area. Plotted accumulation curves revealed that complete inventory of island cladoceran fauna requires sampling of 25–50 pools per island. Species richness does not correlate with either size of the island or its remoteness from the continent. It turned out that an island closest to the continent demonstrates the lowest species richness (three Cladocera species), which is consistent with data on continental pools from other studies. The reasons of such a depleted species richness are discussed.

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