Harpacticoida (Copepoda) of the northern East Sea (the Sea of Japan) and the southern Sea of Okhotsk: diversity, taxocenes, and biogeographical aspectsстатья
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Аннотация:Based on novel data and a literature review, an inventory of Harpacticoida from
the northern part of the East Sea and the southern part of Sea of Okhotsk is
compiled. A total of 151 species belonging to 70 genera and 26 families, of which
16 species are deemed to be new to science, are recognized from the region. Twelve
harpacticoid species assemblages are described from marine and brackish water
soft sediments and the phytal zone. Estuarine faunas were similar throughout the
East Sea and Sea of Okhotsk, both in species composition and dominant-taxon
structure. Conversely, the fauna of marine soft sediment and phytal zones differed
greatly throughout this region. This distinction may have been caused by
differences in dispersal rates or by differences in environmental conditions. The
distribution of littoral and sublittoral harpacticoids was determined primarily by
climatic factors and the temperature of surface waters. Three basic sub-regions
were distinguished within the survey area: Korean, which includes many tropical
taxa (39%) and a smaller amount (about 20%) of boreal taxa; Primorye, where
boreal and subarctic-arctic species (>40%) predominate, and representatives of the
tropical complex are rare (17%); and Soya, with a mix of tropical (22%) and boreal
(31%) faunal elements. The faunas of the Korean and the Primorye sub-regions are
distinct, whereas that of the Soya has intermediate features.