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Jeong H.G.,Planning Office for Marine Biodiversity Institute of Korea | Suh H.-L.,Chonnam National University | Lee W.,Hanyang University | Soh H.Y.,Chonnam National University
Ocean Science Journal | Year: 2014

We investigated the seasonal variation of the neustonic zooplankton community in the surface layer (above 30 cm in depth) of 16 stations in southern waters of Korea from April 2002 to April 2003. In the neustonic community, copepods accounted for 59% of total organisms, as the most predominant group, while other dominant groups were invertebrate larvae, cladocerans, tunicates and fish eggs. Pontellid copepods, a major group of neustonic zooplankton, showed a marked seasonal variation and displayed a significant positive correlation with temperature (P < 0.05). Fish eggs appeared from spring to early summer in the inshore waters while tunicates and oceanic copepods (Eucalanus spp. and Euchaeta spp.) were dominant in the offshore waters during high temperature periods. This suggests that the distribution pattern of the neustonic zooplankton is seasonally affected by the hydrological conditions of in- and offshore waters. The abundance of zooplankton was higher in the surface layer (<15 cm) than in the subsurface layer (15-30 cm), and was also higher at night than during the daytime. Of the dominant copepod families, the density of acartiid and pontellid copepods was higher in the surface layer than the subsurface layer. The density of acartiid and corycaeid copepods was significantly higher during daytime than nighttime. This indicates that the surface layer in temperate regions may provide a favorable habitat for neustonic copepods despite the dynamic environmental fluctuations. © KSO, KIOST and Springer 2014. Source


Hwang H.,Natural History Research Team | Kang J.,Natural History Research Team | Cho I.-Y.,Planning Office for Marine Biodiversity Institute of Korea | Kang D.-W.,Planning Office for Marine Biodiversity Institute of Korea | And 2 more authors.
Journal of Asia-Pacific Biodiversity | Year: 2014

This study was conducted to examine the benthic invertebrate fauna inhabiting in the subtidal zone in and around the islets of Namuseom and Bukhyeongjeseom off the coast of Busan by SCUBA diving in September 2013. As a consequence, it was confirmed that a total of 6 phyla, 14 classes, 20 orders, 46 families, and 73 species of zoobenthos inhabit in and around those islets. The total number of species surveyed by taxon during the study is 22 species of Arthropoda (30%), 20 species of Mollusca (27%), 15 species of Cnidaria (21%), 10 species of Echinodermata (14%), four species of Poridera (5%), and two species of Chordata. Copyright © 2014 National Science Museum of Korea (NSMK) and Korea National Arboretum (KNA). Source


Jeong H.G.,Planning Office for Marine Biodiversity Institute of Korea | Soh H.Y.,Chonnam National University | Suh H.-L.,Chonnam National University
Zootaxa | Year: 2014

The pontellid calanoid Labidocera rotunda Mori, 1929 is relatively widespread in the inshore surface waters of East Asia. In this study, some heteromorphic specimens have been observed with extreme morphological discrepancies in the female, including the genital double-somite, the second urosomite, the caudal rami, and the fifth leg. To evaluate the validity of species assignment of the morphological variants, we analyzed the DNA sequences of two mitochondrial genes, 16S rRNA and cytochrome oxidase subunit I (mtCOI). The specimens were collected in the Yellow Sea, the East China Sea and the East Sea (Sea of Japan) around Korea. They differed by <2.9% for mt16S rRNA and by 3.7%-4.7% for mtCOI, suggesting that they are conspecific despite their considerable morphological differences. In contrast, Labidocera japonica Mori, 1935, a morphologically similar species to L. rotunda, displayed interspecific variation of 6.1%-7.2% for mt16S rRNA and 15.1%-16.7% for mtCOI. Copyright © 2014 Magnolia Press. Source


Cho I.-Y.,Planning Office for Marine Biodiversity Institute of Korea | Kang D.-W.,Planning Office for Marine Biodiversity Institute of Korea | Kang J.,Natural History Research Team | Hwang H.,Natural History Research Team | And 3 more authors.
Journal of Asia-Pacific Biodiversity | Year: 2014

The biodiversity of benthic invertebrates in the intertidal and subtidal regions of Gapado, Beomseom, and Munseom islets was surveyed twice in May and September 2013 to study the state of biodiversity in Seogwipo, Jeju Island. As a result, a total of 77 species, 46 families, 25 orders, 14 classes, and nine phyla of benthic invertebrates were found. The species which were found, by taxon, consisted of the following: 26 species of Cnidaria (34%), 24 species of Mollusca (31%), seven species of Chordata (9%), six species of Arthropoda (8%), six species of Porifera (8%), five species of Echinodermata (7%), one species of Bryozoa (1%), one species of Annelida (1%), and one species of Ctenophora (1%). Copyright © 2014 National Science Museum of Korea (NSMK) and Korea National Arboretum (KNA). Source

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