caa a22 4500 445894512 CHVBK 20180317145627.0 cr unu---uuuuu 170323e20110501xx s 000 0 eng 10.1007/s10750-010-0095-0 doi (NATIONALLICENCE)springer-10.1007/s10750-010-0095-0 Species diversity and community structure of pelagic copepods in the marine lakes of Palau [Elektronische Daten] [Shin-ichi Saitoh, Hidekatsu Suzuki, Naoto Hanzawa, Hidetoshi Tamate] Community structure and diversity patterns of pelagic copepods were investigated for the coastal areas and in the marine lakes of the Palau islands in the West Pacific. We conducted field surveys during 2004-2007 and collected zooplankton samples from eight coastal areas and 16 marine lakes. The marine lakes in the islands of Palau are limnologically classified into two types, meromictic and holomictic lakes. Species diversity indices (Margalef's species richness d′, Shannon-Wiener index H′, and Simpson's dominance) were measured at each sampling site. The copepod community structure was analyzed using multivariate analyses, hierarchical cluster analysis, and non-metric multidimensional scaling (MDS) from the PRIMER package. A total of 36 copepod taxa were identified to the genus or species level from Calanoida, Cyclopoida, Harpacticoida, and Poecilostomatoida. Multivariate analysis based on the Bray-Curtis similarity index revealed that copepod assemblages could be classified into three different groups according to their habitat: (I) meromictic lakes, (II) holomictic lakes with an exceptionally shallow and flat basin (type A holomictic lakes), (III) holomictic lakes with a deep basin (type B holomictic lakes), and all coastal areas. The meromictic lakes were characterized by markedly decreased species diversity (d′=0.15, H′=0.41) in which only two brackish-water species, Bestiolina similis and Oithona dissimilis, were dominant. Type A holomictic lakes were characterized by relatively low levels of species diversity (d′=1.25, H′=1.35). In contrast, type B holomictic lakes were characterized by relatively high levels of species diversity, which was comparable to that of coastal areas. This result indicated that zooplankton assemblages in the type B holomictic lakes were closely related to a coastal community. The present study showed that the species diversity of pelagic copepods varies according to the level of isolation and the local environmental conditions for each marine lake. Springer Science+Business Media B.V., 2010 Copepod nationallicence Biodiversity nationallicence Community structure nationallicence Marine lakes nationallicence Palau nationallicence Cluster analysis nationallicence Saitoh Shin-ichi Graduate School of Science and Engineering, Yamagata University, Kojirakawa 1-4-12, 990-8560, Yamagata, Japan aut Suzuki Hidekatsu Faculty of Science and Engineering, Ishinomaki Senshu University, Minami-sakai, 986-8580, Ishinomaki, Japan aut Hanzawa Naoto Graduate School of Science and Engineering, Yamagata University, Kojirakawa 1-4-12, 990-8560, Yamagata, Japan aut Tamate Hidetoshi Graduate School of Science and Engineering, Yamagata University, Kojirakawa 1-4-12, 990-8560, Yamagata, Japan aut Hydrobiologia Springer Netherlands 666/1(2011-05-01), 85-97 0018-8158 666:1<85 2011 666 10750 https://doi.org/10.1007/s10750-010-0095-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10750-010-0095-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Saitoh Shin-ichi Graduate School of Science and Engineering, Yamagata University, Kojirakawa 1-4-12, 990-8560, Yamagata, Japan aut NATIONALLICENCE 700 1- Suzuki Hidekatsu Faculty of Science and Engineering, Ishinomaki Senshu University, Minami-sakai, 986-8580, Ishinomaki, Japan aut NATIONALLICENCE 700 1- Hanzawa Naoto Graduate School of Science and Engineering, Yamagata University, Kojirakawa 1-4-12, 990-8560, Yamagata, Japan aut NATIONALLICENCE 700 1- Tamate Hidetoshi Graduate School of Science and Engineering, Yamagata University, Kojirakawa 1-4-12, 990-8560, Yamagata, Japan aut NATIONALLICENCE 773 0- Hydrobiologia Springer Netherlands 666/1(2011-05-01), 85-97 0018-8158 666:1<85 2011 666 10750 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer