caa a22 4500 605509190 CHVBK 20210128100640.0 cr unu---uuuuu 210128e20150901xx s 000 0 eng 10.1007/s10452-015-9529-0 doi (NATIONALLICENCE)springer-10.1007/s10452-015-9529-0 Genetic diversity and structure of the tropical seagrass Cymodocea serrulata spanning its central diversity hotspot and range edge [Elektronische Daten] [Dan Arriesgado, Hiroyuki Kurokochi, Yuichi Nakajima, Yu Matsuki, Wilfredo Uy, Miguel Fortes, Wilfredo Campos, Kazuo Nadaoka, Chunlan Lian] Persistence of populations at their distributional ranges relies on local population dynamics and the fitness of species with low dispersal potential. We analyzed the population genetic diversity and structure of a tropical seagrass species, Cymodocea serrulata, at 34 sites spanning Philippine (diversity hotspot) and Ryukyu Islands (northern limit of distribution) populations using microsatellite (SSR) markers. Seagrass populations in the diversity hotspot are hypothesized to contain higher genetic diversity and clonal richness than those resulting from expansion or geographic range limits. We tested this hypothesis by comparing the genetic diversity, genetic structure and clonal richness of C. serrulata populations in the Philippines and Ryukyu Islands. C. serrulata populations showed decreased genetic diversity and clonal richness at their northern limit. Clonal reproduction predominated at the northern limit, while sexual reproduction prevailed in the diversity hotspot. Decreased genetic diversity and clonal richness at the northern limit may be the consequence of drift resulting from founder effect, reduced habitat, sea surface temperature and low gene flow and/or natural selection across life stages, wherein clonal reproduction confers greater environmental fitness. Analysis of molecular variance (AMOVA) and the fixation index, F ST, showed significant genetic differentiation within and among geographic populations. STRUCTURE analysis revealed that the Ryukyu Islands populations were mosaics of genets from the eastern Philippines, likely carried by the Kuroshio Current. Springer Science+Business Media Dordrecht, 2015 Microsatellite nationallicence Tropical seagrass nationallicence Clonal nationallicence Northern limit nationallicence Diversity hotspot nationallicence Arriesgado Dan Department of Mechanical and Environmental Informatics, Graduate School of Information Science and Engineering, Tokyo Institute of Technology, 2-12-1 O-okayama, 152-8552, Meguro, Tokyo, Japan aut Kurokochi Hiroyuki Asian Natural Environmental Science Center, The University of Tokyo, 1-1-8 Midori-cho, 188-0002, Nishitokyo, Tokyo, Japan aut Nakajima Yuichi Asian Natural Environmental Science Center, The University of Tokyo, 1-1-8 Midori-cho, 188-0002, Nishitokyo, Tokyo, Japan aut Matsuki Yu Asian Natural Environmental Science Center, The University of Tokyo, 1-1-8 Midori-cho, 188-0002, Nishitokyo, Tokyo, Japan aut Uy Wilfredo Institute of Fisheries Research and Development, Mindanao State University at Naawan, 9023, Naawan, Misamis Oriental, Philippines aut Fortes Miguel Marine Science Institute CS, University of the Philippines, 1101, Diliman, Quezon City, Philippines aut Campos Wilfredo Division of Biological Sciences, College of Arts and Sciences, University of the Philippines in the Visayas, 5023, Miag-ao, Iloilo, Philippines aut Nadaoka Kazuo Department of Mechanical and Environmental Informatics, Graduate School of Information Science and Engineering, Tokyo Institute of Technology, 2-12-1 O-okayama, 152-8552, Meguro, Tokyo, Japan aut Lian Chunlan Asian Natural Environmental Science Center, The University of Tokyo, 1-1-8 Midori-cho, 188-0002, Nishitokyo, Tokyo, Japan aut Aquatic Ecology Springer Netherlands 49/3(2015-09-01), 357-372 1386-2588 49:3<357 2015 49 10452 https://doi.org/10.1007/s10452-015-9529-0 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10452-015-9529-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Arriesgado Dan Department of Mechanical and Environmental Informatics, Graduate School of Information Science and Engineering, Tokyo Institute of Technology, 2-12-1 O-okayama, 152-8552, Meguro, Tokyo, Japan aut NATIONALLICENCE 700 1- Kurokochi Hiroyuki Asian Natural Environmental Science Center, The University of Tokyo, 1-1-8 Midori-cho, 188-0002, Nishitokyo, Tokyo, Japan aut NATIONALLICENCE 700 1- Nakajima Yuichi Asian Natural Environmental Science Center, The University of Tokyo, 1-1-8 Midori-cho, 188-0002, Nishitokyo, Tokyo, Japan aut NATIONALLICENCE 700 1- Matsuki Yu Asian Natural Environmental Science Center, The University of Tokyo, 1-1-8 Midori-cho, 188-0002, Nishitokyo, Tokyo, Japan aut NATIONALLICENCE 700 1- Uy Wilfredo Institute of Fisheries Research and Development, Mindanao State University at Naawan, 9023, Naawan, Misamis Oriental, Philippines aut NATIONALLICENCE 700 1- Fortes Miguel Marine Science Institute CS, University of the Philippines, 1101, Diliman, Quezon City, Philippines aut NATIONALLICENCE 700 1- Campos Wilfredo Division of Biological Sciences, College of Arts and Sciences, University of the Philippines in the Visayas, 5023, Miag-ao, Iloilo, Philippines aut NATIONALLICENCE 700 1- Nadaoka Kazuo Department of Mechanical and Environmental Informatics, Graduate School of Information Science and Engineering, Tokyo Institute of Technology, 2-12-1 O-okayama, 152-8552, Meguro, Tokyo, Japan aut NATIONALLICENCE 700 1- Lian Chunlan Asian Natural Environmental Science Center, The University of Tokyo, 1-1-8 Midori-cho, 188-0002, Nishitokyo, Tokyo, Japan aut NATIONALLICENCE 773 0- Aquatic Ecology Springer Netherlands 49/3(2015-09-01), 357-372 1386-2588 49:3<357 2015 49 10452