caa a22 4500 445857625 CHVBK 20180317145433.0 cr unu---uuuuu 170323e20110801xx s 000 0 eng 10.1007/s10592-011-0203-3 doi (NATIONALLICENCE)springer-10.1007/s10592-011-0203-3 Population genetic diversity and structure within and among disjunct populations of Alnus maritima (seaside alder) using microsatellites [Elektronische Daten] [James Jones, J. Gibson] Small, isolated populations are prone to genetic drift and high levels of inbreeding that can threaten their long-term survival. Alnus maritima persists exclusively in three groups of small, highly disjunct, regional populations in the Delmarva Peninsula, Georgia, and Oklahoma. Trees in the three regions are recognized as separate subspecies. Microsatellite markers were used to measure fine-scale population genetic diversity and structure (1) within and among regions and (2) within and among populations in each region. Compared to a previous study utilizing allozymes, microsatellite data show higher levels of variation, lower levels of inbreeding, but similar levels of genetic differentiation among regions. Significant genetic differentiation was detected among regions and among distinct populations within regions. Genetic differentiation was significantly correlated with geographic distance among regional populations, but not among populations within regions. Populations, therefore, likely represent fragments of formerly extensive networks of populations that have decayed and retracted due to competition with other species better adapted to the shadier habitats of late-succession environments. The unique genetic features of populations within different regions should be considered as part of future conservation efforts. Springer Science+Business Media B.V., 2011 Alnus nationallicence Rare plants nationallicence Microsatellites nationallicence Georgia nationallicence Oklahoma nationallicence Delmarva peninsula nationallicence Jones James Department of Botany-Microbiology, University of Oklahoma, 770 Van Vleet Oval, 73019, Norman, OK, USA aut Gibson J. Department of Botany-Microbiology, University of Oklahoma, 770 Van Vleet Oval, 73019, Norman, OK, USA aut Conservation Genetics Springer Netherlands 12/4(2011-08-01), 1003-1013 1566-0621 12:4<1003 2011 12 10592 https://doi.org/10.1007/s10592-011-0203-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10592-011-0203-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Jones James Department of Botany-Microbiology, University of Oklahoma, 770 Van Vleet Oval, 73019, Norman, OK, USA aut NATIONALLICENCE 700 1- Gibson J. Department of Botany-Microbiology, University of Oklahoma, 770 Van Vleet Oval, 73019, Norman, OK, USA aut NATIONALLICENCE 773 0- Conservation Genetics Springer Netherlands 12/4(2011-08-01), 1003-1013 1566-0621 12:4<1003 2011 12 10592 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer