caa a22 4500 445856955 CHVBK 20180317145430.0 cr unu---uuuuu 170323e20110201xx s 000 0 eng 10.1007/s10592-009-9995-9 doi (NATIONALLICENCE)springer-10.1007/s10592-009-9995-9 Levels of gene flow among populations of a wolf spider in a recently fragmented habitat: current versus historical rates [Elektronische Daten] [David Reed, View-Hune Teoh, Gail Stratton, Robert Hataway] Gene flow among populations is important for countering the deleterious effects of random genetic drift and inbreeding, as well as spreading beneficial mutations. Wind-driven aerial dispersal is known to occur in numerous plants and invertebrates. Its evolution suggests that historically, suitable habitat patches were dense enough to make such undirected dispersal evolutionarily advantageous. Using microsatellite markers we assessed the population genetic structure of seven populations of a wolf spider (Rabidosa rabida) capable of ballooning. Historically, each spider population received a mean of 1.5 migrants per generation from the other six populations. Over the past several generations the number of migrants reaching a population is only 0.2. This statistically significant reduction in gene flow coincides with high levels of habitat fragmentation and suggests that undirected aerial dispersal is ineffective in this fragmented landscape. Further, individuals within populations showed signficantly elevated levels of homozygosity relative to Hardy-Weinberg expectations, suggesting that cursorial dispersal may be very limited and genetic structure within populations exists. Inbreeding coefficients averaged 0.18 over all seven populations with very little variation among populations (s=0.02). Fitness was lower in smaller populations relative to larger ones. Altered landscapes pose evolutionary dilemmas for many metapopulations and species that depend on undirected movement for dispersal may be particularly vulnerable to habitat fragmentation. Springer Science+Business Media B.V., 2009 Gene flow nationallicence Genetic drift nationallicence Habitat fragmentation nationallicence Inbreeding depression nationallicence Dispersal nationallicence Fitness nationallicence Inbreeding nationallicence Spiders nationallicence Reed David Department of Biology, University of Mississippi, P.O. Box 1848, 38677, University, MS, USA aut Teoh View-Hune Department of Biology, University of Mississippi, P.O. Box 1848, 38677, University, MS, USA aut Stratton Gail Department of Biology, University of Mississippi, P.O. Box 1848, 38677, University, MS, USA aut Hataway Robert Department of Biology, University of Mississippi, P.O. Box 1848, 38677, University, MS, USA aut Conservation Genetics Springer Netherlands 12/1(2011-02-01), 331-335 1566-0621 12:1<331 2011 12 10592 https://doi.org/10.1007/s10592-009-9995-9 text/html Onlinezugriff via DOI 1 brief-communication jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10592-009-9995-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Reed David Department of Biology, University of Mississippi, P.O. Box 1848, 38677, University, MS, USA aut NATIONALLICENCE 700 1- Teoh View-Hune Department of Biology, University of Mississippi, P.O. Box 1848, 38677, University, MS, USA aut NATIONALLICENCE 700 1- Stratton Gail Department of Biology, University of Mississippi, P.O. Box 1848, 38677, University, MS, USA aut NATIONALLICENCE 700 1- Hataway Robert Department of Biology, University of Mississippi, P.O. Box 1848, 38677, University, MS, USA aut NATIONALLICENCE 773 0- Conservation Genetics Springer Netherlands 12/1(2011-02-01), 331-335 1566-0621 12:1<331 2011 12 10592 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer