%0 Journal Article %1 woltmann2012finescale %A Woltmann, Stefan %A Kreiser, Brian R. %A Sherry, Thomas W. %D 2012 %I Springer Netherlands %J Conservation Genetics %K antbird birds conservation_genetics microsats patchy_environment spatial_structure %N 4 %P 925-935 %R 10.1007/s10592-012-0341-2 %T Fine-scale genetic population structure of an understory rainforest bird in Costa Rica %U http://dx.doi.org/10.1007/s10592-012-0341-2 %V 13 %X We studied five populations of a rainforest understory insectivorous bird (Myrmeciza exsul, chestnut- backed antbird) in a fragmented landscape in northeastern Costa Rica in order to test hypotheses about the influence of forest fragmentation on population genetic structure using 16 microsatellite loci. Bayesian assignment approa- ches—perhaps the most conservative analyses we per- formed—consistently grouped the sites into two distinct groups, with all individuals from the smallest and most isolated population clustering separately from the other four sites. Additional analyses revealed (1) overall signif- icant genetic structure; (2) a pattern of population differ- entiation consistent with a hypothesis of isolation by resistance (landscape connectivity), but not distance; and (3) relatively short dispersal distances indicated by ele- vated mean pairwise relatedness in several of the sites. Our results are somewhat surprising given the small geographic distances between sites (11–34 km) and the short time (*60 years) since wide-spread deforestation in this land- scape. We suspect fine-scale genetic structure may occur in many resident tropical bird species, and in the case of the chestnut-backed antbird it appears that anthropogenic habitat fragmentation has important population genetic implications. It appears that chestnut-backed antbirds may persist in fragmented landscapes in the absence of signifi- cant migration among patches, but mechanisms that allow this species to persist when many other similar species do not are not well understood.

@article{woltmann2012finescale, abstract = {We studied five populations of a rainforest understory insectivorous bird (Myrmeciza exsul, chestnut- backed antbird) in a fragmented landscape in northeastern Costa Rica in order to test hypotheses about the influence of forest fragmentation on population genetic structure using 16 microsatellite loci. Bayesian assignment approa- ches—perhaps the most conservative analyses we per- formed—consistently grouped the sites into two distinct groups, with all individuals from the smallest and most isolated population clustering separately from the other four sites. Additional analyses revealed (1) overall signif- icant genetic structure; (2) a pattern of population differ- entiation consistent with a hypothesis of isolation by resistance (landscape connectivity), but not distance; and (3) relatively short dispersal distances indicated by ele- vated mean pairwise relatedness in several of the sites. Our results are somewhat surprising given the small geographic distances between sites (11–34 km) and the short time (*60 years) since wide-spread deforestation in this land- scape. We suspect fine-scale genetic structure may occur in many resident tropical bird species, and in the case of the chestnut-backed antbird it appears that anthropogenic habitat fragmentation has important population genetic implications. It appears that chestnut-backed antbirds may persist in fragmented landscapes in the absence of signifi- cant migration among patches, but mechanisms that allow this species to persist when many other similar species do not are not well understood.}, added-at = {2014-05-22T16:40:07.000+0200}, author = {Woltmann, Stefan and Kreiser, Brian R. and Sherry, Thomas W.}, biburl = {https://www.bibsonomy.org/bibtex/2613b7122bcaafa7fd76f3938fea89f95/peter.ralph}, doi = {10.1007/s10592-012-0341-2}, interhash = {56079e190a1184d2c563cf8557dc2951}, intrahash = {613b7122bcaafa7fd76f3938fea89f95}, issn = {1566-0621}, journal = {Conservation Genetics}, keywords = {antbird birds conservation_genetics microsats patchy_environment spatial_structure}, language = {English}, number = 4, pages = {925-935}, publisher = {Springer Netherlands}, timestamp = {2014-05-22T16:40:07.000+0200}, title = {Fine-scale genetic population structure of an understory rainforest bird in {Costa} {Rica}}, url = {http://dx.doi.org/10.1007/s10592-012-0341-2}, volume = 13, year = 2012 }