caa a22 4500 445857161 CHVBK 20180317145431.0 cr unu---uuuuu 170323e20111201xx s 000 0 eng 10.1007/s10592-011-0239-4 doi (NATIONALLICENCE)springer-10.1007/s10592-011-0239-4 High gene flow in epiphytic ferns despite habitat loss and fragmentation [Elektronische Daten] [Manuela Winkler, Marcus Koch, Peter Hietz] Tropical montane forests suffer from increasing fragmentation and replacement by other types of land-use such as coffee plantations. These processes are known to affect gene flow and genetic structure of plant populations. Epiphytes are particularly vulnerable because they depend on their supporting trees for their entire life-cycle. We compared population genetic structure and genetic diversity derived from AFLP markers of two epiphytic fern species differing in their ability to colonize secondary habitats. One species, Pleopeltis crassinervata, is a successful colonizer of shade trees and isolated trees whereas the other species, Polypodium rhodopleuron, is restricted to forests with anthropogenic separation leading to significant isolation between populations. By far most genetic variation was distributed within rather than among populations in both species, and a genetic admixture analysis did not reveal any clustering. Gene flow exceeded by far the benchmark of one migrant per generation to prevent genetic divergence between populations in both species. Though populations are threatened by habitat loss, long-distance dispersal is likely to support gene flow even between distant populations, which efficiently delays genetic isolation. Consequently, populations may rather be threatened by ecological consequences of habitat loss and fragmentation. The Author(s), 2011 Colonization nationallicence Epiphyte nationallicence Mexico nationallicence Pleopeltis crassinervata nationallicence Polypodium rhodopleuron nationallicence Secondary habitats nationallicence Tropical montane forest nationallicence Winkler Manuela Department of Integrative Biology, Institute of Botany, University of Natural Resources and Life Sciences (Boku), Gregor-Mendel-Str. 33, 1180, Vienna, Austria aut Koch Marcus Department of Biodiversity and Plant Systematics, Centre for Organismal Studies (COS) Heidelberg, University of Heidelberg, Im Neuenheimer Feld 345, 69120, Heidelberg, Germany aut Hietz Peter Department of Integrative Biology, Institute of Botany, University of Natural Resources and Life Sciences (Boku), Gregor-Mendel-Str. 33, 1180, Vienna, Austria aut Conservation Genetics Springer Netherlands 12/6(2011-12-01), 1411-1420 1566-0621 12:6<1411 2011 12 10592 https://doi.org/10.1007/s10592-011-0239-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10592-011-0239-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Winkler Manuela Department of Integrative Biology, Institute of Botany, University of Natural Resources and Life Sciences (Boku), Gregor-Mendel-Str. 33, 1180, Vienna, Austria aut NATIONALLICENCE 700 1- Koch Marcus Department of Biodiversity and Plant Systematics, Centre for Organismal Studies (COS) Heidelberg, University of Heidelberg, Im Neuenheimer Feld 345, 69120, Heidelberg, Germany aut NATIONALLICENCE 700 1- Hietz Peter Department of Integrative Biology, Institute of Botany, University of Natural Resources and Life Sciences (Boku), Gregor-Mendel-Str. 33, 1180, Vienna, Austria aut NATIONALLICENCE 773 0- Conservation Genetics Springer Netherlands 12/6(2011-12-01), 1411-1420 1566-0621 12:6<1411 2011 12 10592 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer