caa a22 4500 445845791 CHVBK 20180317145358.0 cr unu---uuuuu 170323e20111201xx s 000 0 eng 10.1007/s10709-012-9640-2 doi (NATIONALLICENCE)springer-10.1007/s10709-012-9640-2 Historical process lead to false genetic signal of current connectivity among populations [Elektronische Daten] [Frédéric Cyr, Bernard Angers] Identification of the effects of historical processes on spatial genetic variation is of major importance in landscape genetics, especially in recent systems where the signal of recent isolation is often hardly perceptible. The goal of this study was to assess how differences in colonization patterns could influence spatial genetic variation using two centrarchidae species, the pumpkinseed sunfish (Lepomis gibbosus) and the rock bass (Ambloplites rupestris), from two adjacent drainage systems. The striking difference between the spatial genetic variations of the two species suggests completely opposite patterns of colonization. Rock bass colonized the drainage system from a downstream source, which resulted in a loss of diversity in upstream populations and a strong differentiation between drainage systems. In contrast, the reduction of genetic diversity and increase of differentiation toward downstream populations that were observed among sunfish populations suggest colonization from upstream to downstream. The colonization pattern observed in sunfish, which result in low differentiation between upstream most sites of the two drainages, leads to a false genetic signal of current inter-drainage gene flow. The present study demonstrates through empirical evidence that colonization patterns may impede the capacity to estimate current connectivity. Springer Science+Business Media B.V., 2012 Colonization patterns nationallicence Landscape genetics nationallicence Connectivity nationallicence Spatial genetic variation nationallicence Cyr Frédéric Group for Interuniversity Research in Limnology and Aquatic Environment (GRIL), Département de Sciences Biologiques, Université de Montréal, 90 Vincent d'Indy, H2V 2S9, Montreal, QC, Canada aut Angers Bernard Group for Interuniversity Research in Limnology and Aquatic Environment (GRIL), Département de Sciences Biologiques, Université de Montréal, 90 Vincent d'Indy, H2V 2S9, Montreal, QC, Canada aut Genetica Springer Netherlands 139/11-12(2011-12-01), 1417-1428 0016-6707 139:11-12<1417 2011 139 10709 https://doi.org/10.1007/s10709-012-9640-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10709-012-9640-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Cyr Frédéric Group for Interuniversity Research in Limnology and Aquatic Environment (GRIL), Département de Sciences Biologiques, Université de Montréal, 90 Vincent d'Indy, H2V 2S9, Montreal, QC, Canada aut NATIONALLICENCE 700 1- Angers Bernard Group for Interuniversity Research in Limnology and Aquatic Environment (GRIL), Département de Sciences Biologiques, Université de Montréal, 90 Vincent d'Indy, H2V 2S9, Montreal, QC, Canada aut NATIONALLICENCE 773 0- Genetica Springer Netherlands 139/11-12(2011-12-01), 1417-1428 0016-6707 139:11-12<1417 2011 139 10709 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer