Mitochondrial lineages in Notochthamalus scabrosus as indicators of coastal recruitment and interactions

Ecology and Evolution

Kelly M. Laughlin¹  Christine Ewers¹ 

[1] Department of Genetics, University of Georgia, Athens, Georgia 30602

关键词: Cline;    Notochthamalus;    phylogeography;    source‐sink;    temporal;   

DOI  :  10.1002/ece3.283

来源: Wiley

【 摘 要 】

Abstract

A significant genetic cline has previously been identified along the Chilean coast in the barnacle Notochthamalus scabrosus. Samples from the previous study, spanning 800 km, were not able to show whether the southern lineage ultimately goes to fixation at higher latitudes. In addition to expanding the geographic sampling of this species, locations that were sampled approximately four to five generations ago were resampled for this study, enabling a temporal comparison of the location and strength of the observed cline. Here, we show that although the cline persists as expected, the tremendous changes in observed lineage frequencies near the clinal boundary are indicative of source-sink dynamics that may be associated with a codistributed biogeographic transition zone. We also find that the southern lineage does not increase in frequency in more southern populations, suggesting that this lineage is maintained through a combination of density-dependent interactions and a coastal fitness gradient.

【 授权许可】

CC BY-NC   
© 2011 The Authors. MicrobiologyOpen published by Blackwell Publishing Ltd.

Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.