Journal Title
Title of Journal: Mar Biol
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Abbravation: Marine Biology
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Publisher
Springer Berlin Heidelberg
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Authors: Carolina Briones Pablo Presa Montse Pérez Alfonso Pita Ricardo Guiñez
Publish Date: 2013/08/23
Volume: 160, Issue: 12, Pages: 3143-3156
Abstract
Connectivity in benthic marine animals with complex life cycles occurs primarily during the pelagic larval stage and depends deterministically on oceanographic dynamics The scale of such larval dispersal is highly uncertain due the difficulty of direct measurement and poor knowledge of larval dynamics and ocean flow variability This study characterizes the pattern of genetic connectivity in the ecosystem engineer Perumytilus purpuratus between latitudes 23°S and 33°S which includes the ecological discontinuity reported for many taxa north to 32°S at the southeast Pacific The genetic discontinuity observed in P purpuratus around 26°S is described herein while that detected at 28°S is in line with the ecological discontinuity in coverage recruitment and density previously reported for this mussel between 28°S and 32°S Both discontinuities delimitate two major gene pools upon Bayesian inferences on geographical variation of five microsatellite loci Interestingly marker Pepu1 was responsible for most variation between pools and was potentially under selection In fact inferences excluding Pepu1 produced a single gene pool k = 1 in centralnorthern Chile The IBD connectivity pattern observed among P purpuratus beds distributed in the interval 23°S–33°S is congruent with processes driven by larval dynamics and the dominant equatorward Humboldt Current along a coast largely unaffected by ice during the last Pleistocene glaciation However the selective scenario unveiled by microsatellite Pepu1 inside the 25°S–28°S ecological discontinuity is consistent with selective processes associated with specific mesoscale properties operating in this area This study highlights the usefulness of integrating different oceanographic scales ecological data and population genetics to better understand connectivity of benthic marine speciesAuthors are indebted to all those contributing to achieve this study as Cristian Briones for schematic drawing and David Campos for map edition and especially to three anonymous scientists who significantly reviewed a previous draft of this manuscript Financial support was provided by Fondo Nacional de Ciencia y Tecnología FONDECYT Project 1101007 to RG Universidad de Antofagasta Project CODEI312010 to RG Comisión Nacional de Ciencia y Tecnología CONICYT 2008 Ph D scholarship granted to CB and Programa de Mejoramiento de la Calidad y la Equidad de la Educación Superior MECESUP de la República de Chile Project ANT0711 Universidad de Antofagasta
Keywords:
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