TAILIEUCHUNG - Báo cáo sinh học: "Landscape genetics goes to sea"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học Journal of Biology đề tài: Landscape genetics goes to sea. | Journal of Biology BioMed Central Minireview Landscape genetics goes to sea Michael Moller Hansen and Jakob Hemmer-Hansen Address Technical University of Denmark Danish Institute for Fisheries Research Department of Inland Fisheries Vejlsovej 39 DK-8600 Silkeborg Denmark. Correspondence Michael Moller Hansen. Email mmh@ Published 16 November 2007 Journal of Biology 2007 6 6 The electronic version of this article is the complete one and can be found online at http content 6 3 6 2007 BioMed Central Ltd Abstract A recent study revealing geographical and environmental barriers to gene flow in the harbour porpoise shows the great potential of landscape genetics when applied to marine organisms. Analysis of the genetic structure of populations using molecular markers is currently undergoing a revolution as a result of the advent of novel conceptual and statistical developments along with advances in molecular biology and genomics 1 . One of the most promising new avenues consists in combining information on geographical landscape features with analysis of molecular markers in order to understand how environmental factors affect the dispersal of individuals and the size and density of populations. This discipline termed landscape genetics 2 3 provides a bridge between landscape ecology and population genetics and has so far concentrated on terrestrial 4 and freshwater 5 organisms. The marine environment may superficially be conceived as coherent and homogenous across large geographical distances. Concordant with this view several studies have shown significantly lower genetic differentiation among populations of marine fish species as compared to freshwater fishes 6 . Nevertheless since the late 1990s studies have increasingly documented genetic differentiation among populations of marine organisms often coinciding with transitions between different basins 7 8 and gyres and eddies 9 . Landscape genetics may show particularly strong potential for .

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