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ORIGINAL PAPER Feed-backs between genetic structure and perturbation-driven

Feed-backs between genetic structure and perturbation-driven
decline in seagrass (Posidonia oceanica) meadows
Elena Diaz-Almela Sophie Arnaud-Haond
Mirjam S. Vliet Elvira A lvarez Nuria Marba`
Carlos M. Duarte Ester A. Serra~o
Received: 11 August 2006 / Accepted: 9 January 2007 / Published online: 11 April 2007
Springer Science+Business Media B.V. 2007
Abstract We explored the relationships between
perturbation-driven population decline and genetic/
genotypic structure in the clonal seagrass Posidonia
oceanica, subject to intensive meadow regression
around four Mediterranean fish-farms, using seven
specific microsatellites. Two meadows were randomly
sampled (40 shoots) within 1,600 m2
at each site: the
``impacted'' station, 5200 m from fish cages, and the
``control'' station, around 1,000 m downstream further
away (considered a proxy of the pre-impact genetic
structure at the site). Clonal richness (R), Simpson


Source: Alberto, Filipe - Centro de Ciencias do Mar, Universidade do Algarve


Collections: Environmental Sciences and Ecology; Biology and Medicine