Lower genetic diversity in the limpet <Emphasis Type="Italic">Patella caerulea</Emphasis> on urban coastal structures compared to natural rocky habitats |
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Authors: | Cécile Fauvelot Francesca Bertozzi Federica Costantini Laura Airoldi Marco Abbiati |
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Institution: | 1.Dipartimento di Biologia Evoluzionistica Sperimentale, Centro Interdipartimentale di Ricerca per le Scienze Ambientali,University of Bologna,Ravenna,Italy;2.Institut de Recherche pour le Développement (IRD), UR128, Centre de Biologie et d’Ecologie Tropicale et Méditerranéenne,Université de Perpignan,Perpignan Cedex,France |
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Abstract: | Human-made structures are increasingly found in marine coastal habitats. The aim of the present study was to explore whether
urban coastal structures can affect the genetic variation of hard-bottom species. We conducted a population genetic analysis
on the limpet Patella caerulea sampled in both natural and artificial habitats along the Adriatic coast. Five microsatellite loci were used to test for
differences in genetic diversity and structure among samples. Three microsatellite loci showed strong Hardy–Weinberg disequilibrium
likely linked with the presence of null alleles. Genetic diversity was significantly higher in natural habitat than in artificial
habitat. A weak but significant differentiation over all limpet samples was observed, but not related to the type of habitat.
While the exact causes of the differences in genetic diversity deserve further investigation, these results clearly point
that the expansion of urban structures can lead to genetic diversity loss at regional scales. |
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