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K Desender and J Serrano (1999)

A genetic comparison of Atlantic and Mediterranean populations of a saltmarsh beetle


Enzyme and dispersal polymorphism in the saltmarsh carabid beetle Pogonus chalceus Marsham were compared between 30 Atlantic and nine Mediterranean European populations. Allozyme results showed that Mediterranean beetles (France, Spain) are genetically distinct from Atlantic populations. All Mediterranean beetles screened showed complete fixation at one locus (IDH1), which in Atlantic populations nearly always varied, whereas some unique Mediterranean alleles were observed for another locus (MPI). Genetic differentiation (allozymes) between Mediterranean populations, although highly significant, appeared to be much lower (F-ST =0.098) than between Atlantic populations (F-ST =0.178). Beetles from the Mediterranean showed a remarkably high dispersal power in all populations studied, whereas Atlantic populations showed wing polymorphism and reduced dispersal power to much more varying degrees. These results, along with relatively lower levels of Pogonus chalceus abundance in many Mediterranean saltmarshes, strongly suggest increased levels of extinction/recolonisation in relation to a lower degree of habitat persistence in Mediterranean compared with most Atlantic saltmarshes. Conclusions are relevant to issues in bath evolutionary and conservation biology. Key welds: population genetics, genetic differentiation, dispersal power, gene flow habitat fragmentation, allozymes, wing polymorphism, saltmarshes, Atlantic, Mediterranean, ground beetles (Carabidae), Pogonus chalceus.

population genetics; genetic differentiation; dispersal power; gene flow; habitat fragmentation; allozymes; wing polymorphism; saltmarshes; Atlantic; Mediterranean; ground beetles (Carabidae); Pogonus chalceus
5th Benelux Congress of Zoology, GHENT, BELGIUM, NOV 06-07, 1998
  • ISSN: 0777-6276

ISSN 2295-0451 (online version)
ISSN 0777-6279 (printed version)
impact factor 2015: 0,87.

Prof. Dr. Isa Schön
Royal Belgian Institute of Natural Sciences
Vautierstraat 29
1000 Brussels, Belgium


Annales de la Société malacologique de Belgique
​Annales de la Société royale malacologique et zoologique de Belgique
Annales de la Société Royale Zoologique de Belgique
Belgian Journal of Zoology