IMIS | Flanders Marine Institute
 

Flanders Marine Institute

Platform for marine research

IMIS

Publications | Institutes | Persons | Datasets | Projects | Maps
[ report an error in this record ]basket (0): add | show Printer-friendly version

Metapopulation structure in the lagoon cockle Cerastoderma lamarcki in the northern Wadden Sea
Reise, K. (2003). Metapopulation structure in the lagoon cockle Cerastoderma lamarcki in the northern Wadden Sea. Helgol. Mar. Res. 56: 252-258
In: Helgoland Marine Research. Springer: Berlin; Heidelberg. ISSN 1438-387X, more
Peer reviewed article  

Available in  Author 

Keyword
    Marine

Author  Top 

Abstract
    Benthic invertebrates in discontinuous inshore habitats and with short or no pelagic larval dispersal are likely to exhibit regional metapopulation dynamics with partially isolated local populations. Near the island of Sylt, the bivalve Cerastoderma (Cardium) lamarcki (Reeve, 1844, syn. in part with C. glaucum Bruguiére, 1789) was widespread in intertidal seagrass beds, coexisting with the sibling species C. edule (Linné1758). However, the last C. lamarcki in this habitat was found in 1980. At present the lagoon cockle is restricted to disjunct ditches, creeks and ponds within island salt marshes. There it differs in year-class structure between localities. Successful recruitment events did not coincide. At one locality, a period with regular recruitment was followed by 5 years of recruitment failure, resulting in an overaged population probably at the rim of extinction. In a nearby brackish pond, extinction was followed by recolonization 3 years later. Other lagoonal habitats which seem to be suitable are without cockles. It is speculated that small and isolated habitats occasionally receive colonizers by eggs and juveniles adhering to avian vectors.

All data in IMIS is subject to the VLIZ privacy policy Top | Author