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Distributional overlap rather than habitat differentiation characterizes co-occurrence of bivalves in intertidal soft sediment systems ArchiMer
Compton, Tanya J.; Troost, Tineke A.; Van Der Meer, Jaap; Kraan, Casper; Honkoop, Pieter J. C.; Rogers, Danny I.; Pearson, Grant B.; De Goeij, Petra; Bocher, Pierrick; Lavaleye, Marc S. S.; Leyrer, Jutta; Yates, Mick G.; Dekinga, Anne; Piersma, Theunis.
Diverse species assemblages are often associated with a diversity of habitat structures. Sedimentary systems seem to be no exception, as within sedimentary systems benthic species diversity within a sample point appears to correlate with sediment grain size complexity. However, it remains to be shown whether total benthic species diversity relates to a system's sediment heterogeneity across multiple systems. In the present paper we examined whether bivalve diversity is associated with: (1) sediment heterogeneity across systems and (2) sediment grain size complexity within systems, at 9 temperate and tropical tidal flat systems. Although bivalve life-history strategies, like post-settlement habitat selection, might suggest that sediment heterogeneity should...
Tipo: Text Palavras-chave: Aiguillon Bay; Marennes Oleron Bay; Mont Saint Michel Bay; Wadden Sea; The Wash; Roebuck Bay; Banc d'Arguin; Sediment diversity.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-6141.pdf
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Density-dependent growth of bivalves dominating the intertidal zone of Banc d'Arguin, Mauritania: importance of feeding mode, habitat and season ArchiMer
Van Der Geest, Matthijs; Van Der Lely, Jorge A. C.; Van Gils, Jan A.; Piersma, Theunis; Lok, Tamar.
Accurate predictions of population dynamics require an understanding of the ways by which environmental conditions and species-specific traits affect the magnitude of density dependence. Here, we evaluated the potential impact of season and habitat (characterized by sediment grain size and seagrass biomass) on the magnitude of density dependence in shell growth of 3 infaunal bivalve species dominating the tropical intertidal benthic communities of Banc d'Arguin, Mauritania. Two of our focal species were filter feeders (Senilia senilis and Pelecyora isocardia) and one was a facultative mixotroph (Loripes orbiculatus), mainly relying on organic carbon provided by sulphide-oxidizing endosymbiotic gill-bacteria (i.e. chemosymbiotic). Distinguishing 2 seasons,...
Tipo: Text Palavras-chave: Carrying capacity; Chemosymbiosis; Density dependence; Environmental heterogeneity; Feeding guild; Seagrass; Soft-sediment habitat.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00492/60319/63745.pdf
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