Rapid decline of the greater European peaclam at the periphery of its distribution

• Tipo: Artigo em Revista Científica Internacional
• Data: 2011

Autores

Sousa, R (Autor) Outra; Ilarri, M (Autor) Outra; Souza, AT (Autor) Outra; Antunes, C (Autor) Outra; Guilhermino, L. (Autor) ICBAS

Revista

Título: Annales de Limnologie

Vol. 47

Páginas: 211-219

ISSN: 0003-4088

Editora: EDP Sciences

Indexação

ISI Web of Knowledge - 8 Citações

Scopus - 6 Citações

Outras Informações

ID Authenticus: P-002-XAN

DOI: 10.1051/limn/2011041

Abstract (EN): Extirpation or even extinction of freshwater invertebrate species is a neglected conservation issue; declines in abundance and spatial distribution for freshwater invertebrates are far less documented than for vertebrate species. In the Minho River tidal freshwater wetlands (northwest of Iberian Peninsula), a rapid decline in density and biomass of the bivalve Pisidium amnicum was recorded at 16 different sites over seven years, from 2004 to 2010, without any sign of a potential recovery. Mean density values reached more than 80 ind.m(-2) in 2004, but declined to less than 1 ind.m(-2) in 2009 and 2010. An identical declining trend was observed for biomass. A significant reduction in the spatial distribution also occurred. The abiotic changes resulting from the 2005 heat wave and possibly the negative interactions imposed by the non-indigenous invasive bivalve Corbicula fluminea were the main factors responsible for the declining trends. Given the very low density, P. amnicum is facing a serious risk of extirpation in this ecosystem and conservational measures are urgently needed.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 9