Data/hora: 07/06/2024 05:33:42

Provedor de dados: | Papéis Avulsos de Zoologia
País: | Brazil
Título: | Change in the meiofauna community structure of sandy beaches of the Nuevo Gulf (Chubut, Argentina)
Autores: | Harguinteguy,Carlos A.; Cofré,M. Noelia; Pastor de Ward,Catalina T.
Data: | 2012-01-01
Ano: | 2012
Palavras-chave: | Meiofauna; Intertidal; Sandy sediment; Argentina.
Resumo: | The composition and distribution of the benthic meiofauna assemblages of the Nuevo Gulf (Chubut, Argentina) are described in relation to abiotic variables. The meiofauna and sediment samples were collected in the intertidal zone of four sandy beaches with different anthropic disturbances in June 2005. The samples were obtained at 20 sampling sites using a 2.5 cm diameter core tube at a depth of 10 cm. A total of 13 meiofauna taxa were identified, with the meiofauna being primarily represented by nematodes, gastrotrichs, ciliates and polychaetes and the meiofauna abundances ranging from 1.5 × 10³ to 6.5 × 10³ ind. 10 cm‑2. Univariate (one-way ANOVA test) and multivariate (ANOSIM/MDS test) analyses showed clear dissimilarities in community structures between sites with anthropic effects and those in pristine condition, revealed by the significant differences were found between beaches near to and far way from a city with port activity. The meiofaunal assemblage varied in abundance and diversity, and these changes in the community structure may have been related to environmental gradients on the shore. The BIO‑ENV analysis showed that the redox potential discontinuity depth might be the main factor in the spatial distribution of organisms.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492012021400001
Editor: | Museu de Zoologia da Universidade de São Paulo
Relação: | 10.1590/S0031-10492012021400001
Formato: | text/html
Fonte: | Papéis Avulsos de Zoologia  v.52 n.34 2012
Fonte: | info:eu-repo/semantics/openAccess