Data/hora: 01/06/2024 10:20:07

Provedor de dados: | 76
País: | Brazil
Título: | Temporal variability of benthic macrofauna on Cassino beach, southernmost Brazil
Autores: | Neves,Luciano P. das; Silva,Pedro de S. R. da; Bemvenuti,Carlos E.
Data: | 2008-03-01
Ano: | 2008
Palavras-chave: | Sandy beaches; Benthic macrofauna; Temporal variation; Cassino beach.
Resumo: | The temporal variability of benthic macrofauna on Cassino beach, southernmost Brazil, was studied for a period of one year (June 2004 to May 2005) based on monthly sampling. Three sites were selected distant 50m from each other. At each site, 3 transects were established, 2m equidistant from one another. Each transect extended from the base of the primary dunes to the inner surf zone at approximately 1m in depth, with 7 or 8 sampling levels. Within transects, the distance between the levels was 20m until the upper swash zone, from which distance was 10m until the 1-meter isobath. The temporal variation in the abundance of benthic macrofauna observed in the present study can be attributed to (1) the positive effects of the recruitment peaks and migration of particular species to the swash zone and (2) negative effects of the migration of some species to deeper waters, as well (3) as mortality through natural causes (stranding and action of predators) and (4) human causes (harvesting and vehicle transit). We attribute the expressive abundance increase of benthic macrofauna to recruitment. The stranding, that is, the trapping of the organisms on the upper parts of the beach, is likely the main cause of abrupt drops in benthic macrofauna abundance.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212008000100005
Editor: | Museu de Ciências Naturais
Relação: | 10.1590/S0073-47212008000100005
Formato: | text/html
Fonte: | Iheringia. Série Zoologia  v.98 n.1 2008
Fonte: | info:eu-repo/semantics/openAccess