Comunidades macrobentonicas profundas del cańón submarino de nazaré (NW Portugal)

Translated title of the contribution: Deep macrobenthic communities from Nazaré submarine canyon (NW Portugal)

J. Cúrdia*, S. Carvalho, A. Ravara, J. D. Gage, A. M. Rodrigues, V. Quintino

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

42 Scopus citations

Abstract

Macrofauna community structure within Nazaré Submarine Canyon is analysed and used to assess the potential effects of natural enrichment in this area subjected to accumulation of coastal sediments. A transect including three stations (2894, 3514 and 4141 m) was carried out in the Nazaré Submarine Canyon (NW Portugal) during a cruise of OMEX II programme (Ocean Margin Exchange), in the winter season of 1999. Although data was not collected in order to calculate sedimentation rates, sampling station at 2894 m is located in an area characterised by high levels of sedimentation, thus a high amount of organic matter is expected to be available for the local communities. Faunistic data are discussed in the context of the different features of the stations sampled. Multivariate analysis clearly separates the shallowest station from the other ones, which otherwise appear to be very similar. It also revealed a perceptible gradient along sediment depth at all stations, from shallow to deeper layers. Exceptionally depressed species richness and low evenness values were observed at the 2894 m station. The high number of individuals of a single species. Cossura sp. A, and the atypical diversity, dominance and evenness values obtained for this station support the hypothesis of community disturbance due to organic enrichment.

Translated title of the contributionDeep macrobenthic communities from Nazaré submarine canyon (NW Portugal)
Original languageSpanish
Pages (from-to)171-180
Number of pages10
JournalScientia Marina
Volume68
Issue numberSUPPL 1
StatePublished - Apr 2004
Externally publishedYes

Keywords

  • Community structure
  • Deep sea
  • Macrobenthos
  • Natural organic enrichment
  • NE Atlantic
  • Submarine canyons

ASJC Scopus subject areas

  • Aquatic Science

Fingerprint

Dive into the research topics of 'Deep macrobenthic communities from Nazaré submarine canyon (NW Portugal)'. Together they form a unique fingerprint.

Cite this