Organic matter composition and macrofaunal diversity in sediments of the Condor Seamount (Azores, NE Atlantic) (Articolo in rivista)

Type
Label
  • Organic matter composition and macrofaunal diversity in sediments of the Condor Seamount (Azores, NE Atlantic) (Articolo in rivista) (literal)
Anno
  • 2013-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/j.dsr2.2013.08.006 (literal)
Alternative label
  • Bongiorni, L. ab , Ravara, A. c, Parretti, P. a, Santos, R.S. a, Rodrigues, C.F. c, Amaro, T. cd, Cunha, M.R. c (2013)
    Organic matter composition and macrofaunal diversity in sediments of the Condor Seamount (Azores, NE Atlantic)
    in Deep-sea research. Part 2. Topical studies in oceanography
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Bongiorni, L. ab , Ravara, A. c, Parretti, P. a, Santos, R.S. a, Rodrigues, C.F. c, Amaro, T. cd, Cunha, M.R. c (literal)
Pagina inizio
  • 75 (literal)
Pagina fine
  • 86 (literal)
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  • 98 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • a IMAR - Centre of IMAR of the University of the Azores, Department of Oceanography and Fisheries (DOP) and LARSyS Associated Laboratory, PT-9901-862 Horta, Azores, Portugal b ISMAR-CNR, Institute of Marine Sciences, National Research Council, Arsenale - Tesa 104, Castello 2737/F, 30122 Venezia, Italy c Departamento de Biologia and CESAM, Universidade de Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal d Norwegian Institute for Water Research (NIVA), Regional Office Bergen, Thormøhlensgate 53D, N-5006 Bergen, Norway (literal)
Titolo
  • Organic matter composition and macrofaunal diversity in sediments of the Condor Seamount (Azores, NE Atlantic) (literal)
Abstract
  • In recent years increasing knowledge has been accumulated on seamounts ecology; however their sedimentary environments and associated biological communities remain largely understudied. In this study we investigated quantity and biochemical composition of organic matter and macrofaunal diversity in sediments of the Condor Seamount (NE Atlantic, Azores). In order to test the effect of the seamount on organic matter distribution, sediment samples were collected in 6 areas: the summit, the northern and southern flanks and bases, and in an external far field site. Macrofauna abundance and diversity were investigated on the summit, the southern flank and in the far field site. The organic matter distribution reflected the complex hydrodynamic conditions occurring on the Condor. Concentrations of organic matter compounds were generally lower on the whole seamount than in the far field site and on the seamount summit compared to flanks and bases. A clear difference was also evident between the northern and southern slopes of the Condor, suggesting a role of the seamount in conditioning sedimentation processes and distribution of food resources for benthic consumers. Macrofauna assemblages changed significantly among the three sampling sites. High abundance and dominance, accompanied by low biodiversity, characterized the macrofauna community on the Condor summit, while low dominance and high biodiversity were observed at the flank. Our results, although limited to five samples on the seamount and two off the seamount, do not necessarily support the paradigm that seamounts are more biodiverse than the surrounding seafloor. However, the abundance (and biomass), functional diversity and taxonomical distinctiveness of the macrofaunal assemblages from the Condor Seamount suggest that seamounts habitats may play a relevant role in adding to the regional biodiversity. (C) 2013 Elsevier Ltd. All rights reserved. (literal)
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