STARDUST II - Spatial and Temporal Assessment of high Resolution Depth profiles Using novel Sampling Technologies
The fate of pollutants in fluvial and marine sediments in cross-border zones
Introduction Objectives News Downloads Data System Pictures Partners

Data System

People |  Institutes |  Publications |  Datasets |  Data (login)

[ meld een fout in dit record ]mandje (0): toevoegen | toon Print deze pagina
Nutritional relations of deep-sea hydrothermal fields at the Mid-Atlantic Ridge: a stable isotope approach
Colaço, A.; Dehairs, F.A.; Desbruyères, D. (2002). Nutritional relations of deep-sea hydrothermal fields at the Mid-Atlantic Ridge: a stable isotope approach. Deep-Sea Res., Part 1, Oceanogr. Res. Pap. 49(2): 395-412. dx.doi.org/10.1016/S0967-0637(01)00060-7
In: Deep-Sea Research, Part I. Oceanographic Research Papers. Elsevier: Oxford. ISSN 0967-0637; e-ISSN 1879-0119
Peer reviewed article  
Beschikbaar in  Auteurs 
Trefwoorden
    A, Mid-Atlantic Ridge
    Food webs
    Isotopes
    Water springs > Geothermal springs > Hydrothermal springs
    Mid-Atlantic Ridge [Marine Regions]
    Marien/Kust
Author keywords
    hydrothermal vents; food web; stable isotope; Mid-Atlantic Ridge
Auteurs  Top 
  • Colaço, A.
  • Dehairs, F.A.
  • Desbruyères, D.
Abstract
    Nutritional relations among invertebrates from the hydrothermal vent fields at the Mid Atlantic Ridge (MAR) were studied via the carbon and nitrogen stable isotope approach. A large number of specimens of different vent species from different MAR vent fields were analysed, providing a general picture of the community structure. The isotopic composition at each vent field presents the same general trend. There is an obvious dichotomy of the trophic structure, with the mussels being significantly depleted in 13C and shrimps being significantly enriched in 13C. MAR and Pacific vent fields present the same picture, despite a different species composition. Primary consumers are divided into main groups according to their d13C signature: >-15 (shrimps) and <-20‰ (mussels). Vent predators are tightly linked to one or the other group, but a mixed diet cannot be excluded. Bathyal species are top predators, making incursions into the vent fields to profit from the large biomass. Taking into account the above associations, a descriptive trophic model was elaborated. At the base of the food chain the chemolithotrophic bacteria predominate. Four trophic levels were then distinguished: primary consumers, feeding only on bacteria; mixotrophs feeding on bacteria and small invertebrates; vent predators feeding only on small invertebrates; and finally top predators that are mainly constituted by deep-sea fauna.
Alle informatie in het Integrated Marine Information System (IMIS) valt onder het VLIZ Privacy beleid Top | Auteurs 
STARDUST II is a project funded by the INTERREG III A programme (France/Walloon Region/Flanders French-Flemish subprogramme) of the European Community's Regional Development Fund.
Hosted by the Flanders Marine Institute (VLIZ)