Over het archief
Het OWA, het open archief van het Waterbouwkundig Laboratorium heeft tot doel alle vrij toegankelijke onderzoeksresultaten van dit instituut in digitale vorm aan te bieden. Op die manier wil het de zichtbaarheid, verspreiding en gebruik van deze onderzoeksresultaten, alsook de wetenschappelijke communicatie maximaal bevorderen.
Dit archief wordt uitgebouwd en beheerd volgens de principes van de Open Access Movement, en het daaruit ontstane Open Archives Initiative.
Basisinformatie over ‘Open Access to scholarly information'.
Geochemistry, faunal composition and trophic structure in reducing sediments on the southwest South Georgia margin
Bell, J.B.; Aquilina, A.; Woulds, C.; Glover, A.G.; Little, C.T.S.; Reid, W.D.K.; Hepburn, L.E.; Newton, J.; Mills, R.A. (2016). Geochemistry, faunal composition and trophic structure in reducing sediments on the southwest South Georgia margin. Royal Society Open Science 3(9): 160284. http://dx.doi.org/10.1098/rsos.160284
In: Royal Society Open Science. The Royal Society: London. ISSN 2054-5703; e-ISSN 2054-5703, meer
|   |
| Trefwoord |
|
| Author keywords |
methane; Southern Ocean; ecology; assemblage composition;trophodynamics; authigenic carbonates |
| Auteurs | | Top |
- Bell, J.B.
- Aquilina, A.
- Woulds, C.
|
- Glover, A.G., meer
- Little, C.T.S.
- Reid, W.D.K.
|
- Hepburn, L.E.
- Newton, J.
- Mills, R.A.
|
| Abstract |
Despite a number of studies in areas of focused methane seepage, the extent of transitional sediments of more diffuse methane seepage, and their influence upon biological communities is poorly understood. We investigated an area of reducing sediments with elevated levels of methane on the South Georgia margin around 250 m depth and report data from a series of geochemical and biological analyses. Here, the geochemical signatures were consistent with weak methane seepage and the role of sub-surface methane consumption was clearly very important, preventing gas emissions into bottom waters. As a result, the contribution of methane-derived carbon to the microbial and metazoan food webs was very limited, although sulfur isotopic signatures indicated a wider range of dietary contributions than was apparent from carbon isotope ratios. Macrofaunal assemblages had high dominance and were indicative of reducing sediments, with many taxa common to other similar environments and no seep-endemic fauna, indicating transitional assemblages. Also similar to other cold seep areas, there were samples of authigenic carbonate, but rather than occurring as pavements or sedimentary concretions, these carbonates were restricted to patches on the shells of Axinulus antarcticus (Bivalvia, Thyasiridae), which is suggestive of microbe–metazoan interactions. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
