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| Titel |
Macrofaunal community inside and outside of the Darwin Mounds Special Area of Conservation, NE Atlantic |
| VerfasserIn |
N. Serpetti, E. Gontikaki, B. E. Narayanaswamy, U. Witte |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 10, no. 6 ; Nr. 10, no. 6 (2013-06-05), S.3705-3714 |
| Datensatznummer |
250018279
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| Publikation (Nr.) |
 copernicus.org/bg-10-3705-2013.pdf |
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| Zusammenfassung |
| Spatial distribution and patchiness of deep sea macrofaunal
communities were studied from samples collected in the Rockall Trough, NE
Atlantic. In June 2011, two areas, located outside and within the Darwin
Mound Special Area of Conservation (SAC), were sampled. Three megacores were
deployed in each area at approximately 900 m depth. The two areas,
~ 18 km apart, did not differ in terms of sediment organic matter and
percentage of mud content, but small significant differences were found in
sediment median grain size and depth. Macrofaunal communities were found to
differ significantly, with the difference mostly driven by changes in the
abundance of polychaetes, crustaceans and nematodes whilst no significant
differences were seen for the other phyla. Whereas overall macrofaunal
abundance was higher outside the SAC compared to within, this pattern varies
considerably between phyla. Diversity indices showed no significant
differences between protected and unprotected sites. Deep-water trawling
regularly take place outside the Darwin Mounds SAC whilst the area inside the
SAC has been closed to bottom trawling since 2004, and the above distribution
patterns are discussed in the context of both environmental and anthropogenic
causes. |
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