Abstract
The distribution of copepod taxa at a basin scale was analysed using three Atlantic transects (U.K. - Malvinas 1997, Malvinas - U.K. 1997, and South Africa - U.K. 1998). Integrated 200 m to surface zooplankton samples were taken daily, using WP2 nets (200-μm mesh). The zooplankton were size-fractionated and sub-samples taken for carbon analysis. The remainder of the samples was preserved for taxonomic analysis of copepod genera. Multidimensional scaling (MDS) was used to identify zoogeographic regions from the copepod genera. Seven regions were identified: northern temperate, northern subtropical, equatorial, southern tropical, southern sub-tropical, southern temperate and Benguela upwelling. Analysis of similarity showed that most regions were significantly different from each other except: northern temperate and southern temperate, northern temperate and southern subtropical, and northern subtropical and southern subtropical. The genera significant in determining the regions were identified. These regions were compared to other schemes of biological and hydrographic areas. The MDS also showed that the copepod composition in the tropical and subtropical regions was less variable than the temperate and Benguela stations. Latitudinal trends in diversity and size were also investigated. Copepod genera showed a reduction in richness at higher latitudes. Copepod size did not show any substantial or consistent change with latitude along these transects, as demonstrated by both the numerical abundances in each size category, and the carbon biomass per individual. The proportion in each size fraction was quite uniform over the transect.
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Woodd-Walker, R.S. (2001). Spatial distributions of copepod genera along the Atlantic Meridional Transect. In: Lopes, R.M., Reid, J.W., Rocha, C.E.F. (eds) Copepoda: Developments in Ecology, Biology and Systematics. Developments in Hydrobiology, vol 156. Springer, Dordrecht. https://doi.org/10.1007/0-306-47537-5_14
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DOI: https://doi.org/10.1007/0-306-47537-5_14
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