Cyclonic cold-core eddy in the eastern North Atlantic. 3. Zooplankton
Beckmann, W.; Auras, A.; Hemleben, Ch. (1987). Cyclonic cold-core eddy in the eastern North Atlantic. 3. Zooplankton. Mar. Ecol. Prog. Ser. 39(2): 165-173
In: Marine Ecology Progress Series. Inter-Research: Oldendorf/Luhe. ISSN 0171-8630; e-ISSN 1616-1599, more
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| Keywords |
Aquatic communities > Plankton > Zooplankton
Distribution
Environmental factors
Foraminifera
Motion > Water motion > Circulation > Water circulation > Ocean circulation > Oceanic eddies
Motion > Water motion > Circulation > Water circulation > Ocean circulation > Oceanic eddies > Current rings
Population characteristics > Population structure > Size distribution
Limacina retroversa (J. Fleming, 1823) [WoRMS]; Pteropoda [WoRMS]
Marine/Coastal |
| Authors | | Top |
- Beckmann, W.
- Auras, A.
- Hemleben, Ch.
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| Abstract |
Horizontal and vertical zooplankton distribution in a 1 mo old cold-core eddy in the eastern North Atlantic were investigated during May 1985. Samples were taken at 3 stations across the eddy down to 1000 m depth by vertical tows with a multiple opening/closing net using 2 different mesh sizes (100 and 300 mu m). Reference data were available for 3 other stations in ambient water. Special attention was paid to the distribution of pteropods and foraminiferans. In the center of the eddy distinctly high concentrations of the euthecosomatous pteropod Limacina retroversa were observed compared to the eddy periphery or the ambient water. Extremely high numbers of large specimens (> 600 mu m in height) were caught at depths between 100 and 400 m whereas smaller specimens (60 to 150 mu m in height) resided within the upper 100 m. In the eddy periphery small specimens prevailed and the population was restricted mainly to the upper 100 m of the water column. |
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