Spatio-temporal distribution of Oithona similis in the Bornholm Basin (Central Baltic Sea).

Hansen, F. C., Möllmann, C., Schütz, U. and Hinrichsen, Hans-Harald (2004) Spatio-temporal distribution of Oithona similis in the Bornholm Basin (Central Baltic Sea). Journal of Plankton Research, 26 . pp. 1-10. DOI 10.1093/plankt/fbh061.

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Oithona similis is an abundant but poorly studied cyclopoid copepod in the brackish Central Baltic Sea. We describe the spatio-temporal distribution of O. similis in a Central Baltic deep basin (Bornholm Basin) during spring and summer 1999. Using vertically resolving sampling in parallel with hydrographic measurements, we found the copepod to dwell in the permanent halocline characteristic of a Central Baltic deep basin. The habitat of O. similis is thus limited from above by low salinity and from below by low oxygen conditions, both characteristic for the area. Horizontally resolving sampling yielded abundance surfaces which were compared by analysis of variance showing similar patterns among sampling dates. Comparison with flow fields from a three-dimensional hydrodynamic model suggests that the horizontal distribution is primarily the result of circulation in the dwelling depth. The study shows how the physical environment in the area determines the spatial distribution which might affect abundance and production of this copepod.

Document Type: Article
Research affiliation: OceanRep > GEOMAR > FB3 Marine Ecology > FB3-EV Marine Evolutionary Ecology
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1093/plankt/fbh061
ISSN: 0142-7873
Date Deposited: 24 Mar 2009 16:41
Last Modified: 04 Jun 2018 12:07

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