CS29 Phytoplankton & Primary Production
Date: Monday, June 10, 2002
Time: 2:15:00 PM
Location: Oak Bay
RickJJ, University of Louisiana, Lafayette, USA, HansRick@louisiana.edu
Rick, S, , University of Louisiana, Lafayette, USA, Silke.Rick@t-online.de
Duerselen, C, D, ICBM, Oldenburg, Germany, Duerselen@icbm.de
Chlorophyll and primary production in the German Bight, North Sea
The German Bight is a coastal area in the southeastern North Sea, which is dominated by a high nutrient rich fresh water discharge from the Elbe River. Within the interdisciplinary program KUSTOS (Coastal mass and energy fluxes - the land-sea transition in the southeastern North Sea - a German contribution to LOICZ) extensive field campaigns were carried out in the mid nineties in this area. In spring, summer and winter chlorophyll and primary production data were measured during grid (30 stations) and long-term drift experiments (30-40 stations). During spring surface chlorophyll concentrations were in the range from 2 to 40 ug Chl l-1 with daily production values from 0.7 to 15.8 gC m-2 d-1. In summer we measured 2 to 17 ug Chl l-1 and 1.8 to 16.8 gC m-2 d-1, while in winter the values dropped sharply to 1 to 3 ug Chl l-1 and 0.01 to 0.65 gC m-2 d-1 respectively. Based on these data we calculated a yearly primary production capacity of the German Bight system in the range of 300 to 400 g C m-2 y-1.