Long-term trends in phytoplankton composition in the western and central Baltic Sea Flanders Marine Institute
The phytoplankton biomass data of the period 19792005 of the Belt Sea area and the Baltic Proper, separated into spring, summer and autumn data, were checked for trends, together with the relevant abiotic factors (temperature, salinity, and nutrient concentrations). The MannKendall test was used for detecting monotonic trends over the whole investigation period or, if trend breaks occurred, over the period before and after the trend breaks. The ...