d) Nutrient enrichment 
ii) Nutrients and algal blooms 
Dynamics of Phaeocystis blooms 1988 - 1991 
in nutrient-enriched coastal 
zones 
Helgoland Roads time series 
measurement 
Time series measurement of 
the Wadden Sea of Sylt 
Dynamics of plant nutrient 
concentration and primary 
production in the German Bight 
Mathematical model about the A.86 - 6.88 
energy transport and substance 
transport through the lower 
trophical levels of the 
pelagic ecosystem of the 
North Sea 
(see also Project 
'Eutrophication of the North Sea 
and the Baltic Sea') 
L 
since 1973 
7.86 - 6.88 
1. EEC 
2. BAH 
2. BAH 
2. BAH 
1. UBA 
2. Uni HH: 
IfM 
3. Radach 
1. DFG 
2. Uni HH: 
IfM 
3. Radach 
EEC sponsored R & D programme on ecosystem 
research. The quantitative significance of 
this important alga within the coastal water 
ecosystem is being investigated. 
Daily measurements (Mo - Fr) include inorganic 
nutrients, hydrographic parameters, and phyto 
plankton (since 1962). 
Weekly measurements comprise the numbers of 
marine, freshwater, oil-degrading and luminescent 
bacteria, the abundance of yeasts, values of 
surface tension, oxygen, biological oxygen 
demand, and total organic carbon (since 1962). 
Further studies are directed towards mesoplankton 
and macrozooplankton (since 197M and the 
abundance of Noctiluca miliaris (since 1981). 
Twice a week inorganic nutrients, seston and 
its organic component, phytoplankton and zoo 
plankton biomass and species composition, are 
measured in relation to hydrographic conditions.