32 
3 Das Okosystemmodell ECOHAM2 
surface 
1 
- build-up of shells 
6, 
- exsudation of LDOC/ SDOC 
17 
- excretion of LDOC 
2, 22 
- dissolution of shells 
7, 10, 15 
- grazing 
19 
- air-sea exchange 
3 
- net primary production 
9, 14 
- egestion + mortality 
20 
- river input 
4, 13 
- respiration 
11,16 
- decay of LDOC/SDOC 
21 
- benthic remineralisation 
5, 8 
- mortality 
12 
- uptake of LDOC 
23 
- sinking 
Abb. 3.10: Diagramm des Stickstoffkreislaufs in ECOHAM2.