90
.., .
E
z
4 ---------------- -------------- ---------------------- --------------3 ----;.;o.?\--------------- ------------ -- ----------------------...,' \
\
+ + \
I. De Vries et aI.
Fig. 3.5. Measured and simulated nitrate concentrations in Lake Grevelingen
(model segment 4, cf.
Fig 3.1) and Lake Veere
(model segment 2, cf.
Fig 3.2)
C)
2 _____________ .1. ______ ----------------- -.. --------------- ..
+
\
\
\
\
1 -------------4---------- . ---------\ \+ +
O~ ____ ~~'~-~-~~ ...... ~~ __ ~
o
100
200
days
300
400
Lake Veere
_____ simulation
• measurements
Lake Grevelingen - - - simulation + measurements
100r-----~~------------------------~
80 1---- - -,,1---- -- - -- - -
Chlorophyll a
.. eo ~ I\-~~~ ' " ---ftr20 ------7---~ - -
I"""\---~
,--'
\
' +
~-"
\
.. "' ....... ,. .... _/
"
o ... /'
.w._ •••
... + + +'
o
100
200
300
400
days
Lake Veere
----- simulation
• measurements
Lake Grevelingen ---- simulation
+ measurements
Fig. 3.6. Measured and simulated chlorophyll a concentrations in Lake Grevelingen
(model segment 4, cf. Fig.3.1 ) and Lake Veere (model segment 2, cf. Fig. 3.2 )
Lagoon may become limiting too, Sfriso and co-workers (1989b) have
proven that Uiva spp. in the lagoon are nitrogen-limited due to: (1) the
nutrient input into the lagoon which is relatively poor in nitrogen (NIP
ratio by atoms about 11 compared to the Redfield ratio of 16; see