50
Bastiaan Knoppers . Bjorn Kjerfve
Chlorophyll a (mg m- 3 )
1991
I 1992
1988
1989
2
• ARA
200
URU
•
/"-....... 100
. J\
'....-.-.-. ....... ..-.
... __ ...... .1
\
0
A
A
0
D
F
0
A
0
D
F
A
1988
1989
1985
1986
200
FOR
200
GUA
100
100
•
I~·-··
~---.---..... ---...
.. ~ ... -..
0
•••
•
0
.. --.....
A
0
D
F
A
J
A
0
D
F
A
J
1991
1992
1990
L
1991
400
BAR
400
/.~ MAR
,.
200
.-\
200
/'.---...........
.\
/ ................ ~
~
.
0
5
N
M
M
0
A
0
D
F
A
Q31989
DW(gm- 3 )
1989
1990
1983
I
1984
20
PIR
600 20
CON
x------xDiN---x
400
10
x
10
., J'~.\
". ,. 200
•
x-x~
. . _ ......... I
•
..-.
0
D
F
A
J
0 0
A
0
D
F
A
1970
I
1971
1989
1990
20
20
or
CAN
PAE
10
,?--j\ ,~
10
I", ~
•
0
• ••
•
0
...... ~/ -. . ~ ...
A
0
D
F
A
A
0
D
F
Months
Months
Fig. 3.9. Seasonal distribution of chlorophyll a (mg m-3) in Araruama L. (ARA), Urussanga L. (URU),
Flora L. (FOR), Guarapina L. (GUA), Barra L. (BAR), Marica L. (MAR), Piratininga L. (PIR), Concei.,ao L.
(CON), Canant'ia L. (CAN), and the estuary of Patos L. (PAE)
seems to represent an important pool for the regeneration of nutrients for the sustenance of primary production in the spring (Moreira and Knoppers 1990; Knoppers
and Moreira 1990; Carmouze et al. 1991, 1993; Abreu et al. 1994a,b). The presence of
large suspended detrital pools has been corroborated for Barra L., Guarapina L.,
Urussanga L., Flora L., and Concei«ao L. by direct comparison between the standing