101
9 Photoautotrophic Productivity in Eutrophic Ecosystems
Fig. 9.1 Fitting annual primary production to spring total
phosphorus concentration. The
equation, 95 % confidence limits
(C.L.) and approximate trophic
delineation are given in the
diagram. (Modified from Klapper
1992)
InA = 0.954 InChla + 2.989
N = 214, r 2 = 0.81, p<0.001
10000
Average euphotic zone rate [A, mg C m -3
d -1
]
1000
100
10
1
0.1
0.1
1
10
100
Fig. 9.2 Dependence of average
daily euphotic zone production
rate (A) on chl-a using data from
Kimmel et al. 1990; Håkanson
and Boulion 2001; Dokulil 2005
and Dokulil et al. 2005. Log-log
plot. The equation, statistical data
and 95 % C.L. and trophic boundaries are inserted in the diagram