Fig. 2. Biplots of mean algal biomass (mg C
L-1) and zooplankton biomass (μg C
L-1) (a) and mean photosynthetic active radiation
(PAR, mol photon m-2 d-1) in the
water column and zooplankton/algae( H/P)mass ratio (b) during the experiment in no shade (blue), low shade
(orange), mid shade (red), and high shade (gray) treatments in pond 217
(circles) and 218 (squares). Bars denote standard errors on the means
(N = 7).
Fig. 3. H /P mass ratio plotted against mean
values of edible phytoplankton fraction (a), seston carbon to phosphorus
(C:P) ratio (b), specific production rate (c), and fish abundance (d)
during the experiment in no shade (blue), low shade (orange), mid shade
(red), and high shade (gray) treatments in pond 217 (circles) and 218
(squares). Bars denote standard errors on the means (N = 7).
Fig. 4. Partial regression leverage plots from multiple
regression analysis showing effects of log(C:P ratio of seston) (a),
log(Fraction of edible algae) (b), Log(Specific daily production) (c),
and Log(Fish+1) (d) on H/P mass ratio. The vertical axis
represents the partial residuals of H/P mass ratio and the
horizontal axis represents the partial residual of the specific
explanatory variable. Dashed and dotted lines in each panel represent
the partial regression line and its 95% confidence curves. Partial
correlation coefficients with p values are also inserted in each
panel. Data from four different treatments of pond 217 (circles) and 218
(squares) are denoted by different colors.