School of Engineering and Science - Jacobs University

CHAPTER III
in words and deeds. Many thanks to the technical department of the BAH for all the
perfect “short notice” solutions and to Arne Malzahn for his technical support. Special
thanks also to the “Copepod Hunter” Katherina Schoo for catching and sorting out all
the copepods for our experiments. Furthermore thanks to the crews of the research
vessels Uthörn and Aade, Kristine Carstens, Silvia Janisch and last but not least the
whole team of the AWI Food Web Project.
APPENDIX
Table 1: Microzooplankton grazing g [d -1 ] and phytoplankton growth rates k [d -1 ] determined in four
dilution experiments for each prey category. Food saturation marked with gray background. Instantaneous
growth rate values µ 0 [d -1 ] from bottles without added nutrients. Percentage of initial stock P i [%] and
potential production grazed P p [%]. Negative P i and P p values resulting from negative g (P i ) or µ 0 (P p )
and were set to zero. The same was done for positive P p values resulting from negative g and µ 0 . MMC =
mean microzooplankton carbon biomass. P-values from linear regression analysis of apparent
phytoplankton growth against dilution factor (n = 36). * p < 0.05, ** p < 0.01, *** p < 0.001, **** p <
0.0001.
Table 2: Microzooplankton carbon specific filtration rates F c [L µgC predator -1 d -1 ] and carbon specific
ingestion rates I c [µgC prey µgC predator -1 d -1 ], total filtration rates F [L d -1 ], total ingestion rates I [µgC
prey L -1 d -1 ] and electivity E* [-] for each prey category. Positive selection marked with gray background.
MMC = mean microzooplankton carbon biomass. P-values are the same as for the grazing rates of
microzooplankton. * p < 0.05, ** p < 0.01, *** p < 0.001, **** p < 0.0001.
Table 3 a+b: Temora longicornis grazing g [d -1 ], phytoplankton and microzooplankton growth rates k
[d -1 ] determined in four grazing experiments for each prey category. Instantaneous growth rate values µ 0
[d -1 ] from dilution experiment bottles without added nutrients. Percentage of initial stock P i [%] and
potential production grazed P p [%]. Negative P i and P p values resulting from negative g (P i ) or µ 0 /k (P p )
were set to zero. The same was done for positive P p values resulting from negative g and µ 0 /k. TC = Total
T. longicornis carbon biomass. P-values derived from t-tests against zero.* p < 0.05, ** p < 0.01, *** p <
0.001, **** p < 0.0001.
Table 4 a+b: Temora longicornis carbon specific filtration rates F c [L µgC predator -1 d -1 ] and carbon
specific ingestion rates I c [µgC prey µgC predator -1 d -1 ], total filtration rates F [L d -1 ], total ingestion rates
I [µgC prey L -1 d -1 ] and electivity E* [-] for each prey category. Positive selection marked with gray
background. TC = Total T. longicornis carbon biomass. P-values derived from t-tests against zero.* p <
0.05, ** p < 0.01, *** p < 0.001, **** p < 0.0001.
94