Figure 1.
Occurrence of Synechococcus spp. in field-collected zooplankton.
Individual gut content (GC; prey ITS-1 copies ×103 ind−1) and size-specific gut content (ssGC; prey ITS-1 copies ×103 µgWW−1) in main zooplankton groups: copepods (adults and older copepodites of Acartia spp. and Eurytemora affinis), cladocerans (Bosmina maritima and Podon spp.) and microzooplankton (rotifers Synchaeta spp., Keratella quadrata, and K. cochlearis, and copepod nauplii). Data are shown as mean ± SD, number of samples is given below the group name.
Table 1.
Synechococcus abundance (ITS-1 copies ×103 ind−1) detected in different mesozooplankton species/groups.
Table 2.
Statistical summary of the generalized linear model examining effects of Synechococcus abundance (ITS-1 copies ×103 ml) −1 and total phytoplankton (>2 µm) biovolume (mm3 ml−1) in the water column (0–14 m) on the abundance of Synechococcus DNA in copepod stomachs (ITS-1 copies ×103 ind−1).
Figure 2.
Quantities of Synechococcus bacillaris (ITS-1 copies ×103 ind−1and cells ×103 ind−1) detected in the live and dead individuals of the copepod Acartia tonsa (adults and nauplii) exposed to the picocyanobacterium in the feeding experiments (Experiments I and II).
Data are shown as mean ± SD, n = 3 in all cases.
Figure 3.
Carbon uptake from 13C-labeled Synechococcus bacillaris by the copepod Acartia tonsa (live and dead individuals) exposed to the picocyanobacterium (Experiment III).
Carbon uptake is expressed as change in δ13C of the copepods from the start values. Differences between the start and each treatment group are shown by asterisks (*: p<0.05; ***: p<0.0001). Data are shown as mean ± SD, n = 3 in all cases.