Chloroplast protein and centrosomal genes, a tRNA intron, and odd telomeres in an unusually compact eukaryotic genome, the cryptomonad nucleomorph.
Demonstration of nucleomorph-encoded eukaryotic small subunit ribosomal RNA in cryptomonads. Mol.
For example, some cyanobacteria are inedible or toxic to some zooplankton species (e.g., Kirk and Gilbert 1992), while some flagellates such as cryptomonads are edible and nutritious for many zooplankton (Stewart and Wetzel 1986).
In these experiments, the natural phytoplankton assemblage was supplemented with laboratory-grown phytoplankton species (cryptomonads) known to be high-quality foods for the rotifers investigated, and the responses of the rotifer populations were quantified.
Although much smaller, the cryptomonad
plastid genome contains extensive synteny groups that are clearly recognizable and provide excellent evidence for the red algal ancestry of the cryptomonad
plastid [ILLUSTRATION FOR FIGURE 1 OMITTED].
were grown on modified MBL medium (Stemberger 1981) at 19 [degrees] C (L/D 16:8).
, cyanobacteria, chlorophytes, and chrysophytes all showed strong interaction effects, with the highest biovolumes in the gizzard shad + access treatment (Fig.
Moreover, essential HUFA are abundant in cryptomonads
and diatoms but are absent in cyanobacteria or present in only trace amounts (Ahlgren et al.
Before analysis, periphyton genera were grouped into the following categories; blue-green algae, green algae, cryptomonads
, diatoms, dinoflagellates, red algae, and "total" (the combination of all groups).
However, suspension-feeding rotifers are often food limited, as indicated by the positive correlation of rotifer birth rate with the abundance of phytoplankton, especially cryptomonads
, which are known to be an important food source (Edmondson 1965).
and Kathablepharis ovalis are highly edible food sources for rotifers and Daphnia, they were not affected by the presence of redbelly dace.
In this case, the dose of toxin received by the rotifers might be higher than expected, and the amount of toxin associated with the cryptomonads
might vary with temperature.
The phytoplankton of Wintergreen Lake tends to be dominated by cryptomonads
, Chlamydomonas, and other small flagellated algae in spring; by midsummer the phytoplankton shifts to large blue-green algae (e.g., Anabaena, Aphanizomenon, and Microcystis).