Table 1.
Mixotrophic flagellates investigated in this study.
| Phylum | Class | Genus/Cladea (abbreviation) | Isolates | Source depths (m) | Collection dates (yyyy/mm) | ESDb (µm) | Number tested for grazing ratec | Number tested for functional responsed |
|---|---|---|---|---|---|---|---|---|
| Ochrophyta | Dictyochophyceae | Florenciella | 19 | 25, 75, 100 | 2011/03, 2014/09, 2019/02, 2019/05 | 3.0–4.3 | 12 | 1 |
| Rhizochromulina | 4 | 25, 75 | 2019/05 | 3.0–3.2 | 4 | 1 | ||
| Dictyochophyceae-X (DictyX) | 6 | 25, 100 | 2015/02, 2019/02, 2019/05 | 4.0–5.3 | 5 | 1 | ||
| Bolidophyceae | Triparma | 2 | 25, 100 | 2019/05 | 2.5–2.7 | 2 | 0 | |
| Chrysophyceae | Chrysophyceae-H (ChrysoH) | 3 | 25 | 2019/05 | 2.2–2.4 | 3 | 1 | |
| Haptophyta | Prymnesiophyceae | Chrysochromulina | 2 | 5, 45 | 2012/01, 2015/08 | 3.8–4.3 | 2 | 1 |
| unclassified | Haptophyta-2 (Hap2) | 1 | 25 | 2019/02 | 4.5 | 1 | 1 | |
| Cercozoa | Chlorarachniophyceae | Chlorarachniophyceae-X (ChloraX) | 1 | n/a | 2011/03 | 3.8 | 1 | 0 |
| Myzozoa | Dinophyceae | Pelagodinium | 1 | 25 | 2019/05 | 4.0 | 1 | 0 |
aDictyX, Hap2, ChrysoH, and ChloraX are abbreviations for the undescribed or environmental clades of Dictyochophyceae-X, Haptophyta clade HAP-2, Chrysophyceae clade H, and Chlorarachniophyceae-X, respectively, which cluster at approximately the genus level.
bESD equivalent spherical diameter.
cNumber of individual isolates of each type for which grazing rates were calculated at one or more prey concentration. Eight additional isolates (seven Florenciella, one DictyX) were observed to consume Prochlorococcus, but rates were not calculated, because of low sampling frequency.
dNumber of isolates of each type for which grazing rates were measured at multiple prey concentrations to determine the grazing functional response and estimate grazing parameters Cmax and Imax.