TY - JOUR
AU - Nash, Geraldine
AB - Filter fractionated picophytoplankton from Antarctic coastal waters (summer 2001) represented only 7–33% of total phytoplankton, even though total stocks were low (average Chl a = 0.32 μg l−1, range = 0.13–1.03 μg l−1). Though all cells passed a 2 μm filter, electron microscopy revealed most cells were over 2 μm, principally Parmales, Phaeocystis sp., and small diatoms. CHEMTAX analysis of HPLC pigment data suggested type 8 haptophytes (e.g. Phaeocystis sp. plus Parmales and pelagophytes) contributed 7–58% of picoplanktonic chlorophyll a, type 6 haptophytes (e.g. coccolithophorids) 18–59%, diatoms 0–18% (mostly type 2 diatoms, e.g. Pseudonitzschia sp., 0–15%), prasinophytes 0–17%, with cell fragments of cryptophytes 0–40%, and dinoflagellates 0–11%. Only stocks of type 8 haptophytes and prasinophytes differed significantly due to successional changes. Zeaxanthin concentrations exceeded estimates from previous cyanobacterial counts and may derive from non-photosynthetic bacteria.
TI - Composition and significance of picophytoplankton in Antarctic waters
JF - Polar Biology
DO - 10.1007/s00300-009-0582-9
DA - 2009-02-06
UR - https://www.deepdyve.com/lp/springer-journals/composition-and-significance-of-picophytoplankton-in-antarctic-waters-r9OlUimfom
SP - 797
EP - 808
VL - 32
IS - 5
DP - DeepDyve
ER -