Phytoplankton pigment concentrations during POLARSTERN cruise ANT-XXVII/2 ...

Photophysiological processes as well as uptake characteristics of iron and inorganic carbon were studied in inshore phytoplankton assemblages of the Western Antarctic Peninsula (WAP) and offshore assemblages of the Drake Passage. Chlorophyll a concentrations and primary productivity decreased from i...

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Bibliographic Details
Main Author: Bracher, Astrid
Format: Dataset
Language:English
Published: PANGAEA 2015
Subjects:
Event label
Number
Campaign
Sample code/label
Sample, optional label/labor no
Device type
DEPTH, water
DATE/TIME
LATITUDE
LONGITUDE
Chlorophyll a
Chlorophyllide a
Chlorophyll b
Chlorophyll c1+c2
Chlorophyll c3
19-Butanoyloxyfucoxanthin
19-Hexanoyloxyfucoxanthin
Alloxanthin
Diadinoxanthin
Diatoxanthin
Fucoxanthin
Neoxanthin
Peridinin
Zeaxanthin
Carotene
Pheophytin a
Pyropheophorbide a
Pyropheophytin a
CTD/Rosette
Water sample
High Performance Liquid Chromatography HPLC
ANT-XXVII/2
Polarstern
Physical Oceanography @ AWI AWI_PhyOce
Antarc*
Antarctic
Antarctic Peninsula
Antarctica
Drake Passage
Online Access:https://dx.doi.org/10.1594/pangaea.848590
https://doi.pangaea.de/10.1594/PANGAEA.848590
Description
Summary:Photophysiological processes as well as uptake characteristics of iron and inorganic carbon were studied in inshore phytoplankton assemblages of the Western Antarctic Peninsula (WAP) and offshore assemblages of the Drake Passage. Chlorophyll a concentrations and primary productivity decreased from in- to offshore waters. The inverse relationship between low maximum quantum yields of photochemistry in PSII (Fv/Fm) and large sizes of functional absorption cross sections (sigma PSII) in offshore communities indicated iron-limitation. Congruently, the negative correlation between Fv/Fm values and iron uptake rates across our sampling locations suggest an overall better iron uptake capacity in iron-limited pelagic phytoplankton communities. Highest iron uptake capacities could be related to relative abundances of the haptophyte Phaeocystis antarctica. As chlorophyll a-specific concentrations of humic-like substances were similarly high in offshore and inshore stations, we suggest humic-like substances may play an ...

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