ATP, chlorophyll a, and size structure of phytoplankton in seawater at stations in the Atlantic sector of the Southern Ocean

Chlorophyll "a" and adenozine triphosphate (ATP) concentrations together with size structure of microplankton were investigated in January-April 1989 in the Indian Ocean and in the Weddell Sea. ATP values varied from 11 to 92 ng/l, and chlorophyll "a" concentrations varied from 0...

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Bibliographic Details
Main Author: Lopukhin, A S
Format: Dataset
Language:English
Published: PANGAEA 1993
Subjects:
Archive of Ocean Data
ARCOD
DM43
DM43-4080W
DM43-4082W
DM43-4083W
DM43-4084W
DM43-4099W
DM43-4100W
DM43-4102W
DM43-4103W
DM43-4104W
DM43-4105W
DM43-4107W
Dmitry Mendeleev
Southern Ocean
Water sample
WS
Indian
Weddell
Weddell Sea
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.759507
https://doi.org/10.1594/PANGAEA.759507
Description
Summary:Chlorophyll "a" and adenozine triphosphate (ATP) concentrations together with size structure of microplankton were investigated in January-April 1989 in the Indian Ocean and in the Weddell Sea. ATP values varied from 11 to 92 ng/l, and chlorophyll "a" concentrations varied from 0.04 to 0.27 µg/l in the Indian Ocean, with prevailing nanoplankton and picoplankton fractions. Both ATP and chlorophyll "a" concentrations increased 2 times to the south of 40°S; in the Weddell Sea they exceeded 400 ng/l and 0.6 µg/l, respectively. Cells of nanophytoplankton and microphytoplankton (mainly diatoms) prevailed in size spectra. Spatial variabilities of the parameters were within one order of magnitude; their values decreased 3-4 times during 1 month. Size structure changed due to increased portion of nanoplankton and picolankton. ATP concentrations in the photic layer (0-200 m) varied from 31.96 mg/m**2 in February to 8.02 mg/m**2 in March to April. ATP concentrations were 61.5 and 98.8 mg/m**2 at depths of 4200 and 4700 m, respectively.

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