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Photosynthetic measurements in the central North Pacific: The dark loss of carbon in 24‐h incubations 1
Author(s) -
Eppley Richard W.,
Sharp Jonathan H.
Publication year - 1975
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1975.20.6.0981
Subject(s) - noon , ocean gyre , photosynthesis , respiration , bicarbonate , oceanography , botany , chemistry , environmental science , biology , atmospheric sciences , geology , ecology , subtropics , organic chemistry
Half‐day incubations (noon‐sunset) and 24‐h incubations (noon–noon) with 14 C‐labeled bicarbonate gave similar values for net primary production in the central gyre of the North Pacific (ca. 28°N, 155°W). Photosynthetic rates per light hour were nearly twice as high in 6‐h as in 24‐h incubations. The discrepancy seems to be due largely to dark respiration in the 24‐h incubations, and the data can be used to estimate dark loss of 14 C.