Abstract
A series of time-course studies were made in conjunction with productivity measurements to determine: (1) the time required for purging sorbed H14CO3- from glass fiber filters, (2) the duration of linearity in H14CO3- uptake in several oceanic environments, and (3) the time required for an "equilibrium" to be established among solvent-extractable and particulate fractions of natural phytoplankton populations. Acidification of sorbed H14CO3- on Whatman GF F filters requires a 60-min period before the sorbed label is reduced to background levels. Time course measurements of H14CO3- fixation in three regions of the northwestern Atlantic (two warm-core rings and the Sargasso Sea) indicated that carbon uptake was linear for at least 4-6 h. The distribution of 14C among various soluble and particulate fractions of labelled natural phytoplankton populations showed that an "equilibrium" was achieved among the various fractions after 1 to 2 h of incubation.
Original language | English (US) |
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Pages (from-to) | 233-243 |
Number of pages | 11 |
Journal | Journal of Experimental Marine Biology and Ecology |
Volume | 95 |
Issue number | 3 |
DOIs | |
State | Published - 1986 |
Keywords
- phytoplankton productivity
- productivity methodology
- time-course studies
ASJC Scopus subject areas
- Aquatic Science
- Ecology, Evolution, Behavior and Systematics
- Ecology