CALCULATION OF CELL-SPECIFIC GROWTH-RATES - A CLARIFICATION

Citation
Mj. Mccormick et al., CALCULATION OF CELL-SPECIFIC GROWTH-RATES - A CLARIFICATION, Limnology and oceanography, 41(1), 1996, pp. 182-189
Citations number
18
Categorie Soggetti
Oceanografhy,Limnology
Journal title
ISSN journal
00243590
Volume
41
Issue
1
Year of publication
1996
Pages
182 - 189
Database
ISI
SICI code
0024-3590(1996)41:1<182:COCG-A>2.0.ZU;2-0
Abstract
Cell-specific growth and cell-specific production estimates of phytopl ankton have been calculated in the past by a simple exponential model (constant uptake-division) that describes the time rate change of carb on, C, and assumes both continuous division and continuous uptake. We propose three new models (variable uptake-division, variable uptake-c onstant division, and diurnal) for making more accurate estimates of t he algal growth rate, mu. The variable uptake-division model is the mo st complex and requires species-specific information on the division p attern. The diurnal model can provide accurate mu estimates while requ iring only two measurements of C and no other parameters, but it requ ires 48-h incubation times. The variable uptake division and variable uptake-constant division models require additional work compared to th e constant uptake-division model, but the effort mis warranted because they also provide a direct approach for quantifying the dependence of mu on the photoperiod and thus enable greater confidence in applying mu to ecological studies, in which the light climate may differ from t hat of the experiment.