Journal article

Net growth rates of picocyanobacteria and nano-/microphytoplankton inhabiting shelf waters of the central (17 degrees S) and southern (20 degrees S) Great Barrier Reef

ND Crosbie, MJ Furnas

Aquatic Microbial Ecology | INTER-RESEARCH | Published : 2001

Abstract

Growth rates of diffusion cultures of nano- and microphytoplankton from Great Barrier Reef shelf water, especially diatoms (μ = 3.2 doublings d ), exceeded those of picocyanobacteria (Prochlorococcus and Synechococcus) when DIN (NH + NO + NO ) concentrations were ≥0.05 μM. The picocyanobacteria (μ = 1.1 and 1.6 doublings d for Prochlorococcus and Synechococcus respectively) achieved higher relative and absolute growth rates when time-averaged DIN concentrations were <0.05 μM. Most estimates (71 %) of in situ growth rates of nano-/microphytoplankton were ≤0.25 of μ when DIN concentrations were <0.1 μM, while only 18 % of in situ picocyanobacteria growth rates were ≤0.25 of μ when DIN c..

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