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Marine Ecology Progress Series

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MEPS - Vol. 376 - Feature article
Fast Repetition Rate fluorometer (at left) attached to a CTD rosette sampler being deployed in the Celtic Sea. Photo: Young-Nam Kim

Suggett DJ, Moore CM, Hickman AE, Geider RJ


Interpretation of fast repetition rate (FRR) fluorescence: signatures of phytoplankton community structure versus physiological state


Fast Repetition Rate (FRR) fluorometry is now used routinely in aquatic studies for determining in situ photosynthetic activity (and ultimately productivity) in phytoplankton. FRR has revolutionised the study of aquatic photosynthesis. FRR measurements have primarily been used as a diagnostic of physiological stress. Suggett and co-authors present a synthesis of datasets from the world’s oceans and from laboratory-grown algae, and show that FRR measurements vary with changes in phytoplankton community structure. To address key ecological and physiological questions, fluorescence-based investigations of mixed populations must therefore account for variation in community structure.


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