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Respiration in Aquatic Ecosystems$
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Paul del Giorgio and Peter Williams

Print publication date: 2005

Print ISBN-13: 9780198527084

Published to Oxford Scholarship Online: September 2007

DOI: 10.1093/acprof:oso/9780198527084.001.0001

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Respiration and its measurement in surface marine waters

Respiration and its measurement in surface marine waters

(p.147) CHAPTER 9 Respiration and its measurement in surface marine waters
Respiration in Aquatic Ecosystems

Carol Robinson

Peter J. le B. Williams

Oxford University Press

This chapter reviews current knowledge of the process and measurement of microplankton respiration in marine surface waters. The principal approaches are outlined and their potentials and limitations discussed. A global database, containing 1,662 observations has been compiled and analysed for the spatial and temporal distribution of surface water respiration. The database is tiny compared to that of photosynthesis and biased with respect to season, latitude, community structure, and depth. Measurements and models show that the major portions of respiration lies in that attributable to bacteria (12-59%) and to algae (8-70%). The mean of the volumetric rates of respiration in the upper 10 m of the open ocean is 3.3±0.15 mmol O2/m3-d and that of depth-integrated open-ocean respiration 116±8.5 mmol O2/m2-d. A global estimate of 13.5 Pmol O2/a is derived from the mean depth-integrated rate, which significantly exceeds contemporary estimates of ocean plankton production (2.3-4.3 Pmol O2/a).

Keywords:   microplankton respiration, surface water respiration, photosynthesis, global respiration rates

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