JPR Advance Access originally published online on December 16, 2004
Journal of Plankton Research 2005 27(2):153-158; doi:10.1093/plankt/fbh166
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Journal of Plankton Research Vol. 27 No. 2 © Oxford University Press 2004; all rights reserved
A global assessment of mesozooplankton respiration in the ocean
1 Biological Oceanography Laboratory, Facultad de Ciencias del Mar, Campus Universitario de Tafira, 35017 Las Palmas de GC, Canary Islands, Spain and 2 Graduate School of Fisheries Sciences, Hokkaido University, 3-1-1 Minato-Cho, Hakodate 041-0821, Japan
* Corresponding Author: shernandez{at}dbio.ulpgc.es
Received July 9, 2004; accepted in principle August 11, 2004; accepted for publication November 25, 2004; published online December 16, 2004
Published data on the biomass and specific respiration rates of mesozooplankton in the oceans across all latitudes were combined to assess their community respiration on a global basis. Mesozooplankton biomass was higher in boreal/anti-boreal and polar waters, intermediate in equatorial waters and lowest in the subtropical gyres. Specific respiration rates were the highest in equatorial waters and decreased rapidly poleward. Global community respiration of mesozooplankton in the upper 200 m of the oceans integrated over all latitudes was 10.4 ± 3.7 (SE) Gt C year–1 (n = 838). Below the epipelagic zone, mesozooplankton respiration living in the mesopelagic (200–1000 m) and bathypelagic (below 1000 m) zones was estimated as 2.2 ± 0.4 (n = 57) and 0.40 ± 0.2 (n = 12) Gt C year–1, respectively. Thus, global depth-integrated mesozooplankton respiration was 13.0 ± 4.2 Gt C year–1 (17–32% of global primary production), which is 3–8-fold higher than the values assigned to mesozooplankton respiration in recent estimates of total respiration in the ocean. Thus, it appears that mesozooplankton represent a major, but neglected component of the carbon cycle in the ocean.
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