Al-Mutairi, H. Kuwait Institute for Scientific Research, firstname.lastname@example.org
Landry, M. School of Ocean and Earth Science and Technology University of Hawaii, (808) 956 9516
EXPORT OF RESPIRATORY CARBON AND DISSOLVED INORGANIC NITROGEN BY DIEL-MIGRANT MESOZOOPLANKTON AT THE HAWAIIAN OCEAN TIME SERIES STATION ALOHA
The mesozooplankton community at Ocean Station ALOHA has been measured at approximately monthly intervals during 1994-1995. Parameters measured from mid-day and mid-night included oblique net tows to an average depth of 156 m, total and size fractionated dry weight, carbon and nitrogen biomasses and abundance. In addition one day and one night tow from each cruise were analyzed for community structure. Published allometric equations relating body mass and habitat temperature to carbon respiration and dissolved inorganic nitrogen excretion were used to calculate fluxes of both elements. Downward fluxes due to migrators crossing below the euphotic zone ranged from 0.08 to 0.75 and averaged 0.3 mmol per m2 per day for carbon and ranged from .01 to 0.11 and averaged 0.04 mmol per m2 per day for nitrogen. Day biomasses ranged from 0.22 to 1.02 with an average value of 0.54 g per m2 whereas the night biomass values ranged from 0.53 to 1.94 averaging 0.94 g per m2. Both biomass and fluxes due to migrators exhibited seasonal variations with the greatest values in summer and the lowest in winter. Calculated fluxes as a percentage of gravitational flux measured by free-floating sediment traps set at 150 m averaged 15 and 20 percent for carbon and nitrogen respectively.
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