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Effects of Water Velocity on Respiration, Calcification, and Ammonium Uptake of a Porites compressa Community

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Title: Effects of Water Velocity on Respiration, Calcification, and Ammonium Uptake of a Porites compressa Community
Authors: Atkinson, M.J.
Kotler, E.
Newton, P.
Issue Date: Jul 1994
Publisher: University of Hawaii Press
Citation: Atkinson MJ, Kotler E, Newton P. 1994. Effects of water velocity on respiration, calcification, and ammonium uptake of a Porites compressa community. Pac Sci 48(3): 296-303.
Abstract: Colonies of Porites compressa Dana were placed in a 10-m-long
flume to form a community of coral. Ammonium uptake (N uptake) rate,
respiration rate, and calcification rate were measured at different water velocities,
ranging from 1 to 57 cm sec-1. N uptake was proportional to concentration
from 20 to 0.15 uM N. The first-order rate constant for N uptake varied
from 6.8 to 15.6 day-1, only an average of 2.1 times over a l0-fold change in
water velocity. First-order rate constants for respiration were less than those for
N uptake and ranged from 4.8 to 6.6 day-1. Respiration rate and calcification
rate were not correlated with water velocity. The relative turnover of N compared
with oxygen (O2) indicates that 94-98% of N flux must be retained
within this coral community.
URI/DOI: http://hdl.handle.net/10125/2239
ISSN: 0030-8870
Appears in Collections:Pacific Science Volume 48, Number 3, 1994



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