期刊
HARMFUL ALGAE
卷 38, 期 -, 页码 95-100出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.hal.2014.05.010
关键词
Net community production; Respiration; Karenia brevis
资金
- Center for Oceans and Human Health at the University of Miami
- ECOHAB Florida program of the National Oceanic and Atmospheric Administration
- NIEHS [1 P50 ES12736]
- NSF [OCE0432368/0911373]
- NOAA [NA06NOS4780246]
The diel change in dissolved oxygen concentrations were recorded with an automated incubator containing a pulsed oxygen sensor in Sarasota Bay, Florida. The deployments occurred during a 'pre-bloom' period in May to June 2006, and during a harmful algal bloom dominated by Karenia brevis in September 2006. The diurnal (daylight) increase in dissolved oxygen concentrations varied from 16 to 104 mu mol O-2 l(-1) with the corresponding nocturnal decrease in oxygen varying from 16 to 77 mu mol O-2 l(-1). Nocturnal respiration consumed 42-113% of the diurnal net oxygen production with the minimum and maximum during the pre-bloom period. Hourly production rates closely followed fluctuations in irradiance with maximum rates in the late morning. Hourly oxygen utilization rates (community respiration) at night were highest during the first few hours after sunset. (C) 2014 Elsevier B.V. All rights reserved.
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