Comparative diel oxygen cycles preceding and during a Karenia bloom in Sarasota Bay, Florida, USA

Gary L Hitchcock, Gary Kirkpatrick, Peter V Z Lane, Christopher Langdon

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

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 104μmolO2l-1 with the corresponding nocturnal decrease in oxygen varying from 16 to 77μmolO2l-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.

Original languageEnglish
Pages (from-to)95-100
Number of pages6
JournalHarmful Algae
Volume38
Issue numberC
DOIs
StatePublished - 2014

Keywords

  • Karenia brevis
  • Net community production
  • Respiration

ASJC Scopus subject areas

  • Aquatic Science
  • Plant Science

Fingerprint Dive into the research topics of 'Comparative diel oxygen cycles preceding and during a Karenia bloom in Sarasota Bay, Florida, USA'. Together they form a unique fingerprint.

  • Cite this