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Dissolved oxygen conditions in northern Gulf of Mexico estuaries

Environmental Monitoring and Assessment

By:
, , and
DOI: 10.1023/A:1005980410752

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Abstract

Because deficient dissolved oxygen (DO) levels may have severe detrimental effects on estuarine and marine life, DO has been widely used as an indicator of ecological conditions by environmental monitoring programs. The U.S. EPA's Environmental Monitoring and Assessment Program for Estuaries (EMAP-E) monitored DO conditions in the estuaries of the Gulf of Mexico from 1991 to 1994. DO was measured in two ways: 1)instantaneous profiles from the surface to the bottom were taken during the day, and 2) continuous measurements were taken near the bottom at 15 min intervals for at least 12 h. This information was summarized to assess the spatial distribution and severity of DO conditions in these estuaries. Depending on the criteria used to define hypoxia (DO concentrations usually < 2 mg L-1 or 15 mg L-1) and the method by which DO is measured, we estimate that between 5.2 and 29.3% of the total estuarine area in the Louisianian Province was affected by low DO conditions.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Dissolved oxygen conditions in northern Gulf of Mexico estuaries
Series title:
Environmental Monitoring and Assessment
DOI:
10.1023/A:1005980410752
Volume
57
Issue:
1
Year Published:
1999
Language:
English
Publisher:
Kluwer Academic Publishers
Publisher location:
Dordrecht, Netherlands
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Environmental Monitoring and Assessment
First page:
1
Last page:
20
Number of Pages:
20