Seasonal Hypoxia Regulates Macrobenthic Function and Structure in the Mississippi Bight

Document Type

Article

Publication Date

4-15-2016

Department

Ocean Science and Technology

Abstract

Hypoxic conditions are escalating to the east of the Mississippi River within the Mississippi Bight. The objective of this study was to examine changes in macrobenthic function and structure relative to seasonal hypoxia over a 3.5 year period at the 10 m (Site 6) and 20 m (Site 8) isobaths within the Mississippi Bight. Seasonal hypoxia acted as a regular periodic disturbance during the study period, although the magnitude and duration of hypoxia varied inter-annually. Macrobenthic metrics revealed seasonal hypoxia effects on secondary production potential and community maturity, which agrees with previous studies. In addition, metrics were notably higher at the 20 m isobath during the latter half of the study period, following the Deepwater Horizon (DwH) oil spill. This study confirms hypoxia as a major driver affecting the function and structure of soft-bottom macrobenthos in the Mississippi Bight.

Publication Title

Marine Pollution Bulletin

Volume

105

Issue

1

First Page

299

Last Page

309

Link to Full Text

Find in your library

Share

COinS