Program and Agenda

Abstract

IMPACT OF CRUDE OIL AND DISPERSANT ON MICROZOOPLANKTON AND ITS EFFECTS ON THE STRUCTURE OF MICROBIAL PLANKTON COMMUNITIES IN THE GULF OF MEXICO

Microzooplankton (20-200 ┬Ám) play a key role in marine food webs as major consumers of primary production and as an important link between low and high trophic levels. However, despite its importance in marine ecosystems, little is known about the effects of crude oil and chemical dispersant on microzooplankton. We conducted laboratory and ship-based exposure experiments to determine the effects of crude oil, chemical dispersant (Corexit 9500A) and dispersant treated-oil on the main groups of microzooplankton (ciliates, heterotrophic dinoflagellates and copepod nauplii) and on the structure of the microbial plankton community. Species and community-level experiments showed that dispersant increases the toxicity of crude oil to microzooplankton. Tintinnids, aloricate ciliates and copepod nauplii were extremely sensitive to crude oil and dispersant, whereas heterotrophic dinoflagellates and other microbial components showed a relatively high tolerance to these pollutants. Our results indicate that crude oil and dispersant pollution may produce a disruption in the transfer of energy from low to high trophic levels and cause important changes in the structure of planktonic marine microbial communities.

ePoster:

Authors

ALMEDA, R., University of Texas at Austin Marine Science Institute, USA, ralmeda2010@live.com

Brown, C. B., University of Texas at Austin Marine Science Institute, USA

Jiqing , L., University of Texas at Austin Marine Science Institute, USA

Hyatt , C., University of Texas at Austin Marine Science Institute

Buskey, E. J., University of Texas at Austin Marine Science Institute, USA

Details

Poster presentation

Session #:160
Date: 2/25/2014
Time: 16:00 - 18:00
Location: Poster/Exhibit Hall

Presentation is given by student: No

PosterID: 1747