Relative Phytoplankton growth responses to physically and chemically dispersed South Louisiana sweet crude oil |
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| Authors: | Koray Özhan Scott M. Miles Heng Gao Sibel Bargu |
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| Affiliation: | 1. Department of Oceanography and Coastal Sciences, School of the Coast and Environment, Louisiana State University, #1241 Energy, Coast & Environment Building, Baton Rouge, LA, 70803, USA
2. Department of Environmental Sciences, School of the Coast and Environment, Louisiana State University, Baton Rouge, LA, USA
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| Abstract: | We conducted controlled laboratory exposure experiments to assess the toxic effects of water-accommodated fractions (WAFs) of South Louisiana sweet crude oil on five phytoplankton species isolated from the Gulf of Mexico. Experiments were conducted with individual and combinations of the five phytoplankton species to determine growth inhibitions to eight total petroleum hydrocarbon (TPH) equivalent concentrations ranging from 461 to 7,205 ppb. The composition and concentration of crude oil were altered by physical and chemical processes and used to help evaluate crude oil toxicity. The impact of crude oil exposure on phytoplankton growth varied with the concentration of crude oil, species of microalgae, and their community composition. At a concentration of TPH
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