Ozhan Koray, Bargu Sibel
Department of Oceanography and Coastal Sciences, School of the Coast and Environment, Louisiana State University, Baton Rouge, LA, 70803, USA,
Ecotoxicology. 2014 Oct;23(8):1387-98. doi: 10.1007/s10646-014-1281-z. Epub 2014 Jul 10.
Impacts of the Deepwater Horizon oil spill on phytoplankton, particularly, the tolerability and changes to the toxin profiles of harmful toxic algal species remain unknown. The degree to which oil-affected sympatric Karenia brevis, Prorocentrum minimum, and Heterosigma akashiwo, all of which are ecologically important species in the Gulf of Mexico, was investigated. Comparison of their tolerability to that of non-toxic species showed that the toxin-production potential of harmful species does not provide a selective advantage. Investigated toxin profiles for K. brevis and P. minimum demonstrated an increase in toxin productivity at the lowest crude oil concentration (0.66 mg L(-1)) tested in this study. Higher crude oil concentrations led to significant growth inhibition and a decrease in toxin production. Findings from this study could assist in the assessment of shellfish bed closures due to high risk of increased toxin potential of these phytoplankton species, especially during times of stressed conditions.
“深水地平线”漏油事件对浮游植物的影响，特别是对有害有毒藻类物种的耐受性和毒素谱变化仍然未知。研究了受油影响的同域短裸甲藻、微小原甲藻和赤潮异弯藻，这三种藻类在墨西哥湾都是具有重要生态意义的物种。将它们的耐受性与无毒物种的耐受性进行比较，结果表明有害物种的毒素产生潜力并未提供选择优势。对短裸甲藻和微小原甲藻的毒素谱研究表明，在本研究测试的最低原油浓度（0.66毫克/升）下，毒素生产力有所增加。更高的原油浓度导致显著的生长抑制和毒素产量下降。这项研究的结果有助于评估由于这些浮游植物物种毒素潜力增加的高风险而导致的贝类养殖场关闭情况，特别是在压力条件时期。
