Marine Science Institute, University of Texas at Austin, Port Aransas, TX 78373, USA; Marine Ecosystem Research Center, Korea Institute of Ocean Science and Technology, Busan 49111, South Korea.
Marine Science Institute, University of Texas at Austin, Port Aransas, TX 78373, USA.
Harmful Algae. 2020 May;95:101802. doi: 10.1016/j.hal.2020.101802. Epub 2020 May 13.
The association between phytoplankton blooms and oil spills is still controversial despite numerous studies. Surprisingly, to date, there have been no studies on the effect of bacterial communities (BCs) exposed to crude oil on phytoplankton growth, even though crude oil changes BCs, which can then affect phytoplankton growth and species composition. Co-culture with crude oil-exposed BCs significantly stimulated the growth of Prorocentrum texanum in the laboratory. To gain more direct evidence, oil-degrading bacteria from oil-contaminated sediment collected after the Texas City "Y" oil spill were isolated, and changes in dinoflagellate growth when co-cultured with single bacterial isolates was investigated. The oil-degrading bacterial isolates significantly stimulated the growth of dinoflagellates (axenic and xenic cultures) through releasing growth-promoting substances. This study provides new evidence for the potential role of oil-degrading bacteria in the formation of phytoplankton blooms after an oil spill.
尽管已有大量研究，但浮游植物水华与溢油之间的关联仍存在争议。令人惊讶的是，迄今为止，尚未有研究关注暴露于原油中的细菌群落（BC）对浮游植物生长的影响，尽管原油会改变 BC，进而影响浮游植物的生长和物种组成。实验室共培养实验表明，与暴露于原油的 BC 共培养可显著促进塔玛亚历山大藻的生长。为了获得更直接的证据，从德克萨斯城“Y”溢油事件后采集的受污染沉积物中分离出了降解石油的细菌，并研究了与单一细菌分离株共培养时甲藻生长的变化。通过释放促进生长的物质，这些石油降解细菌分离株显著刺激了甲藻（无菌和混菌培养）的生长。这项研究为石油降解细菌在溢油事件后形成浮游植物水华的潜在作用提供了新的证据。
