Key Laboratory of Marine Ecosystem and Biogeochemistry, Second Institute of Oceanography, State Oceanic Administration, Hangzhou, China.
Mar Environ Res. 2012 Oct;81:12-7. doi: 10.1016/j.marenvres.2012.08.003. Epub 2012 Aug 11.
Recent oil spillage accidents around the world greatly increase harmful risks to marine ecology. This study evaluated the influences of petroleum water accommodated fraction (WAF) on 15 typical species of marine copepods collected from a subtropical bay in East China Sea at different seasons. Copepods showed impaired swimming ability, restlessness, loss of balance, anoxic coma, and even death when they were acutely exposed to the crude oil WAF under laboratory conditions. The LC(50) values (expressed in total petroleum hydrocarbon concentration) indicated that the tolerances of copepods to WAF decreased significantly (P < 0.05) with increased exposure duration and natural water temperatures (acclimatization temperature). The sensitivity of the copepods was species-specific (P < 0.01), and there was a significant (P < 0.05) positive correlation between the 48-h LC(50) and body size. Therefore, the small copepod species confront more survival challenges under oil contamination stress, especially in the warm months or regions.
近年来，世界各地发生的石油泄漏事故极大地增加了海洋生态系统的有害风险。本研究评估了石油水可溶部分（WAF）对东海亚热带海湾采集的 15 种典型海洋桡足类动物在不同季节的影响。在实验室条件下，桡足类动物在急性暴露于原油 WAF 时，表现出游泳能力受损、不安、失去平衡、缺氧昏迷，甚至死亡。LC（50）值（以总石油烃浓度表示）表明，桡足类动物对 WAF 的耐受性随着暴露时间和自然水温（驯化温度）的增加而显著降低（P < 0.05）。桡足类动物的敏感性具有种特异性（P < 0.01），48 小时 LC（50）与体型之间存在显著的正相关关系（P < 0.05）。因此，在油污胁迫下，小型桡足类动物面临更大的生存挑战，特别是在温暖的月份或地区。
