在暴露于聚烯微塑料后,Phaeodactylum tricornutum的生理反应和改变的环碳生产
Xiao-Ping Lang1, Zhen He2, Gui-Peng Yang3
1Frontiers Science Center for Deep Ocean Multispheres and Earth System, and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China.
Ecotoxicology and environmental safety
|November 18, 2023
概括
聚乙烯微塑料会损害海洋藻类的生长和叶绿素含量. 然而,它们也增加了挥发性碳素 (VHCs) 的产生,可能会影响臭氧层的恢复.
科学领域:
- 环境科学 环境科学
- 海洋生物学 海洋生物学
- 大气化学 大气化学
背景情况:
- 海洋排放是大气中消耗臭氧层物质的主要来源.
- 海洋微藻产生这些化物质,但排放估计不确定.
- 环境污染物对微藻的影响尚未完全理解.
研究的目的:
- 研究聚钢 (PS) 微塑料对海洋微藻生长的影响.
- 评估PS微塑料对海洋微藻产生的挥发性碳化合物 (VHC) 的影响.
- 了解微塑料在海洋排放破坏臭氧层物质中的作用.
主要方法:
- 同时测量微藻生长和VHCs的产生.
- 暴露于不同度 (25-100毫克/升) 的PS微塑料 (0.1微米和0.5微米) 的Phaeodactylum tricornutum.
- 在20天的培养期内监测细胞密度,Chl a含量和Fv/Fm.
主要成果:
- 根据剂量,PS微塑料显著抑制了微藻的生长,细胞密度,含量和Fv/Fm.
- 在对数增长阶段,抑制率最高.
- 微塑料暴露导致过多的活性氧物种,增强VHCs生物发生,特别是CHBrCl2,CHBr2Cl和CHBr3.
结论:
- 微塑料可以对海洋微藻产生负面影响,影响它们的生理参数.
- 微塑料刺激微藻中VHCs的产生,可能是通过氧化应激.
- 广泛的海洋微塑料可能会导致VHC排放增加,可能会阻碍臭氧层的恢复.
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