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微塑料削弱了蓝菌的适应能力

Hui Zeng¹, Xiangang Hu¹, Shaohu Ouyang¹

¹Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education)/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Carbon Neutrality Interdisciplinary Science Center/College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.

Environmental science & technology

|June 8, 2023

概括

海洋变暖和微塑料污染对海洋浮游生物造成伤害. 微塑料减少了变暖对Synechococcus蓝球菌碳固定的积极影响,影响了海洋碳循环.

科学领域:

海洋生物学海洋生物学
海洋学海洋学海洋学
环境科学环境科学

背景情况:

人类活动正在导致海洋变暖,威胁到海洋生态系统.
微塑料 (MP) 污染是一个日益严重的全球性问题.
对海洋浮游生物的OW和MPs的综合影响在很大程度上是未知的.

研究的目的:

研究海洋变暖和微塑料暴露对全球丰富的蓝藻细菌Synechococcus sp.产生的协同效应.
评估对细胞生长,碳固定和光合作用颜料的影响.
通过转录组可塑性来理解潜在的分子反应.

主要方法:

在培养Synechococcus sp. 在受控条件下模拟未来的海洋变暖场景 (28°C和32°C),有或没有微塑料暴露.
测量细胞生长率和碳固定率.
分析光合作用色素含量和基因表达特征 (转录组).

主要成果:

仅仅海洋变暖增加了Synechococcus sp.的细胞生长和碳固定.
微塑料暴露显著削弱了海洋变暖对生长和碳固定的积极影响.
OW + MPs使碳固定减少了10.9% (28°C) 和15.4% (32°C),并加强了光合作用色素的减少.
转录组分析显示了对变暖的适应性反应,但微塑料改变了这些反应,可能增加了脆弱性.

结论:

微塑料干扰了Synechococcus sp.的适应能力. 海洋变暖的原因.
OW和MPs的综合影响对植物浮游生物的碳固定产生负面影响,对海洋碳流产生重大影响.
这些发现强调了在气候变化背景下解决微塑料污染的关键需要,以保护海洋初级生产.

关键词:

碳固化的碳固化.微塑料微塑料的使用海洋变暖海洋变暖光合作用光合作用.转录基因适应转录基因适应

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