微塑料对土生态系统中典型的宏观植物的影响
Jiong Wu1, Shiqi Jiang1, Jiaxin Zhang1
1School of Chemistry and Environment, Guangdong Provincial Observation and Research Station for Tropical Ocean Environment in Western Coastal Water, Guangdong Provincial Key Laboratory of Intelligent Equipment for South China Sea Marine Ranching, Guangdong Ocean University, Zhanjiang, 524088, China.
Environmental research
|July 1, 2024
概括
海藻床中的微塑料 (MP) 伤害海洋生物,造成氧化应激并改变肠道细菌. 即使是低度的MP,也会对盆地生物带来生态风险.
科学领域:
- 环境科学 环境科学
- 海洋生物学 海洋生物学
- 生态毒理学 生态毒理学
背景情况:
- 微塑料 (MP) 是广泛存在的环境污染物.
- 关于海藻床生态系统中MPs的研究,特别是它们对巨型植物的影响,是有限的.
- 石灰岩生态系统是重要的海洋息地,可能受到MPs的影响.
研究的目的:
- 为了调查MPs在Sargassum生态系统内的巨型植物中的分布和毒性.
- 评估环境相关的MP度对海洋盆地生物的影响.
- 阐明MP对大型谷底动物构成的生态风险.
主要方法:
- 在现场调查沉积物中的MP丰度.
- 在室内进行微观宇宙实验,将宏观植物暴露在不同的MP度 (0,2,20件/g) 中,持续30天.
- 分析了基酸丰富度在巨型菌中,生物积累,氧化应激标志物,肠道微生物群和性酸酶 (AKP) 活性.
主要成果:
- 沉积物中MP的丰度在0.9-2.3项/g之间.
- 麦克罗本托斯 (Macrobenthos) 显示了MP丰度的度依赖的增加,没有显著的热带生物积累.
- 在每日2个物品中,MPs诱导了氧化应激和改变了肠道微生物群的组成.
- 高度的MP (20项/g) 显著影响了软体动物的AKP活动,表明了潜在的适应性或有害影响.
结论:
- 国会议员对Sargassum生态系统中的宏观植物构成生态风险,即使在低环境度下.
- 暴露于MP可以通过氧化应激和肠道功能失调来破坏生物体的平衡.
- 性酸酶活性作为软体动物MP毒性的潜在生物标志物,反映了适应性或生存挑战.
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