微塑料颗粒对珊瑚礁的作用 珊瑚礁上的微塑料颗粒对珊瑚礁的作用
Alexander Zientek1, Michael Schagerl2, Matthias Nagy1
1Department of Palaeontology, University of Vienna, Vienna, Austria.
Scientific reports
|May 30, 2024
概括
聚乙烯微塑料通过降低其代谢活性和共生生物光合作用来损害海洋虫. 没有养的Heterostegina depressa比养的Amphistegina lobifera更受影响.
科学领域:
- 海洋生物学 海洋生物学
- 生态毒理学 生态毒理学
- 亲生组织学 亲生组织学 Protistology
背景情况:
- 类植物是海洋碳循环中的关键参与者.
- 微塑料污染是海洋生态系统日益关注的问题.
- 携带共生体的类藻类是光合作用藻类的宿主.
研究的目的:
- 为了研究聚钢 (PS) 微塑料对两种大型岩型藻物种的影响.
- 评估微塑料对菌代谢,共生体健康和颗粒吸收的影响.
- 为了比较养和不养虫对微塑料的敏感性.
主要方法:
- 稳定同位素的结合 (C,N) 来测量代谢活动.
- 影像脉冲振幅调制 (PAM) 度测量以评估共生生物的光合作用效率.
- 微观分析以量化菌中微塑料积累的数量.
主要成果:
- Amphistegina lobifera在细胞质上结合了更多的PS颗粒,而不是Heterostegina depressa,它在外部积累了它们.
- 在两种物种中,微塑料减少了共生生物的光合作用区域,这表明宿主消化.
- 在A. lobifera中减少稳定同位素的吸收表明抑制了碳和的同化.
- 微塑料和藻类之间发生了对食物吸收的竞争.
- 没有食的H. depressa对微塑料污染的敏感性更大.
结论:
- 两种研究的虫物种都对聚烯微塑料污染敏感.
- 微塑料干扰着类动物的基本生理过程,包括新陈代谢和共生.
- 在养和不养物种之间观察到的不同积累和影响突出了各种生态风险.
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