植物寻找没有塑料污染的土壤块,但不能取利
Benedikt Speißer1, Mark van Kleunen2,3
1Ecology, Department of Biology, University of Konstanz, 78464, Constance, Germany. benedikt.speisser@uni-konstanz.de.
Scientific reports
|October 29, 2023
概括
植物通过在没有塑料的土壤中长出更长的根,积极避免不齐的微塑料污染. 然而,这种避免塑料污染的策略降低了整体工厂的性能,这表明对环境塑料污染作出回应的权衡.
科学领域:
- 环境科学 环境科学
- 植物生物学 植物生物学
- 生态毒理学 生态毒理学
背景情况:
- 微塑料 (MP) 对植物-土壤系统产生物理和化学影响.
- 微塑料的环境分布往往是异质的,发生在斑块上.
- 不同质的微塑料分布对植物反应的影响在很大程度上仍未被探索.
研究的目的:
- 调查不同微塑料分布模式 (均质与异质) 如何影响植物表现和根源食.
- 在不同的微塑料污染场景下评估植物与土壤的相互作用.
- 为了确定在无塑料的补丁中加强根部食是否有利于异质微塑料环境中的植物.
主要方法:
- 一个涉及29种草本植物的多物种实验.
- 三种微塑料处理:控制 (没有MP),均质MP分布和异质MP分布.
- 评估植物生物质,根形态和根食行为,以应对微塑料处理.
主要成果:
- 植物在异质的微塑料分布中表现出显著的根食行为,更喜欢没有塑料的补丁.
- 根生长了25%长,在异质的处理中,在没有塑料的补丁中积累了20%的生物质.
- 这种积极的根源食和避免塑料与植物整体性能降低相关,这表明投资成本.
结论:
- 植物可以通过改变根生长和食来积极应对异质微塑料污染.
- 避免微塑料污染斑块的好处可能不会超过专门根生长的能量成本.
- 这些发现突出了复杂的植物微塑料相互作用,并表明植物可能不是塑料污染的被动受害者.
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