微塑料通过减少动物浮游生物的养和可能从消费者控制中释放藻类来影响简单的水生食物网动态
Christopher R Malinowski1, Catherine L Searle2, James Schaber3
1Purdue University, Department of Forestry and Natural Resources, 195 Marsteller St., West Lafayette, IN 47907, USA; Ocean First Institute, 51 Shoreland Drive, Key Largo, FL 33037, USA.
The Science of the total environment
|September 2, 2023
概括
水生生态系统中的微塑料会损害动物浮游生物的养,可能导致藻类繁殖. 这项研究表明,微塑料如何通过影响食草动物消费来破坏淡水食物网.
科学领域:
- 环境科学 环境科学
- 生态毒理学 生态毒理学
- 水生生态学 水生生态学
背景情况:
- 微塑料污染在全球范围内日益增加,引发了对生态系统健康的担忧.
- 关于微塑料对生物相互作用和食物网动态的影响存在知识差距.
研究的目的:
- 调查环境相关的微塑料度对淡水动物浮游生物物种的影响.
- 评估微塑料如何影响养行为,藻类消费和捕食者-猎物相互作用在简化的水生食物网.
主要方法:
- 达芬尼亚牙和Arctodiaptomus dorsalis同时暴露在不同度的微塑料中 (聚乙烯微球).
- 模拟的淡水食物网,包括植物浮游生物猎物和捕食者线索.
- 测量了微塑料的吸收量,藻类的消耗率,以及水中的甲基度.
主要成果:
- 达芬尼亚牙 (Daphnia dentifera) 的微塑料吸收率更高,尤其是在捕食者存在时.
- 这两种动物浮游生物物种在最高微塑料度下表现出减少藻类消耗.
- 在高微塑性处理中观察到较高的叶绿素-a水平,这表明放牧压力降低.
结论:
- 微塑料可以损害动物浮游生物消费藻类的能力.
- 微塑料可能通过减少动物浮游生物对藻类的消费控制来破坏生态平衡.
- 需要进一步的研究来了解微塑料污染对食物网的全部影响.
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