除草剂泄漏到海水中会影响全球的初级生产力和动物浮游生物
Liqiang Yang1,2, Xiaotong He1, Shaoguo Ru3
1College of Marine Life Sciences, Ocean University of China, Qingdao, China.
Nature communications
|February 27, 2024
概括
全球沿海水域的除草剂污染严重影响了海洋初级生产力. 即使是低度也会抑制浮游植物,影响海洋食物网,并可能降低海洋生产力.
科学领域:
- 环境化学环境化学
- 海洋生态海洋生态学
- 海洋学 海洋学 海洋学
背景情况:
- 杀草剂对海洋初级生产力的影响尚不清楚.
- 全球缺乏关于沿海除草剂污染和浮游植物反应的数据.
研究的目的:
- 评估全球沿海水域的除草剂污染情况.
- 为了确定植物浮游生物群落的除草剂度-反应关系.
- 评估除草剂压力对海洋初级生产率和食物网的影响.
主要方法:
- 在661个全球站点 (1990-2022) 分析了12种三除草剂的时空分布.
- 量化除草剂度 (中位数,第三四分位数,最大值).
- 对植物浮游生物的初级生产力和微动物浮游生物群落结构的评估影响.
主要成果:
- 确定的三素除草剂度:中位数为0.18,Q3为1.27,最大为29.50nmol L-1.1.
- 植物浮游生物的初级生产率在25%的地点被抑制>5%,在10%的地点被抑制>10%.
- 由于除草剂的压力,观察到植物浮游生物群落的变化和微动物浮游生物群落的变化.
结论:
- 在全球范围内,除草剂污染严重抑制了海洋初级生产力.
- 植物浮游生物社区结构和食物网动态因除草剂压力而改变.
- 持续的除草剂投入可能会威胁到沿海水的稳定性和生产力.
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