人类干扰对流代谢的影响:全球元分析
Peng Miao1, Ruiqi Pu2, Yunkai Lou1
1Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
Journal of environmental management
|January 18, 2026
概括
人类产生的压力显著改变了河流的新陈代谢,在全球范围内增加了总初级产量 (GPP) 和变化. 土地利用的影响,特别是农业和城市发展的营养丰富,推动了这些变化,需要有针对性的流域管理.
科学领域:
- 生态生态学 生态生态学
- 环境科学 环境科学
- 水文学的水文学
背景情况:
- 河流生态系统由于人类活动而面临重大结构和功能变化.
- 河流代谢对于有机碳循环和流域管理至关重要.
- 在人为压力下流体代谢的全球数据有限.
研究的目的:
- 评估流体新陈代谢如何应对全球人类引起的干扰.
- 为了比较自然与受干扰的流体中的新陈代谢.
- 用贝叶斯网络确定农业和城市土地利用对河流代谢的明显影响.
主要方法:
- 从91个自然和167个受干扰的河流中收集了关于河流代谢,环境变量和土地利用的全球数据.
- 自然和受干扰的河流之间的代谢率和环境条件的比较.
- 利用贝叶斯网络进行场景分析,以建模土地使用影响.
主要成果:
- 干扰的河流显示营养丰富,水文变化和河岸条件,中位数初级生产总值 (GPP) 增加了2.3倍,变化更高.
- 在自然溪流中影响GPP的度和流域梯度在受干扰的溪流中减少或消失.
- GPP比生态系统呼吸 (ER) 更容易受到干扰;农业和城市土地利用的营养丰富增加了GPP,而农业也通过排放和温度变化影响了GPP.
结论:
- 人类造成的压力显著改变了流体代谢,特别是增加了全球GPP及其变异性.
- 农业和城市土地利用是这些代谢变化的关键驱动因素,主要是通过营养丰富.
- 调查结果强调需要有针对性的流域管理战略,以保持溪流生态系统的运行.
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