水和沉积物碳成分的空间模式和多驱动因素沿着明江河连续体,中国
Chaoxiang Yuan1, Changhui Peng2, Fuzhong Wu3
1Key Laboratory for Humid Subtropical Eco-Geographical Processes of the Ministry of Education, School of Geographical Sciences, Fujian Normal University, Fuzhou, 350117, China; Institute of Environment Sciences, Department of Biology Sciences, University of Quebec at Montreal, Montreal, Quebec, Canada.
Journal of environmental management
|November 22, 2025
概括
河流碳 (C) 运输在中国显示出显著的空间差异.
科学领域:
- 环境科学 环境科学
- 地质化学 地质化学
- 生态生态学 生态生态学
背景情况:
- 河流对全球碳循环至关重要,连接着陆地和海洋生态系统.
- 跨不同河流秩序和生态系统的河流碳运输数据有限,这阻碍了准确的评估.
- 了解河流碳动态对于气候调节和流域管理至关重要.
研究的目的:
- 在水和沉积物中量化碳成分 (总C,总有机C,溶解有机C,溶解无机C) 的空间分布.
- 确定影响碳度的关键驱动因素及其在明江河流域的空间模式.
- 为生态保护和碳预算估计提供有关河流碳动态的见解.
主要方法:
- 在明江河流域的八个河系和六种生态系统类型中进行了大规模现场采样.
- 在水和沉积物中分析总C,总有机C,溶解有机C和溶解无机C.
- 统计分析包括ANOVA,零碎SEM和RF模型与SHAP用于驾驶员识别.
主要成果:
- 观察到显著的空间异质性和水和沉积碳之间的脱.
- 碳度通常下游增加,最高值在更高层次的河流中.
- 水碳是由环境和水质因素驱动的,而沉积物碳是由沉积物组成控制的.
结论:
- 中国东南部的河流碳动态表现出强烈的空间异质性和下游积累.
- 降水,温度和物理化学条件是河流碳的关键驱动因素.
- 这些发现对流域管理,生态保护和碳预算有实际意义.
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