平原湖生态系统中的碳气合:气候变暖和人为加剧的双同位素指纹
Chunting Li1, Zidong Chen1, Linpei Huang1
1Yunnan Key Laboratory of Plateau Geographical Processes and Environmental Changes, Faculty of Geography, Yunnan Normal University, Kunming, Yunnan, China.
Water research
|October 18, 2025
概括
植物浮游生物同位素揭示了气候变化和城市化如何影响湖泊碳和循环. 变暖丰富了碳同位素,而城市化改变了同位素,影响了生态系统的能量流.
科学领域:
- 水生生态学 水生生态学
- 生物地质化学生物地质化学
- 稳定的同位素生态学
背景情况:
- 植物浮游生物是关键的初级生产者,调节水生碳和循环.
- 植物浮游生物质中的稳定同位素特征作为环境变化的敏感标记物.
- 了解这些标志对于评估气候波动和人类对湖泊生态系统的影响至关重要.
研究的目的:
- 为了分析云南高原湖泊中植物性浮游生物的碳和同位素特征.
- 在这些同位素上研究结合的环境压力因素 (气候和城市化) 的调节机制.
- 建立一个同位素工具包,用于诊断碳-的合和指导流域治理.
主要方法:
- 植物浮游生物碳 (δ13C) 和 (δ15N) 同位素特征的全面分析.
- 从2017年到2022年,在云南高原的9个湖泊收集数据.
- 统计分析以将同位素特征与温度,生长率,无机碳和城市化指标等环境变量相关联.
主要成果:
- 植物浮游生物的碳同位素区分显示温度灵敏度 (+0.43 ‰/°C) 和季风调节的季节性模式,变暖增强了13C的丰富度.
- 同位素签名对流域城市化表现出非线性反应,反映了人为源 (肥料与污水).
- 观察到13C和15N同位素的双重丰富,可能会改变热带能量转移效率.
结论:
- 植物浮游生物同位素有效地解码了气候变化和湖泊生态系统中人类干扰之间的协同相互作用.
- 气候变暖和城市化对湖泊碳和循环产生了明显的,增强的印记.
- 一个同位素工具包可以诊断碳-的合,并告知脆弱的高原环境中的适应性流域管理.
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