多种全球变化驱动因素对全球陆地循环的附加效应
Bangjing Ding1,2, Di Xu2,3, Shuo Wang2,3
1Danjiangkou Wetland Ecosystem Field Scientific Observation and Research Station, Chinese Academy of Sciences & Hubei Province, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, China.
Global change biology
|April 4, 2025
概括
全球变化因素对陆地循环产生重大影响. 了解它们的综合作用对于预测未来的循环反应和改进地球系统模型至关重要.
科学领域:
- 环境科学 环境科学
- 生物地质化学生物地质化学
- 全球变化 生态学 生态学
背景情况:
- 全球变化,包括二氧化碳增加, (N) 添加,变暖和降水变化,深刻影响地球的生物地质化学循环.
- 多个全球变化因子 (GCF) 对陆地循环的相互作用影响尚不清楚,这阻碍了对未来全球N循环动态的准确预测.
研究的目的:
- 进行一项元分析,评估关键GCF对土壤池和陆地生态系统的转化速率的主要和相互作用的影响.
- 确定不同GCF及其组合如何影响土壤动态,并确定调节这些反应的因素.
主要方法:
- 综合了108项已发表的关于陆地生态系统的研究数据的元分析.
- 对土壤池 (,酸盐,有机N) 和转化速率 (N矿化,化,脱化) 的影响评估.
主要成果:
- 单个GCF表现出不同的影响;添加和降水增加分别对N池和转化率产生了最强的积极影响.
- 添加的积极效应通常在与其他GCF结合时会被放大.
- 虽然添加性相互作用是最常见的 (66.2%-83.3%),但也观察到协同作用 (10.5%-15.1%) 和对抗作用 (2.8%-18.9%).
- 生态系统类型,处理类型,地理位置和气候影响了土壤N池的反应,而只有处理和生态系统类型显著影响了转化速率的反应.
结论:
- GCF之间的互动效应显著影响陆地循环.
- 将这些复杂的相互作用纳入地球系统模型对于在未来全球变化场景下准确预测循环至关重要.
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