Natural forest growth and human induced ecosystem disturbance influence water yield in forests
Natural forest growth and human induced ecosystem disturbance influence water yield in forests
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DOI：
10.1038/s43247-022-00483-w
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发表时间：
2022-06
影响因子：
7.9
通讯作者：
Zhen Yu;Xiuzhi Chen;Guoyi Zhou;Evgenios Agathokleous;Lin Li;Zhiyong Liu;Jianping Wu;Ping Zhou;Meimei Xue;Yuchan Chen;Wenting Yan;Lei Liu;T. Shi;Xiang Zhao
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作者：
Zhen Yu;Xiuzhi Chen;Guoyi Zhou;Evgenios Agathokleous;Lin Li;Zhiyong Liu;Jianping Wu;Ping Zhou;Meimei Xue;Yuchan Chen;Wenting Yan;Lei Liu;T. Shi;Xiang Zhao
自然增长、植树造林和砍伐等森林干扰共同促成了森林的动态性质。因此，为了加强森林管理、水资源管理和碳固存，必须更好地了解森林变化对水量的净影响。在这里，我们对496个流域进行了25年的全球荟萃分析，以调查森林复杂性和总体变化对水产量的影响。我们根据人为干扰的类型对流域进行分类，包括砍伐和间伐、植树造林以及没有外部干扰。我们发现，径流系数（流域出口的年产水量与降水量的比值）是更敏感的外部干扰，在森林生态系统复杂性较低的森林相比，具有较高的复杂性。此外，我们发现森林的自然生长可能会增加径流，并导致径流系数增加几十年后。我们的研究结果强调了以自然为基础的森林恢复的重要性，特别是在易受缺水影响的地区。
Together natural growth, afforestation and forest disturbance, such as felling, contribute to the dynamic nature of forests. Thus to enhance forest management, water resource management and carbon sequestration, the net effect of forest changes on water yield must be better understood. Here, we conduct a global meta-analysis of 496 watersheds over 25 years to investigate the impact of forest complexity and overall changes on water yields. We classify watersheds based on the type of human disturbance, including felling and thinning, afforestation, and absence of external disturbances. We find that the runoff coefficient (ratio of annual water yield in watershed outlet to precipitation) is more sensitive to external disturbances in forests with lower ecosystem complexity compared to forests with higher complexity. In addition, we found forest natural growth may increase runoff and lead to an increased runoff coefficient decades later. Our findings highlight the importance of nature-based forest restoration, especially in regions vulnerable to water shortage.