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Terrestrial ecosystem resilience to drought stress and driving mechanisms thereof in the Yellow River Basin, China
Journal of Hydrology ( IF 5.9 ) Pub Date : 2024-12-11 , DOI: 10.1016/j.jhydrol.2024.132480 Xueying Zhu, Shengzhi Huang, Vijay P. Singh, Qiang Huang, Hongbo Zhang, Guoyong Leng, Liang Gao, Pei Li, Wenwen Guo, Jian Peng
Journal of Hydrology ( IF 5.9 ) Pub Date : 2024-12-11 , DOI: 10.1016/j.jhydrol.2024.132480 Xueying Zhu, Shengzhi Huang, Vijay P. Singh, Qiang Huang, Hongbo Zhang, Guoyong Leng, Liang Gao, Pei Li, Wenwen Guo, Jian Peng
As the intensity and frequency of droughts increase, the vegetation community structure and terrestrial ecosystem are therefore threatened. However, the terrestrial ecosystem resilience under drought stress or its underlying drivers, remains poorly understood, hindering effective ecological protection and sustainable development efforts. Taking the Yellow River Basin (YRB) as an example, we constructed a resilience evaluation function by integrating the entropy weight method with the stability, resistance and recovery metrics. In general, the proposed resilience metric of terrestrial ecosystem under drought stress was proved to be reliable, highlighting a spatial pattern characterized by higher resilience in the southern regions and lower resilience in the northern areas. The forests exhibited greater resistance but slower recovery compared to grasslands, emerging as the most resilient vegetation type among the local ecosystems. The resilience pattern was largely dominated by precipitation (P), temperature (T) and plant biodiversity (PB), while P and T could have also indirect effects on resilience through PB. Moreover, we also found a significant threshold effect of PB on resilience. This study provides new insights into quantifying drought resilience and dominant drivers, which can help ecological protection and restoration of the YRB.
中文翻译:
黄河流域陆地生态系统对干旱胁迫的适应能力及其驱动机制
随着干旱强度和频率的增加,植被群落结构和陆地生态系统因此受到威胁。然而,人们对干旱胁迫下的陆地生态系统复原力或其潜在驱动因素仍然知之甚少,阻碍了有效的生态保护和可持续发展努力。以黄河流域 (YRB) 为例,我们将熵权法与稳定性、阻力和恢复指标相结合,构建了韧性评价函数。总体而言,所提出的干旱胁迫下陆地生态系统韧性指标被证明是可靠的,突出了南方地区韧性较高、北方地区韧性较低的空间格局。与草原相比,森林表现出更大的抵抗力,但恢复速度较慢,成为当地生态系统中最具弹性的植被类型。恢复力模式主要由降水 (P) 、温度 (T) 和植物生物多样性 (PB) 主导,而 P 和 T 也可能通过 PB 对恢复力产生间接影响。此外,我们还发现 PB 对弹性有显着的阈值效应。本研究为量化干旱韧性和主要驱动因素提供了新的见解,有助于 YRB 的生态保护和恢复。
更新日期:2024-12-11
中文翻译:
黄河流域陆地生态系统对干旱胁迫的适应能力及其驱动机制
随着干旱强度和频率的增加,植被群落结构和陆地生态系统因此受到威胁。然而,人们对干旱胁迫下的陆地生态系统复原力或其潜在驱动因素仍然知之甚少,阻碍了有效的生态保护和可持续发展努力。以黄河流域 (YRB) 为例,我们将熵权法与稳定性、阻力和恢复指标相结合,构建了韧性评价函数。总体而言,所提出的干旱胁迫下陆地生态系统韧性指标被证明是可靠的,突出了南方地区韧性较高、北方地区韧性较低的空间格局。与草原相比,森林表现出更大的抵抗力,但恢复速度较慢,成为当地生态系统中最具弹性的植被类型。恢复力模式主要由降水 (P) 、温度 (T) 和植物生物多样性 (PB) 主导,而 P 和 T 也可能通过 PB 对恢复力产生间接影响。此外,我们还发现 PB 对弹性有显着的阈值效应。本研究为量化干旱韧性和主要驱动因素提供了新的见解,有助于 YRB 的生态保护和恢复。