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Vegetation resistance and resilience to a decade‐long dry period in the temperate grasslands in China

机译:中国温带草原十年干旱时期的植被抗性和韧性

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摘要

The duration of climate anomalies has been increasing across the globe, leading to ecosystem function loss. Thus, we need to understand the responses of the ecosystem to long‐term climate anomalies. It remains unclear how ecosystem resistance and resilience respond to long‐term climate anomalies, for example, continuous dry years at a regional scale. Taking the opportunity of a 13‐year dry period in the temperate grasslands in northern China, we quantified the resistance and resilience of the grassland in response to this periodic dry period. We found vegetation resistance to the dry period increased with mean annual precipitation (MAP), while resilience increased at first until at MAP of 250 mm and then decreased slightly. No trade‐off between resistance and resilience was detected when MAP < 250 mm. Our results highlight that xeric ecosystems are most vulnerable to the long‐term dry period. Given expected increases in drought severity and duration in the coming decades, our findings may be helpful to identify vulnerable ecosystems in the world for the purpose of adaptation.
机译:气候异常的持续时间在全球范围内越来越大,导致生态系统功能损失。因此,我们需要了解生态系统对长期气候异常的反应。仍然尚不清楚生态系统抵抗和恢复性如何应对长期气候异常,例如,以区域规模连续干燥年份。在中国北方的温带草原上借机13年的干燥时期,我们响应了这种定期干燥期,量化了草原的抵抗力和韧性。我们发现植被抗干期随着平均年降水量(地图)而增加,而弹性起初在250毫米的地图上最初增加,然后略微下降。在Map <250 mm时,检测到阻力和弹性之间没有权衡。我们的结果强调,Xeric Ecosystems最容易受到长期干期的影响。在未来几十年中预期的干旱严重程度和持续时间的预期增加,我们的研究结果可能有助于识别世界上脆弱的生态系统,以适应适应。

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