Heatwaves have increased significantly in recent decades, seriously affecting the biosphere. The vegetation canopy is altered by heatwaves through high temperatures and water deficit, adversely affecting the ecosystem's health. However, how the canopy resilience of different ecosystems responding to heatwaves behaves remains less understood. Canopy conductance (G_c) couples the carbon and water cycles and is often used as a proxy for vegetation activity. Here we used eddy-covariance (EC) flux observations and a diagnostic evapotranspiration model to deduce daily canopy conductance inversely. Total 16 flux sites from 2003 to 2014 were used to explore the changes in canopy conductance during heatwaves across multiple ecosystems. Our results showed that the frequency of heatwaves increased significantly in almost all EC sites, and the average heatwave trend was 0.4 d yr⁻¹ (p < 0.05). Wetlands had the best resilience to heatwaves, as indicated by the G_c decreasing by 4.6% during heatwaves. For forest ecosystems, the G_c of evergreen broadleaf forests decreased by 29.3% during heatwaves, meaning they showed the best resilience to drought. This is followed by the deciduous broadleaf forests and evergreen needleleaf forests, whose G_c decreased by 50.7% and 46.3%, respectively. The above results suggest that the resilience of different ecosystems appears diverse during heatwaves. The wetter the ecosystem, the more resistant it is to heatwaves. This study highlights the distinct responses of ecosystems to heatwaves, facilitating our understanding of the influences heatwaves have on terrestrial ecosystems.

近几十年来，热浪显着增加，严重影响了生物圈。植被冠层因高温和缺水而被热浪改变，对生态系统的健康产生不利影响。然而，人们对不同生态系统的冠层恢复力如何响应热浪的行为仍知之甚少。冠层电导 (G _c) 耦合碳循环和水循环，通常用作植被活动的代表。在这里，我们使用涡度协方差 (EC) 通量观测和诊断蒸散模型来反推每日冠层电导。从 2003 年到 2014 年，共有 16 个通量站点被用于探索跨多个生态系统的热浪期间冠层电导率的变化。我们的结果表明，几乎所有 EC 站点的热浪频率都显着增加，平均热浪趋势为 0.4 d yr ^-1 ( p  < 0.05)。湿地对热浪的恢复能力最好，正如 G _c在热浪期间下降 4.6% 所表明的那样。对于森林生态系统，G _c常绿阔叶林的面积在热浪期间减少了 29.3%，这意味着它们表现出最佳的抗旱能力。其次是落叶阔叶林和常绿针叶林，其G _c分别下降了50.7%和46.3%。上述结果表明，不同生态系统的恢复力在热浪期间显得不同。生态系统越湿润，对热浪的抵抗力就越强。这项研究强调了生态系统对热浪的不同反应，有助于我们了解热浪对陆地生态系统的影响。