Li Ting, Luo Peng, Xiong Qinli, Yang Hao, Gu Xiaodong, Qiu Yuming, Lin Bo, Liu Yang, Lai Changhong
Key Laboratory of the Evaluation and Monitoring of Southwest Land Resources (Ministry of Education) Sichuan Normal University Chengdu China.
CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province Chengdu Institute of Biology Chinese Academy of Sciences Chengdu China.
Ecol Evol. 2020 Dec 28;11(2):931-941. doi: 10.1002/ece3.7106. eCollection 2021 Jan.
Many studies reported biotic change along a continental warming gradient. However, the temporal and spatial change of tree diversity and their sensitivity to climate warming might differ from region to region. Understanding of the variation among studies with regard to the magnitude of such biotic changes is minimal, especially in montane ecosystems. Our aim is to better understand changes in spatial heterogeneity and temporal dynamics of mountain tree communities under climate warming over the past four decades. In 2017, we resurveyed and recorded all tree species from 107 long-term monitoring plots that were first studied between 1974 and 1976. These plots were located in montane forests in the Giant Panda National Park (GPNP), China. Our results showed that spatial differences were found in tree species diversity changes response to mean annual temperature change over the past four decades. Tree species richness increased significantly under climate warming in Minshan (MS) and Xiaoxiangling (XXL) with higher warming rate than Qionglai (QLS) and Liangshan (LS). The trees species diversity in MS and XXL were more sensitive to climatic warming. MS and XXL should receive priority protection in the next conservation plan of the GPNP. The GPNP should avoid taking a "one-size-fits-all" approach for diversity conservation due to spatial heterogeneity in plant community dynamics.
许多研究报告了沿大陆变暖梯度的生物变化。然而，树木多样性的时空变化及其对气候变暖的敏感性可能因地区而异。对于此类生物变化幅度的研究间差异，尤其是在山地生态系统中的差异，了解甚少。我们的目标是更好地理解过去四十年来气候变暖下山地树木群落空间异质性和时间动态的变化。2017年，我们重新调查并记录了1974年至1976年首次研究的107个长期监测样地中的所有树种。这些样地位于中国大熊猫国家公园（GPNP）的山地森林中。我们的结果表明，在过去四十年中，树种多样性变化对年平均温度变化的响应存在空间差异。在气候变暖下，岷山（MS）和小相岭（XXL）的树种丰富度显著增加，升温速率高于邛崃山（QLS）和凉山（LS）。岷山和小相岭的树种多样性对气候变暖更为敏感。在大熊猫国家公园的下一个保护计划中，岷山和小相岭应优先得到保护。由于植物群落动态存在空间异质性，大熊猫国家公园应避免采取“一刀切”的多样性保护方法。
