Bai Lan, Wang Zhaohua, Lu Yitong, Tian Jialing, Peng Yu
College of Life and Environmental Sciences, Minzu University of China, No. 27 Zhongguancun South Street, Haidian District, Beijing, 100081, China.
Environ Sci Pollut Res Int. 2022 Feb;29(7):10357-10365. doi: 10.1007/s11356-021-16473-y. Epub 2021 Sep 14.
Plant diversity is changing in the world; climate variation at annual scale is believed to drive these changes; however, the effects of climate variation at month scale are still unknown. Anxi, West Ordos, Xilingol, and Tumuji grassland nature reserves, located in northern China, have been well protected from human disturbance, are ideal areas to identify the drive forces for plant diversity change. Using Landsat images from 1982 to 2017, we analyzed the evolution of month- and annual-climate variables and spectral plant diversity indices, and explored the effects of the variability of temperature and precipitation on plant diversity and their relationship. The results showed that the diversity of the four grasslands was decreasing. Climate variables, in particular temperature at month scale, significantly related to grassland plant diversity. These results enlarge our understanding in how climate change driving plant diversity during a long term. Measurements coping with plant diversity decreasing may be more effective and earlier based on monthly climate variables.
全球植物多样性正在发生变化；人们认为年度尺度的气候变化是这些变化的驱动因素；然而，月度尺度的气候变化影响仍不为人知。位于中国北方的安西、西鄂尔多斯、锡林郭勒和图牧吉草原自然保护区，受到了良好的保护，免受人类干扰，是确定植物多样性变化驱动力的理想区域。利用1982年至2017年的陆地卫星图像，我们分析了月度和年度气候变量以及光谱植物多样性指数的演变，并探讨了温度和降水变率对植物多样性的影响及其关系。结果表明，这四个草原的多样性正在下降。气候变量，特别是月度尺度的温度，与草原植物多样性显著相关。这些结果拓宽了我们对长期气候变化如何驱动植物多样性的理解。基于月度气候变量采取应对植物多样性下降的措施可能更有效且更及时。
