文献类型：期刊文献

英文题名：Interactive Effects of Temperature and Precipitation on Vegetation Activity Along Elevation Gradients in Alpine and Sub-Alpine Woodland of Southwest China

作者：Sun, Meirong[1] Sun, Pengsen[1] Liu, Ning[2] Zhang, Lei[3] Yu, Zhen[4] Feng, Qiuhong[5] Smettem, Keith[6] Liu, Shirong[1]

第一作者：Sun, Meirong

机构：[1] Ecology and Nature Conservation Institute, Chinese Academy of Forestry, Beijing, China; [2] Environment, CSIRO, Canberra, ACT, 2601, Australia; [3] Research Institute of Forestry, Chinese Academy of Forestry, Beijing, China; [4] Institute of Ecology and School of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing, China; [5] Ecological Restoration and Conservation on Forest and Wetland Key Laboratory of Sichuan Province, Sichuan Academy of Forestry, Sichuan, Chengdu, 610081, China; [6] The UWA Institute of Agriculture, The University of Western Australia, Perth, WA, 6001, Australia

年份：2023

外文期刊名：SSRN

收录：EI(收录号：20230204771)

语种：英文

外文关键词：Additives - Climate change - Forestry - Vegetation

摘要：Elevation plays a pivotal role in changing hydroclimates, dominating vegetation activity and shaping vegetation distribution pattern in alpine areas. However, little is known about the interactive effect of dominant drivers on vegetation activity along the elevation gradients (EG). In this study, we explored the spatio-temporal pattern of normalized difference vegetation index (NDVI) as a proxy of vegetation activity and examined its interactions with temperature (T) and precipitation (P) along EG in alpine and sub-alpine woodland of Southwest China (ASWSC) during 2001-2018. We found that 24% vegetation in ASWSC exhibit significant greening trend, in responses to the significant regional warming and slightly wetting during the study period. The ratios of significant greening and browning areas to total land areas increase with EG in below 4200 m and decrease with EG in above 4200 m, while both change rates decrease with full EG. The dominant T-P interactive effect along with EG is antagonistic, except for an additive effect at elevations 2300-4200 m. The antagonistic effect can be enhanced in warm and dry years, while the additive effect can be enhanced in cold and wet years. The positive effect of P increased in warm and dry conditions at elevations below 4200 m and the positive effect of T increased in cold and wet conditions at elevations above 4200 m. Unlike the deciduous broadleaved forest (DBF) and mixed forest (MF) which showed significant additive T-P effect along EG, the evergreen needleleaf forest (ENF) and evergreen broadleaf forest (EBF) were insignificant in the P-T interactive effect. Shrubland and grassland types showed strong antagonistic effect of T-P along with EG. In general, our results revealed the varied interactive effects of temperature and precipitation on vegetation activity along EG for different vegetation types, which is key to ascertain how the subalpine vegetation sustain the future climate change. ? 2023, The Authors. All rights reserved.