文献类型：期刊文献

英文题名：Increasing Interspecific Difference of Alpine Herb Phenology on the Eastern Qinghai-Tibet Plateau

作者：An, Shuai[1];Chen, Xiaoqiu[2];Shen, Miaogen[3];Zhang, Xiaoyang[4];Lang, Weiguang[2];Liu, Guohua[5]

第一作者：安帅

通讯作者：An, S[1]

机构：[1]Beijing Union Univ, Coll Appl Arts & Sci, Beijing, Peoples R China;[2]Peking Univ, Coll Urban Environm Sci, Lab Earth Surface Proc, Minist Educ, Beijing, Peoples R China;[3]Beijing Normal Univ, Fac Geog Sci, State Key Lab Earth Surface Processes & Resource, Beijing, Peoples R China;[4]South Dakota State Univ, Geospatial Sci Ctr Excellence, Dept Geog & Geospatial Sci, Brookings, SD USA;[5]Nanjing Univ Informat Sci & Technol, Jiangsu Key Lab Agr Meteorol, Nanjing, Peoples R China

第一机构：北京联合大学应用文理学院

通讯机构：[1]corresponding author), Beijing Union Univ, Coll Appl Arts & Sci, Beijing, Peoples R China.|[114172]北京联合大学应用文理学院;[11417]北京联合大学;

年份：2022

卷号：13

外文期刊名：FRONTIERS IN PLANT SCIENCE

收录：;Scopus(收录号：2-s2.0-85128187720);WOS:【SCI-EXPANDED(收录号:WOS:000779607500001)】；

基金：Funding This work was funded by the National Natural Science Foundation of China under Grant No. 42001101 and the R&D Program of Beijing Municipal Education Commission (KM202111417013).

语种：英文

外文关键词：alpine grassland; herbaceous plants; green-up and brown-off date; interspecific difference; climate change; sensitivities; long-term adaption

摘要：The phenology of alpine grassland on the Qinghai-Tibet Plateau (QTP) is critical to regional climate change through climate-vegetation feedback. Although many studies have examined QTP vegetation dynamics and their climate sensitivities, the interspecific difference in the phenology response to climate change between alpine species is poorly understood. Here, we used a 30-year (1989-2018) record of in situ phenological observation for five typical alpine herbs (Elymus nutans, Kobresia pygmaea, Plantago asiatica, Puccinellia tenuiflora, and Scirpus distigmaticus) and associated climatic records at Henan Station in the eastern QTP to examine the species-level difference in spring and autumn phenology and then quantify their climate sensitivities. Our results show that with significantly warming, the green-up dates of herbs were insignificantly shifted, while the brown-off dates in four out of the five herbs were significantly delayed. Meanwhile, the interspecific difference in brown-off dates significantly increased at a rate of 0.62 days/annual from 1989 to 2016, which was three times larger than that in green-up dates (0.20 days/annual). These diverse rates were attributed to the different climate controls on spring and autumn phenology. In particular, green-up dates in most herbs were sensitive to mean surface temperature, while brown-off dates were sensitive to the night surface temperature. Furthermore, brown-off dates are less sensitive to the warming in high ecological niche (with higher herb height and aboveground biomass) herbs than low niche herbs (with lower herb height and aboveground biomass). The increased phenology interspecific difference highlights the complex responses of herbs to future climate change even under the same alpine environment and indicates a potential alternation in the plants community of alpine QTP, which may further influence the regional climate-vegetation feedback.