文献类型：期刊文献

英文题名：Assessing the relative importance of sunshine, temperature, precipitation, and spring phenology in regulating leaf senescence timing of herbaceous species in China

作者：Ren, Shilong[1];Vitasse, Yann[2];Chen, Xiaoqiu[3];Peichl, Matthias[4];An, Shuai[5]

第一作者：Ren, Shilong

通讯作者：Ren, SL[1]

机构：[1]Shandong Univ, Environm Res Inst, Qingdao 266237, Peoples R China;[2]WSL Swiss Fed Inst Forest Snow & Landscape Res, Forest Dynam, Zurcherstr 111, CH-8903 Birmensdorf, Switzerland;[3]Peking Univ, Coll Urban & Environm Sci, Minist Educ, Lab Earth Surface Proc, Beijing 100871, Peoples R China;[4]Swedish Univ Agr Sci, Dept Forest Ecol & Management, S-90183 Umea, Sweden;[5]Beijing Union Univ, Coll Appl Arts & Sci, Beijing 100191, Peoples R China

第一机构：Shandong Univ, Environm Res Inst, Qingdao 266237, Peoples R China

通讯机构：[1]corresponding author), Shandong Univ, Environm Res Inst, Qingdao 266237, Peoples R China.

年份：2022

卷号：313

外文期刊名：AGRICULTURAL AND FOREST METEOROLOGY

收录：;Scopus(收录号：2-s2.0-85121144755);WOS:【SCI-EXPANDED(收录号:WOS:000820691000010)】；

基金：This work was supported by Shandong Provincial Natural Science Foundation (No. ZR2020QD001), China. We thank the Meteorological Information Center of the China Meteorological Administration for providing phenological data.

语种：英文

外文关键词：Autumn phenology; Climate change; Geographical gradients; Herbaceous plants; Plant functional type; Spring phenology

摘要：In temperate and boreal climate, the timing of plant's growth cessation in autumn highly affects plant carbohydrate reserves and ecosystem productivity. However, the abiotic and biotic factors regulating plant's autumn phenology remain poorly understood, especially on herbaceous plants inhabiting temperate grassland ecosystems. This study collected 10' 533 of ground phenological observations conducted by professionals on 41 herbaceous species (26 for forb species and 15 for graminoid species) in 201 stations spread over China. With multiple regression analysis and contribution decomposition, we assessed the total and separate effect of preseason temperature, precipitation, sunshine hours, and spring phenology on leaf senescence and explored their relationships with species, plant functional types, and geographical gradients. Results show that leaf senescence has significantly delayed for 31% of the site-species. Sunshine hours, temperature, precipitation, and the leaf-out date primarily explained the variation of leaf senescence for 36.6%, 31.7%, 22.0%, and 9.8% of the investigated site-species, respectively. Further analysis demonstrated that sunshine hours were the foremost factor in controlling leaf senescence for 60.1% of graminoid species (n = 15) and temperature for 42.3% of forb species (n = 26). This suggests that light and heat primarily determine the autumn phenology of herbaceous plants, but there are great differences among species/functional types. Spatially with increasing altitude, we observed an increasing total explanation rate of four factors and a growing individual explanation rate of precipitation to leaf senescence. Overall, we not only highlight the key effects of sunshine hours and temperature on the autumn phenology of herbaceous plants but also emphasize the dependence of phenological responses on species, functional-types, and geographical gradients, which implies the complexity of modeling future autumn phenology of herbaceous species at regional and global scale.