文献类型：期刊文献

英文题名：Multiple environmental factors regulate the large-scale patterns of plant water use efficiency and nitrogen availability across China's forests

作者：Tang, Songbo[1,2,3,4] Lai, Yuan[1,2,3,4] Tang, Xuli[1,3] Phillips, Oliver L.[5] Liu, Jianfeng[6] Chen, Dexiang[7] Wen, Dazhi[1,2,3] Wang, Silong[8] Chen, Longchi[8] Tian, Xingjun[9] Kuang, Yuanwen[1,2,3]

第一作者：Tang, Songbo

通信作者：Kuang, YW[1];Kuang, YW[2];Kuang, YW[3]

机构：[1]Chinese Acad Sci, Key Lab Vegetat Restorat & Management Degraded Ec, South China Bot Garden, Xingke Rd 723, Guangzhou 510650, Peoples R China;[2]Southern Marine Sci & Engn Guangdong Lab, Guangzhou 511458, Peoples R China;[3]South China Bot Garden, Heshan Natl Field Res Stn Forest Ecosyst, Guangzhou 510650, Peoples R China;[4]Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China;[5]Univ Leeds, Sch Geog, Leeds LS2 9JT, W Yorkshire, England;[6]Chinese Acad Forestry, Res Inst Forestry, State Forestry Adm, Key Lab Tree Breeding & Cultivat, Beijing 100091, Peoples R China;[7]Chinese Acad Forestry, Res Inst Trop Forestry, Hainan Jianfengling Forest Ecosyst Natl Field Sci, Guangzhou 510520, Peoples R China;[8]Chinese Acad Sci, Inst Appl Ecol, Key Lab Forest Ecol & Management, Huitong Expt Stn Forest Ecol, Shenyang 110016, Peoples R China;[9]Nanjing Univ, Sch Life Sci, Nanjing 210023, Peoples R China

年份：2021

卷号：16

期号：3

外文期刊名：ENVIRONMENTAL RESEARCH LETTERS

收录：;EI(收录号：20211110063106);Scopus(收录号：2-s2.0-85102402170);WOS:【SCI-EXPANDED(收录号:WOS:000621886600001)】；

基金：This study was jointly supported by the National Natural Science Foundation of China (Nos. 41771522, 41471443), the Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (No. GML2019ZD0408). We appreciate greatly 'Forest Ecosystem Carbon Project in China' for providing the leaf samples in this research.

语种：英文

外文关键词：broad-leaved forest; geographical transect; foliar carbon and nitrogen isotope ratios; nitrogen availability; precipitation seasonality; water use efficiency

摘要：Global changes, e.g. global warming, elevated nitrogen deposition, and shifts of precipitation regime, exert a major influence on forests via affecting plant water use efficiency (WUE) and plant nitrogen (N) availability. Large-scale ecological sampling can help us to better understand variation across regions and provide opportunities to investigate the potential impacts of multiple aspects of global change on forest ecosystem responses. Here, we determine the geographical patterns of key isotopic measures of ecosystem function-plant WUE (calculated from foliar delta C-13 values) and plant N availability (assessed by foliar delta N-15 values)-across China's forests covering similar to 21 latitude (similar to 22-43 degrees N) and similar to 28 longitude (similar to 93-121 degrees E) degree, and investigate how a suite of soil, plant, and atmospheric factors regulate them. We found that plant WUE increased but N availability decreased with latitude, while plant WUE and N availability did not vary with longitudinal gradient. Different factors regulate the large-scale patterns in WUE and N availability. The mean annual temperature, atmospheric N deposition, and soil water content exhibit considerable effects on plant WUE over both the north-to-south and east-to-west transects, while the mean annual precipitation, soil potassium content, foliar N, and precipitation seasonality considerably affect the latitudinal patterns of plant N availability. In addition, the east-to-west spatial pattern in plant N availability is associated with the variation in solar radiation. Our results suggest that key forest ecological functions respond to an array of environmental factors, and imply that changes in many different environmental attributes need to be considered in order to successfully assess plant WUE and N availability responses to global changes this century.