文献类型：期刊文献

英文题名：Global patterns in leaf stoichiometry across coastal wetlands

作者：Hu, Yu-Kun[1] Liu, Xu-Yan[2] He, Nian-Peng[2] Pan, Xu[1] Long, Song-Yuan[1] Li, Wei[1] Zhang, Man-Yin[1] Cui, Li-Juan[1]

第一作者：胡宇坤

通信作者：Zhang, MY[1];Cui, LJ[1]|[a00051fe3588fbc8d8c88]张曼胤;

机构：[1]Chinese Acad Forestry, Inst Wetland Res, Beijing Key Lab Wetland Serv & Restorat, Beijing 100091, Peoples R China;[2]Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China

年份：2021

卷号：30

期号：4

起止页码：852-869

外文期刊名：GLOBAL ECOLOGY AND BIOGEOGRAPHY

收录：;Scopus(收录号：2-s2.0-85099977134);WOS:【SCI-EXPANDED(收录号:WOS:000611078700001)】；

基金：National Key R&D Program of China : 2017YFC0506205; National Natural Science Foundation of China, Grant/Award Number: 31901149

语种：英文

外文关键词：biogeography; growth form; latitude; mangroves; nitrogen; nutrient cycling; phosphorus; salt marshes; stoichiometry

摘要：Aim Coastal wetlands provide crucial ecosystem functions and services, such as coastal protection, nutrient retention and C sequestration. Despite the important roles in global C, N and P cycling, the global variation in leaf stoichiometry across coastal wetlands remains unclear. Location Global. Time period 1980-2018. Major taxa studied Vascular plants. Methods By compiling a global dataset of 698 data records in 205 sites, we carried out systematic analyses of the world-wide trends and their determinants of leaf element contents and ratios of plants across coastal wetlands. Results Leaf N and P contents increased significantly, but C:N, C:P and N:P ratios decreased with increasing latitude in coastal wetlands. The mean annual temperature was the predominant driver of leaf N, P and C:N, whereas soil N:P was a good predictor of leaf C:P and N:P ratios. Furthermore, N increased faster with P in plant leaves of coastal wetlands compared with terrestrial ecosystems. Within coastal wetlands, herb-dominated salt marshes had a significantly higher leaf P content, lower leaf N:P ratio and lower scaling exponent of leaf N to P than tree-dominated mangroves. Main conclusions The similar latitudinal patterns of leaf stoichiometry in coastal wetlands compared with terrestrial ecosystems reflected the similar influences of temperature. However, different slopes of leaf P and N:P ratios and N and P scaling relationships between these two ecosystems suggested that different salinity and tidal inundation levels result in different strategies of N and P use in coastal wetland plants. These differences in leaf stoichiometry between ecosystems and between different types of coastal wetlands might need to be emphasized in future biogeochemical modelling owing to their different roles in global nutrient and carbon cycling.