文献类型：期刊文献

英文题名：Effects of land-use on soil C, N, and P stocks and stoichiometry in coastal wetlands dependent on soil depth and latitude

作者：Xiong, Jing[1,2] Shao, Xuexin[1,2,3] Li, Niu[1,2] Yuan, Haijing[1,2] Liu, Enjun[1,2] Wu, Ming[1,2,3]

第一作者：Xiong, Jing

通信作者：Shao, XX[1];Wu, M[1]

机构：[1]Chinese Acad Forestry, Res Inst Subtrop Forestry, Hangzhou 311400, Peoples R China;[2]Chinese Acad Forestry, Res Inst Subtrop Forestry, Wetland Ecosyst Res Stn Hangzhou Bay, Hangzhou 311400, Peoples R China;[3]Chinese Acad Forestry, Inst Subtrop Forestry, Hangzhou 311400, Peoples R China

年份：2024

卷号：240

外文期刊名：CATENA

收录：;Scopus(收录号：2-s2.0-85189560477);WOS:【SCI-EXPANDED(收录号:WOS:001217420400001)】；

基金：This study was financially supported by the Foundation of Research Institute of Subtropical Forestry, Chinese Academy of Forestry (RISFZ-2023-01) , the National Natural Science Foundation of China (31870597) , the Zhejiang Provincial Science and Technology Program (2023C03120) ; and the National Key R&D Program of China (2023YFE0101700-01) . The authors acknowledge the contributions of the anonymous reviewers. And we would like to thank Editage ( www.editage.cn) for English language editing.

语种：英文

外文关键词：Geographical distribution; Salt marshes; Climate zones; Soil stoichiometry; Soil fertility

摘要：Coastal land-use is increasingly affected by Spartina alterniflora invasion, coastal reclamation, and climate change, which have been suggested to exert vital controls on soil carbon (C), nitrogen (N), and phosphorus (P) cycles, however, the effects on the geographical distributions of these element stocks and stoichiometry remain unclear. We analyzed the depth (0-100 cm) and latitudinal (19-41 degrees N) patterns of soil C, N, and P contents, stocks, and ratios in 120 Chinese coastal wetlands differing in land-use (reclaimed wetlands, natural wetlands, invasive wetlands, and bare mudflats) and climate (tropics, subtropics, and temperate). We observed stable depth patterns of soil contents, stocks, and ratios, owing to the stable depth patterns of soil conditions in each land-use. Top soils (0-30 cm) generally had higher C, N, and P contents and N:P ratio but lower C:N and C:P ratios than deep soils (30-100 cm). We found that soil C content and P stock remained constant, soil C stock, N and P contents and N:P ratio increased significantly, but soil N stock and C:N and C:P ratios decreased significantly with decreasing latitude; however, such correlations tended to be weaker in reclaimed wetlands and invasive wetlands. Land-use changes also significantly altered the magnitude of soil element stoichiometry. The effects of S. alterniflora invasion on soil C, N, and P storages can be shifted from negative in tropics to positive in temperate regions, whereas the negative effects of coastal reclamation in tropics disappeared in temperate regions. Overall, compared with natural wetlands, S. alterniflora invasion slightly decreased, whereas coastal reclamation largely decreased soil C, N, and P contents and stocks. Compared with bare mudflats, S. alterniflora invasion significantly increased C and N contents and N:P ratio but decreased C:N ratio, whereas coastal reclamation significantly decreased P content and stock and C:N ratio but increased N:P ratio, especially in top soils. Our findings will be helpful for understanding and assessing soil C sequestration and nutrient cycling in globally disturbed coastal wetlands.