globalchange  > 影响、适应和脆弱性
DOI: 10.1088/1748-9326/11/1/014003
论文题名:
Typhoon enhancement of N and P release from litter and changes in the litter N:P ratio in a subtropical tidal wetland
作者: Weiqi Wang; Jordi Sardans; Chuan Tong; Chun Wang; Linmei Ouyang; Mireia Bartrons; Josep Peñuelas
刊名: Environmental Research Letters
ISSN: 1748-9326
出版年: 2016
发表日期: 2016-01-08
卷: 11, 期:1
语种: 英语
英文摘要:

Litter production and decomposition are key processes controlling the capacity of wetland to store and cycle carbon (C) and nutrients. Typhoons deposit large amounts of green and semi-green (between green and withered) plant tissues and withered litter (normal litter) on wetland soils, generating a pulse of litter production. Climatic models project an increase in typhoon intensity and frequency. Elucidating the impacts of typhoons on C, N and P cycles and storage capacities in subtropical and tropical wetland areas is thus important. We analyzed the patterns and changes of litter decomposition after a typhoon in the Minjiang River estuary in southeastern China. Green litter decomposed the fastest, and the loss of mass did not differ significantly between semi-green litter, withered litter and mixed litter (all soil litter after a typhoon). During the decomposition process the remaining green litter had the highest, and withered litter the lowest N and P concentrations. The biomass loss rate of litter during the studied period was related to the initial litter N and P concentrations. Remaining litter generally increased its N:P ratio during decomposition. The ratio of the released N and P was consequently lower than the initial N:P ratio in all litter types. The typhoon enhanced the release of C, N and P from the litter (884, 12.3 and 6 kg ha−1, respectively) by 264 days after the typhoon. The soil was accordingly enriched with organic matter and nutrients for several months, which should favor microbial growth rates (higher C, N and P availability and lower C:nutrient and N:P ratios) and increase the rates of C and nutrient cycling. If the frequency and/or intensity of typhoons increase, a constant increase in the release of N and P to the soil with lower N:P ratios could change the N and P cycles in wetlands and provide better conditions for the spread of fast-growing species.

URL: http://iopscience.iop.org/article/10.1088/1748-9326/11/1/014003
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/13649
Appears in Collections:影响、适应和脆弱性
气候减缓与适应

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作者单位: Institute of Geography, Fujian Normal University, Fuzhou 350007, People’s Republic of China;Key Laboratory of Humid Subtropical Eco-geographical Process, Ministry of Education, Fujian Normal University, Fuzhou 350007, People’s Republic of China;CSIC, Global Ecology CREAF—CSIC-UAB, Cerdanyola del Vallès, E-08193 Barcelona, Catalonia, Spain;CREAF, Cerdanyola del Vallès, E-08193 Barcelona, Catalonia, Spain;Institute of Geography, Fujian Normal University, Fuzhou 350007, People’s Republic of China;Key Laboratory of Humid Subtropical Eco-geographical Process, Ministry of Education, Fujian Normal University, Fuzhou 350007, People’s Republic of China;Institute of Geography, Fujian Normal University, Fuzhou 350007, People’s Republic of China;Key Laboratory of Humid Subtropical Eco-geographical Process, Ministry of Education, Fujian Normal University, Fuzhou 350007, People’s Republic of China;Institute of Geography, Fujian Normal University, Fuzhou 350007, People’s Republic of China;CSIC, Global Ecology CREAF—CSIC-UAB, Cerdanyola del Vallès, E-08193 Barcelona, Catalonia, Spain;CREAF, Cerdanyola del Vallès, E-08193 Barcelona, Catalonia, Spain;CSIC, Global Ecology CREAF—CSIC-UAB, Cerdanyola del Vallès, E-08193 Barcelona, Catalonia, Spain;CREAF, Cerdanyola del Vallès, E-08193 Barcelona, Catalonia, Spain

Recommended Citation:
Weiqi Wang,Jordi Sardans,Chuan Tong,et al. Typhoon enhancement of N and P release from litter and changes in the litter N:P ratio in a subtropical tidal wetland[J]. Environmental Research Letters,2016-01-01,11(1)
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