globalchange  > 影响、适应和脆弱性
DOI: 10.1088/1748-9326/11/12/124008
论文题名:
Vegetation patches increase wind-blown litter accumulation in a semi-arid steppe of northern China
作者: Yuchun Yan; Xiaoping Xin; Xingliang Xu; Xu Wang; Ruirui Yan; Philip J Murray
刊名: Environmental Research Letters
ISSN: 1748-9326
出版年: 2016
发表日期: 2016-11-29
卷: 11, 期:12
语种: 英语
英文摘要:

Litter decomposition is an important source of soil organic matter and nutrients; however, few studies have explored how vegetation patches affect wind-driven litter mobility and accumulation. In this study, we aimed to test the following hypotheses: (1) vegetation patches can reduce litter removal and facilitate litter accumulation, (2) litter mobility results in the heterogeneous redistribution of carbon and nutrients over the land surface, and (3) litter removal rates differ among different litter types (e.g., leaf and stem). Four vegetation patch types and six litter types were used to investigate the impacts of vegetation patches on litter mobility and accumulation. The results show that compared with almost bare ground patches, patches with vegetation cover had significantly higher litter accumulation, with the shrub patch type having the highest accumulation amount. The rate of litter removal due to wind was highest for the almost bare surface type (P4) and lowest for the shrub patch (P1) and Stipa grandis community (P2) types. There were significant differences in the removal rate among the different litter types. These findings indicate that wind-based litter redistribution among bare, S. grandis-dominated, and shrub-dominated patches is at least partially responsible for increasing the spatial heterogeneity of resources on a landscape scale.

URL: http://iopscience.iop.org/article/10.1088/1748-9326/11/12/124008
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/14021
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 Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, People’s Republic of China;Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, People’s Republic of China;Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy Sciences, 11A, Datun Road, Chaoyang District, Beijing 100101, People’s Republic of China;Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, People’s Republic of China;Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, People’s Republic of China;Rothamsted Research, North Wyke, Okehampton, Devon, EX20 2SB, UK

Recommended Citation:
Yuchun Yan,Xiaoping Xin,Xingliang Xu,et al. Vegetation patches increase wind-blown litter accumulation in a semi-arid steppe of northern China[J]. Environmental Research Letters,2016-01-01,11(12)
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