气候变化领域集成服务门户(CCPortal): Grasslandification has significant impacts on soil carbon, nitrogen and phosphorus of alpine wetlands on the Tibetan Plateau

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DOI	10.1016/j.ecoleng.2013.06.035
	Grasslandification has significant impacts on soil carbon, nitrogen and phosphorus of alpine wetlands on the Tibetan Plateau
	Shang, Z. H.; Feng, Q. S.; Wu, G. L.; Ren, G. H.; Long, R. J.
发表日期	2013
ISSN	0925-8574
EISSN	1872-6992
起始页码	170
结束页码	179
卷号	58
英文摘要	Changes in land use will alter soil profiles of wetlands under climatic change and human disturbance, especially through grasslandification. Grasslandification is the process where a wetland is drained and converted to pasture. Grasslandificationon on the Tibetan plateau has been intensive over the last 40 years, mostly from drainage by humans. However, many previous studies have generally analysed only wetland ecological processes, despite the fact that grasslandificaiton, the biggest change process on the Tibetan plateau, has resulted from social and economic stresses. The assessment of changes to the soil C, N and P by grasslandification is the key to understanding the contribution to carbon management from alpine wetlands and variation of soil nutrition. We experimentally investigated the effect of grasslandification on soil physical (water, pH and EC) and chemical profiles (C, N and P) in grasslandification-pasture plots and reference wetland plots based on previous remote sensing results of the Maqu alpine wetland on the Tibetan plateau. The grasslandification process of alpine wetlands reduced vegetation quality and increased degree of drought, especially relevant with heavy grazing of the pasture. In general, grasslandification reduced the C, N and P content of soils and increased pH and EC, all significantly associated with variation to the vegetation and soil water. Soil C has changed more than N, P with grasslandification, but the soil C: N: P ratio has been relatively stable, and grasslandification has lead the wetland to the habitat with nitrogen limited. Thus, the grasslandification process of alpine wetlands on the Tibetan plateau over the last 40 years has increased net carbon emissions from alpine wetland soil contributions to atmospheric CO2. The grasslandification of alpine wetland is a drying process and observed changes were mainly influenced by variations of soil water and nutrients. Maintaining vegetation and soil water is an important approach to mitigating soil degradation and carbon emissions from alpine wetlands. In consideration of the current social and economic status of the study site, it is difficult to return or restore the grasslandification area to the original wetland, so the better strategy is to protect the existing wetland and reduce the human disturbance. (C) 2013 Elsevier B.V. All rights reserved.
英文关键词	Alpine wetland; Grasslandification; Carbon; Nitrogen; Phosphorus; Restoration
WOS研究方向	Environmental Sciences & Ecology ; Engineering
WOS类目	Ecology ; Engineering, Environmental ; Environmental Sciences
WOS关键词	LAND-USE CHANGE ; ORGANIC-CARBON ; SPATIAL-DISTRIBUTION ; MARSH SOILS ; WATER ; VEGETATION ; STORAGE ; MANAGEMENT ; BALANCE ; STOCKS
WOS记录号	WOS:000323610200024
来源期刊	ECOLOGICAL ENGINEERING
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/239382
作者单位	[Shang, Z. H.; Long, R. J.] Lanzhou Univ, Int Ctr Tibetan Plateau Ecosyst Management, State Key Lab Grassland Farming Syst, Coll Pastoral Agr Sci & Technol, Lanzhou 730020, Peoples R China; [Shang, Z. H.] Chinese Acad Sci, Inst Tibetan Plateau Res, Beijing 10085, Peoples R China; [Feng, Q. S.] Lanzhou Univ, Coll Pastoral Agr Sci & Technol, State Key Lab Grassland Farming Syst, Lanzhou 730020, Peoples R China; [Wu, G. L.] Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Peoples R China; [Ren, G. H.] Lanzhou Univ, Int Ctr Tibetan Plateau Ecosyst Management, State Key Lab Grassland Farming Syst, Lanzhou 730020, Peoples R China
推荐引用方式 GB/T 7714	Shang, Z. H.,Feng, Q. S.,Wu, G. L.,et al. Grasslandification has significant impacts on soil carbon, nitrogen and phosphorus of alpine wetlands on the Tibetan Plateau[J]. 中国科学院西北生态环境资源研究院,2013,58.
APA	Shang, Z. H.,Feng, Q. S.,Wu, G. L.,Ren, G. H.,&Long, R. J..(2013).Grasslandification has significant impacts on soil carbon, nitrogen and phosphorus of alpine wetlands on the Tibetan Plateau.ECOLOGICAL ENGINEERING,58.
MLA	Shang, Z. H.,et al."Grasslandification has significant impacts on soil carbon, nitrogen and phosphorus of alpine wetlands on the Tibetan Plateau".ECOLOGICAL ENGINEERING 58(2013).