干旱区生态环境知识资源中心(Arid): Spatial and temporal variation and driving factors of wetland in the Amu Darya River Delta, Central Asia

Arid

DOI	10.1016/j.ecolind.2022.108898
	Spatial and temporal variation and driving factors of wetland in the Amu Darya River Delta, Central Asia
	Zan, Chanjuan; Liu, Tie; Huang, Yue; Bao, Anming; Yan, Yuyan; Ling, Yunan; Wang, Zheng; Duan, Yongchao
通讯作者	Huang, Y
来源期刊	ECOLOGICAL INDICATORS
ISSN	1470-160X
EISSN	1872-7034
出版年	2022
卷号	139
英文摘要	The Aral Sea in Central Asia has shrunk by 90% since 1960. The resulting desertification and salt and dust storms have diminished biodiversity in the Amu Darya River Delta, triggering the Aral Sea Crisis. Timely monitoring of trends and spatial patterns in deltaic wetlands is beneficial for biodiversity conservation and ecological restoration. Existing studies have mainly focused on the response of vegetation and microbial communities to ecological changes while ignoring the indicative role of wetlands-associated changes. This study analyzed the spatial and temporal patterns of long time series wetland changes extracted from remote sensing imagery through cover frequency maps and landscape indices. The hydrological data, land use/land cover change maps, and statistical data were combined to explore the driving factors of wetland change over the past 40 years. The results showed that the wetland area increased by 2242.96 km(2) (90.72%) from 1977 to 2019. The wetland area increased at 268.01 km(2)/ a from the 1970s to the early 1990s, with a fluctuating change since 1994. Wetlands are mainly distributed in the transition zone between the delta and the Aral Sea, accounting for approximately 81.61% of the total wetland area. The proportion of wetlands on the east and west sides significantly expanded along the canal system, increasing from 0.13% in 1977 to 9.74% in 2019. The degree of fragmentation of the wetland landscape in the entire delta increased by 1.7 times. With decreasing runoff into the delta, the expansion of cultivated land and the construction of reservoirs and irrigation canals changed the spatio-temporal distribution of water resources. In contrast, agricultural irrigation has raised the groundwater level. Human activities, such as the expansion of cultivated land and the construction of reservoirs and irrigation canals, are the main reasons for the spatio-temporal changes in wetland distribution, and exacerbated the decrease in water flow into the Aral Sea and its shrinkage. The restoration of wetlands is not a proof of ecological improvement, it resulted from the redistribution of water resources in the delta. The increase in wetland area represents an apparent ecological contrast with the drying up of the Aral Sea, and the phenomenon is not conducive to the ecological restoration of the delta.
英文关键词	Wetland Amu Darya River Delta Aral Sea Human activity Water resource
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000860751800007
WOS关键词	ARAL SEA-WATER ; LANDSCAPE PATTERN ; MANAGEMENT ; RESOURCES ; LAKE ; PLATEAU ; IMPACT
WOS类目	Biodiversity Conservation ; Environmental Sciences
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/392320
推荐引用方式 GB/T 7714	Zan, Chanjuan,Liu, Tie,Huang, Yue,et al. Spatial and temporal variation and driving factors of wetland in the Amu Darya River Delta, Central Asia[J],2022,139.
APA	Zan, Chanjuan.,Liu, Tie.,Huang, Yue.,Bao, Anming.,Yan, Yuyan.,...&Duan, Yongchao.(2022).Spatial and temporal variation and driving factors of wetland in the Amu Darya River Delta, Central Asia.ECOLOGICAL INDICATORS,139.
MLA	Zan, Chanjuan,et al."Spatial and temporal variation and driving factors of wetland in the Amu Darya River Delta, Central Asia".ECOLOGICAL INDICATORS 139(2022).