Land-cover changes in an urban lake watershed in a mega-city, Central China

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	Land-cover changes in an urban lake watershed in a mega-city, Central China
	Li, Yan ; Zhao, Shuqing ; Zhao, Kun ; Xie, Ping ; Fang, Jingyun
刊名	ENVIRONMENTAL MONITORING AND ASSESSMENT
	2006-04-01
卷号	115 期号:1-3 页码:349-359
关键词	Central China Donghu Lake land cover change landscape characteristics remote sensing urbanization urban lake watershed
ISSN号	0167-6369
通讯作者	Fang, JY, Peking Univ, Coll Environm Sci, Dept Ecol, Minist Educ, Beijing 100871, Peoples R China
中文摘要	Urbanization can exert a profound influence on land covers and landscape characteristics. In this study, we characterize the impact of urbanization on land cover and lacustrine landscape and their consequences in a large urban lake watershed, Donghu Lake watershed (the largest urban lake in China), Central China, by using Landsat TM satellite images of three periods of 1987, 1993 and 1999 and ground-based information. We grouped the land covers into six categories: water body, vegetable land, forested land, shrub-grass land, open area and urban land, and calculated patch-related landscape indices to analyze the effects of urbanization on landscape features. We overlaid the land cover maps of the three periods to track the land cover change processes. The results indicated that urban land continuously expanded from 9.1% of the total watershed area in 1987, to 19.4% in 1993, and to 29.6% in 1999. The vegetable land increased from 7.0% in 1987, 11.9% in 1993, to 13.9% in 1999 to sustain the demands of vegetable for increased urban population. Concurrently, continuous reduction of other land cover types occurred between 1987 and 1999: water body decreased from 30.4% to 23.8%, and forested land from 33.6% to 24.3%. We found that the expansion of urban land has at least in part caused a decrease in relatively wild habitats, such as urban forest and lake water area. These alterations had resulted in significant negative environmental consequences, including decline of lakes, deterioration of water and air quality, and loss of biodiversity.
英文摘要	Urbanization can exert a profound influence on land covers and landscape characteristics. In this study, we characterize the impact of urbanization on land cover and lacustrine landscape and their consequences in a large urban lake watershed, Donghu Lake watershed (the largest urban lake in China), Central China, by using Landsat TM satellite images of three periods of 1987, 1993 and 1999 and ground-based information. We grouped the land covers into six categories: water body, vegetable land, forested land, shrub-grass land, open area and urban land, and calculated patch-related landscape indices to analyze the effects of urbanization on landscape features. We overlaid the land cover maps of the three periods to track the land cover change processes. The results indicated that urban land continuously expanded from 9.1% of the total watershed area in 1987, to 19.4% in 1993, and to 29.6% in 1999. The vegetable land increased from 7.0% in 1987, 11.9% in 1993, to 13.9% in 1999 to sustain the demands of vegetable for increased urban population. Concurrently, continuous reduction of other land cover types occurred between 1987 and 1999: water body decreased from 30.4% to 23.8%, and forested land from 33.6% to 24.3%. We found that the expansion of urban land has at least in part caused a decrease in relatively wild habitats, such as urban forest and lake water area. These alterations had resulted in significant negative environmental consequences, including decline of lakes, deterioration of water and air quality, and loss of biodiversity.
学科主题	Environmental Sciences
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Environmental Sciences
研究领域[WOS]	Environmental Sciences & Ecology
关键词[WOS]	EXPANSION
收录类别	SCI
语种	英语
WOS记录号	WOS:000238973500019
公开日期	2010-10-13
内容类型	期刊论文
源URL	[http://ir.ihb.ac.cn/handle/152342/8910]
专题	水生生物研究所_中科院水生所知识产出（2009年前）_期刊论文
作者单位	1.Peking Univ, Coll Environm Sci, Dept Ecol, Minist Educ, Beijing 100871, Peoples R China 2.Peking Univ, Minist Educ, Key Lab Earth Surface, Beijing 100871, Peoples R China 3.Chinese Acad Sci, Inst Hydrobiol, Wuhan, Peoples R China
推荐引用方式 GB/T 7714	Li, Yan,Zhao, Shuqing,Zhao, Kun,et al. Land-cover changes in an urban lake watershed in a mega-city, Central China[J]. ENVIRONMENTAL MONITORING AND ASSESSMENT,2006,115(1-3):349-359.
APA	Li, Yan,Zhao, Shuqing,Zhao, Kun,Xie, Ping,&Fang, Jingyun.(2006).Land-cover changes in an urban lake watershed in a mega-city, Central China.ENVIRONMENTAL MONITORING AND ASSESSMENT,115(1-3),349-359.
MLA	Li, Yan,et al."Land-cover changes in an urban lake watershed in a mega-city, Central China".ENVIRONMENTAL MONITORING AND ASSESSMENT 115.1-3(2006):349-359.