Detecting and assessing Spartina invasion in coastal region of China: A case study in the Xiangshan Bay

	Detecting and assessing Spartina invasion in coastal region of China: A case study in the Xiangshan Bay
	Zhu Changming 1; Zhang Xin 1; Qi Jiaguo 1
刊名	ACTA OCEANOLOGICA SINICA
	2016
卷号	35 期号:4 页码:35-43
关键词	LAND-USE CHANGE DENSITY-FUNCTION FAVORITE PLACES DYNAMICS URBAN CLASSIFICATION BIODIVERSITY IMPACTS HABITAT SYSTEMS
通讯作者	Zhang, X (reprint author), Chinese Acad Sci, Inst Remote Sensing & Digital Earth, Beijing 100101, Peoples R China.
英文摘要	Spartina alterniflora is one of exotic plants along the coastal region in China. It was introduced as an important engineering approach to ecological restoration in the later 1970s. However, owing to its good adaptability and strong reproductive capacity, the introduced species is explosively spreading along the coastal region quickly and resulting in a significant impact on the health and safety of coastal wetland ecosystems. It is imperative to quantify the spatial extent and the rate of S. alterniflora sprawl in order to assess its ecological damages and economic impacts. Remote sensing techniques have been used to address these challenges but large unsuccessful due to mixed spectral properties. In this study, a hybrid method was proposed for S. alterniflora detection using medium resolution remote sensing images by integrating both spatial and spectral features of S. alterniflora. The hybrid method consists of two phases: (1) delineation of intertidal zone as the potential area of S. alterniflora distribution and (2) extraction of S. alterniflora fraction distribution with a mixture pixel analysis. The proposed method was tested at the Xiangshan Bay on the east coastal region of Zhejiang Province, China, and mapped the spatial extent of S. alterniflora with Landsat datasets in the 2003, 2009 and 2014. The results showed that, the S. alterniflora has grown exponentially over past 10 years. In 2003, the total area of S. alterniflora was about 590 hm(2), but quickly reached to 1 745 hm(2) in 2009, and 5 715 hm(2) in 2014. With a rate of approximately 10-folds growth within a decade, the invasive species almost occupied all muddy beaches to become the most dominant coastal salt vegetation in this region. It is believed that the strong biological reproductive capacity was the primary reason for such quick spread and at the same time human reclamation activities were also believed to have facilitated the environmental conditions for S. alterniflora sprawl.
学科主题	Oceanography
类目[WOS]	Oceanography
收录类别	SCI
语种	英语
WOS记录号	WOS:000374250700005
内容类型	期刊论文
源URL	[http://ir.radi.ac.cn/handle/183411/39476]
专题	遥感与数字地球研究所_SCI/EI期刊论文_期刊论文
作者单位	1.Jiangsu Normal Univ, Dept Geog & Environm, Xuzhou 221116, Peoples R China 2.Chinese Acad Sci, Inst Remote Sensing & Digital Earth, Beijing 100101, Peoples R China 3.Michigan State Univ, Ctr Global Change & Earth Observat, E Lansing, MI 48864 USA
推荐引用方式 GB/T 7714	Zhu Changming,Zhang Xin,Qi Jiaguo. Detecting and assessing Spartina invasion in coastal region of China: A case study in the Xiangshan Bay[J]. ACTA OCEANOLOGICA SINICA,2016,35(4):35-43.
APA	Zhu Changming,Zhang Xin,&Qi Jiaguo.(2016).Detecting and assessing Spartina invasion in coastal region of China: A case study in the Xiangshan Bay.ACTA OCEANOLOGICA SINICA,35(4),35-43.
MLA	Zhu Changming,et al."Detecting and assessing Spartina invasion in coastal region of China: A case study in the Xiangshan Bay".ACTA OCEANOLOGICA SINICA 35.4(2016):35-43.