Mapping quasi-circular vegetation patch dynamics in the Yellow River Delta, China, between 1994 and 2016

Because of a decrease in water provision from the Yellow River and the influence of various human actions, the Shandong Yellow River Delta Wetland, selected a Ramsar Wetland of International Importance in 2013, has undergone substantial degradation. Although some restoration work has been undertaken...

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Autores principales:	Lei Shi, Qingsheng Liu, Chong Huang, Xing Gao, He Li, Gaohuan Liu
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Quasi-circular vegetation patch Patch dynamic monitoring Yellow River Delta Wetland of international importance Remote sensing Spontaneous revegetation Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/9202638457bf45c08ccffb50c49d90e1
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id	oai:doaj.org-article:9202638457bf45c08ccffb50c49d90e1
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spelling	oai:doaj.org-article:9202638457bf45c08ccffb50c49d90e12021-12-01T04:50:42ZMapping quasi-circular vegetation patch dynamics in the Yellow River Delta, China, between 1994 and 20161470-160X10.1016/j.ecolind.2021.107656https://doaj.org/article/9202638457bf45c08ccffb50c49d90e12021-07-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X21003216https://doaj.org/toc/1470-160XBecause of a decrease in water provision from the Yellow River and the influence of various human actions, the Shandong Yellow River Delta Wetland, selected a Ramsar Wetland of International Importance in 2013, has undergone substantial degradation. Although some restoration work has been undertaken, more adaptive active restoration strategies should be developed based on researches on spontaneous revegetation in this region. In this regard, the quasi-circular vegetation patches (QVPs), characterized by a rapid rate of succession, are thus considered as ideal research targets. The spatial and temporal quantification of QVPs is not only fundamental to determining QVP formation mechanism but also contributes to the development of adaptive restoration strategies for the degraded ecosystems. Therefore, we examined QVP dynamics over seven time periods spanning 22 years using one aerial photograph and seven high-spatial resolution satellite images. We found that although the total number of QVPs remained almost unchanged, the total area had an increasing trend, and that the shape index (SIi=Peremeteri2πAreai) of QVPs tended to initially increase and subsequently decrease, with QVPs finally attaining an almost circular shape. Observations for the period between 2000 and 2016 indicated that the area and shape of QVPs could reach maximum extents within about three years. This knowledge could provide a valuable basis for studying the interactions of QVPs with environment, and the implications/consequences to ecosystems, e.g., mechanisms of the evolution of ecosystems, ecological services etc. We accordingly suggest that developing a long-term remote sensing monitoring and ground-based survey program would make a significant contribution to developing a nature-based solution for the degraded ecosystems in the Yellow River Delta, China.Lei ShiQingsheng LiuChong HuangXing GaoHe LiGaohuan LiuElsevierarticleQuasi-circular vegetation patchPatch dynamic monitoringYellow River DeltaWetland of international importanceRemote sensingSpontaneous revegetationEcologyQH540-549.5ENEcological Indicators, Vol 126, Iss , Pp 107656- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Quasi-circular vegetation patch Patch dynamic monitoring Yellow River Delta Wetland of international importance Remote sensing Spontaneous revegetation Ecology QH540-549.5
spellingShingle	Quasi-circular vegetation patch Patch dynamic monitoring Yellow River Delta Wetland of international importance Remote sensing Spontaneous revegetation Ecology QH540-549.5 Lei Shi Qingsheng Liu Chong Huang Xing Gao He Li Gaohuan Liu Mapping quasi-circular vegetation patch dynamics in the Yellow River Delta, China, between 1994 and 2016
description	Because of a decrease in water provision from the Yellow River and the influence of various human actions, the Shandong Yellow River Delta Wetland, selected a Ramsar Wetland of International Importance in 2013, has undergone substantial degradation. Although some restoration work has been undertaken, more adaptive active restoration strategies should be developed based on researches on spontaneous revegetation in this region. In this regard, the quasi-circular vegetation patches (QVPs), characterized by a rapid rate of succession, are thus considered as ideal research targets. The spatial and temporal quantification of QVPs is not only fundamental to determining QVP formation mechanism but also contributes to the development of adaptive restoration strategies for the degraded ecosystems. Therefore, we examined QVP dynamics over seven time periods spanning 22 years using one aerial photograph and seven high-spatial resolution satellite images. We found that although the total number of QVPs remained almost unchanged, the total area had an increasing trend, and that the shape index (SIi=Peremeteri2πAreai) of QVPs tended to initially increase and subsequently decrease, with QVPs finally attaining an almost circular shape. Observations for the period between 2000 and 2016 indicated that the area and shape of QVPs could reach maximum extents within about three years. This knowledge could provide a valuable basis for studying the interactions of QVPs with environment, and the implications/consequences to ecosystems, e.g., mechanisms of the evolution of ecosystems, ecological services etc. We accordingly suggest that developing a long-term remote sensing monitoring and ground-based survey program would make a significant contribution to developing a nature-based solution for the degraded ecosystems in the Yellow River Delta, China.
format	article
author	Lei Shi Qingsheng Liu Chong Huang Xing Gao He Li Gaohuan Liu
author_facet	Lei Shi Qingsheng Liu Chong Huang Xing Gao He Li Gaohuan Liu
author_sort	Lei Shi
title	Mapping quasi-circular vegetation patch dynamics in the Yellow River Delta, China, between 1994 and 2016
title_short	Mapping quasi-circular vegetation patch dynamics in the Yellow River Delta, China, between 1994 and 2016
title_full	Mapping quasi-circular vegetation patch dynamics in the Yellow River Delta, China, between 1994 and 2016
title_fullStr	Mapping quasi-circular vegetation patch dynamics in the Yellow River Delta, China, between 1994 and 2016
title_full_unstemmed	Mapping quasi-circular vegetation patch dynamics in the Yellow River Delta, China, between 1994 and 2016
title_sort	mapping quasi-circular vegetation patch dynamics in the yellow river delta, china, between 1994 and 2016
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/9202638457bf45c08ccffb50c49d90e1
work_keys_str_mv	AT leishi mappingquasicircularvegetationpatchdynamicsintheyellowriverdeltachinabetween1994and2016 AT qingshengliu mappingquasicircularvegetationpatchdynamicsintheyellowriverdeltachinabetween1994and2016 AT chonghuang mappingquasicircularvegetationpatchdynamicsintheyellowriverdeltachinabetween1994and2016 AT xinggao mappingquasicircularvegetationpatchdynamicsintheyellowriverdeltachinabetween1994and2016 AT heli mappingquasicircularvegetationpatchdynamicsintheyellowriverdeltachinabetween1994and2016 AT gaohuanliu mappingquasicircularvegetationpatchdynamicsintheyellowriverdeltachinabetween1994and2016
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Mapping quasi-circular vegetation patch dynamics in the Yellow River Delta, China, between 1994 and 2016

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