干旱区生态环境知识资源中心(Arid): Using hydrological connectivity to detect transitions and degradation thresholds: Applications to dryland systems

Arid

DOI	10.1016/j.catena.2019.104354
	Using hydrological connectivity to detect transitions and degradation thresholds: Applications to dryland systems
	Saco, Patricia M.1; Rodriguez, Jose F.1; Moreno-de las Heras, Mariano 2,3; Keesstra, Saskia 1,4; Azadi, Samira 1; Sandi, Steven 1; Baartman, Jantiene 5; Rodrigo-Comino, Jesus 6,7; Julieta Rossi, Maria 1
通讯作者	Saco, Patricia M.
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2020
卷号	186
英文摘要	In arid and semi-arid ecosystems, shortage of water can trigger changes in landscapes' structures and function leading to degradation and desertification. Hydrological connectivity is a useful framework for understanding water redistribution and scaling issues associated with runoff and sediment production, since human and/or natural disturbances alter surface water availability and pathways increasing/decreasing connectivity. In this paper, we illustrate the use of the connectivity framework for several examples of dryland systems that are analysed at a variety of spatial and temporal scales. In doing so, we draw particular attention to the analysis of coevolution of system structures and function, and how they may drive threshold behaviour leading to desertification and degradation. We first analyse the case of semi-arid rangelands, where feedbacks between the decline in vegetation density and landscape erosion reinforces degradation processes driven by changes in connectivity until a threshold is crossed above which the return to a functional system is unlikely. We then focus on semi-arid wetlands, where decreases in water volumes promote terrestrial vegetation encroachment that changes drainage conditions and connectivity, potentially reinforcing redistribution of flow paths to other wetland areas. The analysis of dryland wetlands is based on a novel hydrologic connectivity index derived using inundation requirements for wetland vegetation associations. The examples presented highlight the need to incorporate a coevolutionary framework for the analysis of changing connectivity patterns and the emergence of thresholds in arid and semi-arid systems.
英文关键词	Semi-arid environments Landscape evolution Hydrological connectivity Geoecology Land degradation
类型	Article
语种	英语
国家	Australia ; Spain ; Netherlands ; Germany
收录类别	SCI-E
WOS记录号	WOS:000509817000015
WOS关键词	VEGETATION PATTERNS ; SEDIMENT CONNECTIVITY ; CLIMATE-CHANGE ; LAND-USE ; DESERTIFICATION ; LANDSCAPES ; FEEDBACKS ; FRAMEWORK ; SCALE ; MANAGEMENT
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314220
作者单位	1.Univ Newcastle, Civil Surveying & Environm Engn & Ctr Water Secur, Callaghan, NSW 2308, Australia; 2.Spanish Res Council IDAEA CSIC, Inst Environm Assessment & Water Res, Barcelona, Spain; 3.CSIC UV GV, Desertificat Res Ctr, CIDE, Moncada 46113, Valencia, Spain; 4.Wageningen Environm Res, Team Soil Water & Land Use, POB 47, NL-6700 AA Wageningen, Netherlands; 5.Wageningen Univ, Soil Phys & Land Management Grp, Droevendaalsesteeg 4, NL-6708 PB Wageningen, Netherlands; 6.Univ Trier, Dept Phys Geog, D-54296 Trier, Germany; 7.Univ Valencia, Soil Eros & Degradat Res Grp, Dept Geog, Avda Blasco Ibanez 28, Valencia 46010, Spain
推荐引用方式 GB/T 7714	Saco, Patricia M.,Rodriguez, Jose F.,Moreno-de las Heras, Mariano,et al. Using hydrological connectivity to detect transitions and degradation thresholds: Applications to dryland systems[J],2020,186.
APA	Saco, Patricia M..,Rodriguez, Jose F..,Moreno-de las Heras, Mariano.,Keesstra, Saskia.,Azadi, Samira.,...&Julieta Rossi, Maria.(2020).Using hydrological connectivity to detect transitions and degradation thresholds: Applications to dryland systems.CATENA,186.
MLA	Saco, Patricia M.,et al."Using hydrological connectivity to detect transitions and degradation thresholds: Applications to dryland systems".CATENA 186(2020).