干旱区生态环境知识资源中心(Arid): Detecting inundation thresholds for dryland wetland vulnerability

Arid

DOI	10.1016/j.advwatres.2019.04.016
	Detecting inundation thresholds for dryland wetland vulnerability
	Sandi, Steven G.1,2; Saco, Patricia M.1,2; Saintilan, Neil 3; Wen, Li 4; Riccardi, Gerardo 5; Kuczera, George 1,2; Willgoose, Garry 1,2; Rodriguez, Jose F.1,2
通讯作者	Rodriguez, Jose F.
来源期刊	ADVANCES IN WATER RESOURCES
ISSN	0309-1708
EISSN	1872-9657
出版年	2019
卷号	128 页码:168-182
英文摘要	Dryland wetlands receiving periodical floods are of key importance for ecological resilience. The inundation regime (i.e., frequency, duration, depth, and timing of inundation), is one of the major factors that determine the suitability of local conditions for specific wetland species. During droughts, inundation conditions can reach a threshold after which wetland vegetation could transition to dryland vegetation. This study analyses the response of vegetation to hydrologic variability in an arid wetland in Australia over a period of 22 years (including the Millennium drought) in order to identify inundation thresholds for transitions. We use numerical modelling, field observations and remote sensing data to relate continuous detailed simulations of the inundation regime with the response of patches of Common reed, Water couch and River red gum, three key vegetation associations in the study site. We focus in patches that were affected by the drought and presented dryland vegetation invasion as well as reference patches that remained healthy throughout the drought. On each patch, we compare annual and inter-annual simulated inundation regimes to the minimum inundation conditions that can support the specific vegetation, and we compute the percentage area of the patch that verifies minimum inundation for each year. We define this area percentage as minimum inundation index. This index is analysed in conjunction with Landsat derived information on green vegetation coverage (green Seasonal Fractional Cover) for the selected patches. We found that the minimum inundation index and inter annual frequency are able to describe the vegetation dynamics of the patches, which can be characterised by two distinct response modes that depend on a threshold value of the minimum inundation index. Inundation below the threshold noticeably leads to degraded vegetation, but the vegetation can recover quickly if this threshold is later maintained for one or two years. Values below the threshold for more extended periods (drought) result in a gradual decrease of wetland vegetation to almost complete disappearance after four years and subsequent dryland vegetation invasion.
英文关键词	Dryland wetlands Inundation modelling Seasonal fractional cover Minimum inundation requirements River red gum Terrestrial vegetation invasion Macquarie Marshes
类型	Article
语种	英语
国家	Australia ; Argentina
开放获取类型	Green Published
收录类别	SCI-E
WOS记录号	WOS:000468138400014
WOS关键词	GUM EUCALYPTUS-CAMALDULENSIS ; FLOODPLAIN-RIVER ECOSYSTEMS ; MURRAY-DARLING BASIN ; MACQUARIE MARSHES ; WATER MANAGEMENT ; VEGETATION ; REQUIREMENTS ; PERSISTENCE ; DYNAMICS ; PATTERNS
WOS类目	Water Resources
WOS研究方向	Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/213888
作者单位	1.Univ Newcastle, Ctr Water Secur & Environm Sustainabil, Callaghan, NSW 2308, Australia; 2.Univ Newcastle, Sch Engn, Callaghan, NSW 2308, Australia; 3.Macquarie Univ, Dept Environm Sci, N Ryde, NSW 2109, Australia; 4.NSW Off Environm & Heritage, Sci Div, Sydney, NSW 2000, Australia; 5.Natl Univ Rosario CIUNR, Dept Hydraul & Res Council, RA-2000 Rosario, Santa Fe, Argentina
推荐引用方式 GB/T 7714	Sandi, Steven G.,Saco, Patricia M.,Saintilan, Neil,et al. Detecting inundation thresholds for dryland wetland vulnerability[J],2019,128:168-182.
APA	Sandi, Steven G..,Saco, Patricia M..,Saintilan, Neil.,Wen, Li.,Riccardi, Gerardo.,...&Rodriguez, Jose F..(2019).Detecting inundation thresholds for dryland wetland vulnerability.ADVANCES IN WATER RESOURCES,128,168-182.
MLA	Sandi, Steven G.,et al."Detecting inundation thresholds for dryland wetland vulnerability".ADVANCES IN WATER RESOURCES 128(2019):168-182.