气候变化领域集成服务门户(CCPortal): Identifying the effects of chronic saltwater intrusion in coastal floodplain swamps using remote sensing

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DOI	10.1016/j.rse.2021.112385
	Identifying the effects of chronic saltwater intrusion in coastal floodplain swamps using remote sensing
	White E.; Jr; Kaplan D.
发表日期	2021
ISSN	00344257
卷号	258
英文摘要	Coastal floodplain swamps (CFS) are an important part of the coastal wetland mosaic, however they are threatened due to accelerated rates of sea level rise and saltwater intrusion (SWI). While remote sensing-based detection of wholesale coastal ecosystem shifts (i.e., from forest to marsh) are relatively straightforward, assessments of chronic, low-level SWI into CFS using remote sensing have yet to be developed and can provide a critical early-warning signal of ecosystem deterioration. In this study, we developed nine ecologically-based hypotheses to test whether remote sensing data could be used to reliably detect the presence of CFS experiencing SWI. Hypotheses were motivated by field- and literature-based understanding of the phenological and vegetative dynamics of CFS experiencing SWI relative to unimpacted, control systems. Hypotheses were organized into two primary groups: those that analyzed differences in summary measures (e.g., median and distribution) between SWI-impacted and unimpacted control sites and those that examined timeseries trends (e.g., sign and magnitude of slope). The enhanced vegetation index (EVI) was used as a proxy for production/biomass and was generated using MODIS surface reflectance data spanning 2000 to 2018. Experimental sites (n = 8) were selected from an existing network of long-term monitoring sites and included 4 pairs of impacted/non-impacted CFS across the northern Gulf of Mexico from Texas to Florida. The four best-supported hypotheses (81% across all sties) all used summary statistics, indicating that there were significant differences in the EVI of CFS experiencing chronic, low-level SWI compared to controls. These hypotheses were tested using data across a large and diverse region, supporting their implementation by researchers and managers seeking to identify CFS undergoing the first phases of SWI. In contrast, hypotheses that assessed CFS change over time were poorly supported, likely due to the slow and variable pace of ecological change, relatively short remote sensing data record, and/or specific site histories. Overall, these results show that remote sensing data can be used to identify differences in CFS vegetation associated with long-term, low-level SWI, but further methodological advancements are needed to reliably detect the temporal transition process. © 2021 Elsevier Inc.
英文关键词	Climate change; Coastal floodplain swamps; EVI; Ghost Forest; Google Earth Engine; MODIS; Remote sensing; Saltwater intrusion; Sea level rise
语种	英语
scopus关键词	Banks (bodies of water); Climate change; Deterioration; Ecosystems; Floods; Forestry; Radiometers; Sea level; Vegetation; Wetlands; Coastal floodplain swamp; Coastal wetlands; Enhanced vegetation index; Flood plains; Ghost forest; Google earth engine; Remote sensing data; Remote-sensing; Saltwater intrusion; Sea level rise; Remote sensing; coastal wetland; early warning system; endangered species; environmental degradation; floodplain; habitat mosaic; identification method; MODIS; remote sensing; saline intrusion; satellite data; sea level change; swamp; Atlantic Ocean; Florida [United States]; Gulf of Mexico; Texas; United States; Florida
来源期刊	Remote Sensing of Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/178885
作者单位	Environmental Sciences Department, University of Virginia, Charlottesville, VA 22930, United States; Engineering School of Sustainable Infrastructure and Environment, Environmental Engineering Sciences Department, University of Florida, Gainesville, FL 32611, United States
推荐引用方式 GB/T 7714	White E.,Jr,Kaplan D.. Identifying the effects of chronic saltwater intrusion in coastal floodplain swamps using remote sensing[J],2021,258.
APA	White E.,Jr,&Kaplan D..(2021).Identifying the effects of chronic saltwater intrusion in coastal floodplain swamps using remote sensing.Remote Sensing of Environment,258.
MLA	White E.,et al."Identifying the effects of chronic saltwater intrusion in coastal floodplain swamps using remote sensing".Remote Sensing of Environment 258(2021).