Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.3390/rs5105064 |
Assessing Water Stress of Desert Tamarugo Trees Using in situ Data and Very High Spatial Resolution Remote Sensing | |
Chavez, Roberto O.1; Clevers, Jan G. P. W.1; Herold, Martin1; Acevedo, Edmundo2; Ortiz, Mauricio2,3 | |
通讯作者 | Chavez, Roberto O. |
来源期刊 | REMOTE SENSING
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ISSN | 2072-4292 |
出版年 | 2013 |
卷号 | 5期号:10页码:5064-5088 |
英文摘要 | The hyper-arid Atacama Desert is one of the most extreme environments for life and only few species have evolved to survive its aridness. One such species is the tree Prosopis tamarugo Phil. Because Tamarugo completely depends on groundwater, it is being threatened by the high water demand from the Chilean mining industry and the human consumption. In this paper, we identified the most important biophysical variables to assess the water status of Tamarugo trees and tested the potential of WorldView2 satellite images to retrieve these variables. We propose green canopy fraction (GCF) and green drip line leaf area index (DLLAI(green)) as best variables and a value of 0.25 GCF as a critical threshold for Tamarugo survival. Using the WorldView2 spectral bands and an object-based image analysis, we showed that the NDVI and the Red-edge Chlorophyll Index (CIRed-edge) have good potential to retrieve GCF and DLLAI(green). The NDVI performed best for DLLAI(green) (RMSE = 0.4) while the CIRed-edge was best for GCF (RMSE = 0.1). However, both indices were affected by Tamarugo leaf movements (leaves avoid facing direct solar radiation at the hottest time of the day). Thus, monitoring systems based on these indices should consider the time of the day and the season of the year at which the satellite images are acquired. |
英文关键词 | arid ecosystems water stress groundwater depletion LAI green canopy fraction satellite images vegetation indices pulvinar movement |
类型 | Article |
语种 | 英语 |
国家 | Netherlands ; Chile |
收录类别 | SCI-E |
WOS记录号 | WOS:000328614900016 |
WOS关键词 | ORIENTED IMAGE-ANALYSIS ; RED EDGE ; CANOPY ; CHLOROPHYLL ; PLANTS ; SOIL ; ARCHITECTURE ; REFLECTANCE ; FIELD ; SHAPE |
WOS类目 | Remote Sensing |
WOS研究方向 | Remote Sensing |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/179716 |
作者单位 | 1.Wageningen Univ, Lab Geoinformat Sci & Remote Sensing, NL-6700 AA Wageningen, Netherlands; 2.Univ Chile, Fac Ciencias Agron, Lab Relac Suelo Agua Planta, Santiago, Chile; 3.CEAF, Rengo, Chile |
推荐引用方式 GB/T 7714 | Chavez, Roberto O.,Clevers, Jan G. P. W.,Herold, Martin,et al. Assessing Water Stress of Desert Tamarugo Trees Using in situ Data and Very High Spatial Resolution Remote Sensing[J],2013,5(10):5064-5088. |
APA | Chavez, Roberto O.,Clevers, Jan G. P. W.,Herold, Martin,Acevedo, Edmundo,&Ortiz, Mauricio.(2013).Assessing Water Stress of Desert Tamarugo Trees Using in situ Data and Very High Spatial Resolution Remote Sensing.REMOTE SENSING,5(10),5064-5088. |
MLA | Chavez, Roberto O.,et al."Assessing Water Stress of Desert Tamarugo Trees Using in situ Data and Very High Spatial Resolution Remote Sensing".REMOTE SENSING 5.10(2013):5064-5088. |
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