Authors: Le Wang*, SUNY at Buffalo
Topics: Remote Sensing, Biogeography
Keywords: Remote Sensing, Landsat, Invasive Species
Session Type: Paper
Start / End Time: 1:20 PM / 3:00 PM
Room: Estherwood, Sheraton, 4th Floor
Presentation File: No File Uploaded
Saltcedar (Tamarix spp.), a weedy, invasive vegetation species introduced to the U.S. from Europe and Asia in the mid 19th century, has become one of the most invasive vegetation species in the United States and one of the greatest invasive threats to western riparian ecosystems. Accurate mapping of saltcedar distribution and abundance in a timely manner plays a central role to assist the undertaking of an effective control. The objective of this study is to develop sub-pixel remote sensing techniques to determine distributions of invasive Tamarix spp. and associated native riparian species within the past 30 years along the Rio Grande River. A new sub-pixel analysis method, Tessellated Linear Spectral Unmixing (TLSU), was devised and applied to 19 Landsat TM scenes acquired during the past thirty years. Our research has found that saltcedar is expanding its geographical range and replacing native vegetation while forming more regular shaped patches, indicating greater adaptations.