Mapping the Extent of Invasive Phragmites australis subsp. australis From Airborne Hyperspectral Imagery

Invasive species pose one of the greatest threats to global biodiversity. Early detection invasive is critical in order prevent or manage their spread before they exceed ability land management groups control them. Optical remote sensing has been established as a useful technology for early and mapping vegetation populations. Through use airborne hyperspectral imagery (HSI), this study establishes target methodology used identify map reed Phragmites australis subsp. within entire extent Îles-de-Boucherville National Park (Quebec, ON, Canada). We applied Spectral Angle Mapper (SAM) algorithm trained with high accuracy GNSS ground truth data set produce park-wide illustrating detected . The total coverage was 26.74 ha (0.267 km 2 ), which represents 3.28% park area 814 (8.14 ). inherent spatial uncertainty HSI (∼2.25 m) accounted buffers, which, when included measurement , lead 59.17 (0.591 7.26% park. overall 84.28%, sensitivity 76.32% specificity 91.57%. Additionally, visual interpretation validation dataset performed by 10 individuals, compare performance that algorithm. lower than (i.e., 69.18%, 59.21% 78.31%). Overall, first utilize over moderately large extent. uses limitations such an approach are established, described here detail could be adapted future studies other species, native invasive, at sites around world.