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Ecological Section

Carter, Gregory A. [1], Wells, Tami [1].

Hyperspectral Remote Sensing of Invasive Aquatic Plant Populations in the Mobile-Tensaw River Delta, Alabama.

The continuing spread of invasive plant species along the northern coast of the Gulf of Mexico threatens to severely impact native species and estuarine dynamics. It is expected that remote sensing will prove to be indispensable in locating and tracking changes in invasive populations which may occur following mitigation efforts, disturbance or new introductions. Hyperspectral imagery of the Mobile-Tensaw River Delta and northern Mobile Bay wetlands were acquired in September 2003 toward the development of optimal methods for remote detection and mapping of invasive aquatic plant populations. The airborne ITD VNIR 10E Hyperspectral Sensor (Institute for Technology Development, Stennis Space Center, MS) recorded data throughout the 340- 960 nm wavelength range in bandwidth increments of approximately 4 nm. The raw digital counts in each band were calibrated to percentage reflectance based on the known spectral reflectance of ground targets. Mean spectra derived from the imagery indicated a broad range in spectral features among approximately 20 indigenous plus non-indigenous species. Spectral reflectance divided by reflectance at 500 nm was quite effective in locating populations of the invasive common reed and water hyacinth at key numerator wavelengths of 667 nm and 470 nm, respectively. The imagery was also effective in delineating populations of non-invasive, indigenous species.

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Related Links:
Gulf Coast Geospatial Center

1 - University of Southern Mississippi, Gulf Coast Geospatial Center and Department of Coastal Sciences, 703 E. Beach Drive, P.O. Box 7000, Ocean Springs, Mississippi, 39564, USA

Remote Sensing
Spectral reflectance
vascular plants
Invasive Species.

Presentation Type: Oral Paper
Session: 37-12
Location: Salon A - Gov Ballroom/Hilton
Date: Tuesday, August 16th, 2005
Time: 5:00 PM
Abstract ID:131

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