Close-range remote sensing of aquatic macrophyte vegetation cover
Abstract:This study used ground-based hyperspectral radiometry to examine variations in visible and near-infrared spectral reflectance of spatterdock (Nuphar polysepalum Engelm.) as a function of vegetation cover. Sites were sampled in Swan Lake in Grand Teton National Park, Wyoming, using a 512-band spectroradiometer to measure reflectance over the range 326.5-1055.3nm (visible-nearinfrared) and simultaneous estimates of spatterdock cover. Linear correlations between spatterdock cover and spectral reflectance were statistically significant at the 0.05 significance level in two specific ranges of the spectrum: 518-607 nm; and 697-900nm. Predictability of spatterdock cover using spectral variables was best using an NDVI transformation of the data in a non-linear equation (r2 = 0.95).
Document Type: Research Article
Affiliations: 1: Kansas Applied Remote Sensing (KARS) Program, 2291 Irving Hill Road, University of Kansas, Lawrence, Kansas 66045-2969, USA 2: Kansas Biological Survey, 2401 Constant Ave, University of Kansas, Lawrence, Kansas 66045-2969, USA 3: Department of Animal Ecology, 124 Science II, Iowa State University, Ames, Iowa 50011, USA
Publication date: 2000-12-15