01674nas a2200145   4500008004100000245011300041210006900154300001500223490000700238520110000245653002201345100001701367700001801384856012601402       1998                        eng d00aSeasonality of finely-resolved spatial structure of NDVI and its component reflectances in tallgrass prairie0 aSeasonality of finelyresolved spatial structure of NDVI and its   a3213 -32200 v193 aGrass canopies exhibit distinct seasonality in reflectance and spatial patterns in reflectance result from landscape heterogeneity. To investigate the spatial structure of NDVI and its two component reflectances at fine resolution in burned and unburned tallgrass prairie, we use range and relative nugget effect two indicators of spatial structure derived from semivariograms. Results show that spatial dependence of the three spectral measures are similar in the early season when the litter layer has been removed by burning and again in the later season when the canopy is senescent. However, as the canopy develops, the spatial dependence of NDVI deviates from that of its component reflectances. In the unburned canopy, red reflectance appears to strongly influence the spatial pattern of NDVI. In the burned canopy, neither component reflectance strictly determines the spatial pattern of NDVI. Maximum divergence in spatial pattern between NDVI and its components coincides with minimum available moisture, suggesting a relation between moisture stress and spatio-spectral heterogeneity.10atallgrass prairie1 aGoodin, D.G.1 aHenebry, G.M.  uhttp://129.130.186.12/content/seasonality-finely-resolved-spatial-structure-ndvi-and-its-component-reflectances-tallgrass