ECSA Symposium 44. First results in the use of hyperspectral reflectance data on spartina alterniflora marsh characterization. G.Trilla., M. Beget., P. Kandus., J. Marcovecchio., C. Di Bella., P.Oricchio., Paula D. Pratolongo. Bahía Blanca, Argentina. September 29 to October 3, 2008