Download - Marine Spatial Ecology Lab
Downloaded By: [University of Queensland] At: 11:40 13 November 2010238Cover(Zieman 1982). The red crosses (® gure 2) mark two large blow-out features. Muchof the lighter brown in the image represents lower biomass seagrass stands.The textured brown and tan patch with the blue cross at its centre marks a zoneof large coral heads, dominated by the species Montastrea annularis and Poritesporites (® gure 4). The high resolution permits the mapping of this reef habitat andeven the location of individual reef heads which are typically only 1± 3 m in diameter.The brown-red colouration around the southern shores of Dove Cay demarcates amore diverse reef habitat with large colonies of Acropora palmata dominating theFigure 1. Airborne multi-spectral image of seagrass and reef habitats o the shore of SouthCaicos, British West Indies. The small island in the south is Dove Cay. The very highresolution (1 m by 1 m pixels), permits `blow outs’ in the seagrass meadows andindividual coral reef heads to be detected. The image is a colour composite using twoblue and one green waveband and has been decorrelation stretched to maximize colourseparability.