Mapping marine habitats in Otago, Southern New Zealand

Colour aerial photographs and field surveys were used to assess the extent and dynamics of giant bladder kelp, Macrocystis pyrifera, and eelgrass, Zostera novazelandica, beds. A common framework was developed for acquiring, integrating and analysing the spatial data. The two biological systems present different remote sensing and management problems. These differences help demonstrate the need for specific consideration of natural biological cycles and local management issues when developing remote sensing projects for marine ecosystems. A good local understanding of the spatial and temporal dynamics of biological systems is essential to ensure that environmental indicators monitored using remote sensing are meaningful and that appropriate standards are set.