Coral reef ecosystem monitoring using remote sensing data: case study in Owi Island, Biak, Papua

摘要

Coral reef ecosystem is a typical ecosystem in tropical marine and important for coastal island communities, including in Owi Island. This study aims to know a condition of coral reef covered area in Owi Island using Rapideye imagery satellite. This study used the "depth invariant index" method using bands 1 and bands 2 is Y = In (bands 1)-ki/kj In (bands 2) with unsupervised classification and field observation directly using manta tow method. The results show that area or percent cover of live coral is 23 ha (22%) and dead coral 21.46 ha (20%). Meanwhile, percent cover live coral using manta tow method between ll%-30% and dead coral between 31%-50%. The overall accuracy satellite imagery for mapping benthic habitats is 73.42% and coefficient kappa is 0.67.