| Abstrak/Abstract |
Wakatobi islands, located in Indonesia, has an extensive of reef formation of, 8.816,169 ha. Coral reef and seagrass ecosystem are the dominant benthic habitat in the area. Currently, the condition of both ecosystems in Wakatobi island is not categorized as good in term of its coral cover as it has less than 50 % coral cover. For sustainable planning and management of key coastal ecosystems, such as seagrass and coral reefs, a detail information about the dynamic of their conditions is needed. By utilizing time-series Landsat satellites which can record benthic habitat condition of Wakatobi Islands in 1990, 2000, 2010, and 2017, the cover change of both ecosystems was produced. The objectives of this study are to determine areas that experienced drastic changes in benthic habitat cover through multitemporal Landsat satellite imagery and then to analyze the dynamics of the changes. The method used in this study is Change Detection in SPEAR Tools of ENVI software used to identify areas that experienced drastic changes. The next step was analyzing the cover change that occurred in the area by applying image processing to each image, including geometric correction, sunglint correction, water column correction, image masking, and image classification. The result of this study was the maps showing change of benthic habitat cover from 1990-2017 in every ten years periods. Using these maps, the status of coral reef and seagrass ecosystem conditions in Wakatobi Islands can be assessed afterwards. The result of this study can be useful for the government and stakeholders in optimizing coastal planning and conservation activities for coral reefs and seagrass ecosystems in a sustainable way. |
