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Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Environmental Science / Faculty of Environmental Earth Science >
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Mapping the change of coral reefs using remote sensing and in situ measurements: a case study in Pangkajene and Kepulauan Regency, Spermonde Archipelago, Indonesia
| Title: | Mapping the change of coral reefs using remote sensing and in situ measurements: a case study in Pangkajene and Kepulauan Regency, Spermonde Archipelago, Indonesia |
| Authors: | Haya, La Ode Muhammad Yasir Browse this author | | Fujii, Masahiko Browse this author →KAKEN DB |
| Keywords: | Coral reefs | | Depth invariant index (DII) | | Multi-temporal Landsat | | Remote sensing |
| Issue Date: | Oct-2017 |
| Publisher: | Springer |
| Journal Title: | Journal of oceanography |
| Volume: | 73 |
| Issue: | 5 |
| Start Page: | 623 |
| End Page: | 645 |
| Publisher DOI: | 10.1007/s10872-017-0422-4 |
| Abstract: | As elsewhere in Indonesia, local inhabitants in the Pangkajene and Kepulauan (PANGKEP) Regency, Spermonde Archipelago area and along the south-west coast of Sulawesi traditionally regard the coral reefs as their livelihood source. Since human activities as well as natural disturbances pose major threats to the coral reefs, these livelihoods may also be at risk. Currently, no comprehensive information on the status and condition of coral reefs in this area is available for this resource management. We determined the changes of coral reef habitat over a period of 20 years from 1994 to 2014 using a satellite Landsat multi-temporal image substantiated with in situ measurement data collected in 2014. The spectral value of coral reefs was extracted from multi-temporal Landsat imagery data, while the diffuse attenuation coefficient of water was obtained by using statistical analysis between the ratio of live coral cover and the spectral value of the visible bands. By using the unsupervised classification integrated with the data ground truth, it is stated that there has been a decline in live coral cover over a period of 20 years from 7716 ha in 1994 to 4236 ha in 2014, with a degradation rate of 174 ha/year. Based on the results, the ratio of the coral cover in the coral reef transects varied from the average of 24% for live corals to 96% for coral rubbles, implying the degraded status of coral reefs in the study area. |
| Rights: | The final publication is available at Springer via http://dx.doi.org/10.1007/s10872-017-0422-4 |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/71562 |
| Appears in Collections: | 環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 藤井 賢彦
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