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p-Index From 2021 - 2026
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This Author published in this journals
All Journal East Asian Journal of Multidisciplinary Research (EAJMR)
Iswandi Wahab
Morotai Pacific University, North Maluku
Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Industrial & Manufacturing Engineering

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Coral Bleaching in Tanjung Dehegila Water, Morotai Island District Djainudin Alwi; Iswandi Wahab; Muh Irsan
East Asian Journal of Multidisciplinary Research Vol. 2 No. 2 (2023): February 2023
Publisher : PT FORMOSA CENDEKIA GLOBAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55927/eajmr.v2i2.3188

Abstract

This study aims to identify the types of corals that experience bleaching and the factors that cause it. This research was conducted in Tanjung Dehegila Waters, Morotai Island Regency, in August-September 2021. Data was collected using the Line Intercept Transect (LIT) and Photo Line Intercept Transect (LIT) methods. Observational data were analyzed descriptively. The identification results of coral bleaching species were dominated by the genus Acropora (branching corals), where species were found to be bleaching in almost all research stations, while coral bleaching in Tanjung Dehegila waters was more due to natural factors, namely high water temperatures ranging from 30-34 0C. The temperature conditions of these waters pass the optimum limit for coral reef life.
Analysis of Changes in the Coastaline of Tabailenge Island North Morotai District, Morotai Island Regency Kismanto Koroy; Nurafni; Marlin Chrisye Wattimena; Iswandi Wahab
East Asian Journal of Multidisciplinary Research Vol. 2 No. 3 (2023): March 2023
Publisher : PT FORMOSA CENDEKIA GLOBAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55927/eajmr.v2i3.3500

Abstract

Shoreline change is a process that occurs dynamically and changes in sea bathymetry. The process of adjusting the coastline is continuously carried out for a natural balance against various impacts that can affect changes in the coastline. The process of changing the coastline can occur naturally and is anthropogenic. Based on this description, it is necessary to study/research changes in the coastline seen from oceanographic factors in the form of currents on Tabailenge Island, North Morotai District, Morotai Island Regency. This research was conducted in November 2022 in the waters of Tabailenge Island, South Morotai District, Morotai Island Regency. Analysis was conducted using field data (primary) and Google Earth software image data (secondary). Analysis was carried out using image data from different years (2009, 2011, 2016, 2019, and 2021). The research phase begins with preparing photo image data that will be analyzed for changes in the coastline using satellite imagery from the Google Earth application for the observation periods of 2009, 2011, 2016, 2019, and 2021. Image data use the JPEG format for different months of observation depending on availability. Cloud-free data contained in Google Earth. Based on data from image interpretation in 2009, 2011, 2016, 2019, and 2021, digitization has been carried out to show that there has been a change in the coastline from year to year. Observation of image data for a period of ± 10 years shows that changes in the coastline occur due to the influence of oceanographic parameters such as currents.
Co-Authors Djainudin Alwi Kismanto Koroy Marlin C Wattimena Muh Irsan Nurafni