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All Journal Union: Jurnal Ilmiah Pendidikan Matematika Journal of Maritime Policy Science
Susanti, Angelina Dwi
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Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Law, Crime, Criminology & Criminal Justice Mathematics

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Coral Reef Bleaching Crisis: Impacts on Indonesia's Marine Ecosystems and Coastal Economy Susanti, Angelina Dwi; Silaban, Friska; Aritonang, Lambok Febryan; Sitompul, Yessi Tri Yosika br
Journal of Maritime Policy Science Vol. 2 No. 1 (2025): April, 2025
Publisher : Center for Maritime Policy and Governance Studies. Universitas Maritim Raja Ali Haji. Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31629/jmps.v2i1.7351

Abstract

Indonesia, as the world’s largest archipelagic state, is home to vast marine biodiversity, particularly coral reefs that support more than 25% of marine species despite covering less than 1% of the ocean floor. However, these vital ecosystems are increasingly threatened by climate-induced stressors such as rising sea surface temperatures and anthropogenic pressures including pollution, destructive fishing practices, and coastal development. The most visible manifestation of this crisis is coral bleaching, which compromises reef health and biodiversity. This study aims to explore the ecological and economic impacts of coral reef bleaching in Indonesia and propose strategic responses for sustainable marine governance. Employing a descriptive qualitative approach, the research draws upon peer-reviewed literature, government reports, and international assessments to analyze the drivers, consequences, and policy implications of coral bleaching. Findings reveal that elevated sea temperatures caused by global warming and phenomena like El Niño have led to mass coral bleaching events, reducing coral cover, disrupting marine food chains, and impairing ecosystem services. Socio-economically, the bleaching crisis has diminished fisheries productivity, reduced marine tourism revenue, and heightened economic vulnerability in coastal communities. Coral reef degradation also weakens natural coastal defenses, increasing exposure to storm damage. The study concludes that integrated policy interventions centered on conservation, community-based management, and climate adaptation are critical for reversing coral decline. Strengthening marine spatial planning, enforcing sustainable fishing regulations, and promoting blue economy principles can help safeguard coral reefs and enhance the resilience of Indonesia’s coastal economy.
Realistic mathematics education on arithmetic sequences and series material by calculating chair rows Gestikatama, Elvindi; Prasasti, Yuha Nissa; Susanti, Angelina Dwi; Hamidah, Dewi
UNION : Jurnal Ilmiah Pendidikan Matematika Vol 11 No 1 (2023)
Publisher : Universitas Sarjanawiyata Tamansiswa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30738/union.v11i1.12927

Abstract

This research was conducted at MTs Sunan Muria Ploso with the aim of describing the application of realistic mathematics education material of row and arithmetic series. Some research said that, in schools, applies mathematical concepts directly which causes students to feel bored quickly and the methods used are less varied. In order for mathematics learning to be creative, interesting and fun, then one way is to apply the Realistic Mathematics Learning approach. This research is a descriptive qualitative research with 40 students of class VIII-D MTs Sunan Muria Ploso as the subjects. Data collection techniques using the method of documentation, and interviews conducted by researchers with students. Data collection techniques using the method of documentation and interviews conducted by researchers with students. The sampling technique used was purposive sampling. The data analysis technique in this research is qualitative data analysis, which consists of data reduction, data presentation, and drawing conclusions. The research instrument is a test and interview guide. The results showed that the arithmetic series material can be applied well with the RME approach. The conclusion of this study is that the Learning with Realistic Mathematics approach can support students in understanding and determining arithmetic series formulas, students use various symbols in implementing them so as to help students understand the concepts of arithmetic series.
Co-Authors Aritonang, Lambok Febryan Friska Silaban Gestikatama, Elvindi Hamidah, Dewi Prasasti, Yuha Nissa Sitompul, Yessi Tri Yosika br