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All Journal Jurnal Sains Teknologi dan Lingkungan (JSTL) Jurnal Perikanan
Hotmariyah, Hotmariyah
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Agriculture, Biological Sciences & Forestry Computer Science & IT Public Health

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BIODIVERSITAS MAKROALGA DI KAWASAN KONSERVASI GILI MATRA Rahmi, Disa Aulia; Jefri, Edwin; Buhari, Nurliah; Hotmariyah, Hotmariyah
Jurnal Perikanan Unram Vol 15 No 1 (2025): JURNAL PERIKANAN
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jp.v15i1.923

Abstract

Macroalgae are a group of lower marine plants commonly referred to as thalloid plants. The diversity of macroalgae in tropical regions, particularly in eastern Indonesia, is very high due to the area being part of the Wallacea region. This study aims to determine the level of diversity and distribution of macroalgae in these waters. The method used is the line transect method, with data analysis including ecological indices and distribution patterns. The results show that the diversity index ranges from 2.45 to 2.80, which falls into the medium category. The evenness index ranges from 0.80 to 0.81, classified as high, while the dominance index ranges from 0.09 to 0.11, which is considered low. The distribution pattern of macroalgae at stations 1, 2, and 3 ranges from 1.37 to 1.49, indicating a clustered distribution pattern. This suggests that the environmental conditions in the waters of Gili Air are stable and conducive to the growth of macroalgae, with no species dominating the ecosystem.
Spatial Distribution and Utilization of Marine Habitats by Green Turtle (Chelonia mydas) and Hawksbill Turtle (Eretmochelys imbricata) in the Gili Matra Island Marine Protected Area Lestariningsih, Wiwid Andriyani; Himawan, Mahardika Rizqi; Rahman, Ibadur; Araujo, Gonzalo; Adiwijaya, Cakra; Khaldun, Muhammad Hafidz Ibnu; Cahaya, Himaya Kartika; Alam, Dita Hikmatul; Hotmariyah, Hotmariyah
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 11 No. 2 (2025): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v11i2.869

Abstract

Sea turtles are one of the key biota in coastal and marine ecosystems whose existence is not only ecologically important, but also holds social, cultural, and economic value. Indonesia, as the largest archipelagic country in the world, is home to six of the world’s seven sea turtle species, making it a globally significant habitat for the sea turtle life cycle. The Gili Matra Marine Protected Area, encompassing the three islands of Gili Trawangan, Gili Meno, and Gili Air, is one of the strategic regions with high potential for sea turtle conservation. This study aims to document and analyze the spatial distribution and habitat use of green turtles (Chelonia mydas) and hawksbill turtles (Eretmochelys imbricata) in the Gili Matra Marine Protected Area. Data collection was carried out during the period of September to October 2024, adjusted to weather conditions and water visibility. The method used was the Underwater Turtle Visual Census Methodology. The composition of sea turtle species and habitat characteristics were analyzed using descriptive analysis to summarize the patterns of species presence, habitat types, and environmental conditions observed during the survey. The findings indicate that the area supports both species, with sea turtles observed at various depths (9–16 meters) across multiple dive sites. The predominance of female individuals and the variation in species presence across sites suggest species specific habitat preferences and potential influences of environmental conditions. Both sea turtle was mostly observed in locations associated with coral reef structures.
Co-Authors Adiwijaya, Cakra Alam, Dita Hikmatul Araujo, Gonzalo Cahaya, Himaya Kartika Jefri, Edwin Khaldun, Muhammad Hafidz Ibnu Lestariningsih, Wiwid Andriyani Mahardika Rizqi Himawan Nurliah Buhari, Nurliah Rahman, Ibadur Rahmi, Disa Aulia