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All Journal Jurnal Teknologi Perikanan dan Kelautan Jurnal Laut Khatulistiwa Journal of Environmental Science and Sustainable Development
Rabiyanti, Intan
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Earth & Planetary Sciences Education Energy Environmental Science Library & Information Science Physics

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COMMUNITY STRUCTURE OF SEA URCHIN AS AN INDICATOR OF THE ECOLOGICAL BALANCE OF COASTAL AREAS Radjab, Abdul Wahab; Rabiyanti, Intan; Muharby, Fiqih
Journal of Environmental Science and Sustainable Development Vol. 6, No. 2
Publisher : UI Scholars Hub

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Abstract

Sea urchins, soft-shelled invertebrates (Echinoderms), crucially contribute to cleaning the ocean bottom. However, sea urchins in tropical waters like Indonesia have not yet been fully disclosed. This study was conducted at Hutumuri and Rutong waters, Ambon City. This study assessed physical-chemical parameters, sea urchin species composition, classification, and community structure. Employing the Line Transect method with 5x5 m quadrants and 50m transect spacing, data analysis included density, relative density, frequency of presence, diversity, uniformity, and dominance indices. Results indicated normal temperature and salinity at both stations, supporting sea urchin life, with rocky and sandy substrates deemed suitable. A total of 1,772 sea urchins were identified, led by Echinometra mathaei and lowest in Echinothrix calamaris. Classifying sea urchins revealed four species from three families: Echinometridae (Echinometra mathaei), Toxopneustidae (Tripneustes gratilla), and Diadeimatidae (Echinothrix calamaris and Diadema antillarium). Echinometra mathaei dominated Station 2 with 879 individuals, while Echinothrix calamaris was least abundant at Station 1, Echinometra mathaei density peaked at Station 1, while Echinothrix calamaris had the lowest at Station 2. Station 1 showed the highest diversity, Station 2 exhibited the highest uniformity, and Station 1 had the highest dominance. These findings offer insights for sustainable marine resource management in the studied area.
IDENTIFIKASI SAMPAH LAUT (MARINE DEBRIS) DI PANTAI PINTU KOTA DAN PANTAI AIRLOUW, KOTA AMBON Kubangun, Muhammad Tarmizi; Rabiyanti, Intan; Wahyudi, Agus; Mewar, Kamal
Jurnal Teknologi Perikanan dan Kelautan Vol 15 No 2 (2024): JUNI 2024
Publisher : Fakultas Perikanan dan Ilmu Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24319/jtpk.15.115-125

Abstract

Marine debris consists of solid organic and inorganic materials that do not easily decompose, accumulate, scattering across the sea and beaches. The waste problem remains a fundamental problem that has yet to be resolved in various parts of the world, including Ambon City. The data collection techniques were direct observation and waste sampling. Determination of the research location was adjusted to the tidal schedule in August 2023 at Pintu Kota Beach and Airlouw Beach, Ambon City. Results of the study showed that the types of waste obtained were plastic bottles, plastic cups, plastic pieces, plastic packaging, coconut fiber, dry leaves, logs, iron cans, iron scrap, sandals, pampers, cloth, styrofoam, sponges, paper, and others. The results of measuring rubbish at Pintu Kota Beach and Airlouw Beach fall into the mega-debris (>1 m) and macro-debris (>2.5 cm - <1 m) categories, but most of it is in the macro-debris category (>2.5 cm - <1 m), namely 2 cm - 1.74 m. The mass of waste with a high average yield was observed at Pintu Kota Beach, ranged from 100 g at low tide to 121 g at high tide. Meanwhile, the average mass of waste at Airlouw Beach was relatively low at 58 g at high tide and 61 g at low tide. Plastic waste and non-plastic waste were more commonly found during high flood tide. This is possibly due to high rainfall in the east monsoon in Ambon City, which causes currents and waves to carry garbage up to the coast.
Pengaruh Variasi Kedalaman terhadap Struktur Komunitas Ikan Terumbu Karang di Kepulauan Seribu, Jakarta Yudha, Firsta Kusuma; Sachio, Nikolas; Hidayati, Tirza; Fuadi, Itsar Nur; Assyifa, Siti Fatma; Rabiyanti, Intan; Afif, M. Irfan
Jurnal Laut Khatulistiwa Vol 8, No 3 (2025): October
Publisher : Dept. Marine Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/lkuntan.v8i3.98019

Abstract

Ikan terumbu karang merupakan salah satu kelompok biota dominan yang berperan penting dalam menjaga keseimbangan ekosistem terumbu karang. Penelitian ini bertujuan menganalisis kelimpahan dan biomassa ikan terumbu karang pada dua kedalaman berbeda di perairan Pulau Pramuka dan sekitarnya. Pengamatan dilakukan pada tujuh stasiun menggunakan metode Underwater Visual Census (UVC). -rata kelimpahan ikan pada kedalaman 3 m mencapai 46 ind/100 m², sedangkan pada kedalaman 10 m hanya 28 ind/100 m². Biomassa tertinggi pada kedalaman dangkal tercatat di Selatan Pulau Panggang sebesar 3.397,29 g/100 m², sementara biomassa terendah ditemukan di Utara Pulau Pramuka sebesar 677,84 g/100 m². Pada kedalaman 10 m, biomassa tertinggi terdapat di Selatan Pulau Air (5.301,68 g/100 m²) dan terendah di Dermaga 1 Pulau Pramuka (60,65 g/100 m²). Secara umum, ikan mayor mendominasi pada kedalaman dangkal, sedangkan ikan target lebih sering dijumpai pada kedalaman dalam. Temuan ini menunjukkan bahwa variasi kedalaman berpengaruh nyata terhadap struktur komunitas ikan terumbu karang melalui distribusi kelimpahan dan biomassa pada setiap lokasi pengamatan.
Co-Authors Abdul Wahab Radjab Afif, M. Irfan Agus Wahyudi Assyifa, Siti Fatma Fuadi, Itsar Nur Hidayati, Tirza Mewar, Kamal Muharby, Fiqih Sachio, Nikolas Yudha, Firsta Kusuma