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EVALUASI MULTITEMPORAL INDEKS KESEHATAN KARANG DI KAWASAN KONSERVASI PULAU PIEH DAN LAUT SEKITARNYA (2021-2024): ANALISIS BIOFISIK DAN IMPLIKASINYA TERHADAP PENGELOLAAN BERBASIS EKOSISTEM Noferya, Efi; Bengen, Dietriech Geoffrey; Zamani, Neviaty Putri; Ismet, Meutia Samira; Muslim, Ryan Adhitia; Arisandi, Defrian Marza; Rahmat, Fadhlan Basiluddin; Ilham, Yuwanda; Utama, Agung Putra; Yennafri, Yennafri; Samsuardi, Samsuardi; Miswandi, Muhammad
Jurnal Kebijakan Perikanan Indonesia Vol 17, No 1 (2025): (Mei) 2025
Publisher : Badan Penyuluhan dan Pengembangan Sumberdaya Manusia Kelautan dan Perikanan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/jkpi.17.1.2025.59-75

Abstract

Terumbu karang merupakan ekosistem laut yang memiliki peran penting dalam menjaga biodiversitas dan ketahanan lingkungan pesisir. Namun, dalam beberapa dekade terakhir, degradasi terumbu karang terus meningkat akibat aktivitas antropogenik dan perubahan iklim. Penelitian ini bertujuan untuk menganalisis Indeks Kesehatan Karang (Coral Health Index / CHI) di Kawasan Konservasi Pulau Pieh dan perairan sekitarnya dalam periode 2021-2024 menggunakan pendekatan biofisik dan statistik. Analisis dilakukan terhadap 16 stasiun pengamatan, menggunakan data parameter bentik (tutupan karang hidup, resiliensi) dan biomassa ikan karang yang diperoleh melalui metode Underwater Photo Transect (UPT) dan Underwater Visual Census (UVC). Hasil penelitian menunjukkan bahwa nilai CHI berkisar antara 3 hingga 10, dengan beberapa stasiun menunjukkan tren peningkatan sementara lainnya mengalami stagnasi atau penurunan. Analisis Spearman correlation mengindikasikan bahwa parameter kualitas air (pH, DO, suhu, dan salinitas) tidak memiliki hubungan signifikan terhadap CHI pada semua tahun pengamatan (p-value > 0,05). Analisis Principal Component Analysis (PCA) menunjukkan bahwa faktor kualitas air bukan penentu utama perubahan CHI, tetapi tekanan ekologis dan aktivitas antropogenik lebih berperan dalam menentukan kondisi kesehatan terumbu karang. Hasil penelitian ini memberikan rekomendasi untuk pengelolaan berbasis ekosistem guna menjaga keberlanjutan ekosistem terumbu karang.Coral reefs are marine ecosystems that play a crucial role in maintaining biodiversity and coastal environmental resilience. However, in recent decades, coral reef degradation has continued to increase due to anthropogenic activities and climate change. This study aims to analyze the Coral Health Index (CHI) in the Pieh Island Conservation Area and its surrounding waters from 2021 to 2024 using biophysical and statistical approaches. The analysis was conducted at 16 observation stations using benthic parameters (live coral cover, resilience) and reef fish biomass data collected through the Underwater Photo Transect (UPT) and Underwater Visual Census (UVC) methods. The results indicate that CHI values range from 3 to 10, with some stations showing an increasing trend while others experience stagnation or decline. Spearman correlation analysis indicates that water quality parameters (pH, DO, temperature, and salinity) do not have a significant relationship with CHI in all observation years (p-value > 0.05). Principal Component Analysis (PCA) shows that water quality factors are not the main determinants of CHI changes; instead, ecological pressure and anthropogenic activities play a more significant role in determining coral reef health. This study provides recommendations for ecosystem-based management to ensure the sustainability of coral reef ecosystems.
Phytoplankton in Eutrophic Waters of Hurun Bay: An Examination of Composition Patterns, Structure, and Impacts on Aquatic Ecosystems Munru, Maestro; Ismet, Meutia Samira; N.Natih, Nyoman Metta; Subhan, Beginer; Aziz, Nasrul
International Journal of Marine Engineering Innovation and Research Vol 9, No 3 (2024)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v9i3.21625

Abstract

Ecological conditions are shifting due to increased anthropogenic activities along coastal areas. These activities are affecting the life cycle of aquatic organisms, especially phytoplankton. This study, conducted in the unique ecosystem of Hurun Bay Lampung, aims to analyze the composition and structure of phytoplankton communities in eutrophic waters and water quality conditions. Sampling was conducted in two different months, August and October, by vertical hauling from a depth of 5 meters to the surface. The results revealed a rich diversity of phytoplankton, with 72 genera, 48 families, and 6 classes identified in August, and 55 genera, 42 families, and 6 classes identified in October. The diatom group was the most prevalent, accounting for over 90% of the total, with the highest abundance found in Skeletonema and Chaetoceros. The diversity, uniformity, and dominance indices were all in the low to medium category, indicating a balanced ecosystem
Toxicity and antibacterial activity of Rhizophora apiculata mangrove using different solvent extraction : Toksisitas dan aktivitas antibakteri mangrove Rhizophora apiculata dengan pelarut ekstraksi yang berbeda Imanditya, Muhammad Fachriza; Ismet, Meutia Samira; Zamani, Neviaty Putri; Natih, Nyoman MN; Srimariana, Endang Sunarwati; Andini, Rita; Anggraini, Nurlita Putri
Jurnal Pengolahan Hasil Perikanan Indonesia Vol. 28 No. 1 (2025): Jurnal Pengolahan Hasil Perikanan Indonesia 28(1)
Publisher : Department of Aquatic Product Technology IPB University in collaboration with Masyarakat Pengolahan Hasil Perikanan Indonesia (MPHPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17844/jphpi.v28i1.60031

Abstract

Rhizophora apiculata merupakan jenis mangrove yang banyak digunakan sebagai obat tradisional. Potensi ini dihasilkan oleh kandungan metabolit sekunder yang dapat dipengaruhi oleh kondisi lingkungan, usia, dan beragam faktor lainnya. Penelitian ini bertujuan untuk menentukan pelarut terbaik ekstrak R. apiculate berdasarkan parameter toksisitas dan antibakteri. R. apiculata yang digunakan dalam penelitian ini berasal dari daerah Kuala Langsa dan Pulau Telaga Tujuh (Aceh Timur), dengan ukuran diameter pohon yang berbeda (2,4; 4,8; 5; 13; 23,3; & 26 cm). Ekstraksi dengan pelarut metanol 99,8% (MeOH) dan etanol 99,9% (EtOH) dilakukan dengan maserasi (3x24 jam), ekstraksi dengan pelarut akuades dilakukan dengan perebusan (15 menit pada suhu 85-90°C). Ekstraksi menggunakan perbandingan 10:1 (v/w) dengan 2 g serbuk simplisia dan 20 mL pelarut. Uji toksisitas dilakukan dengan metode brine shrimp lethality assay dan uji antibakteri menggunakan metode disk diffusion assay. Uji toksisitas menunjukkan ekstrak etanol memiliki nilai toksisitas tertinggi dengan nilai LC50 sebesar 26,879 μg/mL. Ekstrak akuades menghasilkan zona hambat tertinggi dengan nilai 11,37±0,85 mm pada bakteri Escherichia coli dan 17,67±1,19 mm pada bakteri Staphylococcus aureus. Hasil ANOVA dua arah menunjukkan pelarut berpengaruh nyata terhadap zona hambat bakteri (p<0,05), sementara diameter pohon tidak berpengaruh nyata (p<0,05). Ekstrak pelarut etanol menghasilkan nilai toksisitas tertinggi, sedangkan ekstrak pelarut akuades menghasilkan zona hambat terbesar.
AKUMULASI MIKROPLASTIK PADA SPESIES IKAN EKONOMIS PENTING DI PERAIRAN PULAU BARRANGLOMPO, MAKASSAR Sawalman, Rahmat; Zamani, Neviaty Putri; Werorilangi, Shinta; Ismet, Meutia Samira
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 13 No. 2 (2021): Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jitkt.v13i2.34587

Abstract

Mikroplastik (MP) telah ditemukan di berbagai lingkungan laut khususnya pada ikan, dan informasi terkait akumulasi mikroplastik pada organ-organ ikan masih sangat terbatas. Penelitian ini bertujuan untuk membuktikan keberadaan mikroplastik pada organ insang, saluran pencernaan, dan daging ikan ekonomis penting (Hemiramphus far, Siganus virgatus, dan Lethrinus lentjan) di perairan Pulau Barranglompo, Makassar, serta mengidentifikasi karakteristik mikroplastik meliputi warna, bentuk, dan ukuran. Setiap organ diekstraksi menggunakan KOH 20% dan pengamatan karakteristik MP dilakukan secara visual menggunakan mikroskop stereo. Hasil penelitian menunjukkan bahwa mikroplastik ditemukan di insang, saluran pencernaan, dan daging dari ketiga spesies ikan. Tingkat deteksi mikroplastik pada masing-masing H. far, S. virgatus, dan L. lentjan adalah 100%, 100%, dan 82%. Karakteristik warna mikroplastik didominasi oleh biru, bentuk mikroplastik didominasi oleh line, dan kisaran ukuran mikroplastik didominasi 1–5 mm. Penelitian lebih lanjut perlu dilakukan untuk melihat akumulasi mikroplastik pada setiap organ secara eksperimental di laboratorium.
KONSENTRASI LOGAM BERAT PADA KERANG HIJAU (Perna viridis) TELUK LAMPUNG DAN RESISTENSI BAKTERI SIMBIONNYA Aznardi, Shodikin Aznardi; Madduppa, Hawis; Ismet, Meutia Samira
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 14 No. 3 (2022): Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jitkt.v14i3.38946

Abstract

Kerang hijau merupakan organisme laut yang terancam karena kontaminasi logam berat seperti timbal dan tembaga yang ada pada perairan Teluk Lampung. Selain mengancam organisme kerang, logam berat juga menjadi ancaman bagi organisme simbion. Bakteri yang terpapar logam berat secara terus menerus nantinya akan bisa beradaptasi (resistansi) dengan cemaran logam berat. Penelitian ini bertujuan untuk mengetahui kemampuan bioakumulasi kerang hijau asal Teluk Lampung dan menguji kemampuan resistensi bakteri simbion terhadap logam berat timbal (Pb) dan tembaga (Cu) serta melakukan identifikasi molekular untuk mengetahui jenis dari bakteri simbion yang terpilih. Penelitian ini dilakukan dengan menganalisis kandungan logam berat pada sampel air dan kerang hijau kemudian diisolasi bakteri simbionnya dan diseleksi menggunakan media Luria Bertani agar dengan menambahkan konsentrasi logam berat, kemudian diuji tingkat ketahanannya terhadap logam berat Pb dan Cu yang ditambahkan terus menerus dari konsentrasi 100 ppm sampai 1000 ppm hingga bakteri tidak dapat tumbuh lagi secara maksimal. Setelah itu, dilakukan identifikasi molekular untuk mengetahui jenis bakteri dan direkonstruksi untuk melihat kedekatan molekular. Hasil penelitian menunjukkan bahwa air dan kerang hijau telah melebihi baku mutu dan isolat bakteri resisten terhadap logam berat Pb pada kisaran 100-1000 ppm dan logam berat Cu pada kisaran 100-700 ppm. Identifikasi molekular terhadap sampel terpilih yaitu STL09 dan STL11 menunjukkan bahwa bakteri simbion merupakan jenis dari spesies bakteri Bacillus sp.
Phytoplankton in Eutrophic Waters of Hurun Bay: An Examination of Composition Patterns, Structure, and Impacts on Aquatic Ecosystems Maestro Munru; Meutia Samira Ismet; yoman Metta N Natih; Beginer Subhan; Nasrul Aziz
International Journal of Marine Engineering Innovation and Research Vol. 9 No. 3 (2024)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v9i3.4917

Abstract

Ecological conditions are shifting due to increased anthropogenic activities along coastal areas. These activities are affecting the life cycle of aquatic organisms, especially phytoplankton. This study, conducted in the unique ecosystem of Hurun Bay Lampung, aims to analyze the composition and structure of phytoplankton communities in eutrophic waters and water quality conditions. Sampling was conducted in two different months, August and October, by vertical hauling from a depth of 5 meters to the surface. The results revealed a rich diversity of phytoplankton, with 72 genera, 48 families, and 6 classes identified in August, and 55 genera, 42 families, and 6 classes identified in October. The diatom group was the most prevalent, accounting for over 90% of the total, with the highest abundance found in Skeletonema and Chaetoceros. The diversity, uniformity, and dominance indices were all in the low to medium category, indicating a balanced ecosystem.
Effective DNA extraction method for metagenomic analysis of rhizosphere bacteria from mangrove sediments Siti Maysaroh; Meutia Samira Ismet; Beginer Subhan; Rita Andini; Enny Rimita Sembiring; Nurlita Putri Anggraini
Depik Vol 12, No 2 (2023): AUGUST 2023
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.12.2.32850

Abstract

Mangrove, Rhizophora mucronata, grows in the intertidal area, which contains much organic matter and varying salinity. The organic matter content is influenced by the bacterial community that inhabits the ecosystem, but information regarding the bacterial community, especially in the mangrove root system, is not widely available. There are several challenges in completing this information, one of which is that the method used is still in a conventional form. Developments in environmental DNA analysis can support and complement this information. However, this method must be optimized because the organic matter content and salt variations affect the extraction results. Thus, this study aimed to determine the optimal approach for extracting bacterial DNA from mangrove sediments. The analysis used two methodologies: manual DNA extraction techniques based on buffer modification and DNA extraction kits. There were four different treatments, namely the soil DNA isolation plus kit (M1), the fecal / soil microbial quick-DNA miniprep kit (M2), glass powder with charcoal (M3), and glass powder with skimmed milk (M4). DNA samples were obtained from each method and assessed for concentration and purity using a nanodrop. In addition, the resulting DNA's quality was analyzed using 1.5% agarose. The results obtained were in the M2 treatment, which showed optimal results compared to the others. M2 uses a bead-based beating and spin column method to achieve optimal DNA concentration through high molecular weight. The DNA obtained was also protein-free, and several samples were contaminated with humic acid, namely KL.S1, KL.S4, and T7.S4.Keywords:Bacteria 16SBead beatingDNA ExtractionSedimentSpin column
Analysis of Abundance and Composition of Culturable Bacteria and Their Relationship with Water Quality Parameters in Intensive Shrimp Ponds Gede Iwan Setiabudi; Kadek Lila Antara; Hamdanul Fain; Meutia Samira Ismet
Advances in Tropical Biodiversity and Environmental Sciences Vol. 10 No. 1 (2026): February 2026
Publisher : Institute for Research and Community Services Udayana University (LP2M Universitas Udayana)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/ATBES.2026.v10.i01.p01

Abstract

Intensive cultivation of Pacific white shrimp (Penaeus vannamei) is a crucial pillar of the aquaculture economy, but it faces sustainability challenges due to water-quality degradation driven by microbial activity. This study aims to analyze the total bacterial count (TBC) and total Vibrio count (TVC), identify the dominant culturable bacterial genera, and determine their statistical relationship with physicochemical water quality parameters in intensive shrimp ponds. The research methodology included regular sampling of water and sediment over one cultivation cycle. Water quality was analyzed using standard methods, while bacterial enumeration was performed using the spread plate technique on Marine Agar and Thiosulfate Citrate Bile Salts Sucrose Agar media. Pearson's correlation analysis was used to test the relationship between variables. The results show that some water quality parameters, particularly ammonia and TOM, tended to increase and exceed the SNI 01-7246-2006 quality standard as the cultivation cycle progressed. The abundance of TBC and TVC in sediment (average 106−107CFU/g) was significantly higher than in the water column (average 104−105 CFU/mL). Correlation analysis revealed a strong and significant negative relationship between DO and TBC (r=−0.85, p<0.01) and TVC (r=−0.79, p<0.01). Conversely, a strong and significant positive correlation was found between TOM and TBC (r=0.91, p<0.01) and TVC (r=0.88, p<0.01), as well as between ammonia and both TBC and TVC. It is concluded that the abundance of culturable bacteria, especially TBC and TVC, serves as a sensitive biological indicator of organic load and ecological stress in intensive pond systems. The strong predictive relationship between these microbial metrics and key parameters, such as DO and TOM, underscores the importance of microbiological monitoring for proactive management and improved sustainability in aquaculture.
Morphometric Features of Noctiluca scintillans from Jakarta Bay Radixa Radhya Ramadhan Haryanto; Meutia Samira Ismet; Adriani Sunuddin; Inna Puspa Ayu; Muhammad Izzat Nugraha; Alfaiz Arselan; Kesha Mufthi Java Tanaya; Dea Fauzia Lestari; Dondy Arafat; Nadya Cakasana; Beginer Subhan
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 31, No 2 (2026): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.31.2.133-144

Abstract

Noctiluca scintillans is a mixotrophic dinoflagellate commonly associated with eutrophic coastal systems and bloom dynamics. This study aims to characterize the morphometric variability of N. scintillans in Jakarta Bay, a tropical coastal environment strongly influenced by anthropogenic nutrient enrichment, and to evaluate how cellular morphology reflects functional and ecological responses under eutrophic conditions. Plankton samples were collected in February 2024 and analyzed using high-resolution microscopy to quantify key morphometric traits, including cell diameter, biovolume, aspect ratio, surface area-to-volume (SA:V) ratio, and nucleus-to-cytoplasm (N:C) ratio. Differences between red (RNS) and green (GNS) morphotypes were assessed using non-parametric statistical analyses, and preserved measurements were corrected to estimate live cell size. A total of 121 cells were analyzed, with RNS overwhelmingly dominating the population. RNS exhibited significantly larger cell diameter and volume than GNS, while SA:V ratios differed significantly between morphotypes, indicating functional differences in size-related morphology. In contrast, aspect ratio did not differ significantly, suggesting overall conservation of cell shape across morphotypes. Estimated live cell sizes indicate that N. scintillans populations in Jakarta Bay are dominated by relatively small cells compared to those reported from temperate regions. Variability in the N:C ratio further suggests heterogeneity in cellular physiological states within the population. Overall, these findings establish a morphometric baseline for N. scintillans in Jakarta Bay and highlight the value of morphometric traits as integrative indicators of physiological variability and environmental forcing in tropical eutrophic coastal systems.
Biodegradation activities of microplastic polymers by Agelas conifera sponge-symbiotic bacteria Meutia Samira Ismet; Endang Sunarwati Srimariana; Nur Alam Dwi Cahyati; Nurlita Putri Anggraini; Lenni Mariana Simbolon; Nadya Cakasana; Mohamad Rafi
Depik Vol 14, No 2 (2025): JUNE 2025
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Research on microplastic (MP) accumulation in marine organisms' tissue have been widely conducted, as well as research on microplastic biodegradation by microbial organisms from the environment.Agelas coniferasponge is proven to accumulate MP in its tissue as well as having bacteria as symbiotic organism. This research aims to screen and study biodegradation activities ofA. coniferasymbiotic bacteria on MP polymers, alsoto identify the species of those bacteria isolates. Bacterial Isolation ofA. coniferasponge tissue was using Zobell 2216E agar media. Screening and biodegradation assay of the bacteria isolates was conducted on Marine Salt Media agar that was added with 0,5 g of MP polymers, using Kroc-Boral method. Diameter of clear (bacterial growth) zone surrounding Kroc-Boral indicated the biodegradation activity of the bacterial isolates. Statistical analysis on the activity was using Two Way ANOVA. Results showed that there were 9 bacterial isolates of 53 that could degrade several MP polymers, with different activities (ANOVA, p value 0.05). High and low-density polymers (Linear- Low Density PolyEthylene/ LLDPE, Polyethylene/PE, and Polyvinyl Chloride/ PVC) were found to be degraded by all 9 isolates. Meanwhile, Polyethylen Taraphtalene (PET) and Polystyrene (PS) only degraded by 8 and 3 isolates, respectively. There are only 5 isolates that have high biodegradation index (1.5) on different polymers, which mostly on PET polymer. Isolate Ac8MP found to be the most bacteria that have degradation index on all polymers more than 1.This research proves that symbiotic bacteria could have a biodegradation mechanism on MP polymers that accumulates by sponge-host. However, further study needs to be done to understand the mechanisms and effectiveness of sponge-bacterial biodegradation activity.