Pub Date : 2023-10-05DOI: 10.14710/jkt.v26i3.20149
Sri Mulyani, Erni Indrawati, Syamsul Bahri
The availability and quality of fry is a major problem in blue swimming crab aquaculture, with the high mortality at the larval stage. RNA/DNA ratio is one of the parameters that can be used to evaluate the quality of crab fry, including health, nutrition, and growth conditions. This study aims to analyze the effect of Phronima sp. as a substitute feed for Artemia salina on the RNA/DNA ratio performance of blue swimming crab in juvenile phase (crablet 5) during rearing before cultivation in aquaculture ponds. This research was conducted at the Crab Hatchery Unit of the Brackish Water Aquaculture Fisheries Center (BPBAP) Takalar in February 2023. The study used a quantitative experimental completely randomized design (CRD) with five treatments and three repetitions. The ratio of Phronima sp. and Artemia sp. used were: Treatment A 100% Phronima sp; Treatment B 100% Artemia sp; Treatment C 75% Phronima sp and 25% Artemia sp; Treatment D 25% Phronima sp and 75% Artemia sp.; and E: Phronima 75%+Artemia salina 25%. The results showed that Artemia salina combined with Phronima sp. increased the RNA/DNA ratio of the crab compared to a single feed (100% Phronima sp. or Artemia salina 100%). The feed combination with the highest RNA/DNA ratio was shown in treatment E (Phronima sp. 25% + Artemia salina 75%) with an RNA/DNA ratio of 2.02 +0.032 ng/µL.
{"title":"RNA/DNA Ratio Performance of Blue Swimming Crab (Portunus pelagicus) Fed with Natural Food Phronima sp. and Artemia salina in Juvenile Phase","authors":"Sri Mulyani, Erni Indrawati, Syamsul Bahri","doi":"10.14710/jkt.v26i3.20149","DOIUrl":"https://doi.org/10.14710/jkt.v26i3.20149","url":null,"abstract":"The availability and quality of fry is a major problem in blue swimming crab aquaculture, with the high mortality at the larval stage. RNA/DNA ratio is one of the parameters that can be used to evaluate the quality of crab fry, including health, nutrition, and growth conditions. This study aims to analyze the effect of Phronima sp. as a substitute feed for Artemia salina on the RNA/DNA ratio performance of blue swimming crab in juvenile phase (crablet 5) during rearing before cultivation in aquaculture ponds. This research was conducted at the Crab Hatchery Unit of the Brackish Water Aquaculture Fisheries Center (BPBAP) Takalar in February 2023. The study used a quantitative experimental completely randomized design (CRD) with five treatments and three repetitions. The ratio of Phronima sp. and Artemia sp. used were: Treatment A 100% Phronima sp; Treatment B 100% Artemia sp; Treatment C 75% Phronima sp and 25% Artemia sp; Treatment D 25% Phronima sp and 75% Artemia sp.; and E: Phronima 75%+Artemia salina 25%. The results showed that Artemia salina combined with Phronima sp. increased the RNA/DNA ratio of the crab compared to a single feed (100% Phronima sp. or Artemia salina 100%). The feed combination with the highest RNA/DNA ratio was shown in treatment E (Phronima sp. 25% + Artemia salina 75%) with an RNA/DNA ratio of 2.02 +0.032 ng/µL.","PeriodicalId":53001,"journal":{"name":"Jurnal Kelautan Tropis","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135547445","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-04DOI: 10.14710/jkt.v26i3.18498
Fawaz Muhammad Sidiqi, Bambang Yulianto, Jusup Suprijanto
Microplastic contamination has been identified in Indonesian water bodies, raising environmental concerns. This study investigates microplastic abundance and characteristics in water and sediment of Palang Waters (Kolam Labuh and Sungai Blangor) in Tuban. Seawater and river samples were collected using a 75 µm mesh plankton net. Microplastics were quantified under microscopy, and polymer analysis utilized Fourier Transform Infrared (FT-IR) spectroscopy. Seawater showed an abundance of 40,000 ± 11,357.82 particles/m3, with 48.75% fragments, 44.58% fibers, and 6.67% granules. River microplastic abundance was 13,333.33 ± 5,033.23 particles/m3, comprising 82.5% fibers, 10% fragments, and 7.5% granules. Sediment's average microplastic abundance was 226.67 ± 83.27 particles/m3, including 53% fibers, 29% fragments, and 18% granules. Statistical analysis highlighted significant differences in microplastic abundance among seawater, river water, and sediment (P-Value = 0.001). Notable differences existed between seawater and river water (P-value = 0.009), and seawater and sediment (P-value 0.001), but not between river water and sediment (P-value = 0.143). Polymer analysis revealed polymers such as Polyvinyl Chloride (PVC), Polyethylene (PE), and High-Density Polyethylene (HDPE). This research offers insights into microplastic presence, aiding in understanding aquatic pollution. Kontaminasi mikroplastik telah terjadi di beberapa perairan Indonesia. Mikroplastik memiliki ukuran ≤5 mm. Penelitian ini bertujuan untuk mengetahui kelimpahan dan karakteristik mikroplastik pada air dan sedimen di Perairan Kolam Labuh dan Sungai Blangor, Kecamatan Palang, Tuban. Sampel air laut dan sungai diambil menggunakan plankton net dengan ukuran mesh 75 µm. Kelimpahan dan bentuk mikroplastik dihitung dan diamati menggunakan mikroskop, dan analisis polimer menggunakan uji Fourier Transform Infrared (FT-IR). Hasil penelitian menunjukkan bahwa kelimpahan mikroplastik pada air laut sebanyak 40.000 ± 11.357,82 partikel/m3, bentuk fragmen sebanyak 48,75 %, kemudian fiber sebanyak 44,58 % dan granules sebanyak 6,67% pada air laut. Sedangkan di Sungai didapatkan kelimpahan mikroplastik sebanyak 13.333,33 ± 5.033,23 partikel/m3, bentuk fiber sebanyak 82,5 %,fragmen 10 % dan fiber 7,5 %. Kelimpahan rata-rata mikroplastik pada sedimen ialah 226,67 ± 83,27 , bentuk fiber sebanyak 53%, fragmen 29% dan granules 18%. Hasil penelitian juga menunjukkan adanya perbedaan kelimpahan mikroplastik pada air laut, sungai dan sedimen (P-Value = 0,001). Perbedaan kelimpahan mikroplastik terjadi antara air laut dengan air sungai (P-value = 0,009) dan antara air laut dengan sedimen (P-value 0,001), sedangkan antara air sungai dan sedimen tidak terjadi perbedaan (P-value = 0,143). Hasil analisis polimer menunjukkan jenis polimer yang ditemukan meliputi Polivinil Klorida (PVC), Polyethylene (PE) dan High-Density Polyethylene (HDPE).
印尼的水体中发现了微塑料污染，引发了人们对环境的担忧。本研究研究了土班帕朗水域(Kolam Labuh和Sungai Blangor)水体和沉积物中的微塑料丰度和特征。采用75µm网状浮游生物网收集海水和河流样本。微塑料在显微镜下定量，聚合物分析利用傅里叶变换红外(FT-IR)光谱。海水丰度为40,000±11,357.82个颗粒/m3，其中碎片占48.75%，纤维占44.58%，颗粒占6.67%。河流微塑料丰度为13333.33±5033.23粒/m3，纤维含量为82.5%，碎片含量为10%，颗粒含量为7.5%。沉积物的平均微塑料丰度为226.67±83.27粒/m3，其中纤维丰度为53%，碎片丰度为29%，颗粒丰度为18%。统计分析显示，海水、河水和沉积物中微塑料丰度存在显著差异(p值= 0.001)。海水与河沙之间存在显著差异(p值= 0.009)，海水与泥沙之间存在显著差异(p值= 0.001)，而河沙之间不存在显著差异(p值= 0.143)。聚合物分析显示了聚氯乙烯(PVC)、聚乙烯(PE)和高密度聚乙烯(HDPE)等聚合物。这项研究提供了对微塑料存在的见解，有助于了解水生污染。Kontaminasi microplastik telah terjadi di beberapa perairan印度尼西亚。微塑膜≤5mm。Penelitian ini bertujuan untuk mengetahui kelimpahan dan karakteristik mikroplastik pada air dan sedimen di Perairan Kolam Labuh dan Sungai Blangor, Kecamatan Palang, Tuban。样品空气取样丹，sungai, diambil, menggunakan浮游生物网登干，ukuran网孔75µm。klimpahan dan bentuk微塑剂dihitung dan diamati menggunakan微塑剂，dan分析聚合物menggunakan uji傅里叶变换红外(FT-IR)。哈西尔penelitian menunjukkan bahwa kelimpahan微塑帕达空气颗粒塞班尼亚克40000±11.357,82颗粒/m3，本图克碎片塞班尼亚克48,75 %，克穆德安纤维塞班尼亚克44,58 %，颗粒塞班尼亚克6,67%，帕达空气颗粒。Sedangkan di Sungai didapatkan kelimpahan微塑质sebanyak 13.333,33±5.033,23颗粒/m3，本图克纤维sebanyak 82.5%，碎片10%丹纤维7,5 %。Kelimpahan rata-rata -rata microplastik pad sedimen ialah 226,67±83,27,bentuk纤维sebanyak 53%，碎片29%，颗粒18%。Hasil penelitian juga menunjukkan adanya perbedaan kelimpahan microplastik pada air laut, sungai dan sedimen (p值= 0.001)。Perbedaan kelimpahan microplastik terjadi antara air laut dengan air sungai (p值= 0,009)dan antara air laut dengan sedimen (p值为0,001)，sedangkan antara air sungai dan sedimen tidak terjadi Perbedaan (p值= 0,143)。Hasil分析聚合物menunjukkan jenis聚合物yang ditemukan meliputi Polivinil Klorida (PVC)，聚乙烯(PE)和高密度聚乙烯(HDPE)。
{"title":"Kelimpahan dan Karakteristik Mikroplastik di Perairan Kolam Llabuh dan Sungai Blangor Kecamatan Palang, Tuban","authors":"Fawaz Muhammad Sidiqi, Bambang Yulianto, Jusup Suprijanto","doi":"10.14710/jkt.v26i3.18498","DOIUrl":"https://doi.org/10.14710/jkt.v26i3.18498","url":null,"abstract":"Microplastic contamination has been identified in Indonesian water bodies, raising environmental concerns. This study investigates microplastic abundance and characteristics in water and sediment of Palang Waters (Kolam Labuh and Sungai Blangor) in Tuban. Seawater and river samples were collected using a 75 µm mesh plankton net. Microplastics were quantified under microscopy, and polymer analysis utilized Fourier Transform Infrared (FT-IR) spectroscopy. Seawater showed an abundance of 40,000 ± 11,357.82 particles/m3, with 48.75% fragments, 44.58% fibers, and 6.67% granules. River microplastic abundance was 13,333.33 ± 5,033.23 particles/m3, comprising 82.5% fibers, 10% fragments, and 7.5% granules. Sediment's average microplastic abundance was 226.67 ± 83.27 particles/m3, including 53% fibers, 29% fragments, and 18% granules. Statistical analysis highlighted significant differences in microplastic abundance among seawater, river water, and sediment (P-Value = 0.001). Notable differences existed between seawater and river water (P-value = 0.009), and seawater and sediment (P-value 0.001), but not between river water and sediment (P-value = 0.143). Polymer analysis revealed polymers such as Polyvinyl Chloride (PVC), Polyethylene (PE), and High-Density Polyethylene (HDPE). This research offers insights into microplastic presence, aiding in understanding aquatic pollution. Kontaminasi mikroplastik telah terjadi di beberapa perairan Indonesia. Mikroplastik memiliki ukuran ≤5 mm. Penelitian ini bertujuan untuk mengetahui kelimpahan dan karakteristik mikroplastik pada air dan sedimen di Perairan Kolam Labuh dan Sungai Blangor, Kecamatan Palang, Tuban. Sampel air laut dan sungai diambil menggunakan plankton net dengan ukuran mesh 75 µm. Kelimpahan dan bentuk mikroplastik dihitung dan diamati menggunakan mikroskop, dan analisis polimer menggunakan uji Fourier Transform Infrared (FT-IR). Hasil penelitian menunjukkan bahwa kelimpahan mikroplastik pada air laut sebanyak 40.000 ± 11.357,82 partikel/m3, bentuk fragmen sebanyak 48,75 %, kemudian fiber sebanyak 44,58 % dan granules sebanyak 6,67% pada air laut. Sedangkan di Sungai didapatkan kelimpahan mikroplastik sebanyak 13.333,33 ± 5.033,23 partikel/m3, bentuk fiber sebanyak 82,5 %,fragmen 10 % dan fiber 7,5 %. Kelimpahan rata-rata mikroplastik pada sedimen ialah 226,67 ± 83,27 , bentuk fiber sebanyak 53%, fragmen 29% dan granules 18%. Hasil penelitian juga menunjukkan adanya perbedaan kelimpahan mikroplastik pada air laut, sungai dan sedimen (P-Value = 0,001). Perbedaan kelimpahan mikroplastik terjadi antara air laut dengan air sungai (P-value = 0,009) dan antara air laut dengan sedimen (P-value 0,001), sedangkan antara air sungai dan sedimen tidak terjadi perbedaan (P-value = 0,143). Hasil analisis polimer menunjukkan jenis polimer yang ditemukan meliputi Polivinil Klorida (PVC), Polyethylene (PE) dan High-Density Polyethylene (HDPE).","PeriodicalId":53001,"journal":{"name":"Jurnal Kelautan Tropis","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135647420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-05DOI: 10.14710/jkt.v26i3.19779
Syauqina Nashihi Aufar, Agus Sabdono, Diah Permata Wijayanti, M. Munasik
Degradation of marine waters in Panjang Island is increasing resulting in high production of benthic periphyton. Procurement of hard substrate as material for artificial reefs is one of the efforts to see the succession pattern of benthic periphyton microscopically. The purpose of this study was to determine the differences in the abundance and composition of diatoms in geopolymer concrete and ordinary concrete substrates. The method used is the field experimental method, immersing different concrete substrates, namely geopolymer concrete (BA) and ordinary concrete (BT) in the sea waters of Panjang Island at a depth of 3 m for 2 months. Periphyton growth on the substrate was observed microscopically using the Scanning Electronic Microscope (SEM) method. Observations were made at immersion time of 1 day (T1), 7 days (T2), 14 days (T3), 28 days (T4), and 56 days (T5). The results showed that there were differences in the development of Periphyton Diatoms between geopolymer (BA) and ordinary concrete (BT) substrates. On both substrates, periphyton growth was found starting from the observation of soaking for 1 day. The density and diversity of periphyton on the BA substrate was higher than that of the BT substrate, with a density of 2535 cell cm-2 and 73 cell cm-2, respectively, and the diversity of H'Shanon Wiener was 4.07 and 0.33. The benefit of this research is to determine the initial succession of biofilm formation on artificial substrates as a building material for artificial reefs for coral reef restoration programs, especially in marginal reef conditions. Degradasi perairan laut di Pulau Panjang semakin meningkat mengakibatkan produksi perifiton bentik yang tinggi. Pengadaan substrat keras sebagai bahan terumbu buatan menjadi salah satu upaya untuk melihat pola suksesi perifiton bentik secara mikroskopis. Tujuan dilakukannya penelitian ini untuk mengetahui perbedaan kelimpahan dan komposisi diatom pada substrat beton geopolimer dan beton biasa. Metode yang digunakan yaitu metode eksperimental lapangan, dilakukan perendaman substrat beton yang berbeda yaitu beton geopolymer (BA) dan beton biasa (BT) di perairan laut pulau Panjangdi pada kedalaman 3 m selama 2 bulan. Pertumbuhan perifiton pada substrat diamati secara mikroskopis menggunakan metode Scanning Electronic Microscope (SEM). Pengamatan dilakukan pada lama perendaman 1 hari (T1), 7hari (T2), 14 hari (T3), 28 hari (T4), dan 56 hari (T5). Hasil penelitian menunjukkan ada perbedaan Perkembangan Diatom Perifiton antara substrat geopolymer (BA) dan beton biasa (BT). Pada ke dua substrat dijumpai pertumbuhan perifiton mulai pengamatan perendaman selama 1 hari. Densitas dan keragaman perifiton pada substrat BA lebih tinggi daripada substrat BT yaitu masing-masing dengan densitas 2535 sel cm-2 dan 73 sel cm-2, dan keragaman H’Shanon Wiener sebesar 4,07 dan 0,33. Manfaat dari penelitian ini adalah untuk mengetahui suksesi awal pembentukan biofilm pada substrat buatan sebagai bahan penyusu
潘章岛海水的退化日益加剧，导致底栖栖生物大量繁殖。采购硬基质作为人工鱼礁的材料，是在显微镜下观察底栖生物演替模式的努力之一。本研究的目的是确定土工聚合物混凝土和普通混凝土底质中硅藻数量和组成的差异。采用的方法是现场实验法，将不同的混凝土基质，即土工聚合物混凝土（BA）和普通混凝土（BT），浸泡在潘庄岛 3 米深的海水中 2 个月。使用扫描电子显微镜（SEM）方法在显微镜下观察浮游植物在基质上的生长情况。观察时间分别为 1 天（T1）、7 天（T2）、14 天（T3）、28 天（T4）和 56 天（T5）。结果表明，土工聚合物（BA）和普通混凝土（BT）基质在硅藻的发育方面存在差异。在这两种基质上，从浸泡 1 天开始就发现有浮游生物生长。BA 底质上的浮游生物密度和多样性均高于 BT 底质，密度分别为 2535 cells cm-2 和 73 cell cm-2，H'Shanon Wiener 的多样性分别为 4.07 和 0.33。这项研究的益处在于确定人工基质上生物膜形成的初始演替，作为珊瑚礁修复计划中人工珊瑚礁的建筑材料，尤其是在边缘珊瑚礁条件下。 在Pulau Panjang岛进行的珊瑚礁退化研究（Degradasi perairan laut di Pulau Panjang semakin meningkat mengakibatkan produksi perifiton bentik yang tinggi）。基质材料作为一种可持续发展的材料，可提供最有效的解决方案，用于在水稻田中生产高产优质的水稻。 本研究的目的是在地球藻和偏球藻基质上获得硅藻的分布和组成。实验方法是一种实验圈测法，在 Panjangdi 岛上的 2 个大年初一至初三的海拔 3 米范围内，对地聚合物饵料（BA）和生物饵料（BT）的饵料基质进行研究。用扫描电子显微镜（SEM）测量基底的厚度。 检测时间分别为 1 天（T1）、7 天（T2）、14 天（T3）、28 天（T4）和 56 天（T5）。在土工聚合物基质（BA）和生物质基质（BT）上都有硅藻栖息地。对每种基质的硅藻围岩在 1 个月内都能达到一定的密度。BA基质的密度和粒径与BT基质相当，密度分别为2535 sel cm-2 和73 sel cm-2，粒径分别为4.07和0.33。这表明，生物膜在基质中的生长速度是水生植物生长的基础，是水生植物边际生境修复计划的基础。
{"title":"Perkembangan Diatom Perifiton Pada Substrat Buatan di Perairan Pulau Panjang, Jepara","authors":"Syauqina Nashihi Aufar, Agus Sabdono, Diah Permata Wijayanti, M. Munasik","doi":"10.14710/jkt.v26i3.19779","DOIUrl":"https://doi.org/10.14710/jkt.v26i3.19779","url":null,"abstract":"Degradation of marine waters in Panjang Island is increasing resulting in high production of benthic periphyton. Procurement of hard substrate as material for artificial reefs is one of the efforts to see the succession pattern of benthic periphyton microscopically. The purpose of this study was to determine the differences in the abundance and composition of diatoms in geopolymer concrete and ordinary concrete substrates. The method used is the field experimental method, immersing different concrete substrates, namely geopolymer concrete (BA) and ordinary concrete (BT) in the sea waters of Panjang Island at a depth of 3 m for 2 months. Periphyton growth on the substrate was observed microscopically using the Scanning Electronic Microscope (SEM) method. Observations were made at immersion time of 1 day (T1), 7 days (T2), 14 days (T3), 28 days (T4), and 56 days (T5). The results showed that there were differences in the development of Periphyton Diatoms between geopolymer (BA) and ordinary concrete (BT) substrates. On both substrates, periphyton growth was found starting from the observation of soaking for 1 day. The density and diversity of periphyton on the BA substrate was higher than that of the BT substrate, with a density of 2535 cell cm-2 and 73 cell cm-2, respectively, and the diversity of H'Shanon Wiener was 4.07 and 0.33. The benefit of this research is to determine the initial succession of biofilm formation on artificial substrates as a building material for artificial reefs for coral reef restoration programs, especially in marginal reef conditions. Degradasi perairan laut di Pulau Panjang semakin meningkat mengakibatkan produksi perifiton bentik yang tinggi. Pengadaan substrat keras sebagai bahan terumbu buatan menjadi salah satu upaya untuk melihat pola suksesi perifiton bentik secara mikroskopis. Tujuan dilakukannya penelitian ini untuk mengetahui perbedaan kelimpahan dan komposisi diatom pada substrat beton geopolimer dan beton biasa. Metode yang digunakan yaitu metode eksperimental lapangan, dilakukan perendaman substrat beton yang berbeda yaitu beton geopolymer (BA) dan beton biasa (BT) di perairan laut pulau Panjangdi pada kedalaman 3 m selama 2 bulan. Pertumbuhan perifiton pada substrat diamati secara mikroskopis menggunakan metode Scanning Electronic Microscope (SEM). Pengamatan dilakukan pada lama perendaman 1 hari (T1), 7hari (T2), 14 hari (T3), 28 hari (T4), dan 56 hari (T5). Hasil penelitian menunjukkan ada perbedaan Perkembangan Diatom Perifiton antara substrat geopolymer (BA) dan beton biasa (BT). Pada ke dua substrat dijumpai pertumbuhan perifiton mulai pengamatan perendaman selama 1 hari. Densitas dan keragaman perifiton pada substrat BA lebih tinggi daripada substrat BT yaitu masing-masing dengan densitas 2535 sel cm-2 dan 73 sel cm-2, dan keragaman H’Shanon Wiener sebesar 4,07 dan 0,33. Manfaat dari penelitian ini adalah untuk mengetahui suksesi awal pembentukan biofilm pada substrat buatan sebagai bahan penyusu","PeriodicalId":53001,"journal":{"name":"Jurnal Kelautan Tropis","volume":"44 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139342593","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-18DOI: 10.14710/jkt.v26i3.18326
Diah Alviana, Rika Anggraini, Jelita Rahma Hidayati, Ita Karlina, Febrianti Lestari, Dony Apdillah, Agung Dhamar Syakti, Dermawati Sihite
Mangrove have a role in the absorption and storage of carbon from the atmosphere, which is stored in the form of biomass and sediment, so that mangroves have enormous potential in mitigation global climate change because they can reduce greenhouse gas emission is carbon. Mangrove store carbon in carbon pools including above ground biomass, below ground biomass, litter or dead wood, and soil. The purpose of this study was to calculate the value of carbon stock and carbon sequestration in mangroves in Pengudang Villages, Teluk Sebong District, Bintan Regency. This research was conducted in September – October 2022, the research method used purposive sampling non-destructive method with allometric model and sediment sampling was carried out at 30 cm intervals until the discovery of humus soil. The result of biomass calculations were then converted into carbon stock values and mangrove carbon sequestration. Data analysis was carried out by calculating biomass, carbon stock value and carbon sequestration in mangroves in Pengudang Villages, Teluk Sebong District, Bintan Regency. The result showed the total biomass value was 498,77 tons/ha, the carbon stock value was 1203,27 tonsC/ha, while the carbon sequestration value was 4412,05 tonsC/ha. Mangrove berperan dalam penyerapan dan penyimpanan karbon dari atmosfer yang disimpan dalam bentuk biomassa dan sedimen, sehingga mangrove memiliki potensi yang sangat besar dalam mitigasi perubahan iklim global karena dapat mengurangi emisi gas rumah kaca yaitu karbon. Mangrove menyimpan karbon dalam kantong karbon diantaranya adalah biomassa bagian atas, biomassa bagian bawah, serasah atau kayu mati dan tanah. Tujuan penelitian ini untuk menghitung nilai stok karbon dan sekuestrasi karbon pada mangrove di Desa Pengudang Kecamatan Teluk Sebong Kabupaten Bintan. Penelitian ini dilakukan pada bulan September – Oktober tahun 2022, metode penelitian yang digunakan adalah purposive sampling metode non-destruktif dengan model alometrik dan dilakukan pengambilan sampel sedimen per-interval 30cm hingga ditemukannya tanah humus. Hasil perhitungan biomassa kemudian dilakukan konversi nilai stok karbon dan sekuestrasi karbon mangrove. Analisis data dilakukan dengan menghitung biomassa, nilai stok karbon dan sekuestrasi karbon pada mangrove di Desa Pengudang Kecamatan Teluk Sebong Kabupaten Bintan. Hasil penelitian menunjukkan nilai total biomassa 498,77 ton/ha nilai stok karbon adalah 1203,27 tonC/ha sedangkan nilai sekuestrasi karbon adalah 4412,05 tonC/ha.
{"title":"Estimasi Cadangan Karbon Pada Ekosistem Mangrove Di Desa Pengudang Kecamatan Teluk Sebong Kabupaten Bintan","authors":"Diah Alviana, Rika Anggraini, Jelita Rahma Hidayati, Ita Karlina, Febrianti Lestari, Dony Apdillah, Agung Dhamar Syakti, Dermawati Sihite","doi":"10.14710/jkt.v26i3.18326","DOIUrl":"https://doi.org/10.14710/jkt.v26i3.18326","url":null,"abstract":"Mangrove have a role in the absorption and storage of carbon from the atmosphere, which is stored in the form of biomass and sediment, so that mangroves have enormous potential in mitigation global climate change because they can reduce greenhouse gas emission is carbon. Mangrove store carbon in carbon pools including above ground biomass, below ground biomass, litter or dead wood, and soil. The purpose of this study was to calculate the value of carbon stock and carbon sequestration in mangroves in Pengudang Villages, Teluk Sebong District, Bintan Regency. This research was conducted in September – October 2022, the research method used purposive sampling non-destructive method with allometric model and sediment sampling was carried out at 30 cm intervals until the discovery of humus soil. The result of biomass calculations were then converted into carbon stock values and mangrove carbon sequestration. Data analysis was carried out by calculating biomass, carbon stock value and carbon sequestration in mangroves in Pengudang Villages, Teluk Sebong District, Bintan Regency. The result showed the total biomass value was 498,77 tons/ha, the carbon stock value was 1203,27 tonsC/ha, while the carbon sequestration value was 4412,05 tonsC/ha. Mangrove berperan dalam penyerapan dan penyimpanan karbon dari atmosfer yang disimpan dalam bentuk biomassa dan sedimen, sehingga mangrove memiliki potensi yang sangat besar dalam mitigasi perubahan iklim global karena dapat mengurangi emisi gas rumah kaca yaitu karbon. Mangrove menyimpan karbon dalam kantong karbon diantaranya adalah biomassa bagian atas, biomassa bagian bawah, serasah atau kayu mati dan tanah. Tujuan penelitian ini untuk menghitung nilai stok karbon dan sekuestrasi karbon pada mangrove di Desa Pengudang Kecamatan Teluk Sebong Kabupaten Bintan. Penelitian ini dilakukan pada bulan September – Oktober tahun 2022, metode penelitian yang digunakan adalah purposive sampling metode non-destruktif dengan model alometrik dan dilakukan pengambilan sampel sedimen per-interval 30cm hingga ditemukannya tanah humus. Hasil perhitungan biomassa kemudian dilakukan konversi nilai stok karbon dan sekuestrasi karbon mangrove. Analisis data dilakukan dengan menghitung biomassa, nilai stok karbon dan sekuestrasi karbon pada mangrove di Desa Pengudang Kecamatan Teluk Sebong Kabupaten Bintan. Hasil penelitian menunjukkan nilai total biomassa 498,77 ton/ha nilai stok karbon adalah 1203,27 tonC/ha sedangkan nilai sekuestrasi karbon adalah 4412,05 tonC/ha.","PeriodicalId":53001,"journal":{"name":"Jurnal Kelautan Tropis","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139358336","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-18DOI: 10.14710/jkt.v26i3.18421
Teddy Triandiza, U. E. Hernawan, Agus Kusnadi
The giant clams are the biggest living bivalves that not only play a vital role in coral reef ecosystem, but also as a food provider for coastal inhabitant. One of these species was Tridacna noae which is a crpyctic species due to morphoplogial characteristic similarity and habitat preferences with Tridacna maxima. Tridacna noae was recorded at the first time found in Kei Islands on November and December 2017 based on morphological characteristic and DNA barcoding analysis. This research found 8 individu of T. Noae in total, 7 individu was found in Kur Island and one individu from Ohoidertom at 2-3 m depth. The mantle pattern of T. noae was very unique and can be used to distinguished from T. maxima. Special feature of ormanent mantle of T. noae indicated with oval-shape patch with white line on the edge, has hyaline organ scattered along the margin of mantle and the presence of papillae that clearly seen. The result on Blasting from GenBank NCBI for COI sequence of giant clam sample revealed that 99.79%-100% was identical with T. noae species. Furthermore, result on genetic distance analysis of T. noae sample from Kei Island compare with T.noae from GenBank was 0.00-0.051, while genetic distance value compare with T. maxima was 0.159 – 0.205. The new finding of T. noae in Kei Island has added the number of giant clam species recorded previously become 7 species. This finding was also has enhanced the information on biogeographical distribution of T.noae in Indonesia. Kerang kima merupakan kelompok bivalvia berukuran paling besar yang memlilki peranan penting di ekosistem terumbu karang serta menjadi sumber nutrisi bagi masyarakat peisir. Salah satu species kima adalah Tridacna noae yang bersifat cryptic spesies karena memiliki banyak kesamaan karakteristik morfologi dan preferensi habitat dengan T. Maxima. T. noae tercatat pertama kali ditemukan di Perairan Kepulauan Kei pada bulan November dan Desember 2017 berdasarkan pengamatan karekteristik morfologi dan aplikasi DNA barcoding. Hasil peneltian menemukan delapan individu T. noae, tujuh individu ditemukan di Perairan Pulau Kur, satu individu ditemukan di Perairan Ohoidertoom dengan kedalaman perairan 2-3 m. Ornamen mantel T. noae sangat khas dan dapat digunakan untuk membedakan dari T. maxima. Ornamen mantel ditandai dengan patch berbentuk oval terpisah dengan garis putih di tepi, memiliki organ hialin yang tersebar di sepanjang margin mantel, dan kehadiran papila yang terlihat jelas. Hasil blasting di GenBank NCBI untuk sekuens COI sampel kima menghasilkan tingkat kemiripan 99.79%-100% (identik) dengan T. noae. Hasil analisis jarak genetik sampel T. noae asal Kepulauan Kei dengan T. noae Genbank adalah sebesar 0.00 hingga 0.051, sedangkan jarak genetik dengan T. maxima adalah 0.159 hingga 0.205. Temuan T. noae di Kepulauan Kei menambahkan jenis kima yang tercatat sebelumnya di Kepulauan Kei menjadi 7 jenis. Temuan ini juga menambahkan lebih banyak informasi tentang distribusi geografis T.
砗磲是最大的双壳类生物，不仅在珊瑚礁生态系统中发挥着重要作用，还是沿海居民的食物提供者。砗磲（Tridacna noae）是其中的一个物种，由于其形态特征与 Tridacna maxima 相似，且栖息地偏好 Tridacna maxima，因此是一个脆性物种。根据形态特征和DNA条形码分析，2017年11月和12月在京族群岛首次发现了Tridacna noae。本次研究共发现8个砗磲个体，其中7个个体发现于库尔岛，1个个体发现于2-3米深处的Ohoidertom。T. noae 的套膜图案非常独特，可以用来与 T. maxima 区分开来。T. noae 的套膜特征是边缘有白线的椭圆形斑块，套膜边缘散布着透明器官，乳头清晰可见。从 GenBank NCBI 对砗磲样本 COI 序列的 Blasting 结果显示，99.79%-100% 与 T. noae 相同。此外，京岛砗磲样本与 GenBank 中砗磲样本的遗传距离分析结果为 0.00-0.051，而与 T. maxima 的遗传距离值为 0.159 - 0.205。在京岛新发现的 T. noae 使以前记录的砗磲种类增加到 7 种。这一发现也增加了印尼砗磲生物地理分布的信息。 蛤蜊是最大的双壳类动物，在珊瑚礁生态系统中发挥着重要作用，也是沿海社区的营养来源。Tridacna noae 是蛤蜊中的一个物种，它是一个隐蔽物种，因为它与 T. Maxima 有许多共同的形态特征和栖息地偏好。根据形态特征观察和 DNA 条形码应用，2017 年 11 月和 12 月在京群岛海域首次记录到 T. noae。研究结果发现了8个T. noae个体，其中7个个体发现于库尔岛水域，1个个体发现于水深2-3米的Ohoidertoom水域。T. noae 的甲壳装饰非常独特，可以用来与 T. maxima 区分开来。套膜纹饰的特点是有独立的椭圆形斑块，边缘有白线，透明器官散布在套膜边缘，乳头清晰可见。在基因库（GenBank NCBI）中对蛤蜊样本的 COI 序列进行爆破分析的结果显示，其与 T. noae 的相似度为 99.79%-100%（相同）。 京群岛的 T. noae 样本与 T. noae 基因库的遗传距离分析结果为 0.00 至 0.051，而与 T. maxima 的遗传距离为 0.159 至 0.205。在京氏群岛发现的 T. noae 使以前在京氏群岛记录的蛤类物种增加到 7 种。这也为 T. noae 在印度尼西亚的地理分布提供了更多信息。
{"title":"Catatan Pertama Distribusi Tridacna noae (Röding, 1798) dari Perairan Kepulauan Kei, Maluku","authors":"Teddy Triandiza, U. E. Hernawan, Agus Kusnadi","doi":"10.14710/jkt.v26i3.18421","DOIUrl":"https://doi.org/10.14710/jkt.v26i3.18421","url":null,"abstract":"The giant clams are the biggest living bivalves that not only play a vital role in coral reef ecosystem, but also as a food provider for coastal inhabitant. One of these species was Tridacna noae which is a crpyctic species due to morphoplogial characteristic similarity and habitat preferences with Tridacna maxima. Tridacna noae was recorded at the first time found in Kei Islands on November and December 2017 based on morphological characteristic and DNA barcoding analysis. This research found 8 individu of T. Noae in total, 7 individu was found in Kur Island and one individu from Ohoidertom at 2-3 m depth. The mantle pattern of T. noae was very unique and can be used to distinguished from T. maxima. Special feature of ormanent mantle of T. noae indicated with oval-shape patch with white line on the edge, has hyaline organ scattered along the margin of mantle and the presence of papillae that clearly seen. The result on Blasting from GenBank NCBI for COI sequence of giant clam sample revealed that 99.79%-100% was identical with T. noae species. Furthermore, result on genetic distance analysis of T. noae sample from Kei Island compare with T.noae from GenBank was 0.00-0.051, while genetic distance value compare with T. maxima was 0.159 – 0.205. The new finding of T. noae in Kei Island has added the number of giant clam species recorded previously become 7 species. This finding was also has enhanced the information on biogeographical distribution of T.noae in Indonesia. Kerang kima merupakan kelompok bivalvia berukuran paling besar yang memlilki peranan penting di ekosistem terumbu karang serta menjadi sumber nutrisi bagi masyarakat peisir. Salah satu species kima adalah Tridacna noae yang bersifat cryptic spesies karena memiliki banyak kesamaan karakteristik morfologi dan preferensi habitat dengan T. Maxima. T. noae tercatat pertama kali ditemukan di Perairan Kepulauan Kei pada bulan November dan Desember 2017 berdasarkan pengamatan karekteristik morfologi dan aplikasi DNA barcoding. Hasil peneltian menemukan delapan individu T. noae, tujuh individu ditemukan di Perairan Pulau Kur, satu individu ditemukan di Perairan Ohoidertoom dengan kedalaman perairan 2-3 m. Ornamen mantel T. noae sangat khas dan dapat digunakan untuk membedakan dari T. maxima. Ornamen mantel ditandai dengan patch berbentuk oval terpisah dengan garis putih di tepi, memiliki organ hialin yang tersebar di sepanjang margin mantel, dan kehadiran papila yang terlihat jelas. Hasil blasting di GenBank NCBI untuk sekuens COI sampel kima menghasilkan tingkat kemiripan 99.79%-100% (identik) dengan T. noae. Hasil analisis jarak genetik sampel T. noae asal Kepulauan Kei dengan T. noae Genbank adalah sebesar 0.00 hingga 0.051, sedangkan jarak genetik dengan T. maxima adalah 0.159 hingga 0.205. Temuan T. noae di Kepulauan Kei menambahkan jenis kima yang tercatat sebelumnya di Kepulauan Kei menjadi 7 jenis. Temuan ini juga menambahkan lebih banyak informasi tentang distribusi geografis T. ","PeriodicalId":53001,"journal":{"name":"Jurnal Kelautan Tropis","volume":"58 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139358250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-06DOI: 10.14710/jkt.v26i3.15987
S. Syahrial, C. 'Akla, Riri Ezraneti, Repki Prasetyo, Shela Annisa Batubara, Muhammad Afif Tri Putra, Jasmine Wiyanda Fadillah, Reslina Tumangger, Helda Diah Ananda
The purposes of the reasearch that was conducted on July 2022 are to determine the biodiversity, composition, density, community index, correlation and contribution of gastropods on 18 year post tsunami and 16 year coastal rehabilitation in research observation of Banda Aceh. The method used is purposive sampling with 4 observation stations. Gastropods were collected using a quadratic transect perpendicular to the shoreline. PCA analysis was carried out to determine the level of contribution of gastropod species based on observation stations, while SIMPER and CA analyzes were carried out to compare and classify gastropod communities. A total of 8 families, 8 genera, 10 species and 6945 ind gastropods were found with densities ranging from 37.55 – 136.60 ind/m2. The highest diversity index was found at Station II (0.63), the highest uniformity index was found at Station III (0.86) and the highest dominance index was found at Station I (0.99). Gastropods Nerita planospira, Cassidula aurisfelis, C. nucleus, Sphaerassiminea miniata and Oncidium sp. closely related to Rhizophora mucronata and Avicennia alba growing on muddy substrates, while Morula iostoma, Cerithidea cingulata, Littoraria melanostoma, Nassarius olivaceus and L. scabra were closely related to R. mucronata growing on sandy mud substrates. Furthermore, C. cingulata species contributed at Stations I and IV, while C. aurisfelis species contributed at Stations II and III. Kajian dilakukan pada bulan Juli 2022 yang bertujuan untuk mengetahui biodiversitas, komposisi, kepadatan, indeks komunitas serta keterkaitan dan kontribusi gastropoda terhadap stasiun pengamatan pasca 18 tahun tsunami dan 16 tahun rehabilitasi pantai di Kota Banda Aceh. Metode yang digunakan adalah purposive sampling dengan 4 stasiun pengamatan. Gastropoda dikumpulkan menggunakan transek kuadrat yang tegak lurus garis pantai. Analisis PCA dilakukan untuk mengetahui tingkat kontribusi spesies gastropoda berdasarkan stasiun pengamatan, sedangkan analisis SIMPER dan CA dilakukan untuk membandingkan serta mengklasifikasikan komunitas gastropodanya. Sebanyak 8 famili, 8 genus, 10 spesies dan 6945 ind gastropoda ditemukan dengan komposisi gastropoda antar stasiun pengamatannya berbeda nyata (p = 0.000) serta kepadatan gastropodanya berkisar antara 37.55 – 136.60 ind/m2. Indeks keanekaragaman tertinggi ditemukan pada Stasiun II (0.63), indeks keseragaman tertinggi ditemukan pada Stasiun III (0.86) dan indeks dominasi tertinggi ditemukan pada Stasiun I (0.99). Gastropoda Nerita planospira, Cassidula aurisfelis, C. nucleus, Sphaerassiminea miniata dan Oncidium sp. berkaitan erat dengan Stasiun II dan III (substratnya berlumpur), sedangkan Morula iostoma, Cerithidea cingulata, Littoraria melanostoma, Nassarius olivaceus dan L. scabra berkaitan erat dengan Stasiun I dan IV (substratnya lumpur berpasir). Selanjutnya, spesies C. cingulata memiliki kontribusi di Stasiun I maupun IV, sedangkan spesies C. aurisfelis memiliki kontribusi
这项研究于 2022 年 7 月进行，目的是确定班达亚齐研究观测站海啸后 18 年和海岸恢复后 16 年腹足类动物的生物多样性、组成、密度、群落指数、相关性和贡献。采用的方法是在 4 个观察站进行有目的的抽样。采用垂直于海岸线的四边形横断面采集腹足类动物。进行了 PCA 分析，以确定腹足类物种对各观察站的贡献程度，同时进行了 SIMPER 和 CA 分析，以比较和划分腹足类群落。共发现 8 科、8 属、10 种和 6945 个腹足类，密度范围为 37.55 - 136.60 个/平方米。第 II 站的多样性指数最高（0.63），第 III 站的均匀度指数最高（0.86），第 I 站的优势度指数最高（0.99）。腹足类 Nerita planospira、Cassidula aurisfelis、C. nucleus、Sphaerassiminea miniata 和 Oncidium sp.与生长在泥质底质上的 Rizophora mucronata 和 Avicennia alba 亲缘关系密切，而 Morula iostoma、Cerithidea cingulata、Littoraria melanostoma、Nassarius olivaceus 和 L. scabra 与生长在砂质泥质底质上的 R. mucronata 亲缘关系密切。此外，C. cingulata物种在I站和IV站有贡献，而C. aurisfelis物种在II站和III站有贡献。 该研究于 2022 年 7 月发布，旨在了解班达亚齐省 18 年海啸和 16 年恢复期间的生物多样性、组成、分布、生物群落指数以及腹足纲动物的分布情况。采样方法是有目的的采样，包括 4 个采样点。采集的腹足类动物可作为泛太平洋地区的濒危物种。PCA 分析法可用于确定腹足类在不同种群中的分布情况，而 SIMPER 和 CA 分析法可用于确定和分析腹足类群体。从 8 科、8 属、10 种和 6945 个腹足类动物群落来看，腹足类动物群落的分布情况与雌性腹足类动物群落的分布情况（P = 0.000）相差 37.55 - 136.60 个/平方米。第二阶段的平均指数为 0.63，第三阶段的平均指数为 0.86，而第一阶段的平均指数为 0.99。腹足类 Nerita planospira、Cassidula aurisfelis、C. nucleus、Sphaerassiminea miniata 和 Oncidium sp.在第 II 和第 III 阶段（基质较硬）均有分布，而在第 I 和第 IV 阶段（基质较硬）则有 Morula iostoma、Cerithidea cingulata、Littoraria melanostoma、Nassarius olivaceus 和 L. scabra 的分布。此外，C. cingulata孢子虫在 Stasiun I 和 IV 中都有分布，而 C. aurisfelis孢子虫在 Stasiun II 和 III 中都有分布。
{"title":"Keberadaan Gastropoda Mangrove Pasca 18 Tahun Tsunami dan 16 Tahun Rehabilitasi Pantai di Kota Banda Aceh","authors":"S. Syahrial, C. 'Akla, Riri Ezraneti, Repki Prasetyo, Shela Annisa Batubara, Muhammad Afif Tri Putra, Jasmine Wiyanda Fadillah, Reslina Tumangger, Helda Diah Ananda","doi":"10.14710/jkt.v26i3.15987","DOIUrl":"https://doi.org/10.14710/jkt.v26i3.15987","url":null,"abstract":"The purposes of the reasearch that was conducted on July 2022 are to determine the biodiversity, composition, density, community index, correlation and contribution of gastropods on 18 year post tsunami and 16 year coastal rehabilitation in research observation of Banda Aceh. The method used is purposive sampling with 4 observation stations. Gastropods were collected using a quadratic transect perpendicular to the shoreline. PCA analysis was carried out to determine the level of contribution of gastropod species based on observation stations, while SIMPER and CA analyzes were carried out to compare and classify gastropod communities. A total of 8 families, 8 genera, 10 species and 6945 ind gastropods were found with densities ranging from 37.55 – 136.60 ind/m2. The highest diversity index was found at Station II (0.63), the highest uniformity index was found at Station III (0.86) and the highest dominance index was found at Station I (0.99). Gastropods Nerita planospira, Cassidula aurisfelis, C. nucleus, Sphaerassiminea miniata and Oncidium sp. closely related to Rhizophora mucronata and Avicennia alba growing on muddy substrates, while Morula iostoma, Cerithidea cingulata, Littoraria melanostoma, Nassarius olivaceus and L. scabra were closely related to R. mucronata growing on sandy mud substrates. Furthermore, C. cingulata species contributed at Stations I and IV, while C. aurisfelis species contributed at Stations II and III. Kajian dilakukan pada bulan Juli 2022 yang bertujuan untuk mengetahui biodiversitas, komposisi, kepadatan, indeks komunitas serta keterkaitan dan kontribusi gastropoda terhadap stasiun pengamatan pasca 18 tahun tsunami dan 16 tahun rehabilitasi pantai di Kota Banda Aceh. Metode yang digunakan adalah purposive sampling dengan 4 stasiun pengamatan. Gastropoda dikumpulkan menggunakan transek kuadrat yang tegak lurus garis pantai. Analisis PCA dilakukan untuk mengetahui tingkat kontribusi spesies gastropoda berdasarkan stasiun pengamatan, sedangkan analisis SIMPER dan CA dilakukan untuk membandingkan serta mengklasifikasikan komunitas gastropodanya. Sebanyak 8 famili, 8 genus, 10 spesies dan 6945 ind gastropoda ditemukan dengan komposisi gastropoda antar stasiun pengamatannya berbeda nyata (p = 0.000) serta kepadatan gastropodanya berkisar antara 37.55 – 136.60 ind/m2. Indeks keanekaragaman tertinggi ditemukan pada Stasiun II (0.63), indeks keseragaman tertinggi ditemukan pada Stasiun III (0.86) dan indeks dominasi tertinggi ditemukan pada Stasiun I (0.99). Gastropoda Nerita planospira, Cassidula aurisfelis, C. nucleus, Sphaerassiminea miniata dan Oncidium sp. berkaitan erat dengan Stasiun II dan III (substratnya berlumpur), sedangkan Morula iostoma, Cerithidea cingulata, Littoraria melanostoma, Nassarius olivaceus dan L. scabra berkaitan erat dengan Stasiun I dan IV (substratnya lumpur berpasir). Selanjutnya, spesies C. cingulata memiliki kontribusi di Stasiun I maupun IV, sedangkan spesies C. aurisfelis memiliki kontribusi","PeriodicalId":53001,"journal":{"name":"Jurnal Kelautan Tropis","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139362368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-27DOI: 10.14710/jkt.v26i3.18222
Alfandy Putra Anugrah, Zainul Hidayah, Abdurrahman As-Syakur, Herlambang Aulia Rachman
The Java Sea is an area with the highest rate of exploitation of fishery resources in Indonesia. As much as 32% of the total national fishery production or 2.2 million tons has come from catches in the Java Sea, even though the area of these waters only covers 7% of the total area of national waters. Fisheries productivity is related to the net primary productivity value resulting from the activity of phytoplankton or chlorophyll-a. Net primary productivity (NPP) is influenced by the presence of nutrients, light, chlorophyll-a, Photosynthetically Available Radiation (PAR) and sea surface temperature (SST). The purpose of this research is to analyze the distribution value of net primary productivity in the Java Sea by utilizing Aqua-MODIS satellite imagery using the Vertically Generalized Production Model (VGPM) method with a range of 2017-2021. The results showed that the waters of the Java Sea have quite high fertility and are classified as Eutrophic because the general monthly average from 2017-2021 has an NPP value of >750 mgC/m2/day. The value of primary productivity follows the seasonal pattern, will be high in the east moonson season and decrease in the west monsoon season. Laut Jawa merupakan wilayah dengan laju eksploitasi sumberdaya perikanan tertinggi di Indonesia. Sebanyak 32% dari total produksi perikanan nasional atau sebesar 2,2 juta ton berasal dari hasil tangkapan di Laut Jawa meskipun luas wilayah perairan ini hanya mencakup 7% dari total luas wilayah perairan nasional. Produktivitas perikanan tangkap berhubungan dengan nilai produktivitas primer bersih hasil dari aktivitas fitoplankton atau klorofil-a. Produktivitas primer bersih di suatu perairan dipengaruhi oleh adanya unsur hara, cahaya, klorofil-a, Photosynthetically Available Radiation (PAR) dan suhu permukaan laut (SPL). Tujuan dari penelitian ini adalah untuk menganalisis nilai distribusi produktivitas primer bersih di Laut Jawa dengan memanfaatkan citra satelit Aqua-MODIS menggunakan metode Vertically Generalized Production Model (VGPM) dengan rentang tahun 2017-2021. Hasil penelitian menunjukkan bahwa perairan Laut Jawa memiliki kesuburan yang cukup tinggi dan tergolong Eutrofik karena rata-rata bulanan secara umum mulai dari tahun 2017-2021 memiliki nilai NPP >750 mgC/m2/hari. Nilai produktivitas primer mengikuti pola musim, akan tinggi pada musim timur (kemarau) dan menurun pada musim barat (penghujan).
爪哇海是印尼渔业资源开采率最高的地区。尽管爪哇海的面积只占全国水域总面积的7%，但该国渔业总产量的32%或220万吨来自爪哇海的捕鱼量。渔业生产力与浮游植物或叶绿素-a活动产生的净初级生产力值有关。净初级生产力(NPP)受营养物、光、叶绿素-a、光合有效辐射(PAR)和海表温度(SST)的影响。本研究利用Aqua-MODIS卫星影像，采用垂直广义生产模型(vertical Generalized Production Model, VGPM)方法，分析爪哇海2017-2021年净初级生产力的分布值。结果表明，爪哇海水体具有较高的肥力，2017-2021年的月平均NPP值为750 mgC/m2/d，属于富营养化水体。初级生产力值具有明显的季节特征，东部月圆季较高，西部季风季较低。在印度尼西亚，爪哇merupakan wilayah dengan laju ekploitasi sumberdaya perkanan tertinggi。塞巴尼亚达32%，总生产总值达7%，总生产总值达32%，总生产总值达32%，总生产总值达32%，总生产总值达32%，总生产总值达7%，总生产总值达7%。浮游生物的生产活性与浮游生物的生产活性有关。光合有效辐射(PAR)、光合有效辐射(SPL)、光合有效辐射(PAR)和光合有效辐射(SPL)。Aqua-MODIS蒙古国蒙古国方法垂直广义生产模型(VGPM)蒙古国研究，2017-2021。Hasil penelitian menunjukkan bahwa perairan Laut java memoriliki kesuburan yang cuup tinggi dan tergolong Eutrofik karena rata-rata bulanan secara umum mulai dari tahun 2017-2021 memoriliki nilai NPP >750 mgC/m2/hari。Nilai producktivitas primer mengikuti pola musim, akan tinggi pada musim timur (kemarau)和menurun pada musim barat (penghujan)。
{"title":"Pemanfaatan Citra Satelit Aqua-MODIS untuk Pemantauan Dinamika Spasio-Temporal Produktivitas Primer Bersih di Perairan Laut Jawa","authors":"Alfandy Putra Anugrah, Zainul Hidayah, Abdurrahman As-Syakur, Herlambang Aulia Rachman","doi":"10.14710/jkt.v26i3.18222","DOIUrl":"https://doi.org/10.14710/jkt.v26i3.18222","url":null,"abstract":"The Java Sea is an area with the highest rate of exploitation of fishery resources in Indonesia. As much as 32% of the total national fishery production or 2.2 million tons has come from catches in the Java Sea, even though the area of these waters only covers 7% of the total area of national waters. Fisheries productivity is related to the net primary productivity value resulting from the activity of phytoplankton or chlorophyll-a. Net primary productivity (NPP) is influenced by the presence of nutrients, light, chlorophyll-a, Photosynthetically Available Radiation (PAR) and sea surface temperature (SST). The purpose of this research is to analyze the distribution value of net primary productivity in the Java Sea by utilizing Aqua-MODIS satellite imagery using the Vertically Generalized Production Model (VGPM) method with a range of 2017-2021. The results showed that the waters of the Java Sea have quite high fertility and are classified as Eutrophic because the general monthly average from 2017-2021 has an NPP value of >750 mgC/m2/day. The value of primary productivity follows the seasonal pattern, will be high in the east moonson season and decrease in the west monsoon season. Laut Jawa merupakan wilayah dengan laju eksploitasi sumberdaya perikanan tertinggi di Indonesia. Sebanyak 32% dari total produksi perikanan nasional atau sebesar 2,2 juta ton berasal dari hasil tangkapan di Laut Jawa meskipun luas wilayah perairan ini hanya mencakup 7% dari total luas wilayah perairan nasional. Produktivitas perikanan tangkap berhubungan dengan nilai produktivitas primer bersih hasil dari aktivitas fitoplankton atau klorofil-a. Produktivitas primer bersih di suatu perairan dipengaruhi oleh adanya unsur hara, cahaya, klorofil-a, Photosynthetically Available Radiation (PAR) dan suhu permukaan laut (SPL). Tujuan dari penelitian ini adalah untuk menganalisis nilai distribusi produktivitas primer bersih di Laut Jawa dengan memanfaatkan citra satelit Aqua-MODIS menggunakan metode Vertically Generalized Production Model (VGPM) dengan rentang tahun 2017-2021. Hasil penelitian menunjukkan bahwa perairan Laut Jawa memiliki kesuburan yang cukup tinggi dan tergolong Eutrofik karena rata-rata bulanan secara umum mulai dari tahun 2017-2021 memiliki nilai NPP >750 mgC/m2/hari. Nilai produktivitas primer mengikuti pola musim, akan tinggi pada musim timur (kemarau) dan menurun pada musim barat (penghujan).","PeriodicalId":53001,"journal":{"name":"Jurnal Kelautan Tropis","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135503311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-27DOI: 10.14710/jkt.v26i3.18049
Eko Hardianto, Tony Budi Satriyo
The Asian monsoon scallop, Amusium pleuronectes, is a key member of shellfish communities that are the most commercially harvested in Asia. Materials were obtained from four sites in Indonesia: Semarang, Bali Island, Maros and Buru Island. Nucleotide sequence analysis was performed on PCR-amplified mitochondrial DNA 16S rRNA. In total, 556-558 base pair nucleotide sequences were obtained from 8 individuals. Molecular analyses revealed that the samples belong to the A. pleuronectes species. Phylogenetic analyses were carried out by comparing the gene sequences of A. pleuronectes haplotypes in Indonesia with gene sequences of the same base pair length and with the of A. japonicum which was used as an outgroup. The phylogenetic trees were consistent and indicated in the two sub-clades. The presence of A. pleuronectes and the phylogenetic status of the A. pleuronectes Indonesian haplotype were reported. Clarifying the phylogenetic status of ecologically important species provides basic information for biosecurity studies for possible future conservation and control programs.
{"title":"Molecular phylogenetic analysis of commercially important Asian monsoon scallop, Amusium pleuronectes (Linnaeus 1758) from Indonesia","authors":"Eko Hardianto, Tony Budi Satriyo","doi":"10.14710/jkt.v26i3.18049","DOIUrl":"https://doi.org/10.14710/jkt.v26i3.18049","url":null,"abstract":"The Asian monsoon scallop, Amusium pleuronectes, is a key member of shellfish communities that are the most commercially harvested in Asia. Materials were obtained from four sites in Indonesia: Semarang, Bali Island, Maros and Buru Island. Nucleotide sequence analysis was performed on PCR-amplified mitochondrial DNA 16S rRNA. In total, 556-558 base pair nucleotide sequences were obtained from 8 individuals. Molecular analyses revealed that the samples belong to the A. pleuronectes species. Phylogenetic analyses were carried out by comparing the gene sequences of A. pleuronectes haplotypes in Indonesia with gene sequences of the same base pair length and with the of A. japonicum which was used as an outgroup. The phylogenetic trees were consistent and indicated in the two sub-clades. The presence of A. pleuronectes and the phylogenetic status of the A. pleuronectes Indonesian haplotype were reported. Clarifying the phylogenetic status of ecologically important species provides basic information for biosecurity studies for possible future conservation and control programs.","PeriodicalId":53001,"journal":{"name":"Jurnal Kelautan Tropis","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135503312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-26DOI: 10.14710/jkt.v26i2.18173
Fani Safitri, Luky Adrianto, Wayan Nurjaya, ¹Departemen Manajemen, Sumberdaya Perairan, F. Perikanan, Ilmu Kelautan
Mangrove ecosystem in Semarang City has an important role for survival of the coastal area. This is due to the function of mangroves as a barrier to coastal erosion, wave barrier, carbon producer, as a habitat for biota in coastal areas, as well as improving water quality. However, as time goes by, mangroves condition in coastal of Semarang is decreasing every year and causing coastal disasters such as coastal erosion and tidal flooding which have identically occurred on the coast of Semarang. Mangrove ecosystem area in coastal of Semarang City in 2020 is 163,250 Ha. The aim of this study is to determine the density of mangroves ecosystem from 2013 to 2022 with Landsat 8 and Sentinel 2 satellites. The method used to classify and determine the density of mangroves ecosystem is NDVI or Normalized Difference Vegetation Index. The results of analysis show that the mangrove density in 2013 was 412.889 Ha, while in 2022 it was 142.562 Ha. The density of mangroves has decreased by around 270.327 Ha (65.5%), this is due to erosion, land conversion into pond areas, and recently the construction of the Semarang-Demak sea wall. Whereas Sentinel 2 satellite is better to use because it has better image quality, details, and accuracy to show objects on the earth's surface compared to Landsat 8. Ekosistem mangrove di Kota Semarang memiliki peran yang penting bagi keberlangsungan hidup wilayah pesisir. Hal tersebut dikarenakan fungsi mangrove sebagai penahan erosi pantai, penahan gelombang, penghasil karbon, sebagai habitat bagi biota di wilayah pesisir, serta memperbaiki kualitas air. Namun seiring perkembangan zaman, kondisi mangrove di pesisir Semarang semakin tahun kian berkurang sehingga menimbulkan bencana pesisir seperti terjadinya erosi pantai dan banjir rob yang telah identik terjadi di pesisir Semarang. Luas ekosistem mangrove di wilayah pesisir Kota Semarang pada tahun 2020 yaitu seluas 163,250 Ha. Tujuan dari penelitian ini yaitu untuk mengetahui kerapatan ekosistem mangrove dari tahun 2013 hingga 2022 dengan citra satelit Landsat 8 dan citra Sentinel 2. Metode yang digunakan untuk mengelaskan dan mengetahui kerapatan ekosistem mangrove adalah metode NDVI atau Normalized Difference Vegetation Index. Hasil analisa menunjukkan bahwa kerapatan mangrove pada tahun 2013 seluas 412,889 Ha, sedangkan pada tahun 2022 seluas 142,562 Ha. Kerapatan mangrove mengalami penurunan sekitar 270,327 Ha (65,5%), hal tersebut disebabkan karena adanya erosi, alih fungsi lahan menjadi area tambak, serta baru-baru ini yaitu adanya pembangunan tanggul laut Semarang-Demak. Sedangkan citra satelit Sentinel 2 merupakan citra yang lebih baik digunakan karena memiliki kualitas gambar yang lebih bagus, detail, dan akurat untuk menunjukkan obyek dipermukaan bumi dibandingkan dengan citra Landsat 8.
三宝垄市的红树林生态系统对沿海地区的生存具有重要作用。这是由于红树林作为海岸侵蚀的屏障、波浪屏障、碳生产者、作为沿海地区生物区系的栖息地以及改善水质的功能。然而，随着时间的推移，三宝垄海岸的红树林状况每年都在减少，造成了三宝垄海岸同样发生的海岸侵蚀和潮汐洪水等海岸灾害。2020年三宝垄市沿海红树林生态系统面积为163,250公顷。本研究的目的是利用陆地卫星8号和哨兵2号卫星确定2013年至2022年红树林生态系统的密度。红树林生态系统密度分类和确定的方法是NDVI或归一化植被指数。分析结果表明，2013年红树林密度为412.889 Ha, 2022年为142.562 Ha。红树林的密度减少了约270.327公顷(65.5%)，这是由于侵蚀、土地转变为池塘区，以及最近三宝朗-德马克海堤的建设。而哨兵2号卫星更好使用，因为与Landsat 8相比，它有更好的图像质量、细节和精度来显示地球表面的物体。生态系统红树林在哥打三宝垄纪念peran yang penting bagi keberlangsungan hidup wilayah perisir。红树群落，红树群落，红树群落，红树群落，红树群落，红树群落，红树群落，红树群落，红树群落。三宝郎主席，红树之王，红树之王，红树之王，红树之王，红树之王，红树之王，红树之王，红树之王，红树之王，红树之王。Luas生态系统红树林的面积为163,250公顷。图juan dari penelitian ini yitu untuk mengetahui kerapatan生态系统红树林dari tahun 2013兴加2022登甘柑橘卫星陆地卫星8号丹柑橘哨兵2号。红树林生态系统NDVI归一化植被指数。Hasil analisa menunjukkan bahwa kerapatan红树林pada tahun 2013年的面积为412,889公顷，sedangkan pada tahun 2022年的面积为142,562公顷。Kerapatan红树林mengalami penurunan sekitar 270,327 Ha (65,5%)， haltersebut disebabkan karena adanya erosi, alih funsi lahan menjadi area tambak, serta baru-baru ini yitu adanya pembangunan tanggul laut Semarang-Demak。Sedangkan citra卫星Sentinel 2 merupakan citra yang lebih baik digunakan karena memiliki kualitas gambar yang lebih bagus, detail, dan akurat untuk menunjukkan obyek dipermukaan bumi dibandingkan dengan citra Landsat 8。
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Pub Date : 2023-06-03DOI: 10.14710/jkt.v26i2.16496
Muhardi Rais, Dwi Fajriyati Inaku, W. Moka, Supriadi Mashoreng, Dewi Yanuarita Satari, Nita Rukminasari
Seagrass is the most effective ecosystem in absorbing carbon. The ability of seagrasses to absorb CO2 from the atmosphere is better than terrestrial ecosystems. Image processing methods and information regarding potential carbon stocks in seagrass beds can then be used as a basis for managing carbon stocks found in coastal areas and small islands. This study aims to estimate the carbon stock of seagrass beds in the waters of Kodingarenglompo Island using remote sensing technology. This research was conducted from March to August 2020. The stages of the field survey were to identify the percentage of seagrass cover in 62 plot points. Seagrass carbon stocks are known based on seagrass cover percentage data using the regression equation. The estimation of seagrass carbon stocks in the study area is divided into two, namely AGC and BGC. The image processing stage is by using the random forest regression algorithm in mapping seagrass carbon stocks. The results of this research survey revealed six species of seagrass, namely Cymodocea rotundata, Enhalus acoroides, Halodule uninervis, Halophila ovalis, Thalassia hemprichii and Syringodium isoetifolium and were dominated by 2 species of seagrass, namely Thalassia hemprichii and Enhalus acoroides. The results showed that remote sensing can be used to map seagrass carbon stocks. Seagrass carbon stocks can be mapped with a maximum accuracy of 67% (SE=1.96 KgC/Pixel), and 85% (SE=7.86 KgC/Pixel) for AGC and BGC. From this model, the total ecosystem carbon stock in seagrasses in the waters of Kodingarenglompo Island is estimated to be around 178.98 tons of organic carbon with an area of seagrass beds of 81.29 hectares. The availability of seagrass carbon stock maps is very important to provide a better understanding of the spatial and temporal distribution of carbon dynamics. Lamun adalah ekosistem yang paling efektif dalam menyerap karbon. Kemampuan lamun untuk menyerap CO2 dari atmosfer lebih baik dari ekosistem darat. Metode pengolahan citra serta informasi mengenai potensi cadangan karbon pada padang lamun selanjutnya dapat dijadikan sebagai dasar pengelolaan stok karbon yang terdapat di pesisir dan pulau-puau kecil. Penelitian ini bertujuan untuk mengestimasi stok karbon padang lamun di perairan Pulau Kodingarenglompo menggunakan teknologi penginderaan jauh. Penelitian ini dilaksanakan dari bulan Maret sampai Agustus 2020. Tahapan survei lapangan yaitu mengidentifikasi persentase tutupan jenis padang lamun sebanyak 62 plot titik. Stok karbon lamun diketahui berdasarkan data persentase tutupan lamun menggunakan persamaan regresi. Estimasi stok karbon padang lamun pada daerah kajian dibedakan menjadi dua yaitu AGC dan BGC. Tahap pengolahan citra yaitu dengan menggunakan algoritma regresi random forest dalam memetakan stok karbon lamun. Hasil survei penelitian ini mendapatkan enam jenis lamun yaitu Cymodocea rotundata, Enhalus acoroides, Halodule uninervis, Halophila ovalis, Thalassia hemprichii dan Syring
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