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All Journal JURNAL HUKUM Maspari Journal Jurnal Veteriner Jurnal Natur Indonesia Jurnal Perikanan dan Kelautan Berkala Perikanan Terubuk Jurnal Ilmu Lingkungan Jurnal Kajian Lingkungan Bulletin of Electrical Engineering and Informatics Jurnal Ilmu Perairan (Aquatic Science) Maspari Journal Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan JURNAL BIOLOGI INDONESIA Science and Technology Indonesia IJEBA (International Journal of Economic, Business & Applications) JURNAL PHOTON Jurnal Ilmu Kedokteran dan Kesehatan Asian Journal of Aquatic Sciences ECOTONE SIMBIOSA Jurnal Zona Journal of Coastal and Ocean Sciences Devotion: Journal of Research and Community Service Journal of Rural and Urban Community Empowerment SEHATI: Jurnal Kesehatan Dinamika Lingkungan Indonesia CANANG: Jurnal Pengabdian Masyarakat Jurnal Ilmiah Multidisiplin (JUKIM) Jurnal Ilmu-Ilmu Kehutanan EcoNews Jurnal Manusia dan Lingkungan South East Asian Marine Sciences Journal Jurnal Perikanan dan Kelautan Jurnal Senpling Multidisiplin Indonesia Tropical Marine Environmental Sciences Jurnal Natur Indonesia
Yusni Ikhwan Siregar
Universitas Riau
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Environmental Science Health Professions Immunology & microbiology Materials Science & Nanotechnology Medicine & Pharmacology Nursing Physics Public Health Social Sciences Veterinary Other

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Potential Carbon Stock and Absorption in Mangroves in Penempul Village, Sungai Sembilan District, Dumai City, Riau Province Yuhanda, Sabina Dwi; Siregar, Yusni Ikhwan; Tanjung, Afrizal
Journal of Coastal and Ocean Sciences Vol. 6 No. 3 (2025): September
Publisher : Department of Marine Science, Faculty of Fisheries and Marine Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jocos.6.3.189-196

Abstract

Global warming is caused by increased greenhouse gas emissions, particularly CO₂, and can be controlled through carbon sequestration by vegetation, including mangrove forests. The study was conducted in January and February 2025 in the mangrove area of Penempul Village, Sungai Sembilan District, Dumai City, Riau Province, to determine the density in relation to biomass, carbon stock, and CO₂ absorption, as well as to investigate the relationship between density and biomass, carbon stock, and CO₂ absorption. The method used in this study was a survey method with a purposive sampling technique, which involved measuring the diameter of mangrove tree trunks at chest height (DBH). Mangrove biomass calculations were performed using allometric equations, and biomass was converted into carbon stock and CO₂ absorption. The study results indicated the presence of 11 mangrove species, with average estimated biomass, carbon stock, and CO₂ absorption values of 521.84 tons/ha, 245.25 tons/ha, and 899.35 tons/ha, respectively. The ANOVA results showed significant differences (p > 0.05) between the three stations regarding biomass, carbon stock, and CO₂ absorption. Mangrove density had a weak correlation with biomass, carbon stock, and CO₂ absorption, with a correlation coefficient of 0.299.
Analysis of Carbon Emission Levels in the SSH Forest Area Based on Land Cover Change Oktama R, Dhea; Ikhwan Siregar, Yusni; Suwondo, Suwondo
Devotion : Journal of Research and Community Service Vol. 5 No. 12 (2024): Devotion: Journal of Community Research
Publisher : Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/devotion.v5i12.25374

Abstract

The Sultan Syarif Hasyim (SSH) Forest Park (Tahura) area in Riau Province is a forest conservation area that has an important role in maintaining the balance of the ecosystem, especially in terms of carbon sequestration and carbon emission reduction. This study aims to measure the level of carbon emissions resulting from land cover changes and analyze the main causative factors of carbon emissions in the Tahura SSH area. The methods used include field analysis, measurement of carbon emissions based on land cover changes, and data processing using emission modeling software. The results show that carbon emissions in this region are mainly caused by deforestation and land clearing activities, which accelerate the release of carbon stored in forest biomass. In addition, this study provides recommendations for mitigation strategies that can be carried out, such as forest rehabilitation efforts, sustainable land management, and strengthening conservation policies. This research is expected to be an important reference in efforts to reduce carbon emissions in conservation forest areas and encourage policies that support environmental sustainability.
Pengaruh Pupuk Kompos Hasil Pengolahan Sampah Organik Rumah Tangga terhadap Pertumbuhan Bibit Matoa Nawari; Thamrin; Siregar, Yusni Ikhwan; Efriyeldi
Jurnal Ilmu Ilmu Kehutanan Vol. 9 No. 2 (2025)
Publisher : Jurusan Kehutanan Fakultas Pertanian Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jiik.9.2.%p

Abstract

Processing household organic waste of plant parts into organic fertilizer can reduce pollution and greenhouse gas emissions in urban areas. The organic fertilizer produced supported sustainable agriculture. This study aims to determine the effect of applying organic compost fertilizer on the growth of Pometia pinnata seedlings propagated from seed germination in the nursery. The research design employed an experimental approach, specifically a completely randomized design. ANOVA and Tukey HSD were used to determine the effect of compost fertilizer doses on the growth of Pometia pinnata seedlings. The analysis shows that the morphological parameters of seedlings with compost fertilizer application were better than those of the control. The best dose that consistently provided better morphology parameters of seedlings was 75 g/polybag in a 10x20 cm size. Applying organic fertilizer supports the physiology of seedlings and provides proportional seed growth. Thus, the seedlings' sturdiness quotients are more potent than those of the control groups. Organic fertilizer production from household organic plant waste and planting Pometia pinnata for greening have the potential to mitigate climate change and enhance food security at the research location.
Optimizing tilt angle of the roof for the best performance ratio of rooftop photovoltaic Dani Ali, Nurhalim; Bahri, Syaiful; Ikhwan Siregar, Yusni; Suwondo, Suwondo; Anhar, Anhar; Lysbetti Marpaung, Noveri; Muhammad, Juandi; Hasyim Rosma, Iswadi
Bulletin of Electrical Engineering and Informatics Vol 14, No 6: December 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v14i6.11126

Abstract

Rooftop photovoltaic (RPV) systems are becoming increasingly popular as a source of renewable energy. One key factor that significantly affects the performance of RPV systems is the tilt angle of the solar panels. This study aims to determine the optimal tilt angle to maximize electricity production for the RPV system installed on academic building, Department of Electrical Engineering, Faculty of Engineering, University of Riau. The research method used is the PVSyst simulation. The simulation data input was used as daily weather for one year. In this study, variations in roof tilt angles of 5°, 10°, 15°, 20°, and 25° were examined. The results show that the optimal tilt angles for this location are 5° and 10°. At a 5° tilt angle, the RPV can generate 247,128 kWh per year with a performance ratio (PR) of 83%. And then at a 10° tilt angle, the system can generate 248,012 kWh per year with a PR of 82%. Based on the simulation results, other tilt angles also produced higher energy outputs but yielded lower PR values. This study provides practical recommendations for designing RPV systems in regions with similar weather conditions.
Legal and Spatial Perspectives on Sustainable Built-Up Land Conversion Control in Pekanbaru Wirawan, Bayu Andrianto; Siregar, Yusni Ikhwan; Sukendi, Sukendi; Mulyadi, Mulyadi
Jurnal Hukum Vol 41, No 4 (2025): Jurnal Hukum
Publisher : Unissula

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26532/jh.v41i4.45024

Abstract

The rapid expansion of built-up land, measured as Impervious Surface Area (ISA), in Pekanbaru City has raised concerns about urban sustainability and regulatory compliance. This study develops a sustainable control model for built-up land growth integrating normative-legal and empirical-spatial perspectives. Using the Spatial Sustainability Assessment Model (SSAM) and GIS, 702,556 raster pixels of spatial data were analyzed, and systematic sampling generated 76 sample points for logistic regression analysis. Sixty-seven independent variables were examined, comprising biophysical (12), social (31), and economic (24) factors. Ensemble machine learning models, particularly CatBoost with GoldenFeatures, were applied to predict ISA growth and identify key drivers, including urban land values, population density, and the location of health and education facilities. Findings indicate that weak enforcement of relevant laws and regional regulations exacerbates unregulated land conversion. The study provides actionable insights for local governments, recommending stricter zoning enforcement, alignment with environmental laws, and targeted monitoring of high-risk areas to achieve sustainable urban growth. It recommends using the model for risk-based monitoring, enabling a shift from reactive penalties to proactive zoning enforcement to achieve sustainable urban growth.
Survival and Growth Performance of Catfish Larvae (Anabas testudineus) with Moina sp. Enriched with Viterna: Innovative Application in Aquaculture Harianto Harianto; Sukendi Sukendi; Yusni Ikhwan Siregar; Benny Heltonika
Jurnal Ilmiah Multidisiplin Vol. 4 No. 03 (2025): Mei: Jurnal Ilmiah Multidisiplin
Publisher : Asosiasi Dosen Muda Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56127/jukim.v4i03.2001

Abstract

The Betok fish (Anabas testudineus) is one of the freshwater fish species with potential for aquaculture. Larvae rearing faces challenges, namely low survival rates due to low nutrient content in the feed. Therefore, it is necessary to supplement Moina sp. with viterna. This study aims to determine the optimal dose of viterna in Moina sp. supplementation to improve the survival rate and growth of Betok fish larvae. The method used is an experiment. The experimental design employed is a Complete Randomised Design (CRD) with one factor and three treatments, each repeated three times. The treatments involved enriching Moina sp. with viterna at different doses: D0 = 0 ml/L (control), D20 = 20 ml/L, D40 = 40 ml/L, and D60 = 60 ml/L. The results of the study showed that the enrichment of Moina sp. with different viterna doses affected the survival rate and growth of betok fish larvae. The best treatment was D60, with absolute weight growth of 0.47 g, specific growth rate of 8.01%/day, absolute length growth of 2.64 cm, and survival rate of 93.33%. The water quality parameters obtained included temperature 26–29.1°C, pH 6.3–7.1, and dissolved oxygen (DO) 5.3–6.2 ppm.
Hubungan Kandungan Bahan Organik dengan Kelimpahan Makrozoobentos di Hutan Mangrove Desa Mengkapan, Kecamatan Sungai Apit, Kabupaten Siak Andri, Rinda Juni; Siregar, Yusni Ikhwan; Zulkifli, Zulkifli
Ilmu Perairan (Aquatic Science) Vol. 13 No. 3 (2025): November
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jipas.13.3.387-392

Abstract

Penelitian ini dilaksanakan pada bulan Februari - Mei 2024 yang berlokasi di Muara Sungai Desa Mengkapan, Kecamatan Sungai Apit, Kabupaten Siak. Tujuan dari penelitian ini adalah untuk mengetahui kandungan bahan organik, kelimpahan makrozoobentos dan hubungan kandungan bahan organik dengan kelimpahan makrozoobentos. Metode yang digunakan adalah metode survei. Pada lokasi penelitian ditemukan 9 spesies yaitu Littoraria scabra, L. melanostoma, Nerita artriculata, N.violacea, Indothais malayenis, Cerithidea obtusa, C. cingulata, Telescopium telescopium, Ellobium pyramidale. Karakteristik jenis sedimen yang terdapat di hutan mangrove Desa Mengkapan adalah lumpur, lumpur berpasir, lumpur berkerikil dan campuran (kerikil, pasir dan lumpur). Hasil uji regresi linear sederhana untuk hubungan kandungan bahan organik dengan kelimpahan makrozoobentos didapatkan nilai persamaan Y = 0,8229 + 3,0478X dengan nilai koefisien korelasi (r) sebesar 0,923 dan koefisien determinasi (R2) sebesar 0,8529. Nilai r menyatakan hubungan sangat kuat, artinya semakin tinggi kandungan bahan organik maka semakin tinggi kelimpahan makrozoobentos.
Co-Authors ', Arfitrah . Zulfan A.A. Ketut Agung Cahyawan W AA Sudharmawan, AA Adel Zamri Adelina, Adelina Adiana Sulistianto Afriza, Dinny Afrizal Tanjung Agnesia Jaiyani br Barus Agnesia, Yohana Agung Dhamar Syakti Agus Mandar, Agus Agus Susanto Ahmad Faisal Daulay Ahmad Kurnain ahmad rizal Alfi Puadi Alimah Alimah Alimah, Alimah Almasdi Syahza Alvin Natali Amalia Prafitra Harman Amanda, Yossie Anak Agung Istri Sri Wiadnyani Ananta, Dio Alif Andi Yusapri Andrew ST OS Andri, Rinda Juni Anhar Anhar Anisaldi Anisaldi Anita, Sofia Anton Akbar Nugraha Antoni Antoni Antonius ' Apdillah, Doni Aras Mulyadi Arief Mubyarso Arief Rachman. B Aristya Ardhitama Aritonang, Simon Hasintongan Autika, Yotta Azhari, Febbi Bahruddin Bahruddin Bahtiar Denny Edison Barnes Silitonga Batubara, Ummi Mardhiah Bayhakki Bayhakki Bayhakki Bayhakki Bayu Oktavian Benny Heltonika Bintal Amin Budi Darmawan Cik Mas Edison Claudya, Sonia Glory Dahlia Dahlia Dameria Dameria Dandi Arianto Pelly Dani Ali, Nurhalim Dariono Dariono Dariono, Dariono Dariyatmo Dariyatmo Debby Febriani Dedi Afandi Defri Yoza Deni Efizon Denny Mulianto Dermawan, Ernanda Putra Desi Ariani DESI PURNAMA SARI Desis Tri Yenti Dessy Yoswaty Dessy Yoswaty Devid Joehari Dharma Eka Putra Dianysah, Gusti Dilla Andini Doni Apdillah Dr. Nofrizal, S.Pi, M.Si Dyonisius Hutauruk Edy T S Sihombing Efendi, Musanif Effino Panji Sudewo Efriyeldi, Efriyeldi Eko Hendi Saputra Eko Sutrisno Eko Sutrisno, Eko Elda Nazriati Elfizar, Elfizar Elizal Elizal Elizal Endang Agus Damanhuri Erfana Romauli Lumbantoruan Ernawaty Ernawaty Fabri Putra Nugraha Fadel Fadel Fadli Aulia Fajar Fajar Fajriani Ananda Fakhrurrozi Fakhrurrozi FAUZIYAH Febriana Zulmi Febrina Hanum Feliatra Fepi Yulianti Fika Yulia Rachmah Fitri Agustriani Fitri, Yuliza Fransiska, Dina Fuad, M Anwar Fuadi, Indra Ginting, Daniel Paskah Hadi Sastranegara Hadinoto Hadinoto Hafidawati, Hafidawati Hairussalam, Hairussalam Hari Handika Sektiawan Harianto Harianto Hasdi Yanti HS Helmi Putra Hendra Taufik Heni Pujiastuti Henni Elyati Henni Syawal Herli, Irwan Herli, Irwan Hidayat Pratamasari Hutomo, Ragil Tribhakti I Gusti Ngurah Antaryama Iesje Lukistyowati Imam Pangestiansyah Putra Imran , Imran Imran Imran Indra Wariski Indra Wariski Irfan Yunus Irvina Nurachmi irvina Nurachmi Irwandy Syofyan Isjoni Isjoni Islami, Muhammad Dinul Isnaini Jhon Edward Jhon Prengky Jimmy Copriady Johanes Hutagaol Joneri, Romi Jonny Zain Juandi Juandi Karnila, Rahman Karnila Kevin Anandika Dwi Putra Khawarizmi, Dannes M. Khotimah, Nadila Nur Kurniawan, Rika Laura Dameshita Silalahi Lee, Seung Hun Lilis Kurnia Lilis Kurnia Lita Febriani Lubis, Abdillah Lysbetti Marpaung, Noveri M. Delpopi M. Imran Sinaga Maliki Maliki Manalu, Govinda Hendra Marpauang, EkoRinaldi Maulana Hardi Melki Meuthia Pangerani Miduk Tampubolon Mirna Ilza Miswadi Miswadi Mubarak Mubarak Mubarak Mubarak Mubarak Mubarak Mubarak Mubarak Muhammad Arif Fahrurozi Muhammad Fahrul Mulyadi Mulyadi Musrifin Galib Nabila, Amelia Nafril Yuzen Nawari Nawari Nawari Neni Ristiani Nofrizal Nofrizal Nofrizal Nofrizal Nofrizal Nofrizal Nofrizal Nofrizal Nofrizal Nofrizal Noprianda, Renza Novi Permata Sari Nugrahani Trie Ryzzky Nurafni, Melia Nurrahmi, Febi Nursyirwani, Nursyirwani Nurul Abdiah Nasution Oktama R, Dhea Oktavia Dewi Oktavia Dewi, Oktavia Olfa Riyana Prastya Bayu Afrian Purnama, Indra Dwi Putra Putra, Kevin Anandika Dwi Putri Kalbina Rahmadi Rahmadi Rahmadi Rahmadi Ramses Ramses Firdaus, Ramses Ramses Ramses Rasoel Hamidy Razai, Tengku Said Redho Yoga Nugroho Ridwan Manda Putra Rifardi Rika Kurniawan Rika Kurniawan Rika Kurniawan Rinaldo, Rinaldo Rinaldo, Rinaldo Riris Aryawati Risna Nofriani Ritonga, Agnesia Rivaldi Ananda Dwi Putra Roito, Martin Romi Joneri Rommie Jhonerie Ronal Yuriza Fithra Rosma, Iswadi Hasyim Rosyidin, Hidayatul Rozirwan . Salsabilla, Dila Azzahra Sania Glory Claudya Sanya Gautami Saputra, Muhammad Nasrul Septian Julifar Silaban, Tulus Gandra Saputra Siti Zahrah Siti Zahrah Situmorang, Nesi Silvia Sofia Anita Sofyan Husein Siregar Sri Indarti Sukendi Sukendi Sukendi Sukendi Sumanti, Susi Suwondo Suwondo Suyanto Suyanto Syafriansyah, Syafriansyah Syafruddin Nasution Syahril Nedi Syahril Syahril Syahril Syahril SYAIFUL BAHRI Syaiful Ramadhan Harahap Syarwandi David T. Edy Sabli Tengku Nurhidayah Thamrin Thamrin ' Thamrin Thamrin Thamrin Thamrin Thamrin Thamrin Thamrin Thamrin Thamrin Thamrin Tyas Handayani Uju Doi Sibarani Verid Aria Susammesin, Verid Aria Viktor Amrifo Viktor Amrivo Vivi Indriani Vivin Seygita Vivin Seygita, Vivin Wariski, Indra Wike Ayu Eka Putri Wirawan, Bayu Andrianto Yana, Tesya Desi Yani, Indah Novi Yanti Dasrita Yanti Dasrita, Yanti Yetti Elfina Yossie Amanda Yuhanda, Sabina Dwi Yulindra, Ade Yuwanda Ilham Zahtamal Zahtamal Zulfahmi, Sayid Zulfan Saam Zulfan Saam Zulfan Saam Zulfan Saam Zulfan Saam Zulfikar, Andi Zulhendri Zulhendri Zulkarnain Zulkarnain Zulkarnain Zulkarnain Zulkarnaini Zulkarnaini Zulkifli Zulkifli