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All Journal Jurnal Natur Indonesia Jurnal Perikanan dan Kelautan Berkala Perikanan Terubuk Jurnal Ilmu Lingkungan Jurnal Kajian Lingkungan Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Aquasains : Jurnal Ilmu Perikanan dan Sumberdaya Perairan Asian Journal of Aquatic Sciences Jurnal Zona Journal of Coastal and Ocean Sciences Journal of Rural and Urban Community Empowerment Dinamika Lingkungan Indonesia Bhakti Nagori (Jurnal Pengabdian kepada Masyarakat) EcoNews Jurnal Perikanan dan Kelautan Tropical Marine Environmental Sciences Jurnal Natur Indonesia
Sofyan Husein Siregar
Universitas Riau
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Education Energy Environmental Science Immunology & microbiology Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Physics Social Sciences Other

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The Oil Content andthe Diatom Density in TanjungTiram Waters of Batu Bara Regency, North Sumatera Province Bahri S, Aswan; Amin, Bintal; Siregar, Sofyan Husein
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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Abstract

ABSTRACT  This research was conducted on july 2018  in Tanjung Tiram Waters of Batu Bara regency, North Sumatera province. It aims to analyze the oil content  and  the diatom density.The sample was analyzedin the Marine Chemistry and Marine Biology Laboratory, Faculty of Fisheries and Marine, Universitas Riau. The survey method used in this research was purposive which consisted of four stations. Each station is repeated in three times. It known that the oil content in water ranged 0,1722 – 0,4341 ppm.According to standard quality value of sea water, the oil content of water has not exceeded the threshold value (<5 ppm). The results of calculating the abundance of diatoms are known to be the highest in station 4 with the number 144 ind / l, while the lowest abundance of diatoms is at station 1 with a number of 97 ind / l. The mostof diatom species found is Nitzschia sp., Skeletonema sp., Leptocylindrus sp., and Coscinodiscus sp.Based on the level of fertility, the abundance of the diatoms in TanjungTiram area is categorized as oligotrophic waters, namely waters that have a low fertility level with a range between 0 - 2000 ind / l.The correlation of oil content and the diatom density are declared in mediocrevalue with coefficient of 0.53.   Key words : Pollution, Oil Content, Diatom, North Sumatera
ABUNDANCE OF FISH INDICATORS OF CORAL REEF FAMILY CHAETODONTIDAE IN THE WATERS OF LAGOI BINTAN REGENCY OF RIAU ISLANDS PROVINCE BY : Marpauang, EkoRinaldi; Siregar, Yusni Ikhwan; Siregar, Sofyan Husein
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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ABSTRACTA Study on the abundance of Chaetodontidae, coral cover and  relationship of  abudance with coral cover were conducted from May -          July 2019 in the Lagoi Waters of Bintan Regency of  Riau Islands Province. Abudance of fish observed with Underwater Visual Census (UVC) method while coral cover with Reef Check  method. Apparently the abundance of Chaetodontidae fish ranged from 313.3 - 603.3 ind/ha whereas coral cover ranging from 46 - 74%.Forthat, abudance of coral fish corelated (r = 0.977) with coral cover, suggest that, there is a very strong relationship between live coral cover and Chaetodontidae fish. Key words :Chaetodontidae, Coral Reef, Lagoi Waters
MANGROVE HEALTH ANALYSIS USING HEMISPHERICAL PHOTOGRAPHY METHOD IN SUNGAI GUNTUNG WATERS OF KATEMAN DISTRICT INDRAGIRI HILIR REGENCY RIAU PROVINCE Muhammad, Andi Syahroni; Mulyadi, Aras; Siregar, Sofyan Husein
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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ABSTRACT Along the river and coastal waters of the Sungai Guntung of Kateman District Indragiri Hilir Regency Riau Province covered with mangroves forreduceswell wind, seawave, and sea water intrusion. There is potential destruction to mangrove in the Sungai Guntung such as industrial activities and use of mangrove stems for building foundation materials. The purpose of this researchis determine the type of mangroves dominate and determine the health of mangroves using hemispherical photgraphy method and line transect plot method. The survey was conducted from July 2019 in the Sungai Guntung of Indragiri Hilir district by determining the station with purposive sampling, station 1around the settlement, station 2 at the estuary far from the settlement, and station 3 around  the industry. The results of this study indicate there are 11 types of mangroves from 5 different families dominated by R. apiculata mangrove species, mangrove health in the Sungai Guntung is still in good condition, station 1 canopy closure 79,56% with density 1.456 trees/ha, station 2 canopy closure 81,92% with density 1.622 trees/ha, and station 3 canopy closure 75,73% with density 1.122trees/ha. Kata kunci : Mangrove,Dominance, Density, Canopy cover, Hemispherichalphotography.
Struktur Komunitas Diatom Epifit pada Pelepah Nypa Fruticans di Sekitar Pulau Cawan Kabupaten Indragiri Hilir Provinsi Riau Arifin, Nur; Siregar, Sofyan Husein; Nurrachmi, Irvina
Jurnal Perikanan dan Kelautan Vol 23, No 1 (2018)
Publisher : Fakultas Perikanan dan Kelautan Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jpk.23.1.1-7

Abstract

Diatoms are the largest phytoplankton group and as the primary producer in marine waters. This research was conducted in September 2016 around Cawan Island of In-dragiri Hilir Regency of Riau Province. The aim of this research was to determine the structure of epiphytic diatom community on the midrib of Nypa fruticans and to deter-mine water quality as well as to see the relationship of epiphytic diatoms abundance with water quality. The survey method was applied in this research and sampling loca-tion determined by purposive sampling. Measurement of water quality was done by in situ and ex situ which consist of biology, physics and chemical parameters. Nitrate concentrations in waters ranged from 0,0139 to 0,0639 mg/l and phosphate concentra-tions ranged from 0,1342 to 0,2345 mg/l. The epiphytic diatoms on the midrib of Nypa fruticans in Cawan Island consist of 18 genera of diatoms, the average value of abun-dance ranged from 7.385 to 23.042 individual/cm2, the mean value of diversity index ranged from 1,41 to 2,05.The dominance index value ranged from 0,27 to 0,52 and the uniformity index value ranged from 0,58 to 0,91. Meanwhile, the correlation of diatom abundance with concentration of nitrate was 0,21 (weak relationship) and correlation of diatomic abundance with phosphate concentration was 0,11 (very weak relation-ship). Based on the result of epiphytic diatom calculation on the midrib of Nypa fruti-cans can be concluded that the waters in Cawan Island was in medium contaminated condition.
Relationship of Organic Content in Sediment with Morphometric Mangrove Leaves (Rhizophora apiculata) in the West Mangrove Ecosystem, Dumai City, Riau Province Audina, Mia; Siregar, Sofyan Husein; Amin, Bintal
Jurnal Perikanan dan Kelautan Vol 26, No 1 (2021)
Publisher : Fakultas Perikanan dan Kelautan Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jpk.26.1.54-61

Abstract

The damage rate of mangrove forests in Indonesia is considered as the fastest and largest in the world. The reduced density of mangroves can be influenced by the water quality and the organic matter content around the mangrove ecosystem, causing changes in the mangrove leaves both in the shape of the length and width. This study was conducted in the mangrove ecosystem in the western part of Dumai City, with the aim of determining the morphometric size of the leaves of Rhizophora apiculata and its relationship with the content of organic matter in the sediment. The method used in this study was survey method, where observations and sampling were performed directly in the field and some of samples were analyzed in the laboratory. Mangrove density obtained from the research results ranges from 1966.66 - 4700 ind/ha, organic matter content 10.88 -17.21%. The morphometric size of the leaf length varies from 13.03 - 15.05 cm, the leaf width varies from 4.65 - 5.42 cm, and the length of the petiole varies from 1.59 - 1.91 cm. There is no significant relationship between the mangrove leaf morphometric with sediment organic matter in the studied area.
Struktur Komunitas Fitoplankton di Perairan Tanjung Balai Kota Kabupaten Karimun Provinsi Kepulauan Riau Adriana, Alysa; Thamrin, Thamrin; Siregar, Sofyan Husein
Jurnal Perikanan dan Kelautan Vol 22, No 1 (2017)
Publisher : Fakultas Perikanan dan Kelautan Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jpk.22.1.18-26

Abstract

Fitoplankton merupakan produsen primer di suatu perairan yang dapat menunjang kehidupansumberdaya hayati perairan lainnya dan menempati trofik level pertama dalamrantai makanan. Penelitian ini bertujuan untuk mengetahui struktur komunitas fitoplanktonserta hubungan antara konsentrasi fosfat dan nitrat dengan kelimpahan fitoplankton.Penelitian ini dilaksanakan pada bulan januari 2017 di perairan TanjungBalai Kota Kabupaten Karimun Provinsi Kepulauan Riau. Hasil dari penelitian ini ditemukan27 genus dari fitoplankton yang berasal dari 3 kelas, 7 ordo dan 16 famili.Adapun nilai kelimpahan fitoplankton berkisar antara 48 - 79 ind/l. Nilai indeks keanekaragaman(H’) berkisar antara 2,60 – 2,83, indeks dominasi (C) berkisar antara 0,20 –0,23 dan indeks keseragaman (E) berkisar antara 0,77 – 0,80. Berdasarkan uji regresilinear sederhana, model matematis konsentrasi fosfat dengan kelimpahan fitoplanktonyaitu y = 10.90 + (656.4)x dengan nilai korelasi (r) = 0,42 (tergolong sedang). Modelmatematis konsentrasi nitrat dengan kelimpahan fitoplankton yaitu y = 138.3 + (-1207)x dengan nilai korelasi (r) = 0,21 (tergolong lemah)
Effect of Urea with Various Doses on Skeletonema costatum Cell Growth Rosa, Mila; Siregar, Sofyan Husein; Nurrachmi, Irvina
Jurnal Perikanan dan Kelautan Vol 26, No 3 (2021)
Publisher : Fakultas Perikanan dan Kelautan Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jpk.26.3.192-198

Abstract

This research was conducted in March 2020 at BPBALP Teluk Buo, West Sumatera. This research aimed to determine the best dose for urea usage on S. costatum cell growth. The method used in this research was an experimental method using Completely Randomized Design (CRD) with one factor, which was the various doses of urea fertilizer consisting of five treatments with three replications. Urea various doses used were 0 ppm (control treatment), 40 ppm (treatment A), 60 ppm (treatment B), 80 ppm (treatment C), and 100 ppm (treatment D) totaling 15 treatment units. The tested organism in this research was S. costatum. The container used was a plastic jar with 2 liters capacity. The parameters tested in this research were the maximum cell population density achieved by seven days of maintenance, absolute growth rate, relative growth rate, and specific growth rate. The results showed that the best cell density was found at the treatment D (100 ppm), which was 1,228 x 104 cells / mL and the lowest cell density was in the control treatment (without urea) which was 533 x 104 cells / ml. The results of water quality measurements during the study were still in an adequate range and met the maintenance requirements of S. costatum. The range of water quality parameters were salinity 26-28 ppt,  temperature of 25-27oC, and pH of 8.
Tingkat Partisipasi Masyarakat Dalam Mencegah Kebakaran Hutan dan Lahan di Kawasan Penyangga Suaka Margasatwa Giam Siak Kecil Kabupaten Bengkalis Provinsi Riau Rinaldo, Rinaldo; Siregar, Yusni Ikhwan; Siregar, Sofyan Husein
Dinamika Lingkungan Indonesia Vol 4, No 2 (2017)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (567.672 KB) | DOI: 10.31258/dli.4.2.p.128-138

Abstract

The study was conducted from March to May 2016, in the buffer zone of Giam Siak Kecil Wildlife Reserve (SM GSK) Pinggir sub district of Bengkalis, Riau province. Purpose of the study Describe forest and land cover changes as well as hotspot spreads in the GSK SM buffer zone and describe the level of community participation in preventing forest and land fires in SM GSK buffer zones. The result is that the change of forest and land cover in the buffer zone of SM GSK in 2003-2015 occurred due to the opening of land for cultivation activities. The most significant changes occurred in the type of plantation land closure of 31.32% of the buffer area of SM GSK, followed by the swamp bush 15.29%, secondary forest of 10.87% and the plantation forest 9.40%. Data of fire point in sub-district in 2003 as many as 150 points, in 2009 as many as 161 points and 2015 only 31 points. The level of community participation in preventing the occurrence of forest and land fires in the buffer zone of SM GSK is influenced by high economic needs factor (60.16%), knowledge level (49.99%), social needs (59.09%) and implementation Regulations and law enforcement (54.09%) in the medium category. Overall factor of community participation level was in medium category (56,51%).
Strategi Pengelolaan Pengembangan Kawasan Penyangga sebagai Hutan Cadangan Mangrove (Studi Kasus Ekosistem Mangrove Sungai Liung Kecamatan Bantan Kabupaten Bengkalis) Miswadi, Miswadi; Siregar, Sofyan Husein; Siregar, Yusni Ikhwan
Dinamika Lingkungan Indonesia Vol 2, No 2 (2015)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (144.367 KB) | DOI: 10.31258/dli.2.2.p.73-86

Abstract

This study aims to formulate management strategies of mangrove buffer zonedevelopment of Liung River of Bengkalis Island for mangrove agroforestry. Research hasbeen conducted at mangrove areas of Liung River from February 23 through May 27, 2014.The research method is a survey method with descriptive analysis approach. Primary datawere collected through observation and in-depth interviews with a structured questionnaireinstrument. Secondary data were obtained from the relevant department of this research.RapidEye Satellite Imagery Analysis is used to determine the total area of mangrove LiungRiver and the buffer area and the development of strategies using SWOT anilysis. Theanalysis showed that the area of land covering an area of 609.5 hectares of mangrove bufferthe potential for development of mangrove agroforestry which is done in order to reduce thepressure on mangrove forests of Liung River and the opportunity to engage the community inmeeting the needs of mangrove woods. Priority strategies related to the management ofmangrove agroforestry development in principle in the position of management models thatare included in the category of growth and stability strategy, ie a strategy that is implementedwithout changing the direction of a predetermined strategy. It is need the support of localgovernments and other institutions and communities in the implementation of sustainabledevelopment. 
Analisis pencemaran antropogenik dan struktur komunitas diatom planktonik sebagai indikator pencemaran perairan di Selat Air Hitam Miduk Tampubolon; Yusni Ikhwan Siregar; Sofyan Husein Siregar
Jurnal Zona Vol 1, No 2 (2017)
Publisher : Pelantar Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52364/jz.v1i2.8

Abstract

The present study aimed at identify population characters pollution source which affect water fertily nitrate, phospate, abundance as well as community structure of planctonic diatomae were measured. Nine sampling station of three location were established a long the Selat Air Hitam water. Appearently domestic activity, marine traffic, sago processing plant and community economic had affected on water fertility  due to effluent water that entered the water. Nitrate analysis showed a range of 187,5 to 262,5 µg/L mean while phospate consentration appear 28,8- 241,2 µg/L, silicate consentration appear 30,4-32,9 µg/L. Plactonic diatomae abundance came up 2400 to 3800 cell/L of nine genera. Biodiversity index of range  (1 kurang dari atau sama dengan H’ kurang dari atau sama dengan 3), while smiliarity index (0,5 kurang dari atau sama dengan E kurang dari atau sama dengan 1) and dominancy index (0,5 kurang dari atau sama dengan Ekurang dari atau sama dengan 1). Those index indicate nthe Selat Air Hitam waters in a medium pressure, however ecosystem condition is stable. Nitrate, phospate and silicate positively and significantly correlated with diatomae abundance ( p kurang dari 0,05). TSS level appeared 18,33 – 45,00 mg/l and BOD berkisar 3,73 – 5,07 mg/l. Regression analysis showed that nitrate and phospate had a mayor affect to diatomae abundance.
Co-Authors ', Thamrin ', Zulkifli AA Sudharmawan, AA Achmad Mulyadi Adam Dionfriski Ade Riccard Simatupang Adriana, Alysa Adrizal, Taufik Afrizal Tanjung Albahri Albahri Alvin Natali Andi Darlianto Anisaldi Anisaldi Anita, Sofia Antoni Antoni Aras Mulyadi Ardhi Yusuf Ardian Dwi Pratama Ardiansyah Hamid Arief Mubyarso Aslim Rasyad Asmika Harnalin Simarmata Bahri S, Aswan Bahtiar Denny Edison Belilasari Belilasari Belilasari, Belilasari Beranda, Ongki Okto Bintal Amin Bornok Silalahi Chairun Nisa Chitra Hermawan Chitra Hermawan Dalimunthe, Salmi Patima Dellarosa, Wiranda Deni Efizon Desmarina, Y. Despela, Despela Dessy Yoswati Dessy Yoswaty Devid Joehari Dewi Marni Dinda Trie K Hayati Dinda Trie K Hayati Dionfriski, Adam Dodik Ridho Nurrochmat Dudi Candra Eddy Handoko Edmond Edwar Efriyeldi, Efriyeldi Elda Nazriati Elizal, Elizal Endah Julita Eva Desy Yulina Siregar, Eva Desy Yulina Fainal Asandi Fairuzia, Putri Marwah Farid Febrianda Fathiya Hanifa Fauzan, M. Febbyolla, Selfi Anidal Febrianda, Farid Fery, Rony andes Gendraya Rohaini Ginting, T.B. Hamid, Ardiansyah Hanif, Naufal Happy Rosalina Hapsoh Hapsoh Hapzi Ali Henny Daniaty I Gusti Wayan Murjana Yasa Imam Suprayogi Ira Putra, Ira Irvina Nurachmi Jamhari Jamhari Jasril Jasril Joenathan Sarumpaet Joko Samiaji Josua Simanjuntak, Josua Lazuardi, Andika Lucky Rahman Lydia S Marpaung M. Hambali M. Hambali Manda Putra, Ridwan Marpauang, EkoRinaldi Masykur HZ Masykur Hz Megawati Hari Dwi Jayanti Mery Mery Mia Audina Mia Audina, Mia Miduk Tampubolon Mila Rosa Miswadi Miswadi Mubarak Mubarak Mubarak Mubarak Muchlis Muchlis Muchlis Muchlis Mudinillah, Adam Mufidah, Marhamah Nurul Muhammad Saroha Lubis Muhammad, Andi Syahroni Mumin Rifai Musrifin Galib Nickson Panjaitan Nila Sari Lubis Nizar Rofiki Nova Esterlita Novi Permata Sari Noviawati Riza Nugraha, Rafiq Prima Nur Arifin Nur Arifin, Nur Nurhapida Nurhapida Nurliya &#039; Octavia Lorensa Br Sinaga Prasiska, Yulia Puspita, Sarah Putri Wahyuni Rahmita, R. Ramadhan, A.R Rasoel Hamidy Renata, Vivien Ridwan Manda Putra Rifardi Rinaldo, Rinaldo Rinaldo, Rinaldo Rini, Yulia Sapta Riski Hambali Risqiana Dani Riza Yuliani Rizka Aprisanti Rizka Aprisanti Rizki, A. Rosa, Mila Rulen, Betty Nia Rusadi, M Dio Eigmar S.Pd. M Kes I Ketut Sudiana . Said Nazman Arif Samsir Samsir Sari, D.J. Selfi Anidal Febbyolla Selvia, Seli Shofian Nanda Adiprayoga Silaban, Santi Maria Sinaga, Octavia Lorensa Br Sirait, Juliper Parasian Sitindoan, Benni Mario K. Sofia Anita Sujianto Sujianto Sujianto Sukendi Sukendi Susiyanti. N Sutami Sutami Sutrisna Sutrisna suwondo suwondo Syafruddin Nasution Syafrudin Nasution Syahril Nedi Taufik Herman Thamrin Thamrin Thamrin Thamrin Thamrin Thamrin Thamrin Thamrin Thamrin Thamrin Trinop Sagiarti TRINOP SAGIARTI, TRINOP Trisla Warningsih Vivien Renata Wahyudi Wahyudi Wahyuni, Weni Indah Windarti Windarti Wiranda Dellarosa Yanasari, Nurry Yanti, D.H. Yosua Afrianus P Yudha Januarizki Setiawan Yulia Prasiska Yuliani, Riza Yusni Ikhwan Siregar Zahtamal Zahtamal Zientika, Zientika Zukarnaini Zukarnaini Zulfan Saam Zulkifli &#039; Zulkifli Zulkifli