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All Journal Maspari Journal Jurnal Perikanan dan Kelautan Berkala Perikanan Terubuk Jurnal Ilmu Lingkungan Jurnal Ilmu Perairan (Aquatic Science) Maspari Journal Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Indonesian Journal Of Environmental Science and Technology Squalen Bulletin of Marine and Fisheries Postharvest and Biotechnology Asian Journal of Aquatic Sciences Unri Conference Series: Community Engagement Jurnal Zona Journal of Coastal and Ocean Sciences Journal of Rural and Urban Community Empowerment Jurnal Perikanan dan Kelautan Tropical Marine Environmental Sciences Jurnal Natur Indonesia
Irvina Nurachmi
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Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Earth & Planetary Sciences Education Energy Environmental Science Immunology & microbiology Materials Science & Nanotechnology Physics Social Sciences

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Relationship between Concentration of Nitrate, Phosphate, and Silicate with Abundance of Diatom Aroundthe Waters of Tapian Nauli North Sumatera Province Windarti Nofriyan Nengsih; Irvina Nurrachmi; Thamrin '
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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Abstract

This research was conducted from January to February 2015 in the coastal waters of Tapian Nauli, North Sumatera Province. The samples were analyzed in the Laboratory of Marine Chemistry of Marine Science Department, University of Riau. The research aimed to determine the relationship between nutrients (nitrate, phosphate and silicate) with abundance of diatoms. This research used survey method and the file were analyzed by using linear regression analysis. The results showed concentrations of nitrate ranged 1.18 to 1.27 mg/l, phosphate 0.04 to 0.35 mg/l, and silicate 0.46 to 0.48 mg/l. The diatoms found during the research were consisting 13 species. The highest abundance of diatoms was recorded in the station III (48080 ind/l), and the lowest was in the station I (1314 ind/l). Relationship between concentration of nitrate, phosphate and silicate with the abundance of diatoms showed a weak connection.Keywords: Nitrate, Phospate, Silicate, Diatom, Tapian Nauli
ANALYSIS STRUCTURE OF EPILITHIC DIATOMS COMMUNITY IN COASTAL WATERS OF DUMAI RIAU PROVINCE Gustini Sri Ulina; Sofyan H. Siregar; Irvina Nurrachmi
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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This research was conducted in June 2015 in the coastal waters of Dumai RiauProvince. This study observed the variety, abundance and community structure ofepilithic diatoms contained in coastal waters and to inform about the ecology of aquaticenvironment. The epilithic diatoms sample were collected in the field and identified inthe Marine Biological Laboratory of Marine Science Department, Faculty of Fisheriesand Marine Sciences, University of Riau. The number of genus recorded were 8 genera,namely Cymatopleura, Dactyliosolen, Leptocylindrus, Nitzschia, Rhabdonema,Rhizosolenia, Thallassiothrix and Triceratium. Epilithic diatoms genus found in eachstation was Rhabdonema. The genus can be bound or attached to rocks because it has acosmopolitan nature in which not susceptible to flow. The values of diversity index (H'), dominance (D) and diversity (E) indicated that the condition of coastal waters Dumaiunder pressure and moderate pollution levels, no diatoms dominated, uniformitybalanced and no competition of food and places. Based on the calculation of theabundance of diatom ANOVA test did not differ significantly between stations.Keywords: coastal waters, Dumai, diatoms, epilithic
PHYTOPLANKTON COMMUNITY STRUCTURE POTENTIALLY ASHARMFUL ALGAL BLOOM (HAB) IN THE WATERS OF PARIAMAN CITY Nila Sari Lubis; Sofyan Husein Siregar; Irvina Nurrachmi
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 This research was conducted in Januari 2019 in the waters of Pariaman City. The  purposeof  this  researchwastodeterminethewatersquality, composition, abundance, the structure of phytoplankton community, and to know the correlation (nitrate and phosphate) with the  abundance of phytoplankton  potentially as HAB in Pariaman City waters. This research using a survey method. Location is determined by purposive sampling.The Results of measurements of waters quality parametersshow that temperature29,50-30,75 0C, current speed 0,01-0,07 m/s, brightness 0,86-1,50 m, salinity 28,50-30,50 ppt, pH 7,25-7,50, nitrate concentration 0,0672-0,1010 mg/l andphosphate0,0248-0,0343 mg/l.Totaltypes of phytoplanktonwhich was found 29 species namelyThalassionema sp, Rhizosolenia sp, Pleurosigma sp, Chaetoceros sp, Nitzschia sp, Thalassiosira sp, Lauderia sp, Thalassiothrix sp, Coscinodiscus sp, Bacteriastrum sp, Hemiaulus sp, Guinardia sp, Bacillaria sp, Tabellaria sp, Ceratium sp, Triceratium sp, Pseudo-nitzschia sp, Fragilaria sp, Campylodiscus sp,Ditylum sp, Pyrophacus sp, Pyrocystis sp, Amphisolenia sp, Dinophysis sp, Oscillatoria sp, Trichodesmium sp, Rivularia sp, Licmophora sp, Dictyocha sp. The result of diversity index is 3,37-3,68, dominance indexis 0,11-0,13 anduniformity indexis 0,73-0,77. The average value of phytoplanktonis 68,75x103-190,2x103 sel/m3, that cause the potential for HAB in Pariaman City waters isvery small.The relative abundance of phytoplankton types the potentialHAB isThalassionema sp. The results of linear regression analysisproduce a positive linear relationship with the equation y = 28,905+1388,8x (Nitrate) y = 34,758+3553,5x (phosphate) and the strength of the relationship is classified as strong. Keyword :Phytoplankton, HAB (Harmful Algal Bloom), Abundance, Pariaman
THE RELATHIONSHIP OF NITRATE, PHOSPHATE AND SILICATE CONCENTRATION WITH PLANKTONIC DIATOMS ABUNDANCE IN TELUK BUO WATERS BUNGUS TELUK KABUNG DISTRICT PADANGCITY WEST SUMATERA Syawfy Luthfiandra; Irvina Nurrachmi; Efriyeldi Efriyeldi
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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ABSTRACT                The aims of study was to analyze the relationship of planktonic diatoms  abundance with the concentration of nitrate, phosphate and silicate from the Teluk Buoof waters. Placement of sampling location using purposive sampling that was by dividing the research location into four station with 3 point of sampling at each station in Teluk Buo waters which serve as research location. Field sampling was conducted in March 2018 and the observation and identification of planktonic diatoms were conducted in Marine Biology Laboratory of the Fisheries and Marine Faculty of Riau University. The results showed that nitrate concentration in Teluk Buo waters ranged from 0.0125 - 0.0333 mg/l, phosphate concentration ranged from 0.0413 - 0.0841 mg/l,and  silicate concentrations ranged from 0.0228 - 0.0354 mg/l. Nine species of plantonic diatoms were finded in Teluk Buo of waterswasBiddulphia sp, Isthimisp, Coscinodiscus sp, Flagilaria sp, Nitzschia sp, Navicula sp, Aulacoseira sp, Bacillaria sp, dan Cymbella sp. The average abundance of diatoms in these waters 181-250 ind/l. Regression test results, nitrate correlation value with diatomic abundance shows a relationshipwas positive, while the value of phosphate and silicate correlation with diatomic abundance shows a relationshipwas negative.           Key word : Planktonic Diatoms, Nitrate, Phosphate and Silicate, Teluk Buo Waters
ANALYSIS OF BIOMASS AND CARBON STOCK ON MANGROVE FOREST ECOSYTEM THE TELUK PULAI, VILLAGE OF PASIR LIMAU KAPAS, ROKAN HILIR RIAU PROVINCE Muhammad Syarif; Irvina Nurrachmi; Efriyeldi '
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 4, No 1 (2017): Wisuda Februari Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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Abstract

This research was conducted in April 2016. Sampling was conducted on mangrove forest ecosystems in Teluk Pulai Pasir Limau Kapas Rokan Hilir in Riau Province. The purpose of the research is to analyze the content of carbon in mangrove forest ecosystems as well as to determine the ability to these ecosystems to store carbon per unit area of mangrove forest area in the village of Teluk Pulai. The method used in this study is a survey method, which observation and sampling on the field and do the samples analyzed in the laboratory. Based on the average yield of total biomass of mangrove highest at station 1 is 198.58 ton/ha while the lowest was at station 3 is 68.80 tons/ha. The average yield of total carbon stocks are highest in station 1 with a value of 300.31 tons/ha while the total carbon stock was lowest for the station 3 with a value of 222.74 tons/ha.Keyword: Teluk Pulai, Mangrove, Biomass, Carbon
Toxicity of Eucheuma cottonii seaweed extract with Methanol and N-Hexane solvents for Artemia salina larvae Zakaria Kaharudin; Irvina Nurrachmi; Efriyeldi Efriyeldi
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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Abstract Seaweeds are very popular in the world of commerce, in science known as algae. Algae consists of four classes: Rhodophyceae (Red Algae), Phaeophyceae (Brown Algae), Chlorophyceae (Green Algae), and Cyanophyceae (Green-blue algae). Seaweed contains secondary metabolite compounds in the form of alkaloids or flavonoids that are useful as medicines and other purposes such as cosmetics and other industries. Seaweed is known to be rich in essential nutrients, such as enzymes, nucleic acids, amino acids, minerals, trace elements and vitamins A, B, C, D, E and K so it is also known as traditional medicine for cough, asthma, bronchitis, tuberculosis, abdominal pain, fever and rheumatism. This research was conducted in February - March 2018 in Sugie Village, Karimun Regency, Riau Islands Province, which aims to produce seaweed extract E. cottonii using Methanol and N-Hexane solvent and knowing LC50 value of Seaweed extract E. cottonii. Data were obtained by using BSLT (Brine Shrimp Lethality Test) method. The results of the study showed that the extract obtained from 5 kg of seaweed (wet weight) as much as 513 mL of concentrated extract. Seaweed extract with type E. cottonii was toxic to test animal A. salina. The LC50 value of E. cottonii extract dissolved in methanol was 40.2438 ppm.Keywords: toxicity, Extract of Seaweed, Desa Sugi 
SEDIMENT CHARACTERISTIC AND DISTRIBUTION PATTERN OF WESTERN COAST OF RUPAT STRAIT Afrizam '; Rifardi '; Irvina Nurrachmi
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 2, No 1 (2015): Wisuda Februari Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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Abstract This research was conducted in May 2014 in the western part of the Rupat strait. The aim of study was to describe the condition of depositional environments in the western part of the Rupat strait. Determination of sampling points done by using purposive sampling method, taking into account the tidal patterns and source of sedimentary material that goes into the waters. The western part of Strait Rupat divided into 12 sampling points. Surface sediments was taken using a grab sampler at all sampling points. Sediment samples were analyzed by using the method of mechanical analysis and the data obtained were processed with analisis. Cluster analysis showed that the study area was divided into three groups (clusters), namely Group I is at the southern and northern of the study area, this area is characterized the strength of the flow of sediment transport the strongest and most stable compared with other groups. Group II was on the edge of the island of Sumatra and Rupat the middle toward the North, this is a transition region between groups I and II were characterized by flow force weaker and more fragile than the first group, but stronger and more stable than group III. Group III were at the edge of the Strait Rupat and Rupat, this area is characterized by the flow of sediment transport the weakest and most unstable compared to other groups.Keyword : Sediment, Characteristics, Distribution Pattern, Rupat Strait
Epipelic Diatom Community Structure in the Intertidal Zone Mengkapan Waters, Sungai Apit District, Siak Regency Adam Dionfriski; Sofyan Husein Siregar; Irvina Nurrachmi
Journal of Coastal and Ocean Sciences Vol. 2 No. 3 (2021): September
Publisher : Ilmu Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jocos.2.3.207-216

Abstract

This research was conducted in December 2020 in Mengkapan Waters, Sungai Apit District, Siak Regency. The aims of this research was to analyze the composition, abundance, diversity index, uniformity index, and dominance index of epipelic diatom species in the intertidal zone. The method used is a survey method and the determination of the sampling location by purposive sampling based on anthropogenic activities around the waters. The water quality measured in this study were brightness, temperature, current velocity, salinity, pH, nitrate, and phosphate. Based on the research results, there are 19 species epipelic diatoms found in Mengkapan Waters, namely Coscinodiscus sp., Navicula sp., Gyrosigma sp., Thalassiosira sp., Pleurosigma sp., Synedra sp., Pinnularia sp., Surirella sp., Nitzchia sp., Triceratium sp., Melosira sp., Skeletonema sp., Stephanodiscus sp., Oscillatoria sp., Cocconeis sp., Epithemia sp., Diadesmis sp., Cymbella sp., and Amphipleura sp. The average value of abundance ranged from 29,245.37 – 35,744.33 ind/cm2, the diversity index value ranged from 2.5909 to 2.8014, the uniformity index value ranged from 0.6736 – 0.7755, and the dominance index ranged from 0.1684 - 0.2064. Based on one-way Anova test, concluded that abundance of epipelic diatoms between each stations weren’t significant.
Pemberdayaan masyarakat melalui alih teknologi pembuatan makanan tambahan berbahan baku konsentrat protein ikan di Pulau Cawan Indragiri Hilir Bintal Amin; Dewita Dewita; Dessy Yoswaty; Irvina Nurrachmi
Unri Conference Series: Community Engagement Vol 1 (2019): Seminar Nasional Pemberdayaan Masyarakat
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/unricsce.1.121-125

Abstract

The devotion to the community of Pulau Cawan in Indragiri Hilir Regency carried out in the form of counseling and training which generally aimed at making the community, (especially the cadres of Family Welfare Empowerment or PKK), acquire skills in processing fishbased food and creating new independent businesses. The use and development of Pulau Cawan as an ecotourism area needs to be followed by activities that can improve the welfare of the surrounding community. With the opening of new jobs, it is ultimately expected to improve family welfare. Through this extension and training activities, it is hoped that when fish catch and production abundant or fish prices are falling, it can be saved by processing them into various processed products made from fish, especially snacks and cookies which are of high economic value and nutritious. The results of the activities received good reception and appreciation from the local community, the PKK cadres and Pulau Cawan Headmaster. All the participants confidently will empower their groups to create and start to open businesses in making these fish-based food products. The Head of Department of Maritime Affairs and Fisheries even promised to provide wider assistance for the development of the product, including its marketing.
Hubungan kondisi tutupan terumbu karang dengan kepadatan megabentos di perairan Pulau Talam Kabupaten Tapanuli Tengah Provinsi Sumatera Utara Alfeus Jhonson Armada H; Thamrin Thamrin; Irvina Nurrachmi
Jurnal Zona Vol 6, No 2 (2022)
Publisher : Pelantar Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52364/zona.v6i2.64

Abstract

This research was conducted in March 2022 in the waters of Talam Island, Central Tapanuli Regency, North Sumatra Province. This study aims to determine the relationship between coral cover and the density of megabenthos in the Talam Island area. The method used in this research is a survey method. Coral cover data were collected using the LIT (Line Intercept Transect) method and megabenthos data were collected using the BBT (Benthos Belt Transect) method. Observations were made at three station points with each station with a depth of 4 meters, 6 meters and 8 meters. The results showed that Talam Island had a good percentage of coral cover with an average of 54.74%. The highest density of megabenthos was Tridacninae found at each station, while the lowest density was Acanthaster planci. The overall megabenthos density has an average of 10.033 ind/ha. Coral reef cover relationship has an influence on the density of megabenthos, there is a strong positive effect on economic megabenthos and a strong negative on non-economic megabenthos.
Co-Authors ', Intan ', Jamalus AA Sudharmawan, AA Abdullah ' Adam Dionfriski Adani Fatahilal Arifin Ade Mulyana Aden, Aden Adi Maulana Adrizal, Taufik Afriansyah, M. Afrizal Tanjung Afrizam ' Afrizani, Syafrinaldi Agustinus Robert Uria Albukhori, Mustaqim Alfeus Jhonson Armada H Alghani, Muhammad Roif Alqoriffah Hasanah Anadri, Rifqi Rafif Andini, Dilla Andre Thessalonians Marpaung ani ani Aras Mulyadi Arbianti, Purnama Areza Maulana Arifin, Adani Fatahilal Aritonang, Simon Hasintongan Aryanti, Nisa Aslam, Atthoriq Habib Harry Bestari, Bismi Yanda Putri Bintal Amin Bintang Rapshodio Tane Biotal Amin, Biotal Dameria, Gabriella Darmawan, Ernanda P. Dellarosa, Wiranda Dessy Yoswaty Dewi Seswita Zilda Dewita Dewita Dewita Dewita Dharma Eka Putra Dilla Andini Dionfriski, Adam Dodik Febriyantoro, Dodik Dwi Hindarti, Dwi Dwi Putri Pratiwi Dyonisius Hutauruk Efriyeldi, Efriyeldi Eka Puspa Sari Elizal, Elizal Esra Waty Fadel Fadel Fadillah, Yuda Fathurrahman, Febri Fatma, Nisa Tria Fatmanita Fatmanita Fatmanita, Fatmanita Febbyolla, Selfi Anidal Febeyessy Aritonang Febri Naldi Feffiana M Amin Feliatra Feliatra, Feli Ferdi, Aidil Fitriani, Ersa Fitriansah, Heru Ghifari, Muhammad Fadil Gregorius Agung Gustini Sri Ulina Hanifa, Zurya Hardiko, Syefri Haura, Sari R. Al Hazmi, Arief Ilham Ilahi Indri Wahyuni Irwan Effendi Irwan Irwan Islamiati, Bening Izzati, Salsabila Jefri Affandi Jewlaika, Lady Joenathan Sarumpaet Joko Samiaji Jonter Sitepu Kaharudin, Zakaria Khaironisa, Riska Khairunnisa Khairunnisa Khasena, Aisyah Kusnadi, Yudi M, Ridwan Rafsyanjani. Maharani, Tasya Putri Mahmudah, Dewi A. Manik, Mei Suyanti Masjudi, Heri Merry Sintya Dewi Michael Prawira, Michael Mikael H Dolok Saribu Mila Rosa Mubarak ' Mubarak Mubarak Mudinillah, Adam Muhammad Aliv Kusuma Putra Muhammad Amien Muhammad Hafizh Muhammad Irfan Muhammad Nudi Habibi Muhammad Nudi Habibi Muhammad Syarif Musrifin Galib Musrifin Ghalib Nababan, Sumiati Friesledi Naldi, Febri Nickson Panjaitan Nila Sari Lubis Nugraha, Rafiq Nugraha, Rafiq Prima Nur Arifin, Nur Nurfalah, Risna Nursyirwani, Nursyirwani Nurul Abdiah Nasution Nurvana, Resti Panggabean, Salmi Engriani Permatasari, Mutiara Indah Pratama, Farrel Prayitno, Betari Erlinda Priyono, Franciscus Edi Putra ' Putra, Rajiv R. Putri Andini, Putri Putri Maharani Putri, Dinda Maharani Putri, Nadila Putri, Rukiana Audi Putri, Zulherija Rafsyanjani M, Ridwan Rahman, Nanda Rahmat Hidayat Ramadhan, Ragiel Ramadhoni, Aulia Zahro Rambe, Sakinah Rachmadani Ridhawani, Fiki Rifardi Riska Khaironisa Rizki Hamdani Rizki, Sofia Wanda Rosa, Mila Rozali ' Rozalina, Rozalina Rozalina S.Pd. M Kes I Ketut Sudiana . Sari, Lita Sari, Natalia Widya Savita, Dinda Selfi Anidal Febbyolla Selvia, Seli Sembiring, Herbin Shandy, Jacinda Qoidatun Shelviyanti, Nabila Sianturi, Yuli Rona Tamaria Sihaloho, Elpon Sinaga, Cindy Novitasari Sinaga, Merisa Debora Sinaga, Rimansius Siregar, Meiyanto Siregar, Sofyan Siti Nursubadriah Sitindaon, Dionisius Rahmat Martin Sitindoan, Benni Mario K. Sitohang, Margaretha Sitohang, Margaretha Sri Ulina Sofyan H. Siregar Sofyan Husein Siregar Sri Dewi Lestari, Sri Dewi Sufaidah, Siti Nur Sumanti, Susi Sumiati Friesledi Nababan Susiyanti. N Suzila ' Syafrizal Syafrizal Syafruddin Nasution Syahada, Melania Syahputra, Vico Andrian Syahril Nedi Syahrul Syahrul Syawfy Luthfiandra Syukri Fajar Tampubolon, Theresia Tane, Bintang Rapshodio Tantri, Ristamulia Tengku Rahma Lopi Thamrin ' Thamrin Thamrin Thamrin Thamrin Tri A Hadi Utami, Rahma I. Verid Aria Susammesin, Verid Aria Waidia Dipeta Ym Windarti Nofriyan Nengsih Wiranda Dellarosa Yasir Muammar Lubis Yunus, Budi Andri Yurestira, Ilham Yusni Ikhwan Yusni Ikhwan Siregar Zakaria Kaharudin Zaki, Raihan Zulkifli ' Zulkifli Zulkifli