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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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CONTENTS OF NITRATES, PHOSPHATES, SILICATES AND MISTAKES DIATOMS (Epiphytic) IN SEAGRASSES (Thalassia hemprichii) WATERS NIRWANA BEACH KECAMATAN TELUK NIBUNG KOTA PADANG SUMATERA BARAT PROVINCE Rambe, Sakinah Rachmadani; Nedi, Syahril; Nurrachmi, Irvina
Asian Journal of Aquatic Sciences Vol. 2 No. 1 (2019): April
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

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Abstract

Epiphytic diatoms are diatoms whose lives are associated with plants, one of which is seagrass. Nitrates, phosphates and silicates are needed to support growth and development, especially epiphytic which attaches to seagrass leaves. The research was conducted in May 2018 in the waters of Nirwana Beach, Teluk Nibung Subdistrict, Padang City, West Sumatra Province. The aim of this study was to determine the relationship of nitrate, phosphate, and silicate content to the abundance of diatoms. The method used in this study is the survey method. Taking diatom samples is done by grinding the surface of seagrass leaves using a brush, while sampling nitrates, phosphates and silicates is done using a water sampler. The results of this study indicate that nitrate concentrations ranged from 1,250-1,255 mg / l, phosphate 0,031-0,570 mg / l and silicate 1,180-1,700 mg/l. The total abundance of diatoms ranges from 459-3446 ind / cm2, where the diatom genus that dominates at each station is Navicula, Isthmia, and Stephanopyxis. Based on statistical analysis shows that the content of nitrate, phosphate, and silicate has a positive relationship to the abundance of epiphytic diatoms.
RELATIONSHIP OF ORGANIC MATERIAL WITH ABUNDANCE OF TOXIC BENTHIC DINOFLAGELLATA ON SEDIMENT IN WATERS OF TELUK BAKAU VILLAGE BINTAN REGENCY, RIAU ISLAND PROVINCE Afrizani, Syafrinaldi; Nurrachmi, Irvina; Effendi, Irwan
Asian Journal of Aquatic Sciences Vol. 2 No. 2 (2019): August
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

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Abstract

Dinoflagellata was included in one of microalgae groups which are on waters of the sea and the river, it can be found on detritus floats, sediments, and also swim freely. This research done on May – June 2018 at waters of the mangrove bay village, Bintan Regency, Riau Island Province. The aims of this research was to know relationship between organic material concentration toward abundance of toxic benthic dinoflagellata on sediment. In addition, to analyzed organic material concentratin and amount of abundance of toxic benthic dinoflagellata on sediment in waters of Teluk Bakau. The method used was survey method which is the location of sampling is done by pursosive sampling. Measurement of water quality sampling done at any point, the surface water temperature range 31-33oC, 28-31 ‰ salinity, pH 8-9 and the current speed from 0.045 to 0.051 m / det.Perairan predominantly sandy gravel sediments, making an average of organic materials ditemukn at each station is 0.027%, 0.043%, 0.033%, 0.024%. The result of this research found 3 genus of toxic dinoflagellata, which are Prorocentrum, Gambierdiscus, and Ostreopsis. Poisonous dinoflagelatta can produced a several types of toxic that found the sea. The highest of abundance found at station 2 on 75,615 sel/m2 and the lowest found at station 1 on 35,176 sel/m2. the results of simple linear regression analysis the relationship between the concentration of organic material with the abundance of dinoflagellates has a positive relationship with the regression equation y = 32,913 + 556,13x
ANNALYSIS OF Pb, Cu AND Zn METAL CONTENTS IN RED CHUT-CHUT SNAIL (Cerithidea obtusa) AND SEDIMENT IN MENDOL ISLAND KUALA KAMPAR OF RIAU PROVINCE Sumanti, Susi; Nurrachmi, Irvina; Siregar, Yusni Ikhwan
Asian Journal of Aquatic Sciences Vol. 2 No. 2 (2019): August
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

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Abstract

The study was conducted in July 2018. Sampling of sedut snails (Cerithidea obtusa) which was carried out in the waters of Mendol Island, Kuala Kampar District, Pelalawan Regency was aimed to determine the differences in the content of Pb, Cu and Zn between slugs and sediments and to know the consumption limits and the level of heavy metal pollution in the waters of Mendol Island. The method used in this study is the survey method. Sampling was determined using purposive sampling. The results of this study indicate the value of the metal content of Pb, Cu, and Zn in sedut snail highest at station 2, respectively: 9,2633 μg / g, 72,040 μg / g, 111,748 μg / g. Whereas for Pb, Cu, and Zn metals, the highest sediment was found at station 2, namely: 23.990 μg / g, 4.795 μg / g, 48.587 μg / g The results of linear regression analysis of Pb metal concentrations in snail meat showed negative results, and the concentration of Zn and Cu metals in snail meat showed positive results. namely Pb with a value of 14.1930 kg / week on Zn metal with a value of 111.7483 kg / week, while Cu metal at station 2 with a value of 72.0400 kg / week
EFFECT OF THE COMBINATION OF SALINITY AND WALNE FERTILIZER ON THE POPULATION GROWTH OF Nannochloropsis sp ON LABORATORY SCALE Aslam, Atthoriq Habib Harry; Nasution, Syafruddin; Nurrachmi, Irvina
Asian Journal of Aquatic Sciences Vol. 7 No. 2 (2024): August
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/ajoas.7.2.284-291

Abstract

ABSTRACT Activities of phytoplankton culture needed to be supported by physical and chemical parameters. This study aimed to analyze the effect of a combination of salinity and Walne fertilizer on the population growth of Nannochloropsis sp on the laboratory scale. The method used in this study is an experimental method using CRD (Completely Randomized Design) experimental design with 2 factors, namely salinity and Walne fertilizer, and each factor is given 3 levels of treatment. The level value of each factor is combined to obtain 9 combinations with 3 replications to obtain a total of 27 experimental units. The results of measuring the water quality parameters show that the media conditions were in good condition: an average temperature of 21℃, an average pH of 7.6, and the LED light used is ±2,000 lux. The results showed no significant effect of the combination of salinity and Walne fertilizer on the population growth of Nannochloropsis sp. The best combination value was obtained in the S1W1 treatment with a combination of 15 ppt salinity and 0.5 mL Walne fertilizer dose, resulting in cell population density (4125x103 cells/mL). The second best was obtained in the S1W2 combination with 15 ppt salinity and 1 mL Walne fertilizer dose (3775x103 cells/mL).
EFFECT OF ADDITION OF COCONUT WATER AS ENRICHMENT OF Spirulina platensis GROWTH MEDIA IN LABORATORY SCALE Khasena, Aisyah; Nurrachmi, Irvina; Zulkifli, Zulkifli
Asian Journal of Aquatic Sciences Vol. 6 No. 2 (2023): August
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/

Abstract

Spirulina platensis is a microalga that has high economic value. The growth of S.platensis is influenced by environmental conditions and nutrients. The objectives of this study are to determine the best concentration of coconut water for media of S.platensis growth. The study was conducted at the Natural Feed Laboratory of the Brackish Water Aquaculture Center (BPBAP) Ujung Batee Aceh. This research is an experimental study using a completely randomized design (CRD) consisting of 3 levels of treatment and control using coconut water of the media with concentrations of 3%, 5%, and 7% with 3 replications. The highest cell density level of S.platensis reached 83.102 cells/ml in treatment A (3%), in treatment B (5%) 73.975 cells/ml, the density in the control treatment reached 70.850 cells/ml, and in treatment, C (7%) cell density only reached 54.658 cells/ml. The results of the ANOVA test on day 2, day 3, day 5, and day 6 showed that the addition of coconut water with different concentrations had a significant effect (p<0.05) on the growth of S.platensis.
CORAL REEF COVER RELATIONSHIP TO POMACENTRIDAE AND PHYTOPLANKTON CORAL FISH IN KASIAK ISLAND OF WEST SUMATRA PROVINCE Sitohang, Margaretha Sri Ulina; Nurrachmi, Irvina; Thamrin, Thamrin
Asian Journal of Aquatic Sciences Vol. 4 No. 2 (2021): August
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/

Abstract

Kasiak Island is one of the islands located in the waters of Pariaman, West Sumatra, and located right in front of Pariaman City. Around the sea, the island is surrounded by coral reefs and is a protected area. In the aquatic area of Kasiak Island has never been conducted research on the relationship of coral reef cover to the coral Pomacentridae and phytoplankton. Therefore, it is necessary to conduct research on this matter in the waters of Kasiak Island, West Sumatra Province. Data collection of coral reef cover is done by the LIT (Line Intercept transect) method with a transect length of 50 meters at a depth of 5 meters using scuba equipment. Coral fish observation is done by UVC (Underwater Visual Census) method with a transect length of 50 meters and an observation area of 2.5 meters left and right at a depth of 5 meters. Phytoplankton sampling is conducted during the day at 11.00 to 15.00 WIB at five points of the station with a depth of 5 meters using Vandorn water sampler volume 2 L with a total take of 100 L, then filtered using Plankton net no 25 and inserted into a sample bottle of 125 ml, then preserved using Lugol 4% as much as 4-6 drops, after which analyzed in the laboratory. Based on the results there is a very strong relationship between coral cover to the abundance of coral fish, where coral cover contributes to the abundance of coral fish by 93.87%, which means that the higher the percentage of coral cover the more species and abundance of coral fish are found. Then the a strong relationship between coral reef cover and phytoplankton abundance, where coral reef cover contributes to the abundance of phytoplankton by 56.37%, which means an increase in the percentage of coral reef cover along with the increasing abundance of phytoplankton.
ANALYSIS CONCENTRATION OF SURFACTANT ANIONIC AND THE RELATION WITH DIATOM ABUNDANCE IN BUNGUS WATER, PADANG WEST SUMATERA Putri, Rukiana Audi; Nedi, Syahril; Nurrachmi, Irvina
Asian Journal of Aquatic Sciences Vol. 3 No. 1 (2020): April
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/

Abstract

This research aims to analyze surfactant anionic concentration and diatom abundance that has been implemented at May 2018 in Bungus rivers, Padang. This Research were conducted in survey method, four station were eshtablished with three replication of each sampling station. Analysis of surfactant anionic and diatom content was done at Chemistry Oceanography Laboratory and diatom identification was performed at Biology Oceanography Laboratory. The results showed that surfactant content in the waters ranged from 0,309-0,773 ppm and diatom abundance based on laboratory test on ranged 40,7407-81,4815 Ind/l. The correlation of surfactant and diatom content in waters by using linear regression y = Y = 94.56 -66.8x with correlation coefficient r = 0,809 and correlation water quality parameters with diatom abundance by using multiple linear regression Y= 787,189 -238,828X1 -9,032X2 -6,185X3 +5,371X4 +303,081X5 -35,631X6 with determination regression 0,995 and correlation coefficient r = 0,997.
EFFECT OF PARTICLE SIZES AND CONTENT OF ORGANIC MATTER SEDIMENT ON EPIPELIC DIATOM ABUNDANCE IN BAYUR BAY WATERS OF WEST SUMATERA Sitindoan, Benni Mario K.; Siregar, Sofyan Husein; Nurrachmi, Irvina
Asian Journal of Aquatic Sciences Vol. 3 No. 1 (2020): April
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/

Abstract

The aim of this study is to determine the water quality, the particle size (mm) and the organic matter content sediment, the type and abundance of epipelic diatoms, and the effect of particle size and organic matter content of the sediment on the abundance of epipelic diatoms at Bayur Bay Waters. This study was conducted in June - July 2019. The survey method was applied in this study and sampling location determine by purposive sampling. The resullt of measurement of water quality parameter ranged salinity 29 ‰ - 34 ‰, pH 7-8, current speed of 0,10 m/s – 0,53 m/s, temperature 30,330C - 31,670C. The sediment types are grouped into four types, namely gravel, sandy gravel, gravelly sand, and sand. The average of particle size (Mz) ranged -1,37 Ø - 0,80 Ø. The organic matter on sediment ranged 2,46% -6,36%. Eleven species of epipelic diatoms was recorded namely Amphora sp, Cocconeis sp, Diploineis sp, Halamphora sp, Melosira sp, Navicula sp, Nitzschia sp, Pinnularia sp, Stephanodiscus sp, Isthmia sp and Synedra sp. The average value of abundance range 2.836 – 10.812 ind/cm2. Epipelik diatom abundance was not significantly different between the stations. The effect of sediment particle size on the abundance of epipelic diatoms by 34,37%. The effect of content of organic matter sediment on abundance of epipelic diatoms in Bayur Bay Waters by 51,78%.
ANALYSIS OF NITRATE CONCENTRATION, PHOSPHATE AND SILICATE RELATIONSHIP WITH THE ABUNDANCE OF PLANKTONIC DIATOMS IN MERAL WATERS, KARIMUN DISTRICT Rozalina, Rozalina; Nedi, Syahril; Nurrachmi, Irvina
Asian Journal of Aquatic Sciences Vol. 3 No. 1 (2020): April
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/

Abstract

Input of nutrients into the waters from various human activities (residential and industry) has the potential to cause changes in the physical, chemical and biological conditions of the waters. The study aims to determine the relationship of concentrations of nitrate, phosphate and silicate with the abundance of diatoms in the Meral waters. The method used is the survey method, the determination of the location of sampling is done by purposive sampling, data analysis (multiple regression). Based in the results of laboratory analysis nitrate concentrations ranged from 0,033 – 0,051mg/l, the phosphate concentration ranged from 0,076 – 0,086 mg/l, and silicate concentration ranged from 0,043 – 0,052 mg/l. The abundance of diatoms in Tanjung Tiram waters ranged from 90,3 – 208,3 ind/l. The results of statistical analysis of the relationship of nitrate, phosphate and silicate with the abundance of diatoms are expressed in terms of equation y = 58,460 + 904,562Nitrate – 251,562phosphate + 1573,489Silicate. This statement explains the concentration of nitrate, silicate positive (+) to the abundance of diatoms and phosphate related negative (-) to the abundance of diatoms. This condition shows that the nutrient concentration in these waters is relatively high so that it affects the abundance of diatoms.
EFFECT OF UREA CONCENTRATION ON THE GROWTH OF CELLS OF Nannochloropsis sp. LABORATORY SCALE Wahyuni, Indri; Nurrachmi, Irvina; Nursyirwani, Nursyirwani
Asian Journal of Aquatic Sciences Vol. 6 No. 3 (2023): December
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/

Abstract

ABSTRACT This research was conducted from October 2021 to January 2022 in the Natural Feed Laboratory of the Brackish Water Cultivation Fisheries Center (BPBAP) Ujung Batee, Aceh. This study aimed to determine whether urea has an effect and the best urea concentration on the growth of Nannochloropsis sp. This study used an experimental method with one-factor RAL (Completely Randomised Design), consisting of 4 levels of treatment and control with three replications so that 15 experimental units were obtained. The treatments tested were the uses of urea 40 ppm (treatment A), urea 60 ppm (treatment B), urea 80 ppm (treatment C), urea 100 ppm (treatment D), and Walne 1 ml (control). The population density of Nannochlropsis sp. was found in treatment D on day 4 (2414 x 104 cells/mL), and the lowest population growth was shown in treatment A (1177 x 104 cells/mL). The highest absolute growth rate occurred in treatment D (2229x 104 cells/mL), while the highest relative growth rate occurred in treatment D (1205%), and the highest specific growth rate occurred in treatment B (79% per day).
Co-Authors ', Intan ', Jamalus AA Sudharmawan, AA Abdullah &#039; Adam Dionfriski Adani Fatahilal Arifin Ade Mulyana Aden, Aden Adi Maulana Adrizal, Taufik Afriansyah, M. Afrizal Tanjung Afrizam &#039; 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 Ardi Gustri Purbata 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 Clara Yolandika 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 Kambaren, Bella Billiant J Ananta Khaironisa, Riska Khairunnisa Khairunnisa Khasena, Aisyah Kusnadi, Yudi Lie Othman 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 &#039; 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 Nabila Afifah Azuga 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 Pradini, Ulfa Rizki Pratama, Farrel Prayitno, Betari Erlinda Priyono, Franciscus Edi Putra &#039; Putra, Dhiga Kurnia Ananda Putra, Rajiv R. Putri Andini, Putri Putri Maharani Putri, Dinda Maharani Putri, Nadila Putri, Rianti Putri, Rukiana Audi Putri, Zulherija Rafsyanjani M, Ridwan Rahayunigtyas, Putri 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 &#039; 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 &#039; 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 &#039; 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 &#039; Zulkifli Zulkifli