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Asmika Harnalin Simarmata
Dosen Pengajar Jurusan Manajemen Sumberdaya Perairan Fakultas Perikanan Dan Ilmu Kelautan Universitas Riau
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Energy Environmental Science Immunology & microbiology Materials Science & Nanotechnology Physics Social Sciences

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Trophic State of The Sepinang Lake, Pangakalan Serik Village, Kampar Distric, Riau Province, Based on Nygaard Index. Esmi Yanti br Sinaga; Madju Siagian; Asmika H Simarmata
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             Nygard Index can be used to determine the trophic state of waters. Calculation of this index is based on the number of phytoplankton species that are belonged to these following groups, namely Chlorococcales, Euglenophyceae, Centric diatom, Myxophyceae and Desmidiaceae. To understand the trophic state of the Sepinang Lake, a research has been conducted  on March – April 2018. There were 3 sampling points, namely in the inlet, in the middle of the lake and in the end of the lake. In each sampling point, water samplet from the  surface and 2 secchi depth. Sampling was done three times, once/week. Water quality parameters measured were phytoplankton, transparency, temperature, pH, nitrate, phosphate, Disolved oxygen and free carbondioxide. Results shown that there were 48 species of phytoplankton present, namely Desmidiaceae (10 species), Euglenophyceae (10 species), Chlorococcales order (14 species), Centric Diatom (5 species), and Class Mixophyceae (1 species). The water quality parameters were as follows: transparency49,3-63 cm, temperature 30,6–32,00;, pH 5.33-5.53, nitrate 0,08-0,17 mg/L, phosphate 0,10-0,18 mg/L, dissolved oxygen 4,63-5,04 mg/L, free carbon dioxide 11.32-13.32 mg/L. Nygaard Index value of the Sepinang Lake was 1.8-2.5, indicates that the Sepinang Lake is mesotrophic to eutrophic. Keywords : Oxbow Lake, Phytoplankton, Mesotrophic, Eutrophic.
Jenis dan Kelimpahan Fitoplankton di Waduk Sungai Paku Kecamatan Kampar Kiri Kabupaten Kampar Provinsi Riau Yuris Fiestaria Naibaho; ’Tengku Dahril; Asmika Harnalin Simarmata
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 7, No 2 (2020): 2 Juli - Desember 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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AbstractPhytoplankton is a primary producer organism in aquatic ecosystem and it supplies oxygen to the waters through photosynthesis process. A research aim to determine types and abundance of phytoplankton in the Sungai Paku Reservoir has been carried out on June-July 2019. Sampling taken at three stations, namely Station 1 (riverine zone), Station 2 (transition zone) and Station 3 (lacustrine zone), once/week. Parameters measured were temperature, transparency, depth, pH, DO, free CO2, nitrate (NO3) and phosphate (PO4). Result shown the types of phytoplankton found in the Sungai Paku Reservoir was 35 species that consist of 5 classes, namely Bacillariophyceae (5 species), Chlorophyceae (18 species), Cyanophyceae (7 species), Dinophyceae (2 species), and Euglenophyceae (3 species) and abudance of phytoplankton in the Sungai Paku Reservoir ranges from 78,336-182,016 cells/L. The water quality parameters were as follows: transparency 69.2-80.8 cm, temperature: 28.77-29.43 oC, pH 5, DO 3.53-4.42 mg/L, free CO2 10.56-11.44 mg/L, phosphate 0.077-0.111 mg/L, nitrate 0.085-0.109 mg/L. Based on phytoplankton abundance, Sungai Paku Reservoir can be categorized as mesotrophic. Keywords: Autotroph, Water Quality Parameters, Mesotrophic 
Types and Abundance of Periphyton on Ceramics Substrate Placed in the Parit Belanda River, Rumbai Pesisir District, Pekanbaru City, Riau Eka Dwinata Nopitasari; Asmika Harnalin Simarmata; Clemens Sihotang
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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Periphyton is a sessile microscopic organisms that are able to attach in some natural subsrates such as rocks, woods, plants and aquatic animals. Research aims to determine the type and abundance of periphyton attached in ceramic substrats in the Parit Belanda River has been carried out in March-April 2016. There were 2 types of ceramics used, the rough surfaced ceramics and smooth surfaced ceramics. There were three stations namely station 1 (in the up stream), station 2 (in the middle of the stream), and station 3 (in the down stream). Samplings were conducted once/week for a 4 weeks period. The periphyton samples were brushed from the ceramic surface (8 cm x 3 cm). Type of periphyton were identified based on Bigg and Killroy (2000), Yunfang (1995), and Presscot (1974). Result shown that there were 63 types of phytoperiphyton present, they were belonged to 5 classes, namely Bacillariophyceae (13 species), Chlorophyceae (10 species), Chrysophyceae (2 species), Cyanophyceae (7 species) Dinophyceae (2 spesies) and zooperiphyton are belonged to 7 classes, namely Cilliate (2 species), Euglenophyta (5 species), Monogononta (11 spesies), Oligotrichia (2 spesies), Protozoa (2 spesies), Rhizopoda (2 species) and Rotatoria (2 species). The abundance of phytoperiphyton attached in the rough surfaced ceramic was 62,370-82,470 cells/cm2 and the zooperipyton was 9,080-53,220 organisms/cm2. While in the smooth surfaced ceramic was 80,200-101,550 cells/cm2 and the zooperiphyton was 16,720-64,320 organisms/cm2. Based on the composition of periphyton, it can be concluded that the Parit Belanda River can be categorized as eutrophic.Keywords: Parit Belanda River, Periphyton, Rough surfaced ceramic and Smooth surfaced ceramics
The Trophic Status of Bandar Kayangan Reservoir Lembah SariRumbai Pesisir Sub District Pekanbaru City Province Riau Based on Phytoplankton Abundance Tri Wahyudi; Tengku Dahril; Asmika H. Simarmata
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 Trophic Status shows the level of water fertility that can be measured from nutrient, transparency and other biological activities that occur in a body of water. The study has been conducted December - January 2019.This study aims to determine the trophic status of the reservoir based on the type and phytoplankton abundance. There were 4 station, namely Station 1 in  Ambang river (station 1), and merbau river (station 2), station 3 in zone transition and station 4 in zone lacustrine. Samples were carried out 3 time with one weak interval. The quality of water parameters is temperature, transparency, depth, acidity (pH), dissolved oxygen, free of carbon dioxide (CO2), nitrate (NO3), fosfat (PO4). The type of phytoplankton found 4 classes namely  Bacillariophyceae (2 species), Chlorophyceae (9 species), Cyanophyceae (4 species) and Dynophyceae (1 species).   Phytoplankton abudance range 5147cells/ Liter – 6454 cells/Liter. Water quality parameters such as transparency range 57 – 60,2 cm, temperature range 31-32oC, pH 5, dissolved oxygen range 5,38 – 8,31 mg/L, free carbon dioxide range 0,208 -0,293 mg/L, nitrate range 0,075 – 0,096 mg/L. Based on  phytoplankton abundance , the waters of the Bandar Kayangan reservoir can be categorized oligotrophic. Keyword: Phytoplankton, Water Quality Parameters, Oligotrophic
Relationship between Nitrate and Phosphate with Phytoplankton Abudancein the Inundation of PLTA Koto Panjang Reservoir Batu Bersurat village, XIII Koto Kampar Districts, Kampar Regency, Riau Province Dameyana S.C Lumban Tobing; Asmika Harnalin Simarmata; Madju Siagian
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 7, No 1 (2020): Edisi 1 Januari - Juni 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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AbtractMany activities in the inundation of PLTA Koto Panjang Recervoir Batu Bersurat Village contributed organic matter that affect nitrate and phosphate concentration in water and increasing the abudance of phytoplankton. Aresearch  aim  to know the relationship between nitrate and phosphate with phytoplankton abudance in the inundation of PLTA Koto Panjang and it was conducted in June-July 2019. There were three sampling stations, namely Station I (tourisms and palm’s plantation), Station II (there were restaurant and trees around of station) and Station III (floating cage). In each station, there were three sampling points, in the surface (15 cm), in 2 Secchi depth (330 cm), and in 4 Secchi depth (660 cm). Sampling were conducted 4 times, once/week. Water quality parameter measured were nitrate, phosphate, phytoplankton abudance, transparency, temperature, pH, dissolved oxygen, free carbondioxide and BOD5 (Biochemical Oxygen Demand). The result shown: nitrate 0.06-0.08 mg/L, phosphate 0.05-0.09 mg/L, phytoplankton abundance 123,877-169,428 Cells/L, dissolved oxygen 6.35-6.88 mg/L, free carbondioxide 5-12.99 mg/L, temperature 29-31 oC, transparency 145.1-187.5 cm, pH 5-5.3 and biochemical oxygen demand (BOD5)4.03-8.90 mg/L. The relationship of nitrate and phosphate  with phytoplankton abudance was very strong.Keywords:Kampar River, Floating Cage, Organic Matter, Water Quality, Mesotrophic
Carrying Capacity for Extensive Fishing in Bunter Lake Siak Hulu Sub-District Kampar District Riau Province Based on Chlorophyll-a Zaini Hafiz; Asmika Harnalin Simarmata; Madju Siagian
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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ABSTRACTCarrying capacity is defined as the ability of aquatic enviromment to support the life organism in that area. A study aimed to asses the aquatic carrying capacity based on choloropyll-a for extensive fishing was conducted in the Bunter Lake. Carrying capacity was determined based on primary productivity using chlorophyll-a. The research  was conducted July-August 2019. There were 3 stations namely station 1 (inlet area), station 2 (in the middle of the lake) and station 3 (in the end of the lake). In each stations, there were 2 sampling sites, in the surface and 2 Secchi depth. Sampling was done 4 time, once a week. Water quality parameter measured chlorophyll-a, nitrate, phosphat, dissolved oxygen, water transparency, temperature and pH. Result shown that chlorophyll-a 10.49-10.89 µg/L, nitrate 0.043-0.080 mg/L, phosphate 0.022-0.37 mg/L, dissolved oxygen 4.32-6.59 mg/L, water transparency 77.7-85.2 cm, temperature 29.5-30.5 ºC and pH 5. The concentration of chlorophyll-a indicate that carrying capacity of the Bunter Lake for extensive fishing was 0.73 tons/year.Key Word : chlorophyll-a, carrying capacity, water quality, bunter lake, primary productivity
Organic Matter Load in Pangean Reservoir Pangean District, Kuantan Singingi Regency, Riau Province Darwinda Darwinda; Asmika Harnalin Simarmata; Tengku Dahril
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 7, No 2 (2020): 2 Juli - Desember 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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AbstractPangean reservoir is one of the reservoirs in Pangean district which has a primary function as a irrigation, PDAM and has been used for floating cage fish culture activities. Increasing fisheries activities will increase organic matter that enter the water and and as a consequence it affect water quality in general. A study aims to understand the organic matter load in Pangean Reservoir has been conducted in July-August 2019. Samples were taken from four station, once/week for a weeks. In each station there were 3 sampling point surface, 2 Secchi depth and 4 Secchi depth. Determination of daying coefficient was based on the BOD timeseries (2,4,6,8,10 day). Water quality parameter measured were temperature, transparency, depth, pH, dissolved oxygen, and BOD5. Result shown that decaying coefficient was 0,24-0,124 k/day, temperature was 29-31oC, transparency was 92-102 cm, depth was 248-388 cm, pH was 4-5, dissolved oxygen was 5-6,2 mg/L and BOD5 was 9,6-22,4 mg/L. The decaying coefficient and BOD intertime value indicate that the organic matter in the Pangean reservoir represent as load (P<B) in the water, as the decaying rate is slower than the input rate of organic matter. Keywords : BOD timeseries, decaying coefficient, dissolved oxygen, water quality 
Types and abundance of phytoplankton in the Parit Belanda River Rumbai Pesisir District, Pekanbaru, Riau Satria Yunda; Asmika H. Simarmata; Madju Siagian
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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Phytoplankton is a microscopic aquatic organisms that has limited movement. A research aims to determine types and abundance of phytoplankton has been carried out on December 2016 in the Parit Belanda River. There are three stations namely Station 1 (in the upstream), Station 2 (in the middle) and Station 3 (in the downstream). Samplings were conducted once/week for 4 weeks period. Water quality parameter measured were temperature, transparency, pH, DO, CO2, nitrate and phosphate. Phytoplankton was identified. Result shown that there are 53 types of phytoplankton and they are belonged to 7 classes, namely Bacillariophyceae (17 species), Chlorophyceae (18 species), Cyanophyceae (9 species), Cryptophyceae (1 species), Crysophyceae (1 species) Dinophyceae (3 species), and Xanthophyceae (2 species). Phytoplankton abundance in the Parit Belanda River range from 1,836 – 2,675 cells/L. Water quality parameters were as follows: temperature 28.25-29 oC, transparency 34.4-46.25 cm, pH 5-6, DO 1.95-4.42 mg/L, CO2 32.96-54.95 mg/L, nitrate 0.076-0.137 mg/L, and phosphate 0.194-0.264 mg/L. Based on the abundance of pyhtoplankton, the Parit Belanda River can be categorized as oligotrofic.Keywords:Parit Belanda River, Pyhtoplankton, Oligotrofic, Riau, Water quality.
Trophic State of the Bandar Kayangan Lembah Sari Reservoir Based on Trophic Index (TRIX), Rumbai Pesisir District, Pekanbaru Bennawaty Bennawaty; Asmika Harnalin Simarmata; Tengku Dahril
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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AbstractThere are several human activities such as floating cages, tourism and daily activities are conducted around the Bandar Kayangan Lembah Sari Reservoir and thus the remains of pollutant may enter to the water and affects the trophic state in the reservoir. Trophic Index (TRIX) can be used to determine the trophic state of waters based on chemical and biological parameters. To understand the trophic state of the Bandar Kayangan Lembah Sari Reservoir’s waters based on Vollenweider’s Trophic Index (TRIX), a research has been conducted in March - April 2018. There were four sampling stations, namely station 1 (in the riverine zone of the Ambang River), station 2 (in the riverine zone of the Merbau River), station 3 (in the transition of the reservoir) and station 4 (in the lacustrine of the reservoir). In each station there were three sampling points, in the surface, in the middle of water column, and in the base of water. Sampling were conducted 3 times, once/week. Water quality parameters measured were DIN, total phosphorus, dissolved oxygen, chlorophyll-a, transparency, temperature and pH. Results shown that the transparency was 65.17 - 74.33 cm, temperature 27.33 - 29.33 0C, pH 5, total phosphorus 0.20 - 0.54 mg/L, DIN  0.09 - 0.18 mg/L, chlorophyll-a13.76 - 19.56µg/L, oxygen saturation 62.37 - 100.48%. Trophic Index (TRIX) value of the Bandar Kayangan Lembah Sari Reservoir was 3.79 - 6.45, and it indicates that the Bandar Kayangan water is in mesotrophic to hypereutrophic. Keywords : Ambang River, Merbau River, Water Quality, Vollenweider’sTrophic Index
Types and abundance of periphyton in the glass substrate placed in the Salo River, Salo District, Kampar Regency Santo Rio Pakpahan; Madju Siagian; Asmika Harnalin Simarmata
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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Periphyton it is aquatic microorganisms that are attached in any submerged substrate. This research aims to understand the type and periphyton abundance on glass substrates that were immersed in the Salo River. The research was conducted in August – September 2015. There were 3 stations, namely. Station 1, Station 2 and Station 3. Water quality measured were transparency, temperatur, dissolved oxygen, current velocity, carbon dioxide and pH. Periphyton were then identified. Results shown that there were 33 species and they were included in 5 classes. Bacillariophyceae (22 species), Cyanophyceae (3 species), Chlorophyceae (4 species), Dynophyceae (1 species), and Xanthophyceae (3 species). The abundance of periphyton was 5,460 cell/cm2 – 61,941 cell/cm2. The highest abundance was found in the Station 3 (61,941 cell/cm2) and the lowest was found in the Station 1 (5,460 cell/cm2). Based on data obtained, it can be concluded that the water in the Salo River is categorized as oligotrophic to mesotrophic.Keywords: Salo River, Periphyton, Glass Substrate, Type and Abundance
Co-Authors ', Edduardo Abdi Doly Tarigan Adithia Netanyahu Purba Agung Prabowo Agustri Minggu Samosir Minggu Samosir Ali Akbar Navis Amat M. Siregar Amat Marustar Siregar Andri Hendrizal Arico Candra Tambunan Astria, Katarina Gita Ayunanda Mustika Sari Azmudin &#039; Bennawaty Bennawaty Berton Panjaitan Beta Posmarito Pardede Bibiana W. Lay Br Sitorus, Chrisna Heni Nozelina Br. Allagan, Desima Kristina Buala Ziduhu Laia Budijono, Budijono Christin M. Saragih Cindy Fantika Sari Clara Novicasari Br Surbakti Clemen Sihotang Clemens Sihotang Cristy Artha D Sinurat D Kusumawati, Yuliana Dameyana S.C Lumban Tobing Darwinda Darwinda Dasti Janarko Putra, Dasti Janarko Defi Fitriya Dalimunthe Deni Efizon Desi, Ria Irawan Dewi, Afrila Diah Sari Ninggrum Dimas Dwi Nugroho Santoso Dio M Silalahi Dumaria, Roma Efawani, Efawani Efredy Tamba Eka Dwinata Nopitasari Eko Purwanto Eko Simatupang Ella Dabella Manja Enan M. Adiwilaga Erwin David Sianipar Esmi Yanti br Sinaga Fadilah, Nisa Wangi Tresna Fahrezzy, Reggi Farida Sri Indah Firmansyah, Rodhi Ginting, Dinda Julianti Gultom, Zogi Tri Harjoyudanto, Yudho Hendra Saputra Henni Syawal Hidayati Hasibuan Hidayatunnisah, Putry Hikma, Murbeni Hosianna Sitorus Indra R. Simangunsong, Indra R. Indradewa, Rhian Irfan Anggriawan Irwan Irwan Irwan Nababan Isma Mulyani Jerima, Raihan Jiboro, Mega Rani Joko Samiaji Juliana Ivana Siregar Julianti &#039; July Prenky Purba Karsih, Okta Rizal Krismanto Viade Nababan Libra Trio Situmorang, Libra Trio Lubis, Helfrida M Silalahi, Dio M. Arifan Fadhilla M Madju Siagian Madju Siagian Madju Siagian Madju Siagian Madju Siagian2 Magdalena Fitriani Daeli Maju Siagian Mandasari, Ayu Defi Manurung, Dostiarni Minsa Karolina Maria Virgita Sihaloho, Maria Virgita Merlin Evan Olivia Hutauruk Miranda Wahyuni Raja Gukguk Muhammad Edom Rifai Muhammad Zaki Mulyani, Isma Munthe, Ayaki Tomala Nadia Putri Julita Nadira, Ismi Nainggolan, Dorma Abigail Natasya Margareth Pasaribu Nia Anggraini Nugroho, Rio Cahyo Nur Ikhlas Syuhada, Nur Ikhlas Nuraini El Fajri Nurrina, Haura Olivia, Reyka Kristin Pardede, Secilia Emmanuel Septio Petrus Juandatua Sirait, Petrus Juandatua Prakoso, Dodo Prian Mintaito Simangunsong Putra, Aldo Pratama Radieka Febyando, Radieka Rahmi Hidayana Hasibuan Raihan Jerima Rancelia Kristina Simanjuntak Rati Muspa Rekha Mutiara Manurung Renny Sibuea Ricki Meno P Sinurat Ricky Christoper P. S Rina D’rita Sibagariang Rina Maria Rini Sinaga Rodo Sinatra Nababan, Rodo Sinatra Roma Dumaria Ronal Kurniawan S Sinaga, Jefri Daniel Santo Rio Pakpahan Santoso, Dimas Dwi Nugroho Santun Tua Siburian Satria Yunda Sembiring, Rinawati Septriza Radella Shinta Permata Sari Siahaan, Oloan Sibagariang, Rina D'rita Sibagariang, Rina D’rita Sibuea, Renny Sihombing, Djob Fernadi Sihombing, Evi Stevani Sihombing, Susi Silaen, William Fransisco Simangunsong, Perdinan Simanjuntak, Taruli Septiana Sistim Wehalo Sitohang, Dohar Sitorus, Rike Yance Sofyan Husein Siregar Sovianti, Yona Syada Nopriadi Akbar Tamba, Niger Efafras Tengku Dahril, Tengku Theresia Tifany Saragih Tiara Priskila Tri Prartono Tri Wahyudi Triani, Mike Tuti Maisarah Br. Siregar Valentina Manurung Walmon Sinaga Windarti Windarti Windarti Windarti Yeni Handayani Yona Sovianti Yudho Harjoyudanto Yudi Asriansyah Yuli Suciati Yuni Piratih, Yuni Yunita, Sarah Amelia Yuris Fiestaria Naibaho Yusmidar Yusmidar Zaini Hafiz Zein Lubis, Solat Adawiyah