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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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Chlorophyll-a Concentration in Teluk Petai Lake Buluh Nipis Village Siak Hulu Sub District Kampar District Riau Province M. Arifan Fadhilla M; 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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ABSTRACTThe research of chlorophyll-a concentration conducted in June-July 2020 at Teluk Petai Lake Buluh Nipis village. A study aims to understand the concentration and throphic state Teluk Petai lake based on chlorophyll-a . 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 vertically there were 2 sampling point, in the surface and 2 Secchi depth. Samplings were carried out three times with  ten days interval. Result shown that temperature is 30-31oC, transparency 61.66-70 cm, pH 5, DO 4.17-5.23 mg/L, CO2 7.98-10.65 mg/L, nitrate 0.038-0.054 mg/L, phosphate 0.051-0.062 mg/L. Result shown that the chlorophyll-a concentration ranged from 7.63-14.37μg/L. Chlorophyll-a concentration influence the water quality such as transparency, nitrate and phosphate concentration. Based on the chlorophyll-a concentration, the waters at Teluk Petai lake can be categorized as mesothrophic. Keywords: Mesothrophic, Throphic State, Water Quality, Depth.
The Difference of Phytoplankton Abundance from the Water around the Floating Cage Fish Culture Area and from the Area with No Cage, in the DAM Site of the Koto Panjang Reservoir Shinta Permata Sari; Asmika H. Simarmata; Clemen Sihotang
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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AbstractIn floating cage fish culture activities, degradation of feed remain and fish feces willaffect the abundance of phytoplankton content in the surrounding area. A research aims tounderstand the difference of phytoplankton abundance in the water from the cage area and fromthe area that has no cage has been done from June – August 2014. In the Koto Panjang Dam,the floating cage fish culture is in the DAM site. Samplings were conducted 4 times, once/2weeks. There were 3 stations, namely 200 m upstream of the cage area (S1), in the cage area (S2)and 200 m downstream of the cage area (S3). In each station, water samples were collected from3 different depth, surface; 2 secchi and 4 secchi depths. Parameters measured were pH,phosphate, nitrate, free carbon dioxide, dissolved oxygen, transparancy, temperature and depth.Results shown the abundance of phytoplankton in the S1 was 1,068 – 8,226 cells/L ; in the S2was 500 – 3,720 cell/L; and in the S3 was 777 – 5,100 cells/L. The highest abundance ofPhytoplankton was in S1, while the lowest was in the cage area (S2). Phytoplankton abundancein the cage area was different compare to the area with no cage. Phytoplankton abundanceindicates that the DAM site area of the Koto Panjang can be classified as mesotrophic, especiallyin the area around the cage. Other water quality parameter measured were temperature: 29 oC –31oC; transparancy 1,98 m – 2,55 m; depth: 27 m – 40 m; pH: 5, free carbon dioxide: 4,49mg/L- 11,48 mg/L; dissolved oxygen: 3,28 – 7,17 mg/L; nitrate: 0,02 – 0,28 mg/L; phosphate :0,03 – 0,35 mg/L. the values of water quality parameters indicate that the water quality in theDAM site of the Koto Panjang is good and might be able to support the life of aquatic organismsin that area.Keywords: Phytoplankton, cage fish culture, Koto Panjang DAM
Type and Abundance of Phytoplankton in the Koto Tibun Reservoir, Kampar Regency, Riau Province Rancelia Kristina Simanjuntak; Asmika H. Simarmata; Clemens Sihotang
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             Phytoplankton 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 Koto Tibun Reservoir has been carried out on February-March 2018. Sampling taken at three stations, namely Station 1 (riverine zone), Station 2 (transition zone) and Station 3 (lacustrin zone), once/week. Parameters measured were temperature, brightness, depth, pH, DO, CO2, nitrate (NO3) and phosphate (PO4). The types of phytoplankton found in the Koto Tibun Reservoir were 27 species that consist of 5 classes, namely Chlorophyceae (11 species), Baccillarophyceae (8 species), Zygnematophyceae (3 species), Cyanophyceae (4 species) and Euglenophyceae (1 species). The abundance of phytoplankton in Koto Tibun Reservoir ranges from 2,544-3,708 cells/ L. The water quality parameters were as follows:transparency 75.33-78.66 cm, temperatures 25.3-25.6 0C, pH 5, DO 4.78-5.62 mg / L, CO218.64-19.44 mg / L, phosphate 0.093-0.113 mg / L, nitrate 0.186-0.193 mg / L. Based on the abundance of phytoplankton, Koto Tibun Reservoir can be categorized as mesotrophic.Keyword: Phytoplankton, Water Quality Parameters, Koto Tibun Dam,Mesotrophic
Types and Abundance of Periphyton in The Ceramic Substrate Placed in The Salo River, Salo District, Kampar Regency Juliana Ivana Siregar; Clemens Sihotang; Asmika Harnalin Simarmata
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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Periphyton is a sessile microscopic organism attach on certain substrate. Research aims to determine the type and abundance of periphyton on ceramic substrate has been carried out in April-May 2015 in the Salo River. There are 3 stations (S1, S2 and S3) for placing the ceramic substrate and for taking water samples. Samplings are conducted once/week for a 4 weeks period. The periphyton samples are brushed from the surface of ceramic substrate (8 cm x 3 cm). The number of ceramic sampled in each station is 10, 6 and 3 pieces in S1, S2 and S3 respectively. Results shown that there are 54 types of periphyton present and they are belonged to 5 classes, namely Bacillariophyceae (36 species), Cyanophyceae (8 species), Chlorophyceae (6 species), Dynophyceae (1 spesies), and Xanthophyceae (3 species). The abundance of periphyton in the ceramic substrate placed in the S1, S2 and S3 is significantly different, there were 9,169 cell/cm2 ; 22,002 cell/cm2 and 67,913 cell/cm2 respectively.Keywords : Salo River, periphyton, ceramic substrate, type and abundance
Thophic State of Bakuok Lake based on Phytoplankton in Aursati Village Tambang District Kampar Regency Riau Province Merlin Evan Olivia Hutauruk; Asmika Harnalin Simarmata; Tengku Dahril
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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                                                    Abstrak Many activities in the Bakuok Lake contribute the input of organic and anorganic matter that affects the nutrient concentration and increasing the growth of phytoplankton. A research  has been conducted in June-July 2019. There were three sampling points, in the inlet, in the middle of the lake, and in the surface (0,15 m) and 2 Secchi depth (1,74 m). Samplings were conducted 3 times, once/week. Water quality parameters measured were temperature, transparency, depth, pH, dissolved oxygen, CO2, nitrate and phosphate.Results shown that there were 33 species of phytoplankton that were belonged to 7 classes, namely Chlorophyceae (15 spesies), Cyanophyceae (2 spesies), Bacillariaphyceae (5 spesies), Euglenophyceae (3 spesies), Zygnematophyceae (5 spesies), Trebouxiophyceae(2 spesies), and Cryptophyceae (1 spesies).The phytoplankton abundance of the Bakuok Lake was 89.689-100.491 cells/L. The most common type ofphytoplankton presentwasAnkistrodesmus  falcatus. Water quality parameters values were as follow, temperature was 29-310C, depth was 4-6 m, pH was 5, dissolved oxygen was 6.57-7.57 mg/L, CO2 was 9.37-13.86 mg/L, nitrate was 0.0190-0.0333 mg/L and phosphate was 0.0354-0.0575 mg/L. Based on the type and abundance of phytoplankton, it can be concluded that the Bakuok Lake can be categorized as mesotrophic. Keywords :Oxbow Lake, Water Quality, Ankistrodesmus falcatus, Mesotrophic 
Carrying Capacity Based on Chlorophyll-ain The Betung Lake Betung Village PangkalanKuras Sub-districtPelalawan District Riau Province Diah Sari Ninggrum; 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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AbstractCarrying capacity is defined as the ability of aquatic environment to support the life of organism in that area. A study aimed to assess the aquatic carrying capacity for extensive fishing in the Betung lake, Betung Village, Pangkalan Kuras Sub-district Pelalawan District, Riau Province. The carrying capacity was determined based on primary productivity using chlorophyll-aconcentration.This 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 point, in the surface (15 cm) and 2 Secchi (160 cm) depth. Sampling was done three times, once a week. Water quality parameters measured werechlorophyll-a, transparency, temperature, pH, dissolved oxygen, CO2, nitrate and phosphate concentration. Results shown that chlorophyll-a:17.81-26.73 µg/L, transparency : 81.3-84 cm, temperature : 28.3-29.7ºC, pH: 5, dissolved oxygen : 3.87-6.12 mg/L, CO2 : 6.27-15.42 mg/L,nitrate : 0.02-0.05 mg/L, and phosphate : 0.02-0.04 mg/L. Based on chlorophyll-a concentration, the carrying capacity in Betung Lake was 1.61 tons/fish/year.Keyword: Oxbow lake, Primary Productivity, and Water quality
Trophic State of The Tajwid Lake, Langgam District, Pelalawan Regency, Riau Province Based on Trophic State Index Adithia Netanyahu Purba; Madju Siagian; Asmika H Simarmata2
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
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 ABSTRACT Many activities in the Tajwid Lake contribute the input of organic and anorganic matter that affects the water quality, especially nutrient concentration in  waters. A research aims to understand the trophic state of the Tajwid Lake based on TSI has been conducted in March - April 2018. There were two sampling points, in the surface (0.5 m) and 2 secchi depth (1.1 m). Sampling were conducted 3 times, once/week. Water quality parameter measured were total phosphorus, chlorophyll - a, transparancy, temperature, dissolved oxygen, and pH. Results shown that the transparancy was 0.47 - 0.55 m, total phosphorus 0.323      - 0.624 mg/L, chlorophyll - a6.03-10.71 µg/L, temperature 29.5 - 30.3 0C, pH 5, and dissolved oxygen 4.96 - 5,66 mg/L. TSI(Trophic State Index) value of The Tajwid Lake was 70.01 - 72.19, and it indicates that the Tajwid Lake water is in hypereutrophic.Keywords: Water Quality, Carlson’ Trophic State Index, Hypereutrophic,Lake
Vertical profiles of phosphate in the lacustrine and transition zones in the Koto Panjang Reservoir, XIII Koto Kampar Districts, Kampar Regency, Riau Province. Sistim Wehalo; Asmika H. Simarmata; Madju Siagian
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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Phosphate is a nutrient that plays as a limiting factor for aquatic organisms and it may affect the aquatic productivity. This research aims to understand the vertical profile of phosphate in the lacustrine and transition zones of the Koto Panjang Reservoir. This research was conducted in September-October 2015. A survey method was applied in this research. Water samplings were conducted 3 times, once/2 weeks. The sampling areas were in the lacustrine and transition zones, two stations in each zone (L1; L2; T1 and T2). Phosphate concentration was analysed based on APHA (2012). Data obtained were then analyzed using a two way ANOVA. Results shown that the surface phosphate concentration in the lacustrine zone was 0.13 mg/L, while that of the transition zone was 0.15 mg/L. Phosphate concentration in the bottom area was slightly higher, it was 0.18 mg/L in the lacustrine and 0.19 mg/L in the transition zone. Result of statistical analysis indicate that there was no difference in the surface’s and bottom’s phosphate concentration in both sampling areas. Based on data obtained, it can be concluded that the Koto Panjang reservoir can be categorized as mesotrophic.Keywords: Koto Panjang reservoir, phosphate, lacustrine and transition
Phytoplankton Composition in The Koto Panjang Dam, Kampar Regency Riau Rina Maria; Asmika H Simarmata; Madju Siagian
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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AbstractThe increment of the number of floating cages in the Koto Panjang Dam may result on increment of organic materials in the water and thus affect the presence of phytoplankton. A study aims to understand the phytoplankton composition around the cages area was conducted on April-May 2018. Samplings were conducted 3 times, once/week. There were 3 stations namely Station 1 area with 100-150 floating cages, Station 2 area with 200-300 floating cages and Station 3 area with 946 floating cages.   In each station, there were 3 sampling points, in the surface, in 2 Secchi depth, and in 4 Secchi depth. Water quality parameters measured were transparency, temperature, pH, dissolved oxygen, free carbon dioxide, nitrate and phosphate. Results shown that there were 8 genera presents, namely Chlorophyceae (29 species), Zygnematophyceae (17 species), Trebuoxiophyceae (2 species), Cyanophyceae (14 species), Bacillariophyceae (14 species), Meidiophyceae (1 species), Cryptophyceae (1 species) and Euglenophyceae (1 species). They were consisted of 79 phytoplankton species. As the number of cages increase, types of phytoplankton present decrease. However, there is relationship between cages and abundance. As the number of cages increase, phytoplankton abundance also increase. The highest abundance was 72,468 cells/L (Station 3) and the lowest was 24,580 cells/L (Station 1). Other water quality parameter measured were transparency : 101-138 cm;       temperature : 28.3-31.70C; pH : 5.0-5.5; dissolved oxygen : 2.21-7.23 mg/L;    free carbon dioxide : 11.09-26.93 mg/L; nitrate : 0.06-0.17 mg/L and      phosphate : 0.07-0.26 mg/L. Based on data obtained, it can be concluded trophic state of Koto Panjang reservoir was categorized as eutrophic. Keyword: Koto Panjang Reservoir, Water quality, Organic Matter, Eutrophic
Carrying Capacity Assessment of Tanjung Putus Lake for Extensive Fishing Based on Chlorophyll-a Buala Ziduhu Laia; Asmika Harnalin Simarmata; Tengku Dahril
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 carrying capacity is defined as the ability of aquatic environment to support the life of organism in that area. A study aimed to assess the aquatic carrying capacity for extensive fishing in the Tanjung Putus Lake, Buluh China Village, Kampar District, Riau. The carrying capacity was determined based on primary productivity using chlorophyll-a value, which is indicating the existence of phosphate in waters.This research was conducted March, 2018.There were 3 stations namely station 1 (inlet area), station 2 (in the middle of lake) and station 3 (outlet area). In each stations, there were 2 sampling sites, in the surface and in the middle of water column. Sampling was done three times, once a week. Water quality parameters measured weretransparency, temperature, pH, dissolved oxygen, phosphate and nitrate concentration. Results shown that chlorophyll-a: 6.98-7.52 µg/L, transparency: 85.17-96.5 cm, temperature: 30.2-31.8 oC, pH: 5, dissolved oxygen: 4.82-         6 mg/L, phosphate: 0.05-0.09 mg/L and nitrate: 0.05-0.06 mg/L. The concentration of chlorophyll-a indicates that the carrying capacity of the Tanjung Putus Lake for extensive fishing was 1,74 tons/year. Keyword: Oxbow lake, Extensive fishing, Phytoplankton, Water quality
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 ' 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 ' 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