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Clemen Sihotang
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Earth & Planetary Sciences

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Vertical Profile of Phytoplankton Abundance in Tanjung Putus Oxbow Lake Buluh Cina Village Siak Hulu Sub District Kampar District Riau Province Simanjuntak, Debora Melani; Simarmata, A. H.; Sihotang, Clemen
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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This research was conducted in February 2013 at Tanjung Putus Oxbow Lake.Phytoplankton samples were collected from 3 stations. In each station, there were 2sampling sites, in the surface and in 2.5 Secchi depth. Sampling was done three times,once a week. Objective of this research was to find-out the vertical profiles ofphytoplankton abundance in Tanjung Putus Oxbow Lake. Results of this researchrevealed 47 species of phytoplankton were classified into 5 classes, namely, Chlorophyceae(14 species), Cyanophyceae (6 species), Bacillariophyceae (10 species), Chrysophyceae (1species), and Xanthophyceae (5 species). The phytoplankton abundance at surface rangedfrom 221634-361213 cells/l and in 2.5 Secchi depth ranged from 135814-216923 cells/l. Thevertical profile of phytoplankton abundance was higher in surface than that in 2.5 Secchidepth. The water quality parameters such as water temperature ranged from 30-31oC,transparancy from 89-92.3 cm, depth from 141.7-301.7 m, pH 5.0, dissolved oxygen from3.50-6,17 mg / l, free carbon dioxide from 7.76-15.7 mg / l, nitrate from 0.02-0.1 mg / l, andphosphate ranged from 0.020-0.1 mg / l. Based on phytoplankton abundance, Tanjung PutusOxbow Lake was categorized mesotrophy.Key words : Phytoplankton, the vertical profiles, Tanjung Putus Oxbow Lake
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
Dissolved Oxygen Concentration 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 Nia Anggraini; 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 willincrease the Dissolved Oxygen content in the surrounding area. A research aims to understandthe Dissolved Oxygen concentration in the water from the cage area and from the area that hasno cage has been done from July - November 2014. In the Koto Panjang Dam, the floating cagefish culture is in the DAM site. Samplings were conducted 4 times, once/ 2 weeks. In There were3 stations, namely 200 m upstream nof the cage area (S1), in the cage area (S2) and 200 mdownstream of the cage area (S3). each station, water samples were collected from 3 differentdepth, surface; 2 secchi and 4 secchi depths. Parameters measured were dissolved oxygenconcentration, phytoplankton, free carbon dioxide, nitrate, phosphate, temperature, pH,transparancy, and depth. Result shown the concentration of Dissolved Oxygen in the S1 was 4,52mg/L – 7,17 mg/L; in the S2 was 3,28 mg/L – 6,57 mg/L; and in the S3 4,00 mg/L – 6,87 mg/L.The highest concentration of the Dissolved Oxygen was in the upstream (S1) while the lowestwas in S2. Other water quality parameter measured were phytoplankton: 500 cells/L – 8,226cells/L; free carbon dioxide: 4,49 mg/L - 11,48 mg/L; temperature: 30,6oC – 31oC; pH: 5;transparancy 1,98 m – 2,55 m; depth: 27 m – 40 m. General the parts quality still support theaquatic organism life. 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: Dissolved Oxygen, cage fish culture, Koto Panjang Dam
Co-Authors A. H. Simarmata Asmika Harnalin Simarmata Debora Melani Simanjuntak Nia Anggraini Shinta Permata Sari