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All Journal Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Jurnal Al-ittifaq
Meria Ulfa
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Earth & Planetary Sciences Economics, Econometrics & Finance Social Sciences

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Types and Abundance of Phytoplankton in The Maninjau Lake, Tanjung Raya Sub–District, Agam District, Sumatera Barat Province Meria Ulfa; Madju Siagian; Tengku Dahril
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 5 (2018): Edisi 1 Januari s/d Juni 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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Abstract

AbstractManinjau Lake is a volcanic lake that is used for various human activities such as drink water sources, tourisms, transportation and aquaculture. Many activities contributes the input of organic and anorganic matters that affect water quality and the trophic state of the water in general. A research aims to understand the types and abundance of phytoplankton and the trophic state of the Maninjau Lake waters based on the Nygaard Index was conducted in January – March 2017. There were 4 stations namely  Station 1 (bay area), Station 2 (inlet area), Station 3 (fish floating cages area) and Station 4 (outlet area). In each station, the water were sampled from 3 different depths, in the surface (0.5 m), 2 Secchi depth (1.2 m) and 4 Secchi depth (2.4 m). Samplings were conducted once/2 weeks for 1.5 month period. Results shown that there were 68 phytoplankton species that were belonged to six families, namely Bacillariophyceae (20 species), Chlorophyceae (29 species), Cyanophyceae (13 species), Euglenophyceae (2 species), Dinophyceae (1 species) and Chrysophyceae (3 species).The average of phytoplankton abundance was around 12,517 – 21,565 cells/L and the Nygaard Index value was 2.4 – 3.4. The water quality parameters were as follows: temperature 26.8 – 28.4 0C, transparency 53.67 – 72 cm, depth 16.9 – 47.5 m, pH 6 – 8, free CO27.3 – 32.7 mg/L, DO 0.24 – 8.09 mg/L, nitrate 0.02 – 0.39 mg/L and phosphate0.068 – 0.161 mg/L.Based on the abundance of phytoplankton and the Nygaard Index value, the Maninjau Lake can be categorized as mesotrophic to eutrophic. Keywords:Phytoplankton, Maninjau Lake, Indeks Nygaard, Water Quality
PENGARUH KURS DOLAR AS DAN INFLASI TERHADAP DANA PIHAK KETIGA (DPK) PADA BANK NAGARI SYARIAH CABANG BATUSANGKAR Elmiliyani Wahyuni; Yeni Melia; Meria Ulfa
AL-ITTIFAQ: Jurnal Ekonomi Syariah Vol 1, No 1 (2021): Al-Ittifaq: Jurnal Ekonomi Syariah
Publisher : UIN Mahmud Yunus Batusangkar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31958/al-ittifaq.v1i1.3264

Abstract

This study aims to analyze and determine the effect of the US Dollar Exchange Rate and Inflation on Third Party Funds (TPF) at Bank Nagari Syariah Batusangkar Branch for the period 2013-2018. The type of research used in this research is field research with quantitative research methods using a descriptive approach, and using eviews analysis tools with multiple regression and using the Ordinary Least Square (OLS) estimation method. The results of this study indicate that the US Dollar exchange rate variable with a coefficient value (8.141176), the probability value (0.0332) has a positive and significant effect on Third Party Funds (TPF), the inflation variable has a negative and insignificant effect on Third Party Funds (TPF) with a coefficient value ( -0.697542) probability value (0.1019) while the variable US dollar exchange rate and inflation together have a positive and significant effect on third party funds using the Ordinary Least Square (OLS) method, the F-statistic value is 31.98483 with a probability of 0.009481.
Co-Authors Elmiliyani Wahyuni Madju Siagian Tengku Dahril, Tengku Yeni Melia