CD Skripsi
Hubungan Fosfat Dan Nitrat Dengan Kelimpahan Diatom Planktonik Di Perairan Tanjung Unggat Kota Tanjungpinang
This research was conducted in October 2019 in Tanjung Unggat waters. This study aims to determine the concentration of phosphate and nitrate, density distribution of planktonic diatoms, abundance of planktonic diatoms, and determine the relationship of phosphate and nitrate concentrations with abundance of planktonic diatoms in Tanjung Unggat waters. The method used is a survey method by taking samples, and measuring water quality directly in the field. The sampling location was determined by purposive sampling consisting of 4 stations, each station consisting of 3 sampling points with a distance of ± 100m between sampling points. The sample is taken at 10.00-13.00 WIB. The average phosphate concentration value at each station is around 0,025-0,043 mg/l. While the average nitrate concentration ranges from 0,015 to 0,050 mg/l. Planktonic diatoms found in Tanjung Unggat waters consist of 14 species of diatoms distributed at each station namely Isthmia sp., Chaetoceros sp., Rhizosolenia sp., Synedra sp., Melosira sp., Biddulphia sp., Nitzschia sp., Navicula sp., Triceratium sp., Stephanodiscus sp., Diploines sp., Licmophora sp., Pleurosigma sp., and Coscinodiscus sp. The average abundance of planktonic diatoms ranged from 3.988,00 to 17.192,73 cells/l. The results of the linear regression analysis showed a positive linear relationship between phosphate and nitrate with abundance of planktonic diatoms, meaning that abundance of planktonic diatoms will increase if the concentration of phosphate and nitrate increases. The correlation coefficient (r) shows that there is a moderate relationship between phosphate and planktonic diatoms abundance with r = 0,487, while nitrate has a strong relationship with planktonic diatoms abundance with r = 0,654.
Keywords: Phosphate, Nitrate, Diatom, Planktonic, Abundance, Relationship
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