CD Skripsi
Identifikasi Jenis Plankton Sebagai Bioindikator Perairan Di Anak Sungai Rokan, Kecamatan Batu Hampar, Kabupaten Rokan Hilir, Provinsi Riau
Plankton are microscopic organisms that live on the surface of the water, whose movement follows the current, and can serve as bioindicators of aquatic ecosystems. The tributary of the Rokan River is located near residential areas, meaning various human activities can potentially affect the surrounding water quality. This study aims to identify the types of plankton that function as bioindicators in the tributary and to calculating abundance, diversity index, evenness, and dominance of plankton found in the Rokan River tributary, Batu Hampar District, Rokan Hilir Regency, Riau Province. Sampling was conducted at three different stations along the Rokan River tributary in Batu Hampar District, Rokan Hilir Regency, Riau Province, with three repetitions at each station over a period of three weeks. Plankton observations were carried out at the Zoology Laboratory, Department of Biology, Faculty of Mathematics and Natural Sciences, University of Riau. The results of the study showed the presence of 7 phytoplankton species and 1 zooplankton species, namely Melosira sp., Fragilaria sp., Synedra sp., Aulacoseira sp., Tabellaria flocculosa, Closterium sp., Oscillatoria sp., and Trichocerca sp. Based on plankton abundance values, the Rokan River tributary is classified as oligotrophic. According to the values of plankton diversity, evenness, and dominance indices, station 1 was the least disturbed site, while station 3 was the most disturbed.
Keywords: Abundance, aquatic bioindicator, identification, Rokan River tributary, plankton.
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