Penelitian ini dilakukan untuk mengetahui struktur komunitas filoplankton serta hubungannya lerhadap kondisi fisiko-kimia perairan di Waduk Krenceng Cilegon. Kelimpahan fitoplankton dihitung dengan lackey drop microlransect method, keanekaragaman jenis dengan indeks Shannon Wiener, kesamarataan jenis dengan indeks Evenness. Hubungan anlara fitoplankton dengan lingkungan menggunakan analisis regresi berganda. Hasil identifikasi ditemuka 26 jenis fitoplankton yang termasuk dalam 4 klas dengan kelimpahan tertinggi jenis Microcysiis aeroginasa. Hasil analisa regresi menunjukkan faktor lingkungan yang berpengaruh terhadap kelimpahan fitoplankton pada bulan Nopember adalah: kecerahan, suhu, pH, oksigen terlarut, nitrat, dan orthofosfat. Sedangkan pada bulan Marel faktor-faktor lingkungan seperti keceraahan, suhu, pH, oksigen terlarut, nitrtal, dan CO; lebih berpengaruh.
This research was carried out lo know the structure of the phytoplankton communities as well as his relations lo the physical and chemical water conditions in the Krenceng Reservoir, Cilegon. The phytoplankton abundance, diversity and evenness were counted. Relations between the phytoplankton and the environment were calculated with regression. We identified 26 species of the phytoplankton that including in four classes with the highest abundance of the Microcystis aeroginosa. The analysis of regression pointed out that the environmental factors such as brightness, temperature, pH, dissolve oxygen, nitrate, and orthophosphates influence the phytoplankton abundance in November, whereas in March the influenced factors are brightness, temperature, pH, dissolve oxygen, nitrates, and CO2. |
