Komposisi Dan Struktur Komunitas Fitoplankton Di Perairan Teluk Sungai Pisang Kota Padang Sumatera Barat pada Musim Kemarau

AbstractSungai Pisang Bay is located south of Padang City, at this location there are various activities including Pasumpahan Island water tourism, fishing, and settlement activities. This expected to pollute the sea have an impact on marine biota, especially phytoplankton. The purpose study was examine quality seawater based composition structure phytoplankton community in Sungai Bay, City. research conducted using survey methods field sampling plankton net three sample stations Island, Ujung Setan Island. result 100 species were found consisting 4 classes, namely Bacillariphyceae 66 species, Chlorophycaeae 1 Cyanophyceae 3 Dinophyceae 30 species. diversity index April ranged from 2.056-3.165 Mei 2.644-2.977. equitability 0.565-0.836 0.727-0.809. dominance 0.054-0.087 0.096-0.131. Physical Chemistry good condition base KEPMEN LH No 51/2004. It can be concluded that waters presence dry conditions good.