COMMUNITY STRUCTURE, ABUNDANCE AND DISTRIBUTION OF PHYTOPLANKTON IN POLLUTED RIVER Sang Ayu Made Putri Suryani *, I Wayan Arya, Ni Made Darmadi, I Made Kawan
Aquatic Resources Management, Faculty of Agriculture, University Warmadewa
Abstract
Phytoplankton is a floating aquatic organisms and as primary producers. This study aimed to determine the community structure, abundance and distribution of phytoplankton on the upstream, branch, midstream and downstream. The method used is a descriptive exploratif method and analyzed with SPSS 20 version. The results showed that in upstream have seven genera of phytoplankton, ten genera in the branch, fourteen genera in the middlestream and sixteen genera in the downstream. Genera phytoplankton found Anabaenopsis, Comphospaeria, Oscillatoria, Spaerocystus, Nitzchia,and Peridinium found in four stations. The highest of abundance at downstream is 403.590 individu /liter and the lowest in the upstream is 51.366 individu/liter..The highest diversity index in the downstream is 2.79 with dominance index is 0.126 and 0.617 for similarity index. The results of one-way ANOVA showed that the number of phytoplankton genera is significant at different stations. The results of this study are community structure, abundance, and distribution of phytoplankton there is a difference from the upstream, branch, midstream and downstream due to the influence of water quality parameters exceed the quality standards.
Keywords: Phytoplankton, Community structure, Abundance
