Plankton diversity in intertidal zone kondang merak beach district of malang, east java

Kondang Merak beach is one of the beaches on the southern coast of Malang district, East Java, which is used as a fishing area and marine tourism destination. Beachs in the south of the Java island has a profile is relatively steep, the substrate of coral, and wavy large, it is the influence on water quality and diversity plankton. This study aims to identification of plankton diversity and abundance in the intertidal zone of Kondang Merak beach. Sample taken using transect method at 8 stations. Each station consists of 3 substations namely the upper intertidal zone, the middle intertidal zone, and the lower intertidal zone. Samples were taken at three times different, ie morning, noon, and night, using net plankton no.25. Plankton diversity was analyzed based on Shanon-Wiener diversity index calculations and relative abundance Odum. The results of the study showed that in the intertidal zone of Kondang Merak beach, found out of 43 types of plankton were consist 29 species phytoplankton and 14 species zooplankton. Index diversity of plankton 2.59 included moderate category. The most abundant is Diatome, relative abundance 19.81%, followed Oscilatoria and Closteriopsis longisima 8.47% and 17.57%. The quality of waters still suitable for sustaining life plankton temperature 26.2-29.45°C, brightness infinitely, Total Suspended Solids 0.321-0.488 g, pH 7.8-8.0, salinity 35°/ ∞ , DO 4.08-6.10 ppm, BOD 0.622-0.994 ppm, and CO 2 20.29-39.45 ppm.