Distribution and Diversity of Diatom in Surface Sediments of Urban Ponds in Cibinong Botanical Garden

Diatoms are classified as algae within the Division of Bacillariophyta. They are unicellularly eukaryotic organisms characterized by siliceous cell walls that can be long preserved in sediments. Therefore, diatom analysis in sediment records is potential indicator used for environmental reconstruction. The current knowledge on the distribution and diversity of diatoms in the sediments in many Ponds in Cibinong-Bogor is poorly known. This study aimed to identify the distribution and diversity of diatoms from the sediments of the Pond. We expect to obtain primary data base of a variety of diatoms. The sediment samples were taken from Cibuntu and Cilalay Ponds in Cibinong Botanical Garden. Sediments were digested using HCI and H202. The resulting diatom solution was dried and transferred onto glass coverslip, which subsequently mounted onto microscope slides using Naphrax (Refraction index 1. 7). Diatom Identification was examined using light microscopy at 1, OOOx maginification. Diatom communities in Cibuntu Pond were dominated by species Aulacoseria ambigua, Eunotia bilunaris, Cymbopleura sp, Discostella stelligera, and Rossithidium sp with diversity index (H7 2.4 and species eveness (J7 0.8. Whereas, species Fragilaria sp, Eunotia monodon, Navicymbula pusilla, Eunotia bilunaris, and Pinnularia viridis were predominant in Cilalay Pond with number of diversity index in Cilalay Pond is 1.6 and species eveness 0. 7. This exploratory survey provides the first inventory of diatom assemblage in Cibinong region for roughly infen1ng the environmental changes in shallow lake ecosystem. Proceedings of the 16th World Lake Conference. Hal. 612-617 ISBN 978-979-8163-25-8