Komunitas Collembola Permukaan Tanah pada Lima Tipe Habitat di Kawasan Telaga Warna Kabupaten Bogor dan Cianjur

Abstract

Collembola (Springtails) is a highly diverse group of Arthropods having important function in soil ecosystem. However, Collembola diversity and abundance in Indonesian is poorly studied. This research was aimed to study the Collembola communities of five habitats in Telaga Warna area in Bogor and Cianjur Regency, West Java. The Collembola were collected from Agathis and Calliandra forest, forest surrounding the Lake Telaga Warna, nature conservation forest, Pinus forest, and border of forest and tea plantation. Samples were collected in November 2007 to May 2008. Pitfall traps and litter-humus samples were used to collect the Collembola. Each habitat had twenty pitfall traps that were set along 100 in length two transects and were kept for three days. Five litter-humus samples were collected from each habitats type and a modification of Berlese funnel was used to sort out Collembola from humus and litter for two weeks. Data was analysed by using Hill index to determine Collembola dominance and abundance in each type of habitat. Result showed a number of 17 569 Collembola were collected from the five habitats. They consisted of 3 orders, 10 families, and 29 genera. Dominant order, family and genera in all habitats were Entomobryomorpha, Isotomidae, and Isotoma, respectively, except in nature conservation forest. Hence, Isotoma could be an indicator as Collembola existed in the open areas. The highest abundance and dominance values of genera Collembola was found in Agathis and Calliandra forest. This was due to density of under growth (Calliandra), soil humidity, organic C, C:N ratio, total of N, potassium, high water content, and low of pH. The lowest one was found in Pinus forest, having less diversity under growth and less soil and air humidity. Based on Hill index, pitfall traps method performed higher values of species abundance and dominance compared to litter-humus samples. Isotoma and Lepidocyrtus were dominant and abundant in pitfall traps method. In litter-humus samples method, Folsomia (Isotomidae) and Isotoma (Isotomidae) were found dominance and abudance.