A preliminary study of orthopterans biodiversity in the paddy fields of Sleman Regency, Special Region of Yogyakarta

Abstract

This study was conducted to study orthopterans biodiversity in the paddy fields of Sleman Regency. This research was conducted on the paddy fields of Sleman which were divided into two lines (Palagan and Cangkringan lines). The variations of altitude are 150-250 masl, 260-350 masl, 360-450 masl, and 460-550 masl. Observations were performed by purposive sampling. The environmental parameters, such as humidity, light intensity, and temperature, were measured. Diversity of orthopteran was analyzed using Shannon - Wiener index (H') and Evenness index (E'). We found 4.417 individuals which consisted of nineteen species, sixteen genera, and five families. The most dominant species were Oxya japonica, Gesonula mundata, and P. fumosa, while Caryanda spuria, Euconocephalus pallidus, and Paratettix sp. were minor species. The highest diversity and evenness of orthopteran in Palagan line was at P4 (H'=1.836, E' = 0,678), and in Cangkringan line was at C4 (H'=2.098, E'=0.755). The lowest diversity and evenness of orthopteran in Palagan line was at P2 (H' = 1.141, E' = 0.433), and in Cangkringan line was at C2 (H' = 0.989, E' = 0.375). Correlation value between altitudes with individuals, diversity, and evenness were -0.069, -0.676, and -0.530, consecutively.