Keywords :
Seasonality; Density; Diversity; Insect Decomposer; Sakaerat Environmental Research Station
บทคัดย่อ :
Insect decomposers play many important roles in terrestrial ecosystems. Their population usually fluctuated according to seasons and associated with environmental factors. The aims of this study were to investigate seasonal density and diversity of insect decomposers in dry dipterocarp forest (DDF), ecotone area (ECO) and dry evergreen forest (DEF) in Sakaerat Environmental Research Station (SERS), Thailand. Furthermore, the correlation between density and diversity of insects and temperature, humidity and rainfall were also examined. During October 2006 to September 2009, insect decomposers were collected monthly in 20 x 20 cm plot of each study site. Climate parameters were recorded from the meteorological stations in SERS. The results revealed that a total of 4,156 individuals of insect decomposer from 9 orders 27 families were captured in SERS. The two most common families were Termitidae (termites) (26.42%) and Formicidae (ants) (24.93%). The highest average density of insect decomposers was in DEF (1.55(+-)2.87 individuals/unit sample), followed by ECO (1.41(+-)2.65 individuals/unit sample) and DDF (1.31(+-)2.2 individuals/unit sample), respectively. Among the seasons, the average densities of insects were 2.01(+-)3.49 individuals/unit sample in the summer, 1.42(+-)2.59 individuals/unit sample in the rainy season and 0.85(+-)1.62 individuals/unit sample in the winter. The diversity of insects were 2.34, 2.5 and 2.32 in DDF, ECO and DEF and were 2.46, 2.36 and 2.26 in the summer, the rainy season and the winter, respectively. Temperature, relative humidity and rainfall were positively correlated diversities of insect decomposers in DDF, ECO and DEF. Relative humidity also associated with insect densities in all study sites. Temperatures were correlated with insect diversities only in DDF and ECO. Correlation between rainfall and insect density was not detected in this study.
เอกสารอ้างอิง :
Tantipanatip, W., Thanee, N., & Aroon, S. (2016). Seasonal Density and Diversity of Insect Decomposers in Three Forest Types of Sakaerat Environmental Research Station, Thailand. International Journal of Agricultural Technology, 12(7.1), 1525-1536.
