Comparison of sampling methods for aquatic insect indicators of forest condition in terms of collection efficiency

摘要

Aquatic insects (Ephemeroptera, Plecoptera, Trichoptera) are highly dependent on forest environments. In order to research for aquatic insect indicators that respond to alteration in the forest environment, useful and simple sampling methods are required. In this study, quantitative and qualitative sampling surveys and light trap surveys were compared with regard to the number of families and individuals which were collected. For Trichoptera, light trap survey of adults was the most effective method.For Plecoptera and Ephemeroptera, qualitative sampling survey of larvae from the beds of shallow streams was the most effective method.