Diversity of mayfly larvae at the Nan headwater streams, Nan province

Species diversity of mayfly larvae at the Nan headwater streams, Nan province

Abstract

Diversity of mayfly larvae (Order Ephemeroptera) at the Nan headwater streams, Nan province, was investigated. Eight sampling sites and three periods (November 2019, March 2020, November 2020) were collected using D-frame net and the hand-picking method. Fourteen families, 35 genera and 43 species of mayfly larvae were identified. The family Heptageniidae is the most diverse species richness followed by Baetidae and Ephmerellidae, respectively. Multivariate analysis revealed that the Mae Nam Wa and the Sapan waterfall sampling sites were correlated with species richness and distribution, which showed high diversity mayfly larvae and limited only two sampling sites. These sampling sites showed diverse of microhabitat and minimal disturbed sites from anthropogenic activities.