Diversity and distribution of aquatic insects community in relation to water quality in Sekayu recreational forest Terengganu

Abstract

A total of 3675 individuals of aquatic insects from 40 families belonging to eight orders have been recorded from lower stream (LS), middle stream (MS) and upper stream (US) of Sungai Sekayu headstream. There were eight common orders of aquatic insects recorded which were Trichoptera (31 %), Ephemeroptera (25%), Plecoptera (16%), Odonata (14%), Hemiptera (8%), Coleoptera (4%), Diptera (2%) and Megaloptera (0.3%). In term of family, Perlidae (Order Plecoptera) was the most dominant family as 578 individuals were successfully collected and abundantly found at all sites. However. Trichoptera was identified as the most dominant order in all sampling sites while Sialidae (order Megaloptera) was recorded as rare distribution.