A study of the major Arthropoda taxa of invertebrates recolonizing Saraca roots occurring on various substrates and under various water velocities was carried out in the upper reaches of the Gombak River. The sites for the recolonization experiments were selected in the fast and slow flowing sections of rocks and boulders, sand and gravel and mud and silt biotopes. The Hydropsychidae and the Nemouridae were the pioneer recolonizers of Saraea roots in the fast flowing sections of the stream whereas the Ptilodactylidae and the Caenidae were the pioneer recolonizers in the slow flowing sections of the stream.
Suatu kajian telah dijalankan bagi menentukan takson utama invertebrata Arthropoda yang mengkoloni semula akar Saraca yang didapati pada pelbagai substrat dan pada kelajuan air yang berbeza di bahagian hulu Sungai Gombak. Tapak-tapak untuk ujikaji pengkolonian-semula telah dipilih pada bahagian laju dan perlahan biotop batuan besar dan sederhana, pasir dan batuan kecil, dan lumpur dan kelodak. Hydropsychidae dan Nemouridae adalah pengkoloni perintis pada akar Saraca di bahagian aliran laju sungai sementara Ptilodactylidae dan Caeflidae adalah pengkoloni perintis di bahagian aliran perlahan sungai itu.