Kajian mengenai corak susunan sel salur dijalankan terhadap struktur kayu Baeckea frutescens bagi menilai perbezaan ciri anatomi spesies tersebut akibat impak daripada aktiviti rekreasi di Gunung Tahan, Malaysia. Plot kajian bersaiz 20 m × 20 m dibina di tiga kawasan perkhemahan utama dan penilaian dijalankan di sub-plot yang mewakili kawasan
terganggu dan kawasan kawalan. Kajian menunjukkan terdapat perbezaan pada susunan dan struktur sel salur B. frutescens antara kawasan kajian. Keputusan menunjukkan spesies yang tumbuh di kawasan terganggu mempunyai saiz sel salur yang lebih tinggi dengan nilai 177.06 µm2 berbanding 106.40 µm2 di kawasan kawalan. Bagi parameter tumbesaran pokok, nilai purata diameter di keseluruhan kawasan terganggu adalah 2.10 berbanding 1.55 cm di kawasan kawalan manakala nilai purata bacaan tinggi pokok adalah 0.95± 0.04 dan 0.82 ± 0.06 m bagi kedua-dua kawasan. Kebanyakan kajian lepas menunjukkan ciri anatomi kayu adalah tertakluk kepada faktor genetik sesuatu spesies namun kajian ini menghasilkan pemerhatian yang menarik dan ia menunjukkan bahawa faktor genetik anatomi sesuatu spesies kayu itu boleh berubah sebagai tindak balas terhadap sebarang gangguan dan respons kepada perubahan ciri ekologi sesebuah kawasan.
Macaranga tanarius distribution has been identified in a study conducted by almost all states in Peninsular Malaysia. Assessment on the distribution of M. tanarius was based on the records available and type specimens housed in three different herbarium namely the Kepong Herbarium (KEP) in Forest Research Institute Malaysia, the herbarium in the Faculty of Forestry in Universiti Putra Malaysia and the Herbarium Universiti Kebangsaan Malaysia. While field surveys were carried out from July 2012 until October 2013. There are 128 specimens were assessed from the three herbaria which made in the year of 1925 to 2005. Field surveys showed that M. tanarius can be found from the state of Perlis in the north, to the state of Johor in the south. From the observation, M. tanarius is a commonly found species along the highways and the road sides, whether as single individuals or as mono-stands. It can be seen growing together with other pioneer species of shrubs or trees. The study also shows the growing pioneer species in disturbed habitats and the creation of new space to meet before the displacement process other quality species grows in the forest opening. This study is first surveys involving M.tanarius species including the entire state in peninsular Malaysia. It is intended for the collection and distribution -related service information management for the study of phenology of collecting seeds to be planting material.