Despite the increasing numbers of hydro-dam worldwide, only a handful of studies evaluated their impacts on biodiversity especially terrestrial small mammals. This survey aimed to provide an updated checklist and diversity status of small mammals inhabiting the Tekai-Tembeling Forest Reserve (TTFR), an area that has been extensively logged for the next phase of construction of dam. To elucidate further the species assemblages and diversity of small mammals within TTFR, a comparison was made to a nearby forest, Ulu Jelai Forest Reserve (UJFR), which was also has been logged for the development of Telom Dam. 10 days survey conducted in March 2018 by using cage-trapping and mist-netting techniques, successfully recorded a total of 27 species (Shannon Index (H’) = 3.11) in TTFR and 23 species (H’=2.62) in UJFR. Most of these species in TTFR were bats (56 individuals representing 22 species), rodents (three species representing four individuals) and squirrels (two species representing three individuals). Insectivorous bat species, Narrow-winged Pipistrelle (Pipistrellus cf. stenopterus), are the most abundance in TTFR mainly because insectivorous bats behavior that forage understory in a lowland forest and some of these bats is known to forage in groups. Results from this study indicated that richness and diversity of small mammal’s species assemblages appear to decline in TTFR at which this can be associated to less sampling approaches due to the seasonal impact (rainy season) and habitat disturbance or habitat changes resulted from extensive logging activity. A good mitigation measures should be conducted immediately to prevent elimination species at the study area.

Penyerpihan habitat adalah pemacu kepada isu kepupusan pelbagai spesies yang menyebabkan serpihan hutan menjadi lebih kecil dan terpencil. Kajian ini dijalankan bertujuan untuk mengukur komposisi serta kepelbagaian spesies mamalia terestrial (bersaiz sederhana dan besar) di koridor ekologi CFS1:PL1 dan CFS1:PL6. Pemasangan 211 perangkap kamera di kedua-dua koridor berjaya menghasilkan sejumlah 43,799 imej bebas (8,594 perangkap/malam). Sebanyak 30 spesies mamalia berjaya direkodkan dengan 28 spesies daripadanya ditemui di PL1 dan 17 spesies di PL6. Artiodactyla adalah Order yang menunjukkan kekerapan hadir tertinggi (869 imej bebas) manakala Karnivora adalah Order yang mencatatkan kepelbagaian spesies tertinggi (14 spesies). Sebanyak sembilan spesies menyumbang kepada lebih daripada 90% komuniti mamalia di PL1 dan PL6 dan tiada perbezaan yang signifikan antara komuniti mamalia di kedua-dua kawasan kajian. Hasil analisis mendapatibabi hutan (Sus scrofa) (PCRI = 62.17), kijang (Muntiacus muntjak) (PCRI = 31.20) dan beruang matahari (Helarctos malayanus) (PCRI = 15.14) merekodkan kekerapan (PCRI > 10) yang tinggi melintasi koridor PL1. Manakala di PL6, spesies yang sering direkodkan ialah kijang (Muntiacus muntjak) (PCRI = 47.70), tapir Malaya (Tapirus indicus) (PCRI = 26.21), babi hutan (Sus scrofa) (PCRI = 23.61), gajah Asia (Elephas maximus) (PCRI = 11.57) dan seladang (Bos gaurus) (PCRI = 10.63). Walau bagaimanapun, kekerapan melintasi koridor bagi mamalia sederhana hanya dilihat di PL1 sahaja oleh spesies pelanduk/napuh (Tragulus sp.) (PCRI = 20.88) dan landak raya (Hystrix brachyura) (PCRI = 14.68). Tuntasnya, langkah pemuliharaan yang lebih efektif dan pelan pembinaan lintasan hidupan liar perlu dilaksanakan di kedua-dua koridor memandangkan koridor ini digunakan pada frekuensi yang tinggi.