Chairani, Nurfitri2023-05-042023-05-042023-01PerpustakaanElfitrahttps://repository.unri.ac.id/handle/123456789/10962The Ghimbo Potai Prohibition Forest is a customary forest located in Koto Tibun Village, Kampar District, Riau Province. Meranti Rambai is understorey plant at the Ghimbo Potai Forest that has an important role in the balance of ecosystem. This study aimed to determine the effect of abiotic factors on Meranti Rambai grown in the Ghimbo Potai Prohibition Forest. The research was conducted in January 2022 and samples were taken from four sites in the Ghimbo Potai Forest. Determination of sampling plots was carried out using tracking survey, placing plots based on presence of understorey vegetation amongst canopy of meranti rambai stands in Ghimbo Potai Forest. The results showed that abiotic factors including temperature, humidity, light intensity, canopy cover, and soil acidity (pH) affected the growth of understorey plants. The intensity of light entering forest floor was quite low leading to high temperature and humidity that affected the density of undergrowth on Meranti Rambai stands that grown in the good category.enGhimbo PotaiAbioticMeranti RambaiUndergrowthCanopy CoverArticle