Analisis Kesesuaian Habitat Kantong Semar Toba (Nepenthes tobaica) Menggunakan Maximum Entropy di Provinsi Sumatera Utara

Abstract

Nepenthes tobaica is a species of the Nepenthaceae family that has a unique ability to adapt to nutrient-poor environments through insect trapping mechanisms. In addition to its value as an ornamental plant due to its attractive shape and color, the liquid in its pouches is also used in traditional medicine. This study aims to analyze the habitat suitability of N. tobaica in North Sumatra Province and evaluate the vegetation composition and association relationships in Samosir Regency. Field data collection was conducted using purposive sampling, employing environmental variables such as elevation maps, slope gradient, land cover, soil type, river networks, aspect, and bio-climatic data analyzed using Maximum Entropy software. Vegetation analysis utilized nested sampling across a 1-hectare area comprising 25 plots. The results of the study showed that 16 districts were classified as suitable and highly suitable. Vegetation analysis in Samosir Regency found 11 N. tobaica clusters in Ambarita Village, 36 clusters in Palipi Village, and 22 clusters in Ronggur Nihuta Village. The dominant vegetation at the tree level in Ambarita and Palipi is Pinus merkusii, while in Ronggur Nihuta, dominance is found at the pole level by Pinus merkusii.