Studi Populasi Dan Habitat Shorea atrinervosa Symington di Muara Talam Pulau Mursala

Abstract

This study aimed to examine the population and habitat characteristics of Shorea atrinervosa Symington on Mursala Island, Central Tapanuli Regency, North Sumatra. The research was conducted in January–July 2025 using a purposive sampling method, with plots categorized based on growth stages: seedlings, saplings, poles, and mature trees. The analysis revealed that S. atrinervosa has strong regeneration potential, indicated by high importance value index (IVI) at the sapling (26.76%) and pole (27.08%) stages, but showed a significant decline at the mature tree level (5.53%). This suggests limited adult populations and highlights the need for conservation efforts. The distribution pattern of S. atrinervosa was classified as uniform, with a Morisita Index of 0.962, indicating competition among individuals and possible habitat disturbances. The habitat is characterized by an average temperature of 28°C, high air humidity (71– 98%), slightly acidic to neutral soil pH (5.96–6.8), sandy loam texture, elevation ranging from 76 to 178 meters above sea level, and sloping to steep topography. These conditions support the optimal growth of S. atrinervosa, a species typical of lowland tropical rainforests. Environmental correlation analysis showed significant relationships between temperature, air humidity, and slope with the species’ presence. These findings provide valuable information for data-driven conservation planning, especially in managing rare species and preserving tropical forest ecosystems under anthropogenic pressure.