Abstract
Pinus Jantho Forest (PJF) Nature Reserve has unique characteristics and distinctive ecosystem that plays an important role in the preservation of germplasm and the protection of natural resources. The sustainability of the PJF Nature Reserve is strongly determined by vegetation of its constituents. Therefore, an effort is needed to help its management properly, one of which is by knowing the diversity of plants that make up the community in PJF Nature Reserve. The purpose of this research is to analyze the composition and diversity of plant species in PJF Nature Reserve. Data collection and sampling were done using multiple square method. The plots were laid out by systematic sampling. PJF Nature Reserve composed of 111 species from 46 family. The seedling and understorey have the highest number individuals (1028 in total). Then there are 240 individuals at sapling level, 108 individuals at pole, and 72 individuals for tree. The Euphorbiaceae family has the largest number of species (11 species). The highest Important Value Index (IVI) for seedlings and understorey, sapling and pole, and tree respectively were Chloranthus elatior (11.09%), Piper aduncum (21.90% and 19.32%), and Pinus merkusii (25.52%). The Diversity Index indicates a high level of plant species diversity (3.25-3.63).
Highlights
Sumatran forests have a greater wealth of plant communities than other regions in the world [1]
Vegetation in Pinus Jantho Forest (PJF) Nature Reserve, Aceh Besar is composed of 111 species of plants belonging to 46 families (Supplement 1)
PJF Nature Reserve is in an ideal environmental range for many plants (Table 1)
Summary
Sumatran forests have a greater wealth of plant communities than other regions in the world [1]. Of five major islands in Indonesia, Sumatra is the third largest island based on endemic species [2]. This rich environment is evidenced by various types of lowland and mountainous ecosystems [3]. Sumatra has been categorized as one of 200 critical-status ecoregions, making it a global conservation priority [4][5]. In the northern part of Sumatra is the province of Aceh. Aceh has many forest areas that need to be protected and conserved for their biodiversity. One such forest is Pinus Jantho Forest (PJF) Nature Reserve
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