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All Journal Jurnal Biologi Udayana BIOTROPIA - The Southeast Asian Journal of Tropical Biology Proceeding International Conference on Global Resource Conservation
Laily Mukaromah
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Health Professions Immunology & microbiology Veterinary Other

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Diversity patterns and compositional variation of understorey plants in tropical forest of Mt. Pohen, Batukahu Nature Reserve, Bali Mukaromah, Laily
Proceeding International Conference on Global Resource Conservation Vol 6, No 1: Proceeding of 6th ICGRC 2015
Publisher : Proceeding International Conference on Global Resource Conservation

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Abstract

An understanding of the patterns in biodiversity is fundamentally important for efficient management of nature reserves. The objectives of this study were to: 1) investigate the diversity of understory plants in the tropical forest of Mt Pohen, Batukahu Nature Reserve, Bali, 2) explore patterns of understory plants in relation to underlying environmental factors. Field data collection was conducted to sample vegetation characteristics and the environmental parameters in the 78 quadrats of the study sites.Diversity indices (richness, diversity, and evenness) were measured and compared for each site. Environmental variables were plotted on the diagram produced by the NMDS to evaluate their relationship with the floristic patterns encountered. A total of 122 plant species were enumerated from 78 quadrats in the study area. Results show that Asteraceae and Poaceae were the predominant families in this study, followed by other most important families, i.e. Myrtaceae, Fabaceae, Moraceae, and Malvaceae. NMDS demonstrated the environmental variables most highly correlated with plant species distribution among the sites were altitude, humidity, light intensity, slope aspect and air temperature. Results also highlighted that fire and human disturbance likely play a significant role affecting biodiversity and vegetation characteristics in this forest ecosystem.Keywords: Batukahu Nature Reserve; environmental correlates; tropical forest; understorey
AUTEKOLOGI PURNAJIWA (EUCHRESTA HORSFIELDII (LESCH.) BENN. (FABACEAE) DI SEBAGIAN KAWASAN HUTAN BUKIT TAPAK CAGAR ALAM BATUKAHU BALI Sutomo -; Laily Mukaromah
Jurnal Biologi Udayana Vol 14 No 1 (2010): Jurnal Biologi
Publisher : Program Studi Biologi, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Udayana

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Purnajiwa, which lives in highland jungles in Bali, is a famous medicinal plant in Bali and its presence in the wild is now under threat due to over exploitation and the destruction of its habitat. Batukahu nature reserves are one of its remaining habitats. This preliminary study aimed to describe purnajiwa’s habitat in Batukahu nature reserves. Purnajiwa was found in shaded areas with light intensity range from 55-65%. It grows under the shading of Laportea sp., Ficus sp., Syzygium zollingerianum, and Sauraria sp. Purnajiwa grows on soil with 6,7-6,8 range of pH with litter thickness of 3-7 cm. Purnajiwa also associated with the surrounding understorey vegetation such as Diplazium proliferum (IVI = 54,6) and Oplismenus compositus L. (IVI = 40). Result from this study gave usefull information for the purpose of its acclimatization and propagation in ex-situ conservation for its sustainable resources.
Invasive Plant Species in the Disturbed Forest of Batukahu Nature Reserve, Bali, Indonesia Mukaromah, Laily; Imron, Muhammad Ali
BIOTROPIA Vol. 27 No. 1 (2020): BIOTROPIA Vol. 27 No. 1 April 2020
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (273.646 KB) | DOI: 10.11598/btb.2020.27.1.933

Abstract

Patterns of invasive plant distribution and their underlying mechanisms are complex and vary with spatial scale. Within the mountainous tropical ecosystems of Bali Island, local-scale patterns of invasive plants are still poorly understood. This paper aimed to detect and investigate the presence of invasive species and to evaluate their relative abundance linked to forest site conditions along an elevation range on Mount Pohen, Batukahu Nature Reserve, Bali, Indonesia. To identify the importance of environmental disturbances on species invasion, disturbance-environmental factors and species-environmental relationships were also measured and examined. Using a stratified random sampling approach, 78 vegetation plots of 2 × 2 m size were established across four forest sites. Ten invasive plant species belonging to ten genera and five families were identified. Of these invasive species, 40% were herbs, while shrubs and grasses each comprised 30%. Austroeupatorium inulaefolium had the highest frequency (45% of plots), followed by Ageratina tipatia and Brachychaeta reptans (40% of plots each), Melastoma malabathricum (37%), and Calliandra calothyrsus (27%). Austroeupatorium inulaefolium was the most abundant invader, followed by Ageratina tipatia, and the remaining invasive species were Pennisetum purpureum, Calliandra calothyrsus, Imperata cylindrica, Brachychaeta reptans, Melastoma malabathricum, Lantana camara, Bidens pilosa, and Blumea lacera. The distribution of invasive plants was strongly linked to the disturbance level of their respective habitats. The largest numbers of invasive plants were present in burnt sites close to forest edges with direct anthropogenic influence, while the undisturbed forest was the least invaded site. Furthermore, most invasive species mainly occurred at low elevations up to 1,600 m a.s.l. and were rarely found at higher elevations. However, a few invasive species, such as Austroeupatorium inulaefolium and Melastoma malabathricum, were able to colonize the highest altitude (2,035 m a.s.l.), and, to a lesser degree, Ageratina tipatia and Brachychaeta reptans were also distributed at high altitudes (1,950 m a.s.l. and 1,972 m a.s.l., respectively). This study provides a fine-scale analysis of invasive species distribution, which will serve as a basis for conservation purposes, especially for strategic planning regarding the detection and management of invasive alien plants.
Co-Authors Muhammad Ali Imron Sutomo -