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All Journal Bioindikator: Jurnal Biologi dan Pendidikan Biologi
Yuliantin
Pascasarjana Biologi Tumbuhan, Fakultas Matematika dan Ilmu Pengetahuan Alam, IPB University, Jln. Dramaga, Bogor, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Education Immunology & microbiology Medicine & Pharmacology

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Analisis Vegetasi Tumbuhan Bawah Metode Garis Menyinggung Dan Titik Menyinggung Di Hutan Kampus IPB Dramaga Taufik Arianto; Firman Ali Rahman; Masyarani Sulaiman; Yuliantin; Sulistijorini
Bioindikator: Jurnal Biologi dan Pendidikan Biologi Vol. 1 No. 2 (2024): Desember 2024
Publisher : Yayasan Tajuk Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71024/bioindikator/2024/v1i2/119

Abstract

The diversity of vegetation can reflect the vegetation structure of an area against information on species composition, distribution patterns, density patterns, frequencies, and species dominance to determine the important value index of the forest community composition of a plant species. This study aims to analyze understory vegetation in the IPB Dramaga Campus Forest using two main methods, namely line intercept and point intercept. Both methods are applied to compare the effectiveness of measuring ecological parameters such as density, frequency, dominance, and understory diversity index. The results showed that there were 10 types of plants with the line intercept method including Digitaria fuscencens, Spilanthes paniculata, Cleome vicicosa, Clitorea Ternatea, Digitaria longifora, Britaria reptans, Ageraitum conzoides, Imperacta clindraca, Hevea braziliensis, Paku. Meanwhile, in the tangent point method, 5 species were found at the research method line points as follows: Digitaria fuscencens, Spilanthes paniculata, Clitorea Ternatea, Digitaria longifora, Altherenthera philoxeoriides. The analysis of the importance value index in the tangent line method showed that Spilanthes paniculata dominated the understory vegetation with an importance value index of 145.91%, followed by Digitaria fuscencens (48.39%) and Digitaria longifora (40.58%). Meanwhile, in the tangent point method, Digitaria fuscencens had the highest importance value index of 69.46%, followed by Spilanthes paniculata (69.20%) and Clitorea ternatea (40.65%), with the lowest importance value index of Digitaria longifora (16.52%) and Altherenthera philoxeoriides (7.17%). The tangent line method is more effective in describing the horizontal distribution of vegetation, while the tangent point method provides high precision in estimating relative cover. The understory vegetation in this area is dominated by certain species that have high adaptation to the IPB University campus forest environment.
Analisis Vegetasi Tumbuhan Bawah Metode Garis Menyinggung Di Hutan Pendidikan Gunung Walat Firman Ali Rahman Ali; Taufik Arianto; Masyarani Sulaiman; Yuliantin; Sulistijorini
Bioindikator: Jurnal Biologi dan Pendidikan Biologi Vol. 1 No. 2 (2024): Desember 2024
Publisher : Yayasan Tajuk Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71024/bioindikator/2024/v1i2/120

Abstract

Gunung Walat Educational Forest is one of the ecosystems rich in biodiversity, including understory plants that play an important role in maintaining the ecological balance of the forest. This study aims to analyze understory vegetation in Gunung Walat Educational Forest using the line intercept method. This method was chosen because of its effectiveness in measuring the diversity, dominance, and distribution of understory plants in natural habitats. Data were collected by recording the types of plants that crossed the transect line, supplemented by measurements of density, frequency, and relative cover. The results showed that 16 types of understory plants were found in homogeneous and heterogeneous forest ecosystems including: Aghatis damara, Arenga undulatifora, Cinnanonum cintoc, Homalonema sp, Hornstedtia pinanga, Leea aquata indica, Melastoma malabathricum linn, Palmae, Pandanus furactum, Pinanna curunarri, Piper nigrum, Selaginella doederlinni, Shorea sp, Strubilentes crispus, Tetrastigma lanceolarium, and Zingiber zerumbe. The results showed that the number of understory plant species found in heterogeneous forests was higher than in homogeneous forests, with 17 and 15 species respectively. In homogeneous forests, the Selaginella doederleinii species dominates quantitatively with the highest relative density (46.26%), the highest relative frequency (39.70%), and the highest dominance (42.76%). This causes Selaginella doederleinii to have the highest important value index (INP) of 128.74%, followed by Tetrastigma lanceolarium (68.62%) and Homalonema sp (17.92%). The biodiversity of homogeneous forests in GWUF shows a high species diversity index (H’), which is an average of 4.27 with a species evenness of 1.45.
Co-Authors Firman Ali Rahman Firman Ali Rahman Ali Masyarani Sulaiman Sulistijorini Taufik Arianto