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All Journal Spizaetus: Jurnal Biologi dan Pendidikan Biologi
Laynurak, Yoseph M.
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Education Immunology & microbiology Other

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Keanekaragaman Jenis Makroalga di Pantai Afuik, Desa Dualaus, Kabupaten Belu Manewalu, Agnes; Laynurak, Yoseph M.; Duhan, Gaudensius U.U.B.
Spizaetus: Jurnal Biologi dan Pendidikan Biologi Vol 6 No 3 (2025): Spizaetus: Jurnal Biologi dan Pendidikan Biologi
Publisher : Program Studi Pendidikan Biologi, FKIP, Universitas Nusa Nipa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55241/spibio.v6i3.632

Abstract

Afuik Beach, Dualaus Village, Belu Regency, is a coastal area that has the potential for macroalgae biodiversity. This research was conducted to determine the species richness, diversity, and utilization of macroalgae by the local community. The research was conducted in February–March 2025 using the line transect method with 20 transect lines of 25 m in length and a questionnaire survey to the community. Data were analyzed quantitatively using diversity, richness, dominance, uniformity, abundance and Importance Value Index indices, while qualitatively based on questionnaire results. The research results found nine types of macroalgae from three divisions: Chlorophyta (Caulerpa racemosa, C. sertularoides, Halimeda opuntia, H. cuneata, Boergesenia forbesii), Phaeophyta (Sargassum binderi, Padina gymnospora, Turbinaria ornata), and Rhodophyta (Gracilaria coronopifolia). The total number of individuals obtained was 836 with the dominance of Sargassum binderi (364 individuals). The diversity index value (H’=1.54) is classified as moderate, the richness index (1.18) is low, the dominance index (0.287) is low, the evenness index (0.171) is small, the total abundance index (0.176 ind/m2), and the highest INP (70.87). The questionnaire results showed that the community only uses G. coronopifolia as a local vegetable (“Gama/Kama”), with limited economic contribution. Each type found has different characteristics and benefits, the quality of the water also has a great influence on diversity so that the quality of a suitable water environment is a determining factor for the growth and development of macroalgae.
Keanekaragaman Gastropoda di Pantai Muko Wujo Kecamatan Larantuka Kabupaten Flores Timur Malik, Margaretha; Laynurak, Yoseph M.; Semiun, Chatarina Gradict
Spizaetus: Jurnal Biologi dan Pendidikan Biologi Vol 6 No 1 (2025): Spizaetus: Jurnal Biologi dan Pendidikan Biologi
Publisher : Program Studi Pendidikan Biologi, FKIP, Universitas Nusa Nipa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55241/spibio.v6i1.480

Abstract

Gastropods act as environmental bioindicators because they are sensitive to changes in the aquatic environment. The purpose of this study was to determine the diversity of gastropod species on Muko Wujo Beach. Determination of sampling points using the purposive sampling method. Samples were taken at two different stations based on human activities. The stages in collecting data on gastropod species include observing gastropods found in a 1x1 m plot, counting the number, and then recording it for identification purposes. In addition, environmental parameters, namely temperature and pH, were measured. Data on gastropod species and environmental parameters were then analysed qualitatively and quantitatively. Qualitative analysis was carried out by describing the morphological characteristics of gastropods, and identification was carried out using the help of scientific articles and internet websites. Quantitative analysis was carried out by calculating the diversity index, dominance index and similarity index of gastropod species. The results showed that 29 types of gastropods were found on Muko Beach, Larantuka District, East Flores Regency, which were divided into 14 families and 7 Orders. The diversity index, dominance index, and similarity index of gastropod species on Muko Wujo Beach were classified as moderate.
Co-Authors Chatarina Gradict Semiun Duhan, Gaudensius U.U.B. Malik, Margaretha Manewalu, Agnes