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Roni Koneri
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Jurusan Biologi FMIPA Universitas Sam Ratulangi
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Jurnal Bios Logos
Published by Universitas Sam Ratulangi
ISSN : 20889569     EISSN : 26563282     DOI : https://doi.org/10.35799/jbl.11.2.2020.28153
Core Subject : Health, Science, Agriculture,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology Medicine & Pharmacology
JURNAL BIOS LOGOS is the journal published by Department of Biology, Faculty of Mathematics and Natural Sciences, Sam Ratulangi University. The aims of the journal are to publish original research papers and article review in biology science i.e. botany, zoology, molecular biology, microbiology, ecology, diversity and conservation, taxonomy and biogeography. BIOS LOGOS is published two times per year (February and August)
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Pertanian dan Biologi (Lain-Lain)
Articles 4 Documents
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Search results for , issue "vol. 16 no. 2 (2026): jurnal bios logos" : 4 Documents clear
Understory Crop Diversity in Coconut-Based Agroforestry (A Case Study of Ongkaw Dua Village, Sinonsayang District, South Minahasa Regency) Pangemanan, Euis F.S.; Kalangi, Josephus I.; Saroinsong, Fabiola B.
JURNAL BIOS LOGOS Vol. 16 No. 2 (2026): JURNAL BIOS LOGOS
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/ydv94242

Abstract

Coconut-based agroforestry systems are a form of land use that integrates trees with crops. The presence of understorey plants in this system plays an important ecological and economic role. This study aims to identify the types, analyze the diversity, and study the habitus of understorey plants growing under coconut trees. The method used is the plot method by creating 10 x 10 meter observation plots placed in agroforestry areas. The study's results identified 31 types of understorey plants, belonging to various habits, including herbs, shrubs, lianas, and epiphytes, originating from 23 families. This high diversity indicates that coconut-based agroforestry systems are capable of creating microhabitats that support the conservation of native flora. Most of the understory plants also have potential as food and medicinal plants, which adds to the economic value of this cultivation system. The results of this study demonstrate that coconut-based agroforestry is not only commercially productive but also makes a significant contribution to biodiversity conservation.
The Relationship between Oxygen Saturation and Forced Vital Capacity (FVC) of the Lungs in Older Adults N. A Engka, Joice; A. Assa, Youla; Polii, Hedison
JURNAL BIOS LOGOS Vol. 16 No. 2 (2026): JURNAL BIOS LOGOS
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/z1k90t47

Abstract

Oxygen saturation in older adults tends to decline as a result of physiological changes in the lungs and the cardiovascular system. In this population, forced vital capacity (FVC) of the lungs decreases due to alterations in lung elasticity, respiratory muscle weakness, and increased resistance in the small airways. Evaluating the relationship between these two parameters is important for understanding age-related physiological changes in respiratory function. This study aimed to analyze the relationship between oxygen saturation and forced vital capacity in older adults. This study employed an analytical observational design with a cross-sectional approach. The study subjects consisted of 72 older adults who met the inclusion and exclusion criteria and were selected using purposive sampling. Oxygen saturation was measured using a standard pulse oximeter, while forced vital capacity was assessed using a digital spirometer. Data were analyzed using a correlation statistical test with a predetermined level of significance. The results showed that there was no significant relationship between oxygen saturation and forced vital capacity in older adults (p > 0.05). Although variations in oxygen saturation and FVC values were observed among the study subjects, the relationship between the two variables did not demonstrate a statistically significant correlation. This study concludes that oxygen saturation is not significantly associated with forced vital capacity in older adults; therefore, these two parameters may be considered independent indicators in the assessment of pulmonary function in the elderly population.
Community Structure of Libellulidae (Insecta: Odonata) Across Four Habitat Types in Jambi Province, Indonesia Janra, Muhammad; Fauzi, Ibrahim; Aisyah, Rihadatul; Alfajri, Negi
JURNAL BIOS LOGOS Vol. 16 No. 2 (2026): JURNAL BIOS LOGOS
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/da9mft89

Abstract

This study aims to analyze the community structure of Libellulid dragonflies at four habitats, i.e., settlement, forest, oil palm, and rubber plantations located in Jambi Province, Indonesia. A survey was conducted from August 2017 to February 2018 in the settlement area and at 12 plot pairs of 50×50 m in the other three habitats, using a visual survey method with a photographic approach. Community structure was analyzed using Shannon–Wiener diversity index (H′), Simpson dominance index (D), evenness index (E), and Sorensen similarity index (S). The survey recorded 36 Libellulidae species across 24 genera, with the most records at the rubber plantation (23 species) and the fewest at the settlement (11 species). The highest diversity was observed at the rubber plantation (H’=2.853), followed by the oil-palm plantation (H’=2.536), the forest (H’=2.377), and the settlement (H’=1.988). The settlement was observed to have the highest disturbances (D=0.202), while the rubber plantation was presumably the stable one (D=0.070). The Libellulid individuals were most evenly distributed at the rubber plantation (E=0.910) and the forest (E=0.901). Oil palm and rubber plantations had the most similar Libellulid community (S=0.711), whereas forest and rubber plantations had the least similar community (S=0.270). In this study, settlement had no typical species. This study suggests that differences in vegetation complexity and disturbance levels may influence the community structure of Libellulidae.
Isolation and Identification of Bacterial Isolate Associated with the Plastisphere from Plastic Waste at the Sumompo Landfill, Manado, Indonesia Halawa, Erminda; Mantiri, Feky Recky; Tallei, Trina Ekawati
JURNAL BIOS LOGOS Vol. 16 No. 2 (2026): JURNAL BIOS LOGOS
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/ss253v85

Abstract

Plastic waste accumulation has become a major environmental concern, particularly in landfill ecosystems where plastic surfaces serve as habitats for microbial communities known as the plastisphere. This study aimed to isolate and identify bacterial isolate associated with the plastisphere associated with plastic waste collected from the Sumompo Landfill, Manado City, Indonesia. Plastic bag (SPK) and plastic bottle (SPB) samples were processed using serial dilution and spread plate techniques on Nutrient Agar (NA), followed by bacterial purification and molecular identification based on 16S rRNA gene analysis. A pure bacterial isolate was successfully obtained only from the plastic bag sample, whereas the plastic bottle sample failed to yield a representative isolate due to contamination. PCR amplification produced a 16S rRNA gene fragment of approximately 1400–1500 bp. After sequence trimming, a 989 bp sequence showed 99.72% similarity to Bacillus cereus strain ATCC 14579 using BLAST analysis. Phylogenetic analysis with the Neighbor-Joining method confirmed its placement within the Bacillus cereus clade with 100% bootstrap support. These findings identify Bacillus cereus as a member of the plastisphere bacterium in the Sumompo Landfill and provide baseline data for future investigations of landfill plastisphere microbial diversity.

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