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All Journal Journal of Tropical Biodiversity and Biotechnology Martabe : Jurnal Pengabdian Kepada Masyarakat Sarwahita : Jurnal Pengabdian Kepada Masyarakat Kumawula: Jurnal Pengabdian Kepada Masyarakat Best Journal (Biology Education, Sains and Technology) Community Development Journal: Jurnal Pengabdian Masyarakat Biocaster : Jurnal Kajian Biologi BIO-CONS: Jurnal Biologi dan Konservasi Engagement: Jurnal Pengabdian Kepada Masyarakat
Puji Prastowo, Puji
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Religion Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Energy Environmental Science Health Professions Immunology & microbiology Public Health Social Sciences Other

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Identifikasi Mikroplastik pada Insang dan Saluran Pencernaan Ikan Nila (Oreochromis niloticus) di Danau Toba Kabupaten Simalungun Situmorang, Erika Putri Octavani; Prastowo, Puji; Sudibyo, Mufti
Biocaster : Jurnal Kajian Biologi Vol. 6 No. 1 (2026): January (In Progress)
Publisher : Lembaga Pendidikan, Penelitian, dan Pengabdian Kamandanu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/biocaster.v6i1.964

Abstract

Microplastic pollution in the waters of Lake Toba has the potential to accumulate in aquatic biota, including tilapia (Oreochromis niloticus) cultivated in floating net cages. The presence of microplastics in aquatic organisms is an important concern, because it has the potential to disrupt the balance of aquatic ecosystems and pose a risk to food security for humans. This study aims to identify the shape and color of microplastics in the gills and digestive tract of tilapia, as well as analyze the differences in abundance between the two organs. The research was carried out in June-August 2025 using a quantitative descriptive method. Fish samples were taken from three stations in the waters of Lake Toba, Simalungun Regency, namely tourist areas, boat transportation activities, and residential areas. Microplastic identification was performed visually using a microscope after the degradation of organic matter by the Fenton method. The results showed that the abundance of microplastics in the gill organs was 32 particles/individual, while in the digestive tract as many as 31 particles/individual. The microplastics found are dominated by fibers, fragments, and films with the main colors being green, black, red, brown, and transparent. The results of the independent sample t-test showed a value of p = 0.787 (p > 0.05) which indicated that there was no significant difference in microplastic abundance between the gills and the gastrointestinal tract. These findings confirm that microplastics have been distributed relatively evenly in tilapia organs, so that they have the potential to have an impact on the health of Lake Toba's aquatic ecosystem and food safety from aquaculture fisheries.
Keanekaragaman Serangga Berpotensi Penyerbuk pada Tanaman Jambu Biji (Psidium guajava L.) Ivanka, Della; Prastowo, Puji
Biocaster : Jurnal Kajian Biologi Vol. 6 No. 1 (2026): January (In Progress)
Publisher : Lembaga Pendidikan, Penelitian, dan Pengabdian Kamandanu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/biocaster.v6i1.1000

Abstract

Pollinator insects have an important role in the success of plant reproduction, but information on the diversity of pollinating insects in guava plants in Tanjung Anom Village is still limited. This study aims to determine the diversity, dominance, distribution pattern, and differences in the presence of potentially pollinating insects in guava plants (Psidium guajava L.) between morning and evening in Tanjung Anom Village, Pancur Batu District, Deli Serdang Regency. The research was carried out from June to August 2025. The selection of sample trees was carried out by purposive sampling, while the observation of pollinating insects used the scan sampling method which was carried out four times with an interval of one week in the morning and evening. The results of the study show that there are nine species of insects with potential pollinators that belong to three orders and four families. The level of diversity is classified as moderate (H' morning = 1.80; H' afternoon = 2.08), while the dominance level was low (C morning = 0.16; C afternoon = 0.11). Distribution pattern analysis showed that five species had a grouping pattern, namely Ischiodon scutellaris, Apis cerana, Tetragonula laeviceps, Xylocopa confusa, and Nomia sp., while four species showed a uniform distribution pattern, namely Anomala sp., Eumerus sp., Apis dorsata, and Xylocopa latipes. The results of the t-test showed a significant difference in the presence of pollinating insects between morning and evening with a p value of < 0.05. These findings show that the difference in the time of daily activity affects the structure of the pollinating insect community in guava plants. Therefore, the results of this study can be used as the basis for agroecosystem management, especially in the regulation of cultivation practices to increase pollination effectiveness and plant productivity.
Studi Ekologi Serangga Berpotensi Hama pada Tanaman Jambu Biji (Psidium guajava L.) di Desa Tanjung Anom Kecamatan Pancur Batu, Deli Serdang Citra, Umi Diana; Prastowo, Puji
Biocaster : Jurnal Kajian Biologi Vol. 6 No. 1 (2026): January (In Progress)
Publisher : Lembaga Pendidikan, Penelitian, dan Pengabdian Kamandanu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/biocaster.v6i1.1001

Abstract

Pest attacks are one of the main challenges in the management of guava plantations that can hinder plant productivity. This study aims to determine the diversity, dominance, distribution pattern, and association of insects with potential pests in guava plants (Psidium guajava L.) in Tanjung Anom Village, Pancur Batu District, Deli Serdang Regency. The research was carried out from June to August 2025. The selection of tree samples was carried out by purposive sampling, insect observation using the census method, and insect collection using the hand sorting and yellow sticky trap method which was carried out four times. The results of the study found 2,848 insect individuals from 10 species, 8 families, and 3 orders. The value of the diversity index (H') was 1.67 in the medium category, while the dominance index (C) was 0.22 in the low category. The distribution pattern of insects includes clustered distribution (5 species, namely Bemisia tabaci, Aphis gossypii, Ferrisia virgata, Planococcus sp., and Metisa sp.), uniform (4 species, namely Strepsicrates sp., Bactrocera dorsalis, Bothrogonia sp., and Empoasca sp.), and random (1 species, namely Siphanta sp.). Associations showed that there were 47% of very high associations (Oi = 1) and 4% of very low associations (Oi = 0) indicating no association.
Co-Authors Agna, Radina Nur Amdayani, Susilawati ANJANING KUSUMA MARPAUNG, DWI RATNA Ayu Putri Ningsih Citra, Umi Diana Daulae, Abdul Hakim Eddiyanto Eddiyanto Eko Prasetya, Eko Fauziyah Harahap Hasibuan, Hanisah Huda Panggabean, Nurul Hutahaean, Harvei Desmon Ivanka, Della Kabeakan, Feri Yuni Kabeakan, Feri Yuni Asiyah Lazuardi Lazuardi Mufti Sudibyo, Mufti Muhammad Fariz Muslim Muslim Muslim Mutiara Agustina Nst Nasution, Aswarina Nasution, Lia Mardiana Panggabean, Nurul Huda Said . Iskandar Septiani, Findi Sihite, Onggal Sihombing, Vivin Ronatio Situmorang, Erika Putri Octavani Sri Adelila Sari Sri Adelila Sari Syahputra, Ricky Andi Syarifuddin Syarifuddin Ulfa Nuzalifa, Yossie Yuanita Rachmawati Yusuf, Yusnaeni Zuhairiah Nasution, Zuhairiah