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All Journal Biosel: Biologi Science and Education Chemistry Indonesian Journal of Chemical Research Biopendix: Jurnal Biologi, Pendidikan dan Terapan Agrikan: Jurnal Agribisnis Perikanan Barakuda 45 JUSTE (Journal of Science and Technology) Innovative: Journal Of Social Science Research
Ismail, Irwan
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Bioakumulasi Logam Berat Merkuri (Hg) Pada Mangrove Jenis Rhizophora Mucronata Di Teluk Kayeli Kabupaten Buru Ismail, Irwan; Mangesa, Rosita; Irsan, Irsan
Biosel Biology Science and Education Vol. 9 No. 2 (2020): BIOSEL (Biology Science and Education: Jurnal Penelitian Sains dan Pendidikan)
Publisher : INSTITUT AGAMA ISLAM NEGERI AMBON

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (479.031 KB) | DOI: 10.33477/bs.v9i2.1637

Abstract

Kayeli Bay is a water in Buru Regency which has very important value in terms of ecological and economic functions. During its development, the ecosystem in Kayeli Bay bears the burden of pollution, especially heavy metal mercury as a result of the people's gold mining on Buru Island which uses Hg to get pure gold. Hg can accumulate in the environment, especially deposited in the sediments in Kayeli Bay waters. Mangrove plants that generally grow in estuary and coastal environments are a place for sediment accumulation. This plant has the ability to absorb and accumulate heavy metals, one of which is R. mucronata. This study aims to analyze the concentration of heavy metal Hg in mangroves of R. mucronata and sediments, and to analyze the bioaccumulation of heavy metal Hg in R. mucronata in Kayeli Bay, Buru Regency. Samples were taken from 3 stations, namely the Anahoni River Estuary (Station I), the Wailata River Estuary (II Station) and the Waeapo River Estuary (III Station). Each station has 2 sampling points (replicates). Determination of the concentration of Hg metal in the sample using the CV AAS method. The average value of Hg concentration in the roots was higher than the bark and leaves of the mangrove R. mucronata, but the concentration was lower than the sediment and was still below the critical value of Hg for plants. The average value of sediment Hg concentration is still below the sediment quality standard. In this study, R. mucronata mangroves were excluder and phytostabilized, where there was a limitation on the absorption of heavy metal Hg from water and sediment and the most Hg accumulation was found in the roots. Keywords: Bioaccumulation, Mercury, Rhizophora mucronata, Kayeli Bay
Pemberian Pupuk Organik Cair (POC) Ekoenzim Terhadap Kepadatan Chlorella sp. Pada Skala Laboratorium Warayaan, Finansius Ferdi; Rahayaan, Saraswati; Wusuk, Rumiati; Ismail, Irwan
Innovative: Journal Of Social Science Research Vol. 5 No. 4 (2025): Innovative: Journal Of Social Science Research
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/innovative.v5i4.19701

Abstract

Mikroalga Chlorella sp。 Meskipun berpotensial sebagai pakan alami untuk akuakultur, namun media kultur sintetis seperti KW 21 memiliki harganya relatif mahal dan tidak ramah terhadap lingkungan. Penelitian ini menganalisis efektivitas pupuk organik cair (POC) dari ekoenzim berbasis limbah buah dan sayuran sebagai media kultur alternatif. Rancangan ACAK Lengkap (RAL) menggunakan empat perlakuan: Kontrol (KW 21 1 mL/L), POC 5, 10, dan 15 mL/L, masing -masing memiliki tiga pengulangan. Parameter utama adalah kepadatan sel harian selama 13 hari pengamatan. Hasil ANOVA menunjukkan bahwa perlakuan memiliki efek yang signifikan pada kepadatan sel (F = 9,321; p <0,001; r² = 0,704). Perlakuan POC ekoenzim 5 ml/L menghasilkan kepadatan tertinggi (7,227,77 x 10⁴ sel/mL) pada hari ke- 8, yang sangat berbeda nyata dari perlakuan lain. Kualitas air optimal untuk semua perlakuan. Dosis ekoenzim 5 ml/L telah terbukti efektif dan dapat menjadi media budidaya alternatif dan ramah lingkungan.
The Effect of Planting Depth on the Vegetative Growth of Caulerpa racemosa in a Tarpaulin Tank Cultivation System Ismail, Irwan; Dangeubun, Jane Lulinda; Madubun, Usman; Rahantoknam, Santi Penina Tua
Barakuda 45: Jurnal Ilmu Perikanan dan Kelautan Vol 7 No 2 (2025): November
Publisher : Fakultas Perikanan dan Ilmu Kelautan Universitas 17 Agustus 1945 Cirebon

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47685/barakuda45.v7i2.674

Abstract

Caulerpa racemosa is a type of green macroalgae with high economic value that has the potential to be cultivated intensively. This study aimed to evaluate the effect of planting depth on the vegetative growth of Caulerpa racemosa cultivated in a tarpaulin tank system. Three planting depths were tested: 20 cm, 40 cm, and 60 cm. Vegetative growth parameters observed included Absolute Growth in Weight, Absolute Growth in Stolon Length, and Absolute Growth in Ramuli Length over a defined cultivation period. The results indicated that the 60 cm planting depth yielded the highest vegetative growth, with mean weight reaching 137.67±3.21 g, stolon length 30.04±0.54 cm, and ramuli length 25.29±2.90 cm. Statistical analysis revealed a significant difference only in stolon length between the 60 cm and 40 cm treatments, while differences in weight and ramuli length were not statistically significant. Overall, the data suggest that a 60 cm planting depth provides a more stable microenvironment in terms of light intensity, water temperature, and protection from physical disturbances, thereby enhancing biomass accumulation and vegetative structure development in Caulerpa racemosa. Therefore, a planting depth of 60 cm is recommended as the optimal depth for cultivating Caulerpa racemosa in tarpaulin-based culture systems.
Co-Authors Banjar, Firman Cahya saputri Leisubun Dahlan, Rosmida R Dangeubun, Jane Lulinda Darwin . Diana Lindasari Waroy Irsan Irsan Kabau, Widyawati Koto, Saifuddin Lutur, Elen Marta Madubun, Usman Mangesa, Rosita Rahayaan, Saraswati Rumakabis, Mega Utami Samsia Umasugi, Samsia Siti Nuraisah, Siti Siti Tamher Tjoanda, Moses Tua Rahantoknam, Santi Penina Warayaan, Finansius Ferdi Wusuk, Rumiati Yusthinus T. Male _, Kasmawati