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All Journal BIOSFER : Jurnal Biologi dan Pendidikan Biologi Jurnal Biosense
Dagsy, Irqami Rachma Dwi
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Education Immunology & microbiology Medicine & Pharmacology Public Health

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STUDI KUALITAS AIR SUNGAI KALILO, BANYUWANGI: ANALISIS BIOLOGICAL OXYGEN DEMAND (BOD) DAN IMPLIKASINYA TERHADAP EKOSISTEM Kayumi Meilana, Yuristya; Dagsy, Irqami Rachma Dwi
JURNAL BIOSENSE Vol 8 No 3 (2025): Edisi Juli 2025
Publisher : Program Studi Biologi, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas PGRI Banyuwangi, Jalan Ikan Tongkol No 01, Telp (0333) 421593, 428592 Banyuwangi 68416

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36526/biosense.v8i3.5257

Abstract

The Kalilo River in Banyuwangi plays a vital role in supporting ecosystems and community activities but faces ecological pressures due to human activities. This study aims to analyze the Biological Oxygen Demand (BOD) levels at the upstream and downstream sections of the Kalilo River and their impact on the ecosystem. The research was conducted in December 2024 using standard BOD testing methods through a quantitative and qualitative approach. Water samples were collected from Grogol Village (upstream) and Kampung Ujung Neighborhood (downstream) and tested at the Environmental Laboratory of Banyuwangi Environmental Agency. Results showed that BOD levels were 0.32 mg/L upstream and 1.33 mg/L downstream. Although both sites met the class II water quality standards (≤ 3 mg/L) according to Government Regulation No. 22 of 2021, the higher BOD level downstream indicated organic pollution from domestic activities. The ecological impact includes reduced dissolved oxygen levels, potentially disrupting aquatic life. This study highlights the importance of waste management and continuous water quality monitoring to ensure the sustainability of the Kalilo River ecosystem.
KEANEKARAGAMAN DAN POLA DISTRIBUSI BIVALVIA DI TELUK PANGPANG BLOK JATI PAPAK TAMAN NASIONAL ALAS PURWO BANYUWANGI Zahro, Lutfiatus; As’ari, Hasyim; Ardyansyah, Fuad; Dagsy, Irqami Rachma Dwi; Firmansyah, Moh.
JURNAL BIOSENSE Vol 7 No 01 (2024): Edisi Juni 2024
Publisher : Program Studi Biologi, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas PGRI Banyuwangi, Jalan Ikan Tongkol No 01, Telp (0333) 421593, 428592 Banyuwangi 68416

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36526/biosense.v7i01.3850

Abstract

Alas Purwo National Park in Banyuwangi is one of the conservation areas of mangrove forest potential big enough one of them is the Teluk Pangpang Blok Jati Papak which is the intertidal area, a lot of marine life that live in the region one of which is the bivalves. This study aims to determine diversity and the distribution pattern of bivalves in the Teluk Pangpang Blok Jati Papak. This study was conducted in 25 Mei - June 1, 2016. Determination of the sampling method used in this research is purposive sampling. Sampling sites are divided into three stations, with the distance between stations is 500 m, in each station there are four transects on each transect contained 10 plot. set the distance between transects 15 m and the distance between the plots 5 m with a plot measuring 2 × 2m. Measurement parameters abiotic do is measure temperature, salinity and pH. The research found 8 species of bivalves that Anomalodiscus squamosus, Placamen chlorotica, Pitar citrus, Chamelea gillina, Mactra grandis, Hiatula chinensis, Tellina timorensis, Anadara granosa. An index value of diversity bivalves in the Teluk Pangpang Blok Jati Papak categorized as low, with the highest index value at station 1 at 0.766 and the lowest at station 2 by 0.66. Biavalvia distribution patterns in the region are random in species Anomalodiscus squamosus, Pitar citrus, Chamelea gillina, Mactra grandis, Hiatula chinensis, Tellina timorensis, Anadara granosa and are clustered in Placamen chlorotica species.
Isolasi dan Uji Antagonistik Bakteri Endofit Akar Tanaman Padi Terhadap Pertumbuhan Fungi Pyricularia oryzae Penyebab Penyakit Blas Dagsy, Irqami Rachma Dwi; As'ari, Hasyim
Biosfer : Jurnal Biologi dan Pendidikan Biologi Vol. 10 No. 2 (2025): BIOSFER: Jurnal Biologi dan Pendidikan Biologi
Publisher : Program Studi Pendidikan Biologi, FKIP Unpas,

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23969/biosfer.v10i2.32984

Abstract

Penyakit blas yang disebabkan oleh Pyricularia oryzae merupakan salah satu masalah utama pada produksi padi di Indonesia, dengan potensi kerugian hasil mencapai 90% pada varietas rentan. Pengendalian penyakit blas masih bergantung pada varietas tahan dan penggunaan fungisida kimia. Penggunaan fungisida kimia memiliki dampak negatif terhadap pencemaran lingkungan, sehingga diperlukan penangan secara hayati dengan memanfaat bakteri endofit yang mempunyai kemampuan sebagai agen biocontrol.  Penelitian yang dilakuakn bertujuan untuk mengisolasi dan mengetahui aktivitas biokontrol berbagai bakteri endofid  akar tanaman padi terhadap fungi P. oryzae penyebab penyakit blas. Metode penelitian meliputi isolasi bakteri endofit dari akar padi varietas IR-46, dan dilakukan karakterisasi secara makroskopik, mikroskopik, uji biokimia, serta pengujian aktivitas biologis (produksi IAA dan pelarutan fosfat). Uji antagonistik bakteri endofit akar padi dilakukan dengan menggunakan metode kultivasi bersamaan pada media PDA serta mengukur zona hambat terbentuk di sekitar koloni bakteri dan fungi uji, yang dilakukan pengulangan 3 kali. Hasil isolasi dan karaterisasi ditemukan 3 tiga isolat yaitu dari genus Microbacterium, Enterobacter, dan Stenotrophomonas. Hasil  uji antagonis dari ke tiga isolat bakteri endofit akar padi yang di isolasi didapatkan zona hambat terbesar pada genus Stenotrophomonas (10,6 ± 1,05 mm), diikuti Microbacterium (7,13 ± 0,75 mm), dan Enterobacter (4,87 ± 0,76 mm). Kesimpulan penelitian adalah isolat Stenotrophomonas memiliki potensi sebagai agen biokontrol penyakit blas pada padi, dan berpotensi sebagai strategi pengendalian hayati ramah lingkungan dalam mendukung sistem pertanian organik berkelanjutan
Co-Authors Ardyansyah, Fuad As'ari, Hasyim As’ari, Hasyim Firmansyah, Moh. Kayumi Meilana, Yuristya Zahro, Lutfiatus