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Integrating BSF larvae for the sustainable bioconversion of banana peels and sprout hulls waste
Rizkawati, Vina
; Andhini, Shabrina Lathiifah
; Noer, Mohamad Isnin
; Yudistira, Dwi Harya
; Kurniati, Tri Handayani
; Lisanti, Elsa
; Komala, Ratna
; Herlin, Weri
The management of organic waste presents a significant challenge in Indonesia, especially fruit and vegetable by-products. Black Soldier Fly (BSF, Hermetia illucens) larvae offer an effective solution due to their high potential for organic waste conversion. This study investigated the efficacy of BSF larvae in reducing and bioconverting organic waste composed of banana peels and sprout hulls, and examined the influence of EM4 fermentation on larval growth performance. Waste Reduction Index (WRI...
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Morphological and genetic identifications of Spirulina based on 16S rRNA gene
Spirulina is a microalga with spiral or linear trichome shapes that has potential in industrial and food sectors due to its rich nutritional content. Spirulina can live in various aquatic habitats with different environmental conditions. Differences in cultivation environments can affect the morphological characteristics of Arthrospira due to phenotypic plasticity, making morphology-based identification prone to errors. Therefore, molecular identification using the 16S rRNA gene for phylogenetic...
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Waterbirds as bioindicators of ecosystem health: seasonal dynamics in Tondano Lake, Indonesia
Waterbird diversity in Tondano Lake reflects ecological degradation caused by water-hyacinth invasion and sedimentation. This study analyzed the diversity and abundance of waterbirds in Tondano Lake, Indonesia, across wet (February-May) and dry (June-October) seasons in 2025 to assess their role as bioindicators of ecosystem health. Multi-season observations were carried out monthly along a 6.5 km transect at ten strategic points. Eight waterbird species from three families were recorded, with E...
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Assessment of genetic diversity in EMS-induced porang (Amorphophallus muelleri Blume) revealed by RAPD markers
Haritzah, Rendha Maulana
; Radita, Novia Fitri
; Ramadanti, Isma Salsabila
; Azzahro, Yusri Despa
; Wahyudi, Didik
; Resmisari, Ruri Siti
; Suyono
Increasing genetic diversity of porang through mutation is urgently needed since porang has low genetic diveristy. Therefore, this study aims to increase the genetic diversity of porang using ethyl methanesulfonate (EMS) and analyze the genetic diversity of porang using RAPD markers. Porang explants were subjected to in vitro EMS induction at various concentrations (control, 0.1%, 0.2%, 0.3%, 0.4%, and 0.5%) and evaluated after 35 days. DNA amplification was carried out using 20 RAPD primers. Ge...
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Evidence-based non-residential waste analysis to support 3R strategies and food recovery hierarchy: a case study in Solok Selatan
The amount of waste generation that increases without being accompanied by good waste management will cause pollution and decrease the aesthetic value of the environment. Non-residential waste originating from non-residential activities is also one of the contributors to waste entering the landfill. This study aims to analyze non-residential waste generation and composition as an evidence-based reference for each source in implementing the 3R concept and the Food Recovery Hierarchy (FRH). The nu...
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Utilization of cassava peel waste (Manihot esculenta) as substrate in the production of cellulase enzymes by Aspergillus niger
Cellulase enzymes is an enzyme that can hydrolyze cellulose into smaller sugar components. Cellulase enzymes are produced due to high demand, with 29.17% in the animal feed industry, 14.67% in the textile industry, and 26.17% in the paper industry. One method of producing cellulase enzymes is by utilizing the cellulolytic microorganism Aspergillus niger. This study aims to optimize cellulase enzyme production by Aspergillus niger through liquid fermentation on cassava peel substrate (Manihot esc...
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Synergistic cultures for resilient mercury bioremediation in ASGM leveraging microbial interactions for sustainable pollutant removal
The widespread use of mercury (Hg) in artisanal and small-scale gold mining (ASGM) necessitates effective bioremediation strategies. This study evaluated the mercury reduction capabilities of two bacterial strains, Bacillus subtilis and Pseudomonas aeruginosa, using real-world ASGM liquid waste. In a seven-day laboratory-scale experiment, we assessed the performance of single and mixed bacterial cultures under varying pH conditions. Our results show that B. subtilis was particularly effective, a...
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Integrating field inventory and in silico phylogenetic analysis of pteridophytes at Gandul Mount, Indonesia
Pteridophytes are vascular plants that are considered the most primitive plants because they only use spores to reproduce. Several major fern families exhibit distinctive morphological and ecological characteristics that support their taxonomic recognition. Pteridophytes represent an important component of tropical biodiversity, yet their diversity and evolutionary relationships in karst ecosystems remain poorly documented. This study aimed to integrate field inventory and in silico phylogenetic...
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Diversity of plankton species in different ecosystems on Beras Basah Island, Bontang, East Kalimantan
Imam Fadila, Muhammad
; Anjasmara, Aang Setyawan
; Rizal, Daisy Rahma
; Rusdi, Rismawaty
; Reynalta, Ricko
Beras Basah Island, located in the coastal waters of Bontang City, East Kalimantan, is a marine conservation area characterized by diverse coastal ecosystems, including marine waters, coral reefs, and seagrass beds. These ecosystems support various aquatic organisms, including plankton communities that play a key role in marine food webs. This study aimed to examine the composition, abundance, and diversity of plankton across three different ecosystems around Beras Basah Island. Sampling was con...
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Mangrove Biodiversity for Coastal Resilience and Sustainability: A Dynamic Case Study from Indonesia
Martuti, Nana Kariada Tri
; Jabbar, Abdul
; Irsadi, Andin
; Sidiq, Wahid Akhsin Budi Nur
; Melati, Inaya Sari
; Eldin Khair, Amar Sharaf
; Mutiatari, Dhita Pracisca
Mangrove degradation and socio-economic vulnerability in the Kendal coast require an integrated approach. The study used ecological surveys (mangrove vegetation analysis, avifauna) and socio-economic (n=186 households). Integrated Coastal Management (ICM) analysis and model were developed using a dynamic approach, encompassing problem identification, conceptual model formulation, and validation preparation. 14 mangrove species (H' index = 1.58–1.80) and 61 bird species (H' = 3.50) were found. Co...
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