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Resources, Volume 14, Issue 8 (August 2025) – 3 articles

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30 pages, 1679 KiB  
Review
Advancing Circularity in Small-Scale Rural Aquaponics: Potential Routes and Research Needs
by Laura Silva, Francisco Javier Martinez-Cordero, Gösta Baganz, Daniela Baganz, Ariadne Hernández-Pérez, Eva Coronado and Maria Celia Portella
Resources 2025, 14(8), 119; https://doi.org/10.3390/resources14080119 - 23 Jul 2025
Abstract
Small-scale fisheries and aquaculture play a crucial role in securing food, income, and nutrition for millions, especially in the Global South. Rural small-scale aquaculture (SSA) is characterized by limited investment and technical training among farmers, diversification and dispersion of farms over large areas, [...] Read more.
Small-scale fisheries and aquaculture play a crucial role in securing food, income, and nutrition for millions, especially in the Global South. Rural small-scale aquaculture (SSA) is characterized by limited investment and technical training among farmers, diversification and dispersion of farms over large areas, reduced access to competitive markets for inputs and products, and family labor. Small-scale integrated circular aquaponic (ICAq) systems, in which systems’ component outputs are transformed into component inputs, have significant potential to increase circularity and promote economic development, especially in a rural context. We offer an integrated and comprehensive approach centered on aquaponics or aquaponic farming for small-scale aquaculture units. It aims to identify and describe a series of circular processes and causal links that can be implemented based on deep study in SSA and ICAq. Circular processes to treat by-products in ICAq include components like composting, vermicomposting, aerobic and anaerobic digestion, silage, and insect production. These processes can produce ICAq inputs such as seedling substrates, plant fertilizers, bioenergy, or feed ingredients. In addition, the plant component can supply therapeutic compounds. Further research on characterization of aquaponic components outputs and its quantifications, the impact of using circular inputs generated within the ICAq, and the technical feasibility and economic viability of circular processes in the context of SSA is needed. Full article
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25 pages, 1122 KiB  
Communication
From Resource Abundance to Responsible Scarcity: Rethinking Natural Resource Utilization in the Age of Hyper-Consumption
by César Ramírez-Márquez, Thelma Posadas-Paredes and José María Ponce-Ortega
Resources 2025, 14(8), 118; https://doi.org/10.3390/resources14080118 - 22 Jul 2025
Abstract
In an era marked by accelerating ecological degradation and widening global inequalities, prevailing patterns of resource extraction and consumption are proving increasingly unsustainable. Driven by hyper-consumption and entrenched linear production models, the global economy continues to exert immense pressure on planetary systems. This [...] Read more.
In an era marked by accelerating ecological degradation and widening global inequalities, prevailing patterns of resource extraction and consumption are proving increasingly unsustainable. Driven by hyper-consumption and entrenched linear production models, the global economy continues to exert immense pressure on planetary systems. This communication article calls for a fundamental paradigm shift from the long-standing assumption of resource abundance to a framework of responsible scarcity. Drawing from recent data on material throughput, on the transgression of planetary boundaries, and on the structural and geopolitical disparities underlying global resource use, this article highlights the urgent need to realign natural resource governance with ecological limits and social justice. A conceptual framework is proposed to support this transition, grounded in principles of ecological constraint, functional sufficiency, equity, and long-term resilience. The article concludes by outlining a forward-thinking research and policy agenda aimed at fostering sustainable and just modes of resource utilization in the face of growing environmental and socio-economic challenges. Full article
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13 pages, 639 KiB  
Article
Forecasting Potential Resources of Humic Substances in the Ukrainian Lignite
by Serhiy Pyshyev, Denis Miroshnichenko, Mariia Shved, Volodymyr Riznyk, Halyna Bilushchak, Olexandr Borisenko, Mikhailo Miroshnychenko and Yurii Lypko
Resources 2025, 14(8), 117; https://doi.org/10.3390/resources14080117 - 22 Jul 2025
Abstract
The present research deals with forecasting the potential content of humic acids (HA) in Ukrainian lignite based on the coal’s physicochemical characteristics. The focus is on developing an experimental–statistical model that considers moisture content, volatile matter yield, and calorific value of lignite. The [...] Read more.
The present research deals with forecasting the potential content of humic acids (HA) in Ukrainian lignite based on the coal’s physicochemical characteristics. The focus is on developing an experimental–statistical model that considers moisture content, volatile matter yield, and calorific value of lignite. The development of the humic acid yield’s dependence on some lignite parameters is based on both original research data and literature sources. Humic acids were extracted using alkaline solutions, and HA content was calculated for various lignite deposits in Ukraine. The adequacy check of the model showed a relative prediction error of up to 12%, indicating good agreement between the model and experimental data. The highest potential yield of humic acids was recorded for lignite from the Dnipropetrovsk region (Dnieper-Donets Basin), amounting to 53–56 wt.%. The presented results demonstrate the feasibility of using mathematical forecasting to assess the industrial potential of humic acid production from lignite. Full article
(This article belongs to the Special Issue Mineral Resource Management 2025: Assessment, Mining and Processing)
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