Conference Agenda

This study examines the dynamics of forest cover in Honduras between 2000 and 2018 and projects its economic and environmental implications through 2030. Land-use transition matrices were constructed by harmonizing forest categories (coniferous, deciduous, broadleaf, mangrove, and non-forest areas), and Markov chain models were applied to estimate persistence, losses, and gains. Economic valuation integrated net carbon stocks (tCO₂/ha) and ecosystem services (USD/ha) under voluntary market scenarios. The findings reveal a sustained decline in forest cover, particularly within broadleaf and deciduous ecosystems, with significant negative impacts on carbon reserves and ecosystem service values. Projections to 2030 suggest that, if current trends persist, Honduras may experience a substantial reduction in forest cover and its associated economic value, underscoring the urgent need for integrated conservation strategies and strengthened public policy interventions.

The study aimed to examine how green advertising, ecological concern, and perceived emotional value influenced organic purchase behavior among consumers in Chiclayo, while assessing the mediating role of attitudes toward organic products. A qua ntitative explanatory approach with a non-experimental, cross-sectional design was implemented. Data were collected from 168 recent organic-product buyers using a structured 5-point Likert questionnaire. PLS-SEM was employed, and the measurement model showed strong reliability and validity (outer loadings 0.753–0.920; Cronbach’s alpha 0.818–0.898; AVE 0.710–0.821; HTMT 0.640–0.884), with no problematic multicollinearity. The structural model demonstrated high explanatory power for attitudes (R2=0.727), which were drive n primarily by ecological concern (β=0.444; p<0.001; f2=0.405), followed by emotional value (β=0.337; p<0.001; f2=0.192), while green advertising contributed a smaller yet significant effect (β=0.200; p=0.031; f2=0.081). Attitudes, in turn, strongly predicted purchase behavior (β=0.747; p<0.001; R2=0.557) and significantly mediated the effects of all three antecedents on buying behavior. The findings indicated that strengthening attitudes was central to translating pro-environmental motivations and emotions into actual purchases, leading to recommendations focused on verifiable green communication, ethically framed emotional appeals, and future inclusion of situational barriers such as price, availability, and certification trust.

This research focused on the study of five septate concretions found in fluvio-colluvial deposits of the Crisnejas River, in the Aguas Calientes area (Eduardo Villanueva district, San Marcos province, Cajamarca region), with the aim of determining their formation conditions and their relationship to the Chicama Formation (Upper Jurassic). Using a descriptive and analytical methodology, which included fieldwork with georeferencing, macroscopic characterization, and laboratory petrographic analysis, it was determined that these structures correspond to authigenic diagenetic concretions, formed in situ within deep-sea, anoxic marine black shales. The samples exhibit an ellipsoidal morphology (12–18 cm), a smooth external surface of primary origin, and radial internal fractures (septa) filled by carbonates (calcite, dolomite, and aragonite) in early stages, and subsequently by iron oxides (hematite and jarosite) during late supergene oxidation events. The bituminous crust and the presence of relict pyrite indicate initial reducing conditions with a high organic matter content. Geological mapping revealed that the specimens originate from the Chicama Formation, exhumed and concentrated by the seasonal dynamics of the Crisnejas River, which acts as an erosive and transport agent, preserving primary textures through short-distance transport. The results confirm that the septarian concretions originated during early diagenesis through differential cementation and the circulation of carbonate fluids, with fracturing by syneresis associated with compaction. This study contributes to the understanding of diagenetic processes in Jurassic basins of northern Peru and highlights the value of these structures as paleoenvironmental and fluid evolution indicators.

Sustainable biodiesel production requires raw material sources that do not compete with the food chain. This study evaluated the technical feasibility of recovering sunflower oil from the waste products of fried vegetable snacks (potato, corn, and plantain) for use as an input in biodiesel production. The process was developed in two stages: (i) solid-liquid extraction with 96% ethanol at the laboratory level to determine the lipid content, and (ii) scale-up to pilot scale to evaluate yields and process stability. The results showed oil contents between 18.1% and 23.0% in the laboratory, depending on the type of snack. The pilot scale demonstrated equal or higher yields (up to 30% for potato chips), validating the efficiency of the process at a larger scale. The recovered oil, characterized as frying crude, has characteristics compatible with conventional transesterification routes (alkaline or acid) for biodiesel production. It is estimated that 100 kg of waste can generate approximately 25.5–28 kg of biodiesel, considering a conversion efficiency of 85%. This work positions the waste from fried snacks as a viable and scalable source of oil for second-generation biodiesel, contributing to the circular economy through the valorization of industrial waste.

Insufficiently treated fish processing effluents contain high concentrations of organic matter and suspended solids, posing a risk to coastal ecosystems. In this study, we extracted chitosan from Litopenaeus vannamei using fertilizer grade phosphoric acid for demineralization to avoid using mineral acids difficult to obtain in Peru. We evaluated the extracted chitosan as a coagulant for the primary treatment of effluents discharged at the Callao Bay. Increasing doses of chitosan were applied to an effluent sample and the water quality variables that must be met to comply with local discharge regulations were evaluated. After this primary treatment, the water met almost all the necessary standards to be discharged, opening the discussion on the potential contribution of chitosan treatment as an agent capable of delivering performance beyond what is expected of primary treatment. The potential role of chitosan for water treatment in Peru and the enabling factors to develop its production are discussed in the context of building circularity in the fishery business.

Microplastic (MP) pollution represents a global threat due to its persistence and ability to adsorb pollutants. This work presents a systematic literature review to evaluate the use of bioindicators in marine, terrestrial, and aerial ecosystems. The PICO methodology was used for the search string, and the PRISMA methodology for article selection in the academic databases Scopus and Web of Science (WoS), resulting in a total of 29 scientific articles. Bibliometric analysis was also performed using the Bibliometrix tool in the R statistical software. The results reveal a clear predominance of research in marine ecosystems, which represent most of the analyzed sample, followed by terrestrial and aerial environments. Regarding representative bioindicators by ecosystem, in the marine environment, bivalves such as Meretrix casta (55.04 ± 32.15 MPs/g) and cnidarians such as Actinia equina and Cassiopea xamachana stand out. In terrestrial environments, annelids such as Eisenia andrei and freshwater fish such as Squalius vardarensis stand out in lotic systems, while in the air, birds such as Apus apus (1.92 ± 0.72 MPs/Ind) are prominent. Regarding flora, the species Acanthus ilicifolius exhibits the highest bioaccumulation recorded in mangrove areas. Morphological analysis confirms that fibers are the predominant form in all the biotic matrices evaluated. However, despite the suitability of these organisms for environmental monitoring, the review reveals that the lack of standardized protocols hinders the comparison of results between regions. Therefore, the urgent need to implement uniform methodologies in future research is highlighted.