Person: Iñamagua Uyaguari, Juan Pablo
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Email Address
Birth Date
1985-07-10
ORCID
0000-0001-9975-2138
Scopus Author ID
57195552177
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Afiliación
Universidad de Cuenca, Cuenca, Ecuador
Universidad de Cuenca, Facultad de Ciencias Agropecuarias, Cuenca, Ecuador
Universidad de Cuenca, Departamento de Recursos Hídricos y Ciencias Ambientales, Cuenca, Ecuador
Universidad de Cuenca, Facultad de Ciencias Agropecuarias, Cuenca, Ecuador
Universidad de Cuenca, Departamento de Recursos Hídricos y Ciencias Ambientales, Cuenca, Ecuador
País
Ecuador
Research Projects
Organizational Units
Facultad de Ciencias Agropecuarias
El 21 de abril de 1982, por resolución del Honorable Consejo Universitario se establece la Facultad de Ciencias Agropecuarias, de la Universidad de Cuenca. La Facultad de Ciencias Agropecuarias es una institución formadora de talento humano en el área agronómica, a través de una educación de calidad, centrada en la investigación y vinculación con la colectividad. Los futuros profesionales médicos veterinarios zootecnistas e ingenieros agrónomos, durante su permanencia en las aulas y estudio de campo, desarrollan conocimientos científicos-tecnológicos, competencias y destrezas en procesos de producción agropecuaria. Se los prepara con el fin de preservar la salud de los animales y recursos naturales, fomentando la seguridad alimentaria, respetando el medio ambiente dentro del marco del Buen Vivir, englobado en las necesidades de la región y el país.
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Profesor (T)
Last Name
Iñamagua Uyaguari
First Name
Juan Pablo
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6 results
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Publication Planting trees in livestock landscapes to protect soil and water also delivers carbon sequestration(2023) Iñamagua Uyaguari, Juan Pablo; Smith, Pete; Fitton, NualaEcuador has committed to climate change mitigation by reducing greenhouse gas emissions from anthropogenic activities, including livestock production. This sector can also contribute to mitigation by increasing carbon sequestration and storage capacity through increasing tree coverage. Although feasible, tree cover expansion would require agricultural land, creating a conflict with food production, thus appropriate areas need to be selected, and the impacts on livestock production quantified. Following water protection legislation and soil protection guidelines, we use a combination of measurements on 100 farms with land cover datasets to identify suitable areas for increasing tree coverage in livestock landscapes. Land cover classification was performed in 2 km areas around 100 livestock farms in the coastal and Amazon regions in Ecuador. Riparian zones were identified following legislation and steepland pastures identified from a slope map. Pasture in riparian areas or steeplands (slope > 15%) were considered suitable for increasing tree coverage by restoration or silvopastoral systems (SPS). The impact of forest/silvopastoral on biomass production was quantified. Overall, 855 km of rivers were studied, between 1–18% of riparian areas were classified as pastures, whilst from the 85992 ha included in the land cover classification, 41668 ha were identified as steepland, 1–28% of steepland was covered by pastures. We estimate that steepland pasture conversion into forest could offset 1.8–10% of Ecuador’s annual GHG emissions from the agricultural sector, but its impacts could represent a decrease > 50% of pasture biomass production at landscape level. Transformation of riparian and steepland pastures into SPS, could deliver important carbon sequestration, with a reduction in pasture biomass production of less than 20%.Publication Use of unoccupied aerial systems to characterize woody vegetation across silvopastoral systems in Ecuador(2022) Torres, Jonatha; Sangoluisa, Pamela; Smith, Pete; Iñamagua Uyaguari, Juan Pablo; Green, David R.; Fitton, NualaThe trees in pastures are recognized for the benefits they provide to livestock, farmers, and the environment; nevertheless, their study has been restricted to small areas, making it difficult to upscale this information to national levels. For tropical developing countries, it is particularly important to understand the contribution of these systems to national carbon budgets. However, the costs associated with performing field measurements might limit the acquisition of this information. The use of unoccupied aerial systems (UAS) for ecological surveys has proved useful for collecting information at larger scales and with significantly lower costs. This study proposes a methodology that integrates field and UAS surveys to study trees on pasture areas across different terrain conditions. Our overall objective was to test the suitability of UAS surveys to the estimation of aboveground biomass (AGB), relying mainly on open-source software. The tree heights and crown diameters were measured on 0.1-hectare circular plots installed on pasture areas on livestock farms in the Amazon and Coastal regions in Ecuador. An UAS survey was performed on 1-hectare plots containing the circular plots. Field measurements were compared against canopy-height model values and biomass estimates using the two sources of information. Our results demonstrate that UAS surveys can be useful for identifying tree spatial arrangements and provide good estimates of tree height (RMSE values ranged from 0.01 to 3.53 m), crown diameter (RMSE values ranged from 0.04 to 4.47 m), and tree density (density differences ranging from 21.5 to 64.3%), which have a direct impact on biomass estimates. The differences in biomass estimates between the UAS and the field-measured values ranged from 25 to 75%, depending on site characteristics, such as slope and tree coverage. The results suggest that UASs are reliable and feasible tools with which to study tree characteristics on pastures, covering larger areas than field methods only.Publication Feeding and fertilization practices and greenhouse gas emissions in specialized dairy farms of Dos Pinos in Costa Rica(2016) Wattiaux, Michel A.; Jenet, Andreas; Casasola, Francisco; Guerra, Leonardo; Iñamagua Uyaguari, Juan PabloEmissions of methane (CH4) and nitrous oxide (N2O) based on the feeding systems of 104 dairy farms in Costa Rica were estimated using IPCC procedures. This study indicated that farmers’ decisions, which determine the feeding strategies for lactating cows, have a substantial impact on CH4 emissions per kg of milk. Lower CH4 emissions per kg milk were estimated on farms with high-producing cows consuming rations with lower neutral detergent fiber concentrations and higher amounts of concentrates. Hours spent in pasture did not influence estimated grass intake or CH4 emissions. However, higher feed efficiency appeared to be a key factor in reducing CH4 emissions per kg of milk. The study also showed that higher N2O emissions were associated with higher amounts of commercial nitrogen fertilizer application; however, the main source of N2O emissions was from the manure deposited during the grazing period. Future approaches to reduce farm gate emissions of CH4 per kg of milk in specialized dairy farms could include incorporating dietary fats in rations, feeding adequate amounts of concentrates and feeding forage at a more digestible stage. These findings are strongly influenced by the assumptions made in calculating CH4 and N2O emissions but do highlight the critical areas which affect greenhouse gas emissions.Publication Variabilidad intraespecífica en la calidad de semillas de especies forestales nativas en bosques montanos en el sur del Ecuador: Implicaciones para la restauración de bosques(2017) Palomeque Pesántez, Fanny Ximena; Maza Leon, Andrea Paola; Iñamagua Uyaguari, Juan Pablo; Günter, Sven; Hildebrandt, Patrick; Weber, Michael; Stimm, BerndOne of the most important aspects in efficient plant production for restoration purposes is seed quality and its variability. The main goal of this study was to evaluate seed parameters according to the rules of “International Seed Testing Association” among different mother trees or individuals of seven native tree species (Cedrela montana, Morella pubescens, Inga acreana, Tabebuia chrysantha, Ocotea heterochroma, Oreocallis grandiflora and Myrcianthes rhopaloides) in two mountain forests in the Southern of Ecuador. These species were selected based on the ecological, socioeconomic importance, and their high potential for restoration. From a total of 35 mother trees for all species, seeds were collected in their fructification periods, and in the laboratory the following seed parameters were analyzed: purity, seed weight, moisture content, and germination; in addition, the coefficient of velocity of germination was determined as well. The results showed an intraspecific similarity in each species for the majority of seed parameters. However, the seed weight showed a high intraspecific variability for all species. The germination parameter showed differences among individuals for C. montana, T. chrysantha, O. heterochroma and M. rophaloides. In regard to the coefficient of velocity of germination, individual of species such as O. grandiflora and I. acreana showed a high coefficient in contrast to the individuals of O. heterochroma and M. pubescens. The information generated in this study could be a first step in the formulation of guidelines for the mass plant production for restoration purposes.Publication Open access perpetuates differences between higher- and lower-income countries(2022) Iñamagua Uyaguari, Juan Pablo; Zandoná, Eugenia; Santidrián Tomillo, Pilar; Payo Payo, AnaWhen a group of concerned scientists initiated the Open Access (OA) movement in 2001 with the Budapest Open Access Initiative (https://www.budap estopenaccessinitiative.org), their primary objective was to facilitate free and universal access to scientific articles through the elimination of readers’ subscription fees. For authors, the increased visibility and impact associated with OA papers came at the expense of high publication costs. Twenty years later, the number of OA science journals has skyrocketed (Piwowar et al. 2018), including those focused on ecological research. Now, many traditional ecology journals (those that have not become fully OA) offer OA options as hybrid journals, and funding agencies help cover the publication fees associated with OA (referred to as article publication or processing charges), which may add up to several thousand dollars per paper.Publication Impactos económicos y ambientales de las estrategias de alimentación en lecherı́as de Costa Rica(2016) Alarcón Guerra, Leonardo Gabriel; Wattiaux, Michel A.; Casasola Coto, Francisco; Iñamagua Uyaguari, Juan Pablo; Jenet, AndreasThe aim of this study was to analyze feeding practices in Costa Rica’s dairy farms and their influence on greenhouse gas emissions (GHG). Methane (CH4), nitrous oxide (N2O), and income over feed cost (IOFC) were evaluated. This study was carried out at 104 dairy farms, which were distributed within a range of altitude from 1000 to 2400 meters above sea level. Using cluster analysis based on type of feed, grazing period, areas of forage and pastures; four feeding strategies were identified, which included different proportions of feed categories in daily rations. Emissions expressed as carbon dioxide equivalent per kilo of fat and protein corrected milk (CO2eq/FPCM) were higher for forage feeding strategies and lower for farms found in higher altitudes. Concentrate feed accounted for the higher cost in all feeding strategies, and represented more than 50% in the intensive concentrate based production system, whereas the costs of fertilizers were higher in pasture based feeding strategies. Income from milk sales was higher for the concentrate based feeding strategy. However, IOFC was the same for all feeding strategies in spite of the large differences in daily milk production. Feeding strategies influenced GHG emissions and feeding costs. Feeding strategies associated with lower GHG emissions within the farm were more dependent from external inputs.