Browsing by Author "Coronel-Bustamante, David"

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Effect of arbuscular mycorrhiza on germination and initial growth of Cinchona officinalis L. (Rubiaceae).
(Taylor and Francis, 2022-09) Fernandez-Zarate, Franklin Hitler; Huaccha-Castillo, Annick Estefany; Quiñones Huatangari, Lenin; Vaca-Marquina, Segundo Primitivo; Sánchez-Santillan, Tito; Morales-Rojas, Eli; Seminario-Cunya, Alejandro; Guelac-Santillan, Marly; Barturén Vega, Luci Magali; Coronel-Bustamante, David
Cinchona officinalis, known locally as cascarilla or cinchona, is a plant species native to South America. It was used as a source of quinine to combat malaria in the 17th century. The species is threatened by various anthropogenic activities. Further, the propagation of the species depends on seed dispersal and its germination capacity. Therefore, it is necessary to conserve and propagate this species. Because C. officinalis seeds have a low germination capacity, we determined the effect of arbuscular mycorrhizae (AM) on their germination and growth. A randomized design was employed with two treatments, one treated with mycorrhizae (CM) and another without mycorrhizae (SM). For each treatment, three replicates of 100 seeds were used. Germination, growth, and fungal characteristics were evaluated. In germination parameters, the CM treatment showed better performance, but the improvement was statistically insignificant. However, the application of AM significantly improved seedling height (cm), root length (cm), leaf area (cm2), and root number by 53.52, 28.72, 29.73, and 61.66%, respectively. Likewise, mycorrhization intensity (%), mycorrhization frequency (%), and extraradical mycelium length (cm) in the CM treatment were 37.13, 3.44, and 174.97% higher compared to the SM treatment, respectively. Therefore, the use of AM fungi proves to be advantageous in the propagation of C. officinalis, and these results provide a basis for the largescale and sustainable propagation of this species.
Land Use and Land Cover Change from 1998–2024 in the Shumba Watershed, Peru: A Remote Sensing-Based Assessment.
(International Information and Engineering Technology Association, 2025-06) Quispe, Mariela J.; Callirgos, Noemi; Sánchez, Segundo; Sandoval, Henry; Coronel-Bustamante, David; Pérez-Delgado, Luis Jhoseph; Oliva, Yashira; Taboada-Mitma, Victor; Cruz-Luis, Juan Carlos Alejandro; Seminario-Cunya, Alejandro; Huaccha-Castillo, Annick E.; Atalaya-Marin, Nilton; Gomez-Fernandez, Darwin; . Fernandez-Zarate, Franklin H.
The Shumba watershed, located in the province of Jaén, played an essential role in the ecological balance and water supply of the region. The objective of this study was to analyze changes in land cover and land use between 1998 and 2024, using spectral indices of vegetation, soil, and water derived from Landsat 5 and 8 images. The processing was performed in Google Earth Engine and ArcGIS 10.5, applying the Random Forest algorithm for supervised classification. The results indicate an increase of 2708.11 ha in the category “Mosaic of crops, pastures and natural spaces” and 122.50 ha in “Continuous urban fabric”. In contrast, reductions were recorded in “Shrub/herbaceous vegetation” (- 1867.32 ha), “High dense forest” (-462.86 ha), “Transient crops” (-446.25 ha), and “Bare land” (-54.17 ha). Validation of the classification yielded an overall accuracy of 0.90 and a Kappa coefficient of 0.88, which supports the reliability of the results. These changes show significant transformations in the landscape, providing key information for territorial planning and the implementation of environmental conservation policies.
Where Are We with Respect to Research in Support of Sustainable Development Goal 13? Bibliometric Analysis.
(International Information and Engineering Technology Association, 2024-12) Fernandez-Zarate, Franklin Hitler; Pérez-Delgado, Luis Jhoseph; Coronel-Bustamante, David; Huanca-Silva, Leisy; Taboada-Mitma, Victor H.; Quispe-Carhuapoma, Mariela; Oliva-Alvarez, Yashira; Huaccha-Castillo, Annick Estefany; Seminario-Cunya, Alejandro; Quiñones Huatangari, Lenin; Ocaña-Zuñiga. Candy Lisbeth; Morales-Rojas, Eli; Vaca-Marquina, Segundo; Miguel-Miguel, Hugo; Cruz-Luis, Juancarlos
Climate change is one of the main global challenges, addressed in the United Nations Sustainable Development Goal (SDG) 13, which seeks to “take urgent action to combat climate change and its impacts”. The objective of the research was to analyze scientific articles that directly relate to SDG 13 through a bibliometric analysis for the period 2015 to 2024 of the Scopus database using the search term “SDG 13” OR “Sustainable Development Goal 13”. The research identified prolific authors, articles, sources with the highest impact in the area of study, leading institutions and countries in publications along with a detailed keyword analysis. The results show that interest in the study of SDG 13 has grown significantly with a focus on areas such as mitigation and adaptation, low carbon economy and public policy. This analysis provides an overview of advances in SDG 13 research, helps to identify knowledge gaps and emerging areas, and contributes to the formulation of effective policies and the drive for global climate action.