Examinando por Materia "Abiotic"

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    Ítem
    La geodiversidad como herramienta para la planificación territorial y el desarrollo sostenible en la cuenca del rio Risaralda, Colombia
    (Universidad EAFIT, 2023) Rios Peters, Alejandra; Marín Cerón, María Isabel; Peters Guarín, Graciela
    Progress in the knowledge and estimation of geodiversity implies developing spatial and cartographic tools that can support, visually and quantitatively, the analysis of the complexity of the abiotic environment. The generation of methodological approaches and variations that allow an integral characterization of this field allows the development of more reliable models with a broad theoretical-practical basis that can be used for territorial planning, sustainable development of society and protection of natural resources. This work equally evidences the necessity of having reliable cartographic inputs, congruent with the reality of the study areas, to geoprocess the information in order to obtain a better classification and reliable representations of the variety of the abiotic environment in a given space. Therefore, this research process seeks to understand the wide diversity that occurs in the Risaralda River basin, from the geoscientific understanding and through the quantification of geodiversity, allowing to provide spatial and cartographic elements for the analysis and discussion of a widely neglected component in territorial planning. Enabling having information and data that could be the basis for prioritizing, directing efforts and resources for the protection and management of diverse landscapes and, unique as the one of the study area of this project.
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    Ítem
    Planktic foraminiferal diversity: Logistic growth overprinted by a varying environment
    (Universidad Nacional de Colombia, 2016-09-01) Cárdenas-Rozo, A.L.; Harries, P.J.; Universidad EAFIT. Departamento de Ciencias; Biodiversidad, Evolución y Conservación
    This study statistically assesses the relationship between the planktic foraminiferal long-term diversity pattern (~170 Ma to Recent) and four major paleobiological diversification models: (i) the ‘Red Queen’ (Van Valen, 1973; Raup et al., 1973), (ii) the turnover-pulse (Vrba, 1985; Brett and Baird, 1995), (iii) the diversity-equilibrium (Sepkoski, 1978; Rosenzweig, 1995), and (iv) the ‘complicated logistic growth’ (Alroy, 2010a). Our results suggest that the long-term standing diversity pattern and the interplay between origination and extinction rates displayed by this group do not correspond to the first three models, but can be more readily explained by the fourth scenario. Consequently, these patterns are likely controlled by a combination of planktic foraminiferal interspecific competition as well as various environmental changes such as marine global temperatures that could impacted the niches within the upper mixed layer within the oceans. Moreover, as other global long-term patterns have been interpreted as reflecting ‘complicated logistic growth’, this study further suggests that the interplay between abiotic and biotic factors are fundamental elements influencing the evolutionary processes over the extensive history of the biota. © 2016 Author(s).