Person: Jiménez Escobar, María Dolores
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First Name
María Dolores
Last Name
Jiménez Escobar
Affiliation
Universidad Complutense de Madrid
Faculty / Institute
Ciencias Biológicas
Department
Biodiversidad, Ecología y Evolución
Area
Ecología
Identifiers
10 results
Search Results
Now showing 1 - 10 of 10
Item Guía Rápida de SPSS v.25 (Prácticas de Ecología)(2019) López-Pintor Alcón, Antonio; Barandica Fernández, Jesús; Acosta Gallo, Belén; Casado González, Miguel Ángel; Delgado Sáez, Juan Antonio; García Avilés, Javier; de las Heras Puñal, Paloma; Herrero de Jáuregui, Cristina; Jiménez Escobar, María Dolores; López de Pablo, Carlos Tomás; Martín de Agar Valverde, Pilar; Martín Zorrilla, Juan Vicente; Morcillo Alonso, Felipe; Ortega Quero, Marta; Rovira Sanroque, José Vicente; Serrano Talavera, José ManuelGuía rápida de SPSS v.25 para usar en las Prácticas de Ecología (Grado en Biología, 3er curso)- Project number: 235
Item Programa piloto de uso del portafolio como herramienta docente en el Grado de Biología(2020) Delgado Sáez, Juan Antonio; Jiménez Escobar, María Dolores; Pias Couso, María Beatriz; Herrero De Jáuregui, Cristina; Pérez Tris, Javier; Sánchez Jiménez, Abel; González Martín, Antonio; Saura Álvarez, María; Rodríguez Sousa, Antonio Alberto; Pardos Martínez, Fernando; Sánchez De Dios, Rut; Gutiérrez López, Mónica; Schmitz García, María Fe; Ramírez García, Álvaro; Vergara Carretero, Susana; Pulido Delgado, Francisco; Santos Martínez, Tomas; Acosta Gallo, Belén; Panetsos Petrova, Fivos; Arriero Higueras, Elena; Almodovar Pérez, Ana María; López De Pablo, Carlos Tomas; Alonso Campos, Germán; Miguel Garcinuño, José Manuel De; Gabriel Y Galán Moris, José María; Hernández Pazmiño, NathaliaMemoria final del proyecto de Innovación educativa "Programa piloto de uso del portafolio como herramienta docente en el Grado de Biología" - Project number: 125
Item Seguimiento de los efectos del cambio climático en el Campus(2023) Delgado Sáez, Juan Antonio; Jiménez Escobar, María Dolores; Pérez Corona, María Esther; Marín Blnaco, Juan Carlos; Fernández Sousa, David; García Osuna, David; García Bravo, Cristian; García Matesanz, Sara; Giménez Soutullo Ferrán; Mediavilla Bailo, Claudia; Ruiz Repiso, Ángela; Serrano Arranz, Sofía; Sorrez González, RafaelSe presenta la memoria del Proyecto de Innovación docente titulado Seguimiento de los efectos del cambio climático en el Campus. En este proyecto se desarrollan tres objetivos: 1) Capacitar al estudiante a la obtención de datos con validez científica, comprometiéndose con la toma cuidadosa y estandarizada de mediciones que permitan un análisis fiable y repetible, mientras realizan trabajo en equipo; 2) Reforzar el posicionamiento de la Ecología como ciencia que se basa en datos para la elaboración de hipótesis y el rechazo o apoyo a las predicciones que se deriven de estas hipótesis. Se trata de evitar que dogmaticen la teoría y vean los conceptos de la asignatura ligados a la realidad observable; y 3) Enseñar diversas técnicas de medición que no son aplicables para los grupos grandes que manejamos en las prácticas. Item Erratum to: Field patterns of temporal variations in the light environment within the crowns of a Mediterranean evergreen tree (Olea europaea)(Trees, 2016) Ventre-Lespiaucq, Agustina B.; Escribano Rocafort, Adrián Gaspar; Delgado Sáez, Juan Antonio; Jiménez Escobar, María Dolores; Rubio de Casas, Rafael; Granado Yela, Carlos; Balaguer Núñez, LuisItem Spatial and demographic structure of tara stands (Caesalpinia spinosa) in Peru: Influence of present and past forest management(Forest Ecology and Management, 2016) Cordero, I.; Jiménez Escobar, María Dolores; Delgado Sáez, Juan Antonio; Villegas, L.; Balaguer Núñez, LuisTropical dry forests are highly endangered ecosystems that have been scarcely studied. Many species within these forests suffer regeneration problems due to unsustainable management regimes. In particular, a regeneration problem has been detected in a forest of tara (Caesalpinia spinosa), a neotropical tree of high ecological and economic value, in Atiquipa (Peru). The study of the spatial patterns and population structure of forests can help us understand their dynamics and evaluate the effects of management. In this article, we analyse the stand demographic structure, spatial distribution and patterns of plant interactions in tara forests. We evaluate whether the regeneration problem in Atiquipa is strictly local or a problem of general concern and investigate the most probable causes. Four tara stands were selected at different localities in Peru. Two stands (Andurco and Polán) had a reverse J-shaped diametric structure, typical of stable self-replacing forests, although Polán had a low number of young trees, indicating an incipient regeneration problem. The Lloque histogram was skewed (with a maximum in seedlings 61 cm), indicating over-exploitation in the past and present forest regeneration. Maguey had a low number of regenerates, with peaks in some intermediate diametric classes, which may indicate natural regeneration problems or some past management. Spatial distribution of tara trees did not depart from the null model (�random distribution), typical of trees dispersed by zoochory. Maguey was an exception, showing a regular pattern at short distances, possibly associated with past management (like selective cuttings and/or plantations). These results suggest that in most of the analysed stands the current forest management (i.e. excessive seed collection or grazing) limits tara forest regeneration. However, the only stand with a protected status presented a clear tendency toward population increase. Bivariate analyses revealed an aggregated pattern between seedlings and adult trees. Moreover, the plant-plant interaction study showed that seedlings were associated with woody vegetation. These positive associations highlight a facilitative effect that ameliorates stressful microclimatic characteristics and/or protects tara seedlings from herbivory. The results of this study support some recommendations for sustainable management, such as controlled stocking rate, limited seed collection and promotion of bush cover.- Project number: 295
Item Laboratorio de cambio climático(2018) Jiménez Escobar, María Dolores; Delgado Sáez, Juan Antonio; Barandica Fernández, Jesús María; Serrano Talavera, José Manuel; Hernández Pazmiño, Nathalia; Betanska, Agata; Díaz Carro, Miguel; Soneira Martínez, FernandoEn el presente proyecto, se aborda e ilustra de un modo sencillo el estudio del cambio climático dentro de la asignatura de Ecología y asignaturas relacionadas. En este tema, los estudiantes deben superar la dificultad de entender que el cambio climático es un proceso a nivel planetario, con consecuencias detectables a nivel local. Para facilitar la compresión de éstos conceptos podemos simular de manera experimental un aumento de temperatura a nivel de parcela y estudiar cómo se pueden ver afectados algunos de los procesos esenciales que rigen la dinámica de las comunidades biológicas y el funcionamiento de los ecosistemas a pequeña escala. Con dicho propósito en el presente proyecto de innovación docente se proyectó la instalación de OTCs (Open Top Chamber) en el Real Jardín Botánico Alfonso XIII, para facilitar la monitorización por parte de los alumnos de variables ambientales sensibles al cambio climático y poder realizar pequeños experimentos que permitieran abordar trabajos de investigación, trabajos fin de grado e, incluso, trabajos fin de máster. Item Estudio de comunidades de matorral mediterráneo I(2019) López-Pintor Alcón, Antonio; Barandica Fernández, Jesús; Acosta Gallo, Belén; Casado González, Miguel Ángel; Delgado Sáez, Juan Antonio; García Avilés, Javier; de las Heras Puñal, Paloma; Herrero de Jáuregui, Cristina; Jiménez Escobar, María Dolores; López de Pablo, Carlos Tomás; Martín de Agar Valverde, Pilar; Martín Zorrilla, Juan Vicente; Morcillo Alonso, Felipe; Ortega Quero, Marta; Rovira Sanroque, José Vicente; Serrano Talavera, José ManuelConjunto de guiones de prácticas de Ecología, correspondientes al bloque temático sobre el estudio de comunidades, y material complementario (estadillo y plantilla para la matriz de datos).Item Sink strength manipulation in branches of a Mediterranean woody plant suggests sink-driven allocation of biomass in fruits but not of nutrients in seeds(Acta Physiologiae Plantarum, 2016) Catalán, Pablo; Delgado Sáez, Juan Antonio; Jiménez Escobar, María Dolores; Balaguer Núñez, LuisThe relative autonomy of branches within an individual plant may favor different resource allocation responses after reproductive losses. The assessment of these reproductive strategies at the branch level before their integration at the plant level would provide more insight into how plants deal with reproductive losses. Here, we present a field experiment to assess changes in the allocation strategies at the branch level after sink strength manipulation in a Mediterranean woody plant (Cistus ladanifer). We applied three levels of removal of developing fruits (75, 25 and 0 %) on branches of the same plants, and measured their effects on resource allocation (biomass, nitrogen and phosphorus) and seed production after controlling for the effects of branch diameter and leaf weight per branch. Our results suggest that after experimental fruit thinning, C. ladanifer branches presented a sink-driven allocation of biomass to fruits but this was not the case for the allocation of nutrients to seeds, which could be driven by competition with leaf biomass. Reductions in biomass per fruit resulted in a reduction in seed output since the average weight per seed remained constant. From these results, it could be suggested that an heterogeneous distribution of fruit losses among the branches within a crown would produce a higher impact on reproductive output than a more equitable distribution.Item Field patterns of temporal variations in the light environment within the crowns of a Mediterranean evergreen tree (Olea europaea)(Trees, 2016) Ventre-Lespiaucq, Agustina B.; Escribano Rocafort, Adrián Gaspar; Delgado Sáez, Juan Antonio; Jiménez Escobar, María Dolores; Rubio de Casas, Rafael; Granado Yela, Carlos; Balaguer Núñez, LuisThe light environment within a tree crown can be characterized by specific variation patterns arising from the structural features of the crown. Within-crown light variation patterns can be important for plant productivity, but this has yet to be assessed in natural settings. The spatio-temporal variations of direct and diffuse photosynthetic photon flux density (PPFD), their proportions and sunfleck frequency within the crowns of isolated adult wild olive trees (Olea europaea L.) were investigated. Trees growing in contrasting Mediterranean conditions (continental vs. coastal) at the same latitude were compared. Instantaneous diffuse and total PPFD were measured with sunshine sensors in three crown layers (outer-, middle- and inner-crown) in the south-facing part of the crown, at two points of the diurnal (mid-morning and midday) and seasonal (summer and winter) cycles. Direct PPFD and the proportion of direct to total PPFD vary diurnally within the crown as a result of an increase in sunfleck requency during midday and in self-shading during mid-morning, in both summer and winter conditions. Conversely, the lack of seasonal variation in the three light attributes is better explained by a greater average crown transmittance in winter conditions. The interplay between crown architecture heterogeneity and varying solar position renders identifiable patterns of temporal variations in the light environment within tree crowns. These patterns suggest that trees can benefit from the light heterogeneity typical of Mediterranean environments by developing conservative architectural layouts.- Project number: 341
Item Haciendo visibles procesos e interacciones ecológicas a través de la experimentación(2016) Delgado Sáez, Juan Antonio; Jiménez Escobar, María Dolores; Serrano Talavera, José Manuel; Barandica Fernández, Jesús MaríaEl presente proyecto aborda la facilitación del aprendizaje de conceptos abstractos en ecología mediante experimentación.Para ello proponemos la realización de modelos de experimentación que permitan abordar conceptos abstractos en ecología a través de la selección de procedimientos experimentales necesarios para obtener las mediciones (el cómo se hace). Sobre estos procedimientos se realizará un modelo lo más real posible con todos los elementos básicos, de manera que los estudiantes puedan ver la configuración material del mismo y, sobre éste esquema discutir las limitaciones empíricas y su aportación a la generalización abstracta del proceso medido. El resultado son tres productos prácticos que incluyen el desarrollo teórico, un guión de prácticas, hojas de cálculo (Excel) para la realización de los cálculos y una presentación que permite conocer detalles teóricos y del desarrollo material de la práctica.