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This degree thesis is centred on an analysis of learning situations in primary education, to prove that the model of task based learning is being implemented. The choice of this topic was made, in part, to widen our knowledge of learning situations and both the different forms of working them and applying them in practice, as it is something with which we will have to face in our daily teaching as future primary school teachers. After studying various learning situations we have chosen three from each of the two Canary Island capitals, Tenerife and Gran Canaria. They have been taken from various municipalities, without delineating a specific geographical area. Also, the analysis of the results reflect that all the learning situations researched follow the model of task based learning. En el presente trabajo de fin de grado nos centramos en el análisis de situaciones de aprendizaje de Educación Primaria, para comprobar si trabajan el modelo de enseñanza por tareas. La elección de este tema está motivada, en parte, por ampliar nuestro conocimiento sobre las situaciones de aprendizaje y las distintas formas de trabajarlas y ponerlas en práctica, ya que es algo con lo que tendremos que trabajar y llevar a cabo nosotras en nuestro día a día como futuras docentes. Tras estudiar varias situaciones de aprendizaje, hemos escogido tres de cada isla capitalina, Tenerife y Gran Canaria, repartidas a lo largo de los municipios de las mismas, sin centrarnos en una zona geográfica concreta. Asimismo, se pone de manifiesto que el análisis de los resultados refleja que todas las situaciones que hemos analizado se rigen por el modelo de enseñanza por tareas.

Trabajo presentado en el II International Conference on Island Evolution, Ecology and Conservation, celebrado en Angra do Heroísmo, Islas Azores (Portugal) del 18 al 22 de julio de 2016., The European rabbit, Oryctolagus cuniculus, is an invasive mammal in the Canary Islands and a keystone species in alteration of island ecosystems worldwide. It may dramatically affect the vegetation through different mechanisms, and therefore contribute to modifying habitat and communities, producing benefits in some species and damaging others. Thus, the rabbit might be considered as an ‘ecosystem engineer’. Through a study on the population structure of the endemics shrubs Spartocytisus supranubius and Pterocephalus lasiospermus, we explored the role of rabbits as a keystone in driving changes on dominant species of the summit vegetation of El Teide National Park (Tenerife, Canary Islands). We also analysed the spatial heterogeneity of these two dominant species, their relation with the herbivores, the plant age-classes and the growth response to variation in soil nutrient availability. For these purposes 90 plots were established at 30 localities within the high mountain area. Furthermore, we used 13 permanent plots in two types of herbivore exclusions (‘only big-herbivores’ and ‘all herbivores’). In one of the localities, 100 soil samples were collected to analyse the relationship between changes in nutrients (N, NO3, K) produced by rabbits and plant growth. The population of S. supranubius is clearly declining due to the negative effect of rabbits in its regeneration, matching with a rapid increase in the population of P. lasiospermus. This study also showed that the density of rabbits is the most influential variable affecting the population structure of S. supranubius. Furthermore, the increase in nitrates and potassium favour the growth of P. lasiospermus. The high contrast in palatability between both species and the different response to the increase in nitrates and potassium, represent the main forces in explaining the current dynamic of the vegetation in the high mountain of Tenerife. Our results highlight the urgency to control the great density of rabbits in this area.

Trabajo presentado en Floramac celebrado en Las Palmas de Gran Canaria (España) del 24 al 27 de marzo de 2015., The European rabbit, Oryctolagus cunniculus, may dramatically affect the vegetation through different mechanisms, and therefore may contribute to modify habitat and communities, producing benefits in some species and harming others. Thus, rabbit might be considered as a landscape engineer. The European rabbit is an invasive mammal in the Canary Islands, and a keystone species in the change of the ecosystems. Some studies have shown the effects of this herbivore on some threatened species, but they do not have analysed its wide scale effects on dominant species of the Canary ecosystems. Here, we have explored the role of rabbits as ecosystem engineers in the summit vegetation of the Canary Islands, through a study on the population structure of Spartocytisus supranubius and Pterocephalus lassiospermus. We have studied the spatial heterogeneity of these two dominant species and the relationship between rabbit density and age-classes. For this purpose 90 analysis plots were established along 30 localities, within the distributional area of S. supranubius. Furthermore, we used 12 permanent plots of herbivore exclusion controlled by Teide National Park. In all of them the structure and composition of vegetation, as well as the most important abiotic variables, were analyzed. This study showed that density of rabbits is the most influential variable on the population structure of S. supranubius. It also confirmed that the population of the broom scrub is declining due to the negative effect of rabbits in its regeneration and showed that the decline of S. supranubius was positively correlated with the increase of P. lasiospermus.