Buenos aires en tinta china

Poesí

Dos retornos

Poema: Retornos de una sombra de verano - Retornos de una sombra maldit

In Alta Gracia with Mr. Manuel de Falla. A submerged cantata

Publicado en «La Nación» (Buenos Aires, Argentina), domingo 16 de septiembre de 1945

La Gallarda

La Gallarda (Tragedia de vaqueros y toros bravos en un prólogo y tres actos) 1944-1945, es la más destacada aportación de Alberti al teatro del exilio. La obra escrita totalmente en verso y caracterizada por la variedad de ritmos y la ágil combinación de las formas métricas utilizadas se considera inserta “en una clara línea neotradicional” que remite al teatro del Siglo de Oro.355 págs

The Rapid Effects of Yellow-Legged Gull (Larus michahellis) Colony on Dune Habitats and Plant Landscape in the Atlantic Islands National Park (NW Spain)

[Abstract] The Atlantic Islands of Galicia Maritime/Terrestrial National Park hosts one of the largest breeding colonies of yellow-legged gull (Larus michahellis) in the world. In 2002, a new yellow-legged gull breeding colony was established on the Punta Muxieiro dune complex, which also harbors rare and threatened plant species and habitat types of community interest according to Directive 92/43/EEC. This study assesses the effect of this colony on two habitats of community interest: white dunes and grey dunes. For this purpose, plant cover and soil properties, composition, and nutrient content were monitored in plots with different gull densities. Moreover, historic aerial images were compiled to observe changes in the plant landscape of the dune system. The results showed that, despite the recentness of the occupation of the dune system by yellow-legged gull species, significant changes in acidic–alkaline processes and nutrient availability were already observed in soils. Soils in plots with higher gull density showed more acidic pH values and a higher content of the most labile N and P fractions. Moreover, a decrease in plant cover and number of species was also demonstrated in plots with higher gull densities. Finally, the presence of ruderal and alien species such as Urtica membranacea and Parietaria judaica was also observed.This study has been funded by the BBVA Foundation and CRETUS. Thanks are due to the Spanish Ministry of Education and Science for the FPU grant to S. De la Peña-Lastr

Spatial synchrony of wader populations in inland lakes of the Iberian Peninsula

Spatial synchronization refers to similarity in temporal variations between spatially separated populations. Three mechanisms have been associated with the spatial synchrony of populations: Moran effect, dispersal and trophic interactions. In this study, we explored the degree of spatial synchrony of three wader species populations (Pied Avocet, Black-winged Stilt and Kentish Plover) using monthly estimates of their abundance in inland lakes of the Iberian Peninsula. The effect of several types of wetland variables (structural, hydroperiod and landscape) on spatial synchronization was explored. Groups of lakes with significant synchronization were identified for all three species. The lakes with wastewater input presented longer hydroperiods than those that did not receive these effluents, and this factor was positively related to the spatial synchrony of the Pied Avocet and Kentish Plover populations. The distance between lakes (used as an indicator of the dispersal effect on synchronization) was significant only in Pied Avocet. No structural or landscape variables were related to spatial synchronization in any species. It was impossible to identify any variable related to the spatial synchronization of Black-winged Stilt abundance as a possible result of the high ecological plasticity of this species. Our data provides the first evidence for mechanisms that act on the spatial synchronizing of wader populations in temporary continental lakes in central Spain, and show that the hydroperiod of lakes acts as an important factor in the spatial synchronization of aquatic species and that its effect is mediated by the reception of urban wastewater.This study forms part of the doctoral thesis of M. S. S. G. and was supported by a grant from CAPES—Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Brazil. The present work was performed within the Project ECOLAKE “Ecological patterns in endorheic lakes: the keys to their conservation, CGL2012-38909” (Universidad de Valencia), funded by the Spanish Ministry of Economy and Competitiveness, and by the European Union through the European Fund for Regional Development (FEDER) “One way to make Europe”