Search results for "Edafologia"

Áreas y suelos: El tamaño de los yacimientos de superficie. Una propuesta metodológica

2011

En los estudios sobre el patrón de asentamiento y en los análisis del territorio, la variable"tamaño" del asentamiento juega un papel importante. Considerada como"proxy" de la población, no siempre resulta fácil de calcular en ausencia de estructuras arqueológicas construidas: aterrazamientos o fortificaciones. En este trabajo se presenta una aproximación al cálculo de dicha variable en los asentamientos de superficie caracterizados simplemente por la dispersión de materiales, que toma como punto de partida la correlación entre aquélla y la presencia de los horizontes edáficos ah. La reciprocidad positiva de ambos factores permite sugerir diversas hipótesis sobre la relación entre la formac…

Assessing Effects of Temperature Change on Four Limonium Species from Threatened Mediterranean Salt-Affected Habitats

2018

[EN] Evaluation of tolerance to temperatures in the germination stage is an important tool to foresee the possible effect of global warming. Moreover, establishing germination protocols for endemic and threatened species is most interesting for restoration and management plans that focus on habitat conservation. Seed germination was analysed in four species of the genus Limonium (L. virgatum, L. narbonense, L. girardianum and L. santapolense) growing in two saline habitats on the eastern coast of the Iberian Peninsula. The study aim was to compare responses of seed germination to different temperature regimes. Seeds were collected in two protected areas, `L¿Albufera de Valencia¿ (province o…

Impacts of thinning of a Mediterranean oak forest on soil properties influencing water infiltration

2017

[EN] In Mediterranean ecosystems, special attention needs to be paid to forest¿water relationships due to water scarcity. In this context, Adaptive Forest Management (AFM) has the objective to establish how forest resources have to be managed with regards to the efficient use of water, which needs maintaining healthy soil properties even after disturbance. The main objective of this investigation was to understand the effect of one of the AFM methods, namely forest thinning, on soil hydraulic properties. At this aim, soil hydraulic characterization was performed on two contiguous Mediterranean oak forest plots, one of them thinned to reduce the forest density from 861 to 414 tree per ha. Th…

Forced Flowering in Mandarin Trees Under Phytotron Conditions

2019

[EN] Phytotron has been widely used to assess the effect of numerous parameters on the development of many species. However, less information is available on how to achieve fast profuse flowering in young fruit trees with this plant growth chamber. This study aimed to outline the design and performance of a fast clear methodology to force flowering in young mandarin trees (cv. Nova and cv. Clemenules) and to analyze the influence of induction intensity on inflorescence type. The combination of a short water stress period with simulated spring conditions (day 13 h, 22 °C, night 11 h, 12 °C) in the phytotron allowed flowers to be obtained only after 68-72 days from the time the experiment beg…

Microwave and optical data fusion for global mapping of soil moisture at high resolution

2018

After more than 8 years in orbit the Soil Moisture and Ocean Salinity (SMOS) satellite is still in good health and several algorithms for improving its spatial resolution have been proposed and validated in a variety of catchments. However, none of them has yet been applied at the global scale. In this article we present: i) a review of the latest SMOS-BEC downscaling algorithm, which allows for its global application using an adaptive moving window and ii) a thorough validation of the resulting maps over two in-situ networks: REMEDHUS in Spain and OzNet in Australia. The proposed algorithm combines SMOS brightness temperatures (at ~40 km spatial resolution), and MODIS-derived Land Surface …

Comparing Beerkan infiltration tests with rainfall simulation experiments for hydraulic characterization of a sandy-loam soil

2017

[EN] Saturated soil hydraulic conductivity, K-s, data collected by ponding infiltrometer methods and usual experimental procedures could be unusable for interpreting field hydrological processes and particularly rainfall infiltration. The K-s values determined by an infiltrometer experiment carried out by applying water at a relatively large distance from the soil surface could however be more appropriate to explain surface runoff generation phenomena during intense rainfall events. In this study, a link between rainfall simulation and ponding infiltrometer experiments was established for a sandy-loam soil. The height of water pouring for the infiltrometer run was chosen, establishing a sim…

Using LEACHM model for evaluation and optimization of the use low quality water in citrus

2018

Para evaluar el riesgo de salinizacion en suelos con cultivo de cítricos se utilizó el modelo LEACHM que fue calibrado y validado en 7 perfiles de la cuenca sedimentaria de Torreblanca (Castellón, España). Se aplicó un análisis de escenarios mediante la combinación de: cultivos, clima, suelos, tipo de riego y calidad de las aguas y se analizaron estrategias alternativas mediante la utilización de mezclas de aguas. Los índices estadísticos mostraron un buen ajuste del modelo en la zona radicular entre 200-600 mm y una sobreestimación de la humedad en los horizontes inferiores. En cuanto al riesgo de salinización los resultados confirmaron el uso inapropiado de las aguas con CE>3 dS/m. Se …

Corema album archaeobotanical remains in western Mediterranean basin. Assessing fruit consumption during Upper Palaeolithic in Cova de les Cendres (A…

2019

[EN] Information about plant gathering by Palaeolithic hunter-gatherers in Europe is scarce because of the problems of preservation of plant remains in archaeological sites and due to the lack of application of archaebotanical analysis in many of them. Botanical macroremains wood charcoal, seeds, fruits, leaves, etc. - provide information not only about palaeoeconomy of hunter-gatherers, but also about climate, landscape and vegetation dynamics. In Gravettian and Solutrean levels of Cova de les Cendres (Alicante, Spain), Corema album pyrenes (Empetraceae or crowberries family) have been identified. On the contrary, wood charcoal of this species has not been documented among the remains of f…

Plano euforimétrico del término municipal de Madrid

Orientat amb línies assenyalant el nord. - Llegenda amb els tipus de sòl. - Representat el plànol urbà de Madrid