Search results for " biodiversidad"
showing 9 items of 9 documents
The interplay of landscape composition and configuration: new pathways to manage functional biodiversity and agroecosystem services across Europe
2019
Managing agricultural landscapes to support biodiversity and ecosystem services is a key aim of a sustainable agriculture. However, how the spatial arrangement of crop fields and other habitats in landscapes impacts arthropods and their functions is poorly known. Synthesising data from 49 studies (1515 landscapes) across Europe, we examined effects of landscape composition (% habitats) and configuration (edge density) on arthropods in fields and their margins, pest control, pollination and yields. Configuration effects interacted with the proportions of crop and non-crop habitats, and species’ dietary, dispersal and overwintering traits led to contrasting responses to landscape variables. O…
Study of a New Population of the Argentinian Endemic Species Riella choconensis Hässel (Riellaceae, Marchantiophyta) Reveals a Novel Anatomical Struc…
2019
A new population of the Argentinian endemic Riella choconensis Hässel (Riellaceae, Marchantiophyta) was discovered from a culture of sediments from the Laguna de los Juncos (Río Negro province, Argentina). This species was known previously from two nearby collections, made in 1984, in the type locality at the Ramos Mexía reservoir (Neuquén province) and was not recorded since. Fresh material from the new population enabled detailed morphological analyses, which are extensively described here, illustrated and compared to type material of the species. Based on the smooth female involucre, the species belongs to subgenus Riella Mont. However, cross-sections of this structure showed that R. cho…
Three ways to deliver a net positive impact with biodiversity offsets
2020
Biodiversity offsetting is the practice of using conservation actions, such as habitat restoration, management, or protection, to compensate for ecological losses caused by development activity, including construction projects. The typical goal of offsetting is no net loss (NNL), which means that all ecological losses are compensated for by commensurate offset gains. We focused on a conceptual and methodological exploration of net positive impact (NPI), an ambitious goal that implies commitment beyond NNL and that has recently received increasing attention from big business and environmental nongovernmental organizations. We identified 3 main ways NPI could be delivered: use of an additiona…
Malaria en España: aspectos entomológicos y perspectivas de futuro
2008
Rubén Bueno Marí (ruben.bueno@uv.es) y Ricardo Jiménez Peydró (Ricardo.Jimenez@uv.es) La malaria fue erradicada de España oficialmente en 1964. Sin embargo, en la actualidad en nuestro país se registran anualmente cientos de casos importados. En este sentido, el estudio del vector se postula de gran importancia para inferir posibles escenarios de transmisión, ya sea de tipo esporádico o regular. Si bien el nivel socio-económico del país no parece secundar una posible reemergencia de la enfermedad a corto o medio plazo, la presencia de poblaciones de anofelinos bien establecidas y gametocitos de plasmodios circulando entre cierto porcentaje de la población humana parecen avalar, con suficien…
Listado actualizado y comentado de las babosas terrestres (Mollusca: Gastropoda: Stylommatophora) de la península ibérica y las islas Baleares
2022
En este artículo recopilamos y comentamos la lista de las especies de babosas terrestres (“Pulmonados desnudos”) de la península ibérica (algunas también presentes en el sur de Francia) e islas Baleares, basándonos en una revisión bibliográfica hasta el nivel de especie y en nuestras propias recolecciones. Está formada por 71 especies, de las cuales 34 son endémicas, y de ellas sólo dos de Baleares, pertenecientes a 9 familias y 16 géneros. Realizamos 30 comentarios sobre diversas características morfo-anatómicas de algunos taxones del listado y se discuten algunos aspectos nomenclaturales…
Adiciones y revisiones al Atlas de la flora vascular silvestre de Burgos, XI
2017
[ES] Se mencionan 38 táxones con citas y/o comentarios referidos a su existencia en la provincia de Burgos. De ellos, siete suponen una novedad para el catálogo provincial.
Heterotheca subaxilaris (Compositae), nuevo xenófito para la flora ibérica
2017
Heterotheca subaxillaris (Compositae), a new xenophyte for the iberian flora. A first reference on the presence of Heterotheca subaxillaris (Lam.) Britton & Rusby (Compositae), native of North America, in the iberian flora is provided. This species has been located at the CV-10 highway, in la Pobla Tornesa, Castellón province (Spain).
Tras la pista del VIH: los estudios evolutivos y la comprensión del sida.
2013
El VIH o virus de la inmunodeficiencia humana tiene un gran impacto sanitario, social y económico; las terapias actuales permiten controlar la infección pero no se ha encontrado tratamiento curativo ni vacuna efectiva. Para conseguir estos objetivos, debe tenerse en cuenta la gran variabilidad genética y rápida evolución del VIH, asociadas, por ejemplo, a la aparición de variantes de resistencia a fármacos o de cambios antigénicos.
Aportaciones al conocimiento de los mosquitos (Diptera, Culicidae) de alta montaña presentes en la Península Ibérica
2009
Several larval samplings of mosquitoes (Diptera, Culicidae) in different mountainous regions of the peninsular Spain were carried out. A total of 2796 specimens belonging to 18 species were collected, nevertheless the 72.5 % of these finds includes only three of them (Cx. hortensis hortensis, Cx. pipiens and Cs. longiareolata). The adaptation capacity to a varied typology of water bodies together with the marked multivoltinism that characterizes their biotic cycles are postulated as two of the principal reasons that explain their abundances. The altitudinal distribution as well as some information about the bioecology of all the species captured are also exposed.