280 resultados para corridors


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Acoustic measurements were performed in eight schools of different levels of education (from kindergarten to college) located in Viseu – Portugal. The acoustic evaluation was made in order to analyze the most common problems that may condition the acoustic environment inside school building. The acoustics evaluation of school buildings was made by the measurement of: reverberation time in classrooms; sound insulation between classrooms and between classrooms and corridors; impact sound insulation of floors and airborne sound insulation of façade. The sound insulation of façade was made with all elements closed and with natural ventilation conditions (banners or windows tilt mode). It was found that most of the studied cases revealed disabled constructive aspects in relation to the acoustic requirements of school buildings compromising the quality of education.

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As global populations grow, cities are stretching their urban boundaries into rural areas and bringing the challenges of biodiversity conservation into the backyards of homeowners. Planning controls can attempt to regulate residents’ behaviours to support conservation actions for threatened species but need to consider whether community attitudes align with conservation objectives. This study investigated community attitudes towards planned management interventions in a new conservation strategy designed to protect endangered Southern Brown Bandicoots in new residential estates around Cranbourne, Australia. A survey (n = 318, response rate 15.2 per cent) investigated current resident attitudes towards bandicoot conservation, cat ownership and effectiveness of current planning controls. Results indicate community support for a range of bandicoot conservation actions including confinement of domestic cats and non-lethal cat controls and for new developments being cat-free with bandicoot habitat corridors. Awareness of bandicoots correlated with higher support for conservation actions while cat owners were less supportive overall, particularly to limitations on cat ownership. Potential barriers to management interventions include inadequate knowledge, perceived associated risks and housing turnover. This information is valuable for conservation planning for new developments and to improve implementation of planning controls in existing residential areas for delivery of long-term protection for threatened species like Southern Brown Bandicoots.

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Loss and fragmentation of habitat can disrupt genetic exchange between populations, which is reflected in changes to the genetic structure of populations. The Grey-crowned Babbler (Pomatostomus temporalis) is a cooperatively breeding woodland bird, once common and widespread in south-eastern Australia. The species has suffered population declines of >90% across its southern distribution as a result of loss and fragmentation of habitat. We investigated patterns of genetic diversity and population structure of Grey-crowned Babblers in fragmented habitats at the southernmost extent of its range. We sampled blood from 135 individual Babblers from 39 groups stratified into six subpopulations in three regions. Genotypic data were used to estimate genetic diversity, population substructure, local relatedness and dispersal patterns. Individuals showed high heterozygosity within regions, and varying numbers of private alleles among regions suggested differences in levels of connectivity between regions. Four genetic clusters revealed population substructure consistent with treeless landscapes acting as strong barriers to gene flow. In contrast to previous studies,we identified a male-biased dispersal pattern and significant isolation-by-distance patterns for females at fine spatial scales. We recommend that conservation plans for this species incorporate opportunities to increase and enhance corridor areas to facilitate genetic exchange among subpopulations.

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The effect of isolation and the importance of dispersal in establishing and maintaining populations in fragments of remnant habitat remain poorly understood. Nevertheless, environmental connectivity is likely to be important for ensuring the long-term preservation of biodiversity in extensively cleared landscapes. In this study, we compared reptile communities in large conservation parks with those in small woodland remnants 6.5-12km from the parks, on the Eyre Peninsula, South Australia, Australia. We assessed the impact of fragmentation on the abundance, richness and habitat preferences of reptiles, and examined whether connection to linear roadside vegetation altered reptile communities in small woodland remnants. Of the 31 reptile species, 12 were restricted to conservation parks and six to habitat fragments in farmland. There was a substantial reduction in reptile species richness and abundance in farmland fragments. Direct connection of remnant vegetation to roadside corridors did not affect abundance of common species in the farmland fragments, although species richness was lower in isolated remnants in one of our two study regions. The habitat preference of the scincid lizard Menetia greyii differed between farmland fragments, where they were regularly found on dunes and roadsides, and conservation parks, where they were rare and not detected on dunes. We suggest that habitat fragmentation may have altered interspecific interactions, enabling an expansion of habitat use in the farming landscape. Significantly lower abundance of four common species in farmland settings compared with reserves indicated that existing corridors and small fragments provide inadequate connectivity over larger distances. To counter this effect, large reserves may need to be less than 10km apart.

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Con el fin de la unipolaridad no sólo se fortalecieron mecanismos de gobernanza global como los Regímenes Internacionales, sino también se fortalecieron actores no estatales. A pesar de la importancia que tomaron estos dos elementos aún no existe una teoría que explique exhaustivamente la relación que existe entre ellos. Es por lo anterior que, la investigación busca responder de qué manera el rol de las Redes de Apoyo Transnacional ha incidido en la evolución del régimen de tráfico de personas en la Región del Mekong. Asimismo tiene como objetivo comprender las relación entre el Régimen y las Redes de Apoyo Transnacional a través de la formulación de un caso de estudio basado en metodologías cualitativas, específicamente, en el análisis teórico-constructivista y el análisis de contenido de documentos producidos por actores estatales y no estatales.

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En el presente documento vamos a explicar el modelo de implementación y ejecución de la empresa Outlanders Colombia, dedicada al ofrecimiento de experiencias de ecoturismo a un público local y extranjero ubicado en Bogotá principalmente caracterizado por ser dinámico y buscar la realización de actividades de contacto con la naturaleza. Para el año 2018 queremos posicionarnos como una empresa referente en nuestro sector por ofrecer servicios de alta calidad en los destinos que abarcamos. Adicionalmente buscaremos concretar la realización de alianzas y acuerdos de cooperación con universidades, ONG´s y demás entidades que puedan ser fuentes de usuarios para nuestras actividades. Por otra parte y aprovechando un eventual escenario de paz en nuestro país, continuaremos con la exploración de lugares de alto atractivo natural en toda Colombia y seguiremos con nuestro modelo de desarrollo de alianzas con operadores y guías turísticos locales que tengan experiencia en la atención al mercado local y se adecúen a la gestión de calidad que planteamos para la prestación de servicios a un público más exigente. Dentro de nuestro portafolio actual ofrecemos productos enmarcados en 4 categorías distintas: Actividades de 1 día, Experiencias en ambientes naturales, recorridos por corredores turísticos y expediciones técnicas. En un futuro cercano desarrollaremos una nueva categoría: Inmersiones etnográficas, en donde pretendemos que nuestro cliente comparta con comunidades indígenas y socialmente lejanas al pensamiento occidental. Para hacer conocer al cliente potencial de nuestros servicios, realizaremos inicialmente caminatas y recorridos gratuitos en donde la gente interesada en actividades outdoor tenga una “muestra gratis” de nuestros servicios. Adicionalmente estamos en proceso de consolidación de alianzas para la promoción de nuestros servicios en entidades con flujo de clientes potenciales: Universidades, ONG´s, colegios, etc. Para complementar nuestra estrategia de publicidad y mercadeo realizaremos una fuerte presencia en redes sociales y canales virtuales de mercadeo. Sabemos de la gran influencia que tiene el componente audiovisual en la promoción de nuestros servicios por lo que nos enfocaremos en mostrar imágenes de lugares con alto atractivo natural por nuestros medios virtuales. Por otra parte sabemos de la importancia de ofrecer un servicio de alta calidad a nuestros turistas, por lo que nos aseguraremos de contar con equipo y personal adecuado para el desarrollo de las actividades. Programas de aseguramiento de la calidad y mejora continua son para nosotros una prioridad. Nuestro equipo inicialmente se compone de dos personas, que se encargan inicialmente de desarrollar labores en las dos principales áreas con las que por el momento cuenta la empresa: Logística y Marketing. Sin embargo para la realización de nuestras actividades contratamos temporalmente (dependiendo de la duración de los viajes) los servicios de expertos, guías y una serie de terceros preferiblemente provenientes de los lugares que visitamos. Actualmente contamos con experiencia en el sector con un acumulado de más de 30 viajes organizados en distintos destinos dentro del país que hacen parte de nuestro portafolio. Nos visualizamos como expertos en la realización de viajes destinos de difícil acceso en el país y así mismo nos queremos posicionar como una empresa ambiental y socialmente responsable con un modelo financiero sostenible.

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Logistic regression is a statistical tool widely used for predicting species’ potential distributions starting from presence/absence data and a set of independent variables. However, logistic regression equations compute probability values based not only on the values of the predictor variables but also on the relative proportion of presences and absences in the dataset, which does not adequately describe the environmental favourability for or against species presence. A few strategies have been used to circumvent this, but they usually imply an alteration of the original data or the discarding of potentially valuable information. We propose a way to obtain from logistic regression an environmental favourability function whose results are not affected by an uneven proportion of presences and absences. We tested the method on the distribution of virtual species in an imaginary territory. The favourability models yielded similar values regardless of the variation in the presence/absence ratio. We also illustrate with the example of the Pyrenean desman’s (Galemys pyrenaicus) distribution in Spain. The favourability model yielded more realistic potential distribution maps than the logistic regression model. Favourability values can be regarded as the degree of membership of the fuzzy set of sites whose environmental conditions are favourable to the species, which enables applying the rules of fuzzy logic to distribution modelling. They also allow for direct comparisons between models for species with different presence/absence ratios in the study area. This makes themmore useful to estimate the conservation value of areas, to design ecological corridors, or to select appropriate areas for species reintroductions.

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Context Understanding connectivity patterns in relation to habitat fragmentation is essential to landscape management. However, connectivity is often judged from expert opinion or species occurrence patterns, with very few studies considering the actual movements of individuals. Path selection functions provide a promising tool to infer functional connectivity from animal movement data, but its practical application remains scanty. Objectives We aimed to describe functional connectivity patterns in a forest carnivore using path-level analysis, and to explore how connectivity is affected by land cover patterns and road networks. Methods We radiotracked 22 common genets in a mixed forest-agricultural landscape of southern Portugal. We developed path selection functions discriminating between observed and random paths in relation to landscape variables. These functions were used together with land cover information to map conductance surfaces. Results Genets moved preferentially within forest patches and close to riparian habitats. Functional connectivity declined with increasing road density, but increased with the proximity of culverts, viaducts and bridges. Functional connectivity was favoured by large forest patches, and by the presence of riparian areas providing corridors within open agricultural land. Roads reduced connectivity by dissecting forest patches, but had less effect on riparian corridors due to the presence of crossing structures. Conclusions Genet movements were jointly affected by the spatial distribution of suitable habitats, and the presence of a road network dissecting such habitats and creating obstacles in areas otherwise permeable to animal movement. Overall, the study showed the value of path-level analysis to assess functional connectivity patterns in human-modified landscapes.

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The Atlantic Forest is one of the most diverse areas in the world and considered a hotspot. Several actions are needed for its preservation, among them the implementation of the Biodiversity Corridors. The Atlantic Forest has three biodiversity corridors and the Rio de Janeiro State, which harbors huge species diversity, is in the Serra do Mar Corridor. We developed socioeconomic, political and environmental indicators to present conservation strategies supported by a wide database. These indicators complemented the previous surveys of priority areas which emphasized biotic elements, and their integration allowed the elaboration of strategies for the conservation and management, regionally directed, to support actions to be implemented by the Government. The analysis was done considering three subjects: Anthropic Pressure, Physical and Biotic State, and Present Ability of Response. Data analysis followed a synthesis-aggregation schedule and the resulting database was taken to a workshop, where specialists proposed strategies and actions for the conservation. These strategies were discussed considering vegetation remnant distribution, biological relevance, environmental vulnerability, kind of anthropic pressure in the region and potential for success of the actions proposed, based on the ability of response. Rio de Janeiro State is very diverse in biotic, physical, political, socioeconomic and cultural aspects which demand specific actions for each region. So, depending on the present situation of the natural and anthropic environments and on the present and future sources of degradation, regionally directed actions are applicable. This specificity in conservation actions will enable that the State remnants will be more successfully protected.

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La visión bioregional de la conservación es reciente en Brasil. El planeamiento de mosaicos de las áreas protegidas con las intervenciones previstas en la zona tapón es un alternativa para corregir los dibujos actuales de áreas de protección. Lo Continuum Ecológico de Paranapicaba en el estado de Sâo Paulo (Brasil) se puede considerar uno de los corredores restantes más importantes de Mata Atlântica, reducidos hoy solamente a 7.3% de su extensión original. El Continuum Ecológico de Paranapiacaba tiene un alto nivel de biodiversidad. Se caracteriza por la vegetación que presenta gran diversidad estructural, y por lo tanto, así como  la presencia de  las  especie-llaves  endémicas, que  requieren  los  esfuerzos  efcientes para su conservación. Las estrategias que vienen siendo adoptados por  los parceiros de  la conservación buscan demostrar que es posible construir las ofertas adecuadas del uso y de la exploración sostenible de los recursos naturales. El empalme de algunas iniciativas socioambientales con el mosaico de las unidades de conservación, busca una “buena vecindad” a las unidades de la conservación que se hallan en el área-núcleo del Continuum. Palabras clave: Mata Atlântica, bosque lluvioso, buffer zone, conservación, áreas protegidas Abstract The bioregional vision of the conservation is recent in Brazil. The planning of mosaics of areas protected with interventions planned in the buffer zone is an alternative to correct the current drawings of Protecting Areas. The ecological Continuum of Paranapicaba in  the State of São Paulo  (Brazil) can be considered one of  the most  important  remaining corridors of Atlantic Rainforest, today reduced only 7.3% of its original extension. High level of biodiversity  is characterized by forest vegetation  that presents great structural diversity, and consequently, as well as presence of endemic species-keys, that require effcient efforts for its conservation. The strategies that come being adopted for partners of the conservation search to demonstrate that it is possible to construct to adequate proposals of use and sustainable exploration of the natural resources. The joint of the some social-environmental initiatives with the mosaic of Units of Conservation, searchs to construct a “good neighborhood” to the Units of Conservation that if fnd in the area-nucleus of Continuum.Key words: Mata Atlântica, rainforest, buffer zone, conservation, áreas protegidas