Recursos de colección

UTL Repository Universidade Técnica de Lisboa (37.000 recursos)

O Repositório Institucional da Universidade Técnica de Lisboa desenvolvido no âmbito do projecto RCAAP. Este repositório destina-se a recolher, preservar e disponibilizar o acesso às publicações científicas e didácticas de seis: Escolas da UTL: Faculdade de Medicina Veterinária, Instituto Superior de Agronomia, Instituto Superior de Economia e Gestão, Instituto Superior de Ciências Sociais e Políticas , Faculdade de Motricidade Humana, Faculdade de Arquitectura. O Instituto Superior Técnico, igualmente Escola Da UTL, tem repositório independente.

Mostrando recursos 1 - 20 de 37

  1. Ichthyiological collection of the Museu Oceanográfico D. Carlos I

    Silva, Ana Serra; Groz, Maria Pitta; Leandro, Paula; Assis, Carlos A.; Figueira, Rui
    Data Paper

  2. Traditional knowledge and cultural importance of Borassus aethiopum Mart. in Benin: interacting effects of socio-demographic attributes and multi-scale abundance

    Salako, Kolawole Valère; Moreira, Francisco; Gbedomon, Rodrigue Castro; Tovissodé, Frédéric; Assogbadjo, Achille Ephrem; Kakai, Romain Lucas Glèlè

  3. Population persistence in landscapes fragmented by roads: disentangling isolation, mortality and the effect of dispersal

    Ceia-Hasse, Ana; Navarro, Laetitia M.; Borda-de-Água, Luís; Pereira, Henrique M.
    Linear infrastructures, one of several forms of land-use, are a major driver of biodiversity loss. Roads impact populations at many levels, with direct road mortality and barrier effect contributing to decreased population abundance, higher isolation and subdivision, and therefore to increased extinction risk. In this paper, we compared the effect of road mortality and of the barrier effect on population isolation, persistence and size, and assessed the interaction of these effects with dispersal. We used a spatially explicit, process-based model of population dynamics in landscapes fragmented by varying levels of road density. We modelled a barrier effect independently from road mortality by varying the probability with...

  4. Growing old, yet staying young: the role of telomeres in bat's exceptional longevity

    Foley, Nicole M.; Hughes, Graham M.; Huang, Zixia; Clarke, Michael; Jebb, David; Whelan, Conor V.; Petit, Eric J.; Touzalin, Frédéric; Farcy, Olivier; Jones, Gareth; Ransome, Roger D.; Kacprzyk, Joanna; O'Connell, Mary J.; Kerth, Gerald; Rebelo, Hugo; Rodrigues, Luísa; Puechmaille, Sébastien J.; Teeling, Emma C.
    Research Article - Genetics

  5. Networks of global bird invasion altered by regional trade ban

    Reino, Luís; Figueira, Rui; Beja, Pedro; Araújo, Miguel B.; Capinha, César; Strubbe, Diederik
    Research Article - Ecology

  6. Stakeholders perceptions of endangered Egyptian vulture: insights for conservation

    Cortés-Avizanda, Ainara; Martín-López, Berta; Ceballos, Olga; Pereira, Henrique M.
    The inclusion of perceptions, interests and needs of stakeholders in biodiversity conservation is critical for the long-term protection of endangered species. Yet, the social dimensions of endangered species conservation are often overlooked. We examined the social perceptions of the conservational importance of the globally endangered Egyptian vulture (Neophron percnopterus) in one of the most important breeding areas worldwide: the Bardenas Reales Protected Area, northern Spain. We assessed the factors that influence the stakeholders' views of its conservation importance and identified the management strategies that would have social support. We found that the understandings of the Egyptian vulture differed among stakeholders. Hunters had the highest level of knowledge...

  7. A insídia das formas - ensaio semiótico relativo a "Rio Timor" no atlas Vallard e "Brasilia inferior" no globo de Schoner

    Casquilho, José Pinto
    Neste ensaio, partindo-se da menção “Rio timor” no Atlas Vallard datado de 1547, procura-se reconstituir a origem primeva da informação, sustentando-se a hipótese de que os portugueses foram os primeiros europeus a fazer o reconhecimento da linha de costa do que hoje designamos como Austrália. Nessa demanda, conclui-se que existem relatos de cronistas e outros, que permitem situar Francisco Serrão como uma fonte de informação na região das Molucas – mencionando, em cartas, um “um novo mundo” com vasta extensão - que teria sido encaminhada para Portugal, aí chegando cerca de 1515, incluindo padrão. Infere-se que terá sido essa uma origem provável da representação cartográfica de Brasilie Regio...

  8. The collection of birds from Mozambique at the Instituto de Investigação Científica Tropical of the University of Lisbon (Portugal)

    Monteiro, Miguel; Figueira, Rui; Melo, Martim; Mills, Michael Stuart Lyne; Beja, Pedro; Bastos-Silveira, Cristiane; Ramos, Manuela; Rodrigues, Diana; Neves, Isabel Queirós; Consciência, Susana; Reino, Luís
    The Instituto de Investigação Científica Tropical of the University of Lisbon, which resulted from the recent merger (in 2015) of the former state laboratory Instituto de Investigação Científica Tropical in the University of Lisbon, holds an important collection of bird skins from the Portuguese-speaking African Countries (Angola, Mozambique, São Tomé and Príncipe, Guinea Bissau and Cape Verde), gathered as a result of several scientific expeditions made during the colonial period. In this paper, the subset from Mozambique is described, which was taxonomically revised and georeferenced. It contains 1585 specimens belonging to 412 taxa, collected between 1932 and 1971, but mainly in 1948 (43% of specimens) and 1955...

  9. The orthoptera of Castro Verde special protection area (Southern Portugal): new data and conservation value

    Pina, Sílvia; Vasconcelos, Sasha; Reino, Luís; Santana, Joana; Beja, Pedro; Sánchez-Olivier, Juan S.; Catry, Inês; Moreira, Francisco; Ferreira, Sónia
    With the increasing awareness of the need for Orthoptera conservation, greater efforts must be gathered to implement specific monitoring schemes. Despite recent surveys, little is known about Portuguese Orthoptera populations. This study was performed in 2014 and 2015 mainly in Castro Verde Special Protection Area (SPA), southern Portugal, and is the first Orthoptera inventory conducted in the area. A total of 35 Orthoptera species was recorded, with two new species reported for Portugal. We provide species’ habitat occurrences within the protected area and use information on the conservation status and the Iberian distribution of each documented species to discuss the importance of Castro Verde SPA for...

  10. Match between soaring modes of black kites and fine-scale distribution on updrafts

    Santos, Carlos D.; Hanssen, Frank; Muñoz, António-Román; Onrubia, A.; Wikelski, Martin; May, Roel; Silva, João P.
    Understanding how soaring birds use updrafts at small spatial scales is important to identify ecological constraints of movement, and may help to prevent conflicts between wind-energy development and the conservation of wildlife. We combined high-frequency GPS animal tracking and fine-spatial-scale uplift modelling to establish a link between flight behaviour of soaring birds and the distribution of updrafts. We caught 21 black kites (Milvus migrans) and GPS-tracked them while flying over the Tarifa region, on the Spanish side of the Strait of Gibraltar. This region has a diverse topography and land cover, favouring a heterogeneous updraft spatial distribution. Bird tracks were segmented and classified into flight modes from...

  11. Fungal infestation boosts fruit aroma and fruit removal by mammals and birds

    Peris, Josep E.; Rodriguez, Ana; Peña, Leandro; Fedriani, José Maria
    For four decades, an influential hypothesis has posited that competition for food resources between microbes and vertebrates selects for microbes to alter these resources in ways that make them unpalatable to vertebrates. We chose an understudied cross kingdom interaction to experimentally evaluate the effect of fruit infection by fungi on both vertebrate (mammals and birds) fruit preferences and on ecologically relevant fruit traits (volatile compounds, toughness, etc). Our well-replicated field experiments revealed that, in contrast to previous studies, frugivorous mammals and birds consistently preferred infested over intact fruits. This was concordant with the higher level of attractive volatiles (esters, ethanol) in infested fruits. This investigation suggests that...

  12. Dispersal ability determines the scaling properties of species abundance distributions: a case study using arthropods from the Azores

    Borda-de-Água, Luís; Whittaker, Robert J.; Cardoso, Pedro; Rigal, François; Santos, Ana M.C.; Amorim, Isabel R.; Parmakelis, Aristeidis; Triantis, Kostas A.; Pereira, Henrique M.; Borges, Paulo A.
    Species abundance distributions (SAD) are central to the description of diversity and have played a major role in the development of theories of biodiversity and biogeography. However, most work on species abundance distributions has focused on one single spatial scale. Here we used data on arthropods to test predictions obtained with computer simulations on whether dispersal ability influences the rate of change of SADs as a function of sample size. To characterize the change of the shape of the SADs we use the moments of the distributions: the skewness and the raw moments. In agreement with computer simulations, low dispersal ability species generate a hump for...

  13. Conservation status of a recently described endemic land snail, Candidula coudensis, from the Iberian Peninsula

    Moreira, Francisco; Calado, Gonçalo; Dias, Susana
    Research Article

  14. Estimation of productivity in pine and oak forests in northern Portugal using Biome-BGC

    Nunes, Leónia; Gower, Stith T.; Peckham, Scott D.; Magalhães, Marco; Lopes, Domingos; Rego, Francisco Castro
    Studies about the productivity of forest ecosystems help to quantify sequestered carbon and provide data that are used in forest management. Forests in northern Portugal are an important economic resource, but their productivity in scenarios of future climate change is not yetwell understood. The objectives of this study were to evaluate and compare simulated net primary production (NPP) andNPPbased onmeasured data of twotree species located in the Vila Real district forests, pine (Pinus pinaster Aiton) and oak (Quercus pyrenaica Willd.) and assess their simulatedNPPin diverse climate conditions, including future climate scenariosandincreasing atmospheric CO2 concentrations. An ecosystem process model, Biome-BGC, which simulates carbon, nitrogen and water cycles...

  15. Mixed effects of long-term conservation investment in Natura 2000 farmland

    Santana, Joana; Reino, Luís; Stoate, Chris; Borralho, Rui; Carvalho, Carlos Rio; Schindler, Stefan; Moreira, Francisco; Bugalho, Miguel N.; Ribeiro, Paulo Flores; Santos, José Lima; Vaz, Alexandre; Morgado, Rui; Porto, Miguel; Beja, Pedro
    Evaluating the effectiveness of conservation funding is crucial for correct allocation of limited resources. Here we used bird monitoring data to assess the effects of long-term conservation investment in a Natura 2000 (N2000) bird protection area (PA), which during two decades benefited from protection regulations, conservation projects, and agri-environment schemes. Variation between 1995–1997 and 2010–2012 in richness and abundance of flagship (Otis tarda, Tetrax tetrax, and Falco naumanni) and specialized fallow field species were more favorable (i.e., increased more or declined less) inside the PA than in a nearby control area. However, the reverse was found for total bird species, farmland, ground-nesting and steppe species, species associated to ploughed fields,...

  16. Modeling stream fish distributions using interval-censored detection times

    Ferreira, Mário; Filipe, Ana Filipa; Bardos, David C.; Magalhães, Maria Filomena; Beja, Pedro
    Controlling for imperfect detection is important for developing species distribution models (SDMs). Occupancy-detection models based on the time needed to detect a species can be used to address this problem, but this is hindered when times to detection are not known precisely. Here, we extend the time-to-detection model to deal with detections recorded in time intervals and illustrate the method using a case study on stream fish distribution modeling. We collected electrofishing samples of six fish species across a Mediterranean watershed in Northeast Portugal. Based on a Bayesian hierarchical framework, we modeled the probability of water presence in stream channels, and the probability of species occupancy conditional on water...

  17. Predicting bat distributions and diversity hotspots in southern Africa

    Cooper-Bohannon, Rachael; Rebelo, Hugo; Jones, Gareth; Cotterill, Fenton; Monadjem, Ara; Schoeman, M.Corrie; Taylor, Peter; Park, Kirsty
    Species distribution models were used to predict bat species richness across southern Africa and to identify potential drivers of these spatial patterns. We also identified species richness within each biotic zone and the distributions of species considered of high conservation priority. We used this information to highlight conservation priorities for bats in southern Africa (defined here as between the latitudes of 8° S, slightly north of Zambia, to the southern tip of Africa 34° S, an area of approximately 9781840 km2). We used maximum entropy modelling (Maxent) to model habitat suitability for 58 bat species in order to determine the key eco-geographical variables influencing their distributions. The...

  18. High unexpected genetic diversity of a narrow endemic terrestrial mollusc

    Madeira, Pedro M.; Chefaoui, Rosa M.; Cunha, Regina L.; Moreira, Francisco; Dias, Susana; Calado, Gonçalo; Castilho, Rita
    The Iberian Peninsula has an extensive record of species displaying strong genetic structure as a result of their survival in isolated pockets throughout the Pleistocene ice ages. We used mitochondrial and nuclear sequence data to analyze phylogeographic patterns in endemic land snails from a valley of central Portugal (Vale da Couda), putatively assigned to Candidula coudensis, that show an exceptionally narrow distributional range. The genetic survey presented here shows the existence of five main mitochondrial lineages in Vale da Couda that do not cluster together suggesting independent evolutionary histories. Our results also indicate a departure from the expectation that species with restricted distributions have low genetic variability. The putative...

  19. Wired: impacts of increasing power line use by a growing bird population

    Moreira, Francisco; Encarnação, Vitor; Rosa, Gonçalo; Gilbert, Nathalie; Infante, Samuel; Costa, Julieta; D'Amico, Marcello; Martins, Ricardo C.; Catry, Inês
    Power lines are increasingly widespread across many regions of the planet. Although these linear infrastructures are known for their negative impacts on bird populations, through collision and electrocution, some species take advantage of electricity pylons for nesting. In this case, estimation of the net impact of these infrastructures at the population level requires an assessment of trade-offs between positive and negative impacts. We compiled historical information (1958–2014) of the Portuguese white stork Ciconia ciconia population to analyze long-term changes in numbers, distribution range and use of nesting structures. White stork population size increased 660% up to 12000 breeding pairs between 1984 and 2014. In the same period,...

  20. Regional bans on wild-bird trade modify invasion risks at a global scale

    Cardador, Laura; Lattuada, Matteo; Strubbe, Diederik; Tella, José L.; Reino, Luís; Figueira, Rui; Carrete, Martina
    Wildlife trade is currently the most important and increasing source of vertebrate invasive species. However, exhaustive analyses of potential side effects of trade regulations on this pathway of introduction are lacking. We addressed this by combining environmental niche models and global trade data on parrots (Psittaciformes), one of the most widely traded and worldwide invasive taxa. We used the wild bird trade bans of United States (1992) and Europe (2005) as case-studies. Results showed that regional bans can generate geographic redirections in trade, with important consequences on worldwide invasion risk. While the amount of parrots traded internationally remained largely constant, changes in trade destination occurred. Consequently, the world surface predicted...

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