Recursos de colección

Repositorio da Universidade dos Açores (9.269 recursos)

O Repositório Institucional da Universidade dos Açores desenvolvido no âmbito do projecto RCAAP.

Departamento de Ciências Agrárias

Mostrando recursos 1 - 20 de 260

  1. Produção e utilização de composto na cultura do milho

    Araújo, Diogo Ferreira
    Dissertação de Mestrado, Engenharia Agronómica, 16 de janeiro de 2018, Universidade dos Açores.

  2. Zonas húmidas construídas para tratamento complementar de efluentes domésticos : ensaio experimental na ETAR de Angra do Heroísmo

    Rio, Pedro Soares Brito
    Dissertação de Mestrado, Engenharia e Gestão de Sistemas de Água, 24 de março de 2017, Universidade dos Açores.

  3. Caracterização farmacológica de diferentes partes da planta Vaccinium cylindraceum endémica dos Açores tendo em vista a sua valorização como alimento funcional e nutracêutico

    Lima, Vera Catarina Branco Furtado
    Dissertação de Mestrado, Tecnologia e Segurança Alimentar, 23 de março de 2017, Universidade dos Açores.

  4. The biodiversity of terrestrial arthropods in Azores

    Rego, Carla; Boieiro, Mário; Vieira, Virgílio; Borges, Paulo A. V.
    […]. El Departamento de Biología de la Universidad de las Azores organizó un total de 15 expediciones científicas en el periodo 1977-2011, que dieron lugar a varias publicaciones incluyendo muchas sobre los Lepidoptera del archipiélago (Carneiro, 1982; Carvalho, 1982, 1984, 1992; Guimarães, 1982; Sousa, 1982, 1985a, b, 1991, 1999; Meyer, 1991a, b; Vieira & Pintureau, 1991, 1993; Henderickx, 1995; Vieira, 1997, 2003, 2009; Carvalho et al., 1999; Tennent & Sousa, 2003; Vieira et al., 2003a; Karsholt & Vieira, 2005; Vieira & Karsholt, 2010). Desde 1975 a 1990, se realizaron estudios autoecológicos centrados en plagas agrícolas y sus parásitos, tales como Mythimna...

  5. The biodiversity of terrestrial arthropods in Madeira and Selvagens archipelagos

    Boieiro, Mário; Aguiar, António F.; Rego, Carla; Borges, Paulo A. V.; Serrano, Artur R. M.
    […]. El número de taxones de artrópodos terrestres citado de los archipiélagos de Madeira y Salvajes es respectivamente 3.801 y 201, entre los que hay un número significativo de endemismos (Borges et al., 2008b) (ver Tabla I; Fig. 5; Lámina II). Madeira, la isla más grande, con una orografía compleja y con el número mayor de diferentes tipos de hábitat, destaca claramente sobre las otras islas de los dos archipiélagos tanto en la riqueza de especies como en el número de taxones endémicos. Sin embargo, también se debe tener en cuenta que la biodiversidad de Madeira se ha estudiado más...

  6. Sympherobius Banks, 1904, a new hemerobid genus for the Azorean archipelago (Neuroptera: Hemerobiidae)

    Letardi, Agostino; Ponte, Nuno B.; Borges, Paulo A. V.
    É apresentado nesta nota o primeiro registo do género Sympherobius Banks, 1904 (Neuroptera: Hemerobiidae) para os Açores. A fauna de Neuroptera dos Açores é agora composta por oito espécies, cinco géneros e duas famílias.

  7. Calling for a new strategy to measure environmental (habitat) diversity in Island Biogeography : a case study of Mediterranean tenebrionids (Coleoptera, Tenebrionidae)

    Fattorini, Simone; Dapporto, Leonardo; Strona, Giovanni; Borges, Paulo A. V.
    Many recent researches in island biogeography attempted to disentangle the effects of area per se and "habitat diversity" on species richness. However, the expression "habitat diversity" in this context should be avoided, because habitats can be only recognized by referring to the resources needed by a particular species. What is really measured in such researches is some form of “environmental heterogeneity”. Although habitat heterogeneity can be measured in various ways, most researches in island biogeography simply used the number of biotopes (typically classified as land cover categories). However, not all biotopes have the same surface.On the basis of the area...

  8. Drivers of extinction : the case of Azorean beetles

    Terzopoulou, Sofia; Rigal, François; Whittaker, Robert J.; Borges, Paulo A. V.; Triantis, Kostas A.
    Oceanic islands host a disproportionately high fraction of endangered or recently extinct endemic species. We report on species extinctions among endemic Azorean beetles following 97% habitat loss since AD 1440. We infer extinctions from historical and contemporary records and examine the influence of three predictors: geographical range, habitat specialization and body size. Of 55 endemic beetle species investigated (out of 63), seven can be considered extinct. Single-island endemics (SIEs) were more prone to extinction than multi-island endemics. Within SIEs restricted to native habitat, larger species were more extinction-prone. We thus show a hierarchical path to extinction in Azorean beetles: species...

  9. Two new species of Tarphius Erichson, 1848 (Coleoptera, Colydiidae) from the Azores

    Borges, Paulo A. V.
    Duas novas espécies do género Tarphius são descritas, T. pombal sp.n. e T. serranoi sp.n.. Estas espécies foram capturadas durante a Expedição Zoológica da Universidade dos Açores (Junho 1990) à ilha de S. Maria, Açores. Fazem-se igualmente alguns comentários sobre a distribuição e origem das espécies de Tarphius dos Açores. Apresenta-se uma chave para as espécies de Tarphius deste arquipélago.

  10. Marine biodiversity of Sete Cidades shallow coasts

    Barreiros, João P.
    Sendo os Açores a região mais isolada do Atlântico Norte, a sua biodiversidade marinha reflecte não apenas essa característica bem como influências de vários locais que o tornam único. O Arquipélago localiza-se perto da crista meso-atlântica estando as ilhas dos grupos central e oriental localizadas na microplaca dos Açores e as do grupo ocidental na placa americana. A latitude média do Arquipélago ronda os 39ºN, ou seja, quase a mesma de Lisboa ou de Nova Iorque embora sem os Invernos e Verões rigorosos daquelas cidades e caracterizando- se por uma baixa amplitude térmica com temperaturas entre valores de conforto térmico...

  11. The colonisation of exotic species does not have to trigger faunal homogenisation : lessons from the assembly patterns of arthropods on oceanic islands

    Florencio, Margarita; Lobo, Jorge M.; Cardoso, Pedro; Almeida-Neto, Mário; Borges, Paulo A. V.
    Human-caused disturbances can lead to the extinction of indigenous (endemic and native) species, while facilitating and increasing the colonisation of exotic species; this increase can, in turn, promote the similarity of species compositions between sites if human-disturbed sites are consistently invaded by a regionally species-poor pool of exotic species. In this study, we analysed the extent to which epigean arthropod assemblages of four islands of the Azorean archipelago are characterised by nestedness according to a habitat-altered gradient. The degree of nestedness represents the extent to which less ubiquitous species occur in subsets of sites occupied by the more widespread species,...

  12. The iterative process of plant species inventorying for obtaining reliable biodiversity patterns

    Aranda, Silvia C.; Hespanhol, Helena; Homem, Nídia; Borges, Paulo A. V.; Lobo, Jorge M.; Gabriel, Rosalina
    We require representative data of species occurrence to explain plant diversity patterns, but most of the available information is incomplete and biased. To improve our knowledge, we suggest that species inventorying should be an iterative process encompassing the following: (1) the detection of taxonomic and geographical gaps; (2) the planning of a survey design to reduce such gaps; and (3) the evaluation of field sampling results. Here, we focus on the latter phase for the bryophytes of Terceira Island (Azores) for which we have previously estimated < 1% of the area as well surveyed based on historical collections. To examine the...

  13. Avaliação da suscetibilidade a movimentos de vertente na zona oeste da ilha Terceira

    Miguel, Alonso Teixeira
    Tese de Doutoramento, Gestão Interdisciplinar da Paisagem, 9 de junho de 2017, Universidade dos Açores.

  14. An approach to evaluate aerosol optical depth at marine boundary layer : the Pico-Graciosa measurement platform

    Henriques, Diamantino; Carvalho, Fernanda; Fialho, Paulo
    Workshop: An opportunity for international cooperation on atmospheric sciences, Lisboa, 2015 (Comunicação).

  15. Some Aerosol Optical Measurements at Pico Mountain Observatory

    Fialho, Paulo; Mazzoleni, Claudio
    Workshop: An opportunity for international cooperation on atmospheric sciences, Lisboa, 2015 (Comunicação).

  16. Climatology and atmospheric chemistry of the non-methane hydrocarbons ethane and propane over the North Atlantic

    Helmig, Detlev; Muñoz, Mauricio; Hueber, Jacques; Mazzoleni, Claudio; Mazzoleni, Lynn R.; Owen, Richard C.; Val-Martin, Maria; Fialho, Paulo; Plass-Duelmer, Christian; Palmer, Paul I.; Lewis, Alastair C.; Pfister, Gabriele
    A record spanning ten years of non-methane hydrocarbon (NMHC) data from the Pico Mountain Observatory (PMO), Pico Island, Azores, Portugal, was analyzed for seasonal NMHC behavior, atmospheric processing, and trends, focusing on ethane and propane. The location of this site in the central North Atlantic, at an elevation of 2225 m asl, allows these data to be used to investigate the background conditions and pollution transport events occurring in the lower free North Atlantic troposphere. The quantity ln([propane]/[ethane]) was used as an indicator of both photochemical processing and a marker for the occurrence of pollution transport events detected at the...

  17. Molecular characterization of free tropospheric aerosol collected at the Pico Mountain Observatory : a case study with a long-range transported biomass burning plume

    Dzepina, Katja; Mazzoleni, Claudio; Fialho, Paulo; China, Swarup; Zhang, Bo; Owen, R. Chris; Helmig, Detlev; Hueber, Jacques; Kumar, Sumit; Perlinger, Judith A.; Kramer, Louisa; Dziobak, Michael P.; Ampadu, Marian T.; Olsen, Seth C.; Wuebbles, Donald J.; Mazzoleni, Lynn R.
    Free tropospheric aerosol was sampled at the Pico Mountain Observatory located at 2225 m above mean sea level on Pico Island of the Azores archipelago in the North Atlantic. The observatory is located ~ 3900 km east and downwind of North America, which enables studies of free tropospheric air transported over long distances. Aerosol samples collected on filters from June to October 2012 were analyzed to characterize organic carbon, elemental carbon, and inorganic ions. The average ambient concentration of aerosol was 0.9 ± 0.7 μg m−3. On average, organic aerosol components represent the largest mass fraction of the total measured...

  18. Alterações Climáticas : O valor estratégico dos Açores

    Fialho, Paulo
    A crescente preocupação com as alterações climáticas tem levado à expansão da rede de monitorização da atmosfera (GAW) na sua vertente química e física. Esta rede tem na sua base as diversas plataformas terrestres de observação da atmosfera que se encontram associadas aos Serviços Nacionais de Meteorologia e de Hidrologia (SNMH) dos diversos países envolvidos no programa. A Organização Mundial de Meteorologia (OMM) pediu aos seus membros (os SMH) que fossem tidas em consideração as medidas da composição química da atmosfera encorajando-os a integrarem nas suas atividades a observação da composição química da atmosfera. […].

  19. Morphology and Mixing State of Aged Soot Particles at a Remote Marine Free Troposphere Site : Implications for Optical Properties

    China, Swarup; Scarnato, Barbara; Owen, Robert C.; Zhang, Bo; Ampadu, Marian T.; Kumar, Sumit; Dzepina, Katja; Dziobak, Michael P.; Fialho, Paulo; Perlinger, Judith A.; Hueber, Jacques; Helmig, Detlev; Mazzoleni, Lynn R.; Mazzoleni, Claudio
    The radiative properties of soot particles depend on their morphology and mixing state, but their evolution during transport is still elusive. Here we report observations from an electron microscopy analysis of individual particles transported in the free troposphere over long distances to the remote Pico Mountain Observatory in the Azores in the North Atlantic. Approximately 70% of the soot particles were highly compact and of those 26% were thinly coated. Discrete dipole approximation simulations indicate that this compaction results in an increase in soot single scattering albedo by a factor of ≤2.17. The top of the atmosphere direct radiative forcing...

  20. Morphology and Mixing State of Aged Soot Particles at a Remote Marine Free Troposphere Site : Implications for Optical Properties

    China, Swarup; Scarnato, Barbara; Owen, Robert C.; Zhang, Bo; Ampadu, Marian T.; Kumar, Sumit; Dzepina, Katja; Dziobak, Michael P.; Fialho, Paulo; Perlinger, Judith A.; Hueber, Jacques; Helmig, Detlev; Mazzoleni, Lynn R.; Mazzoleni, Claudio
    The radiative properties of soot particles depend on their morphology and mixing state, but their evolution during transport is still elusive. Here we report observations from an electron microscopy analysis of individual particles transported in the free troposphere over long distances to the remote Pico Mountain Observatory in the Azores in the North Atlantic. Approximately 70% of the soot particles were highly compact and of those 26% were thinly coated. Discrete dipole approximation simulations indicate that this compaction results in an increase in soot single scattering albedo by a factor of ≤2.17. The top of the atmosphere direct radiative forcing...

Aviso de cookies: Usamos cookies propias y de terceros para mejorar nuestros servicios, para análisis estadístico y para mostrarle publicidad. Si continua navegando consideramos que acepta su uso en los términos establecidos en la Política de cookies.