Recursos de colección

UTL Repository Universidade Técnica de Lisboa (32.085 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.

DRAT - Departamento dos Recursos Naturais, Ambiente e Território

Mostrando recursos 1 - 7 de 7

  1. Nutrient removal effectiveness by riparian buffer zones in rural temperate watersheds: the impact of no-till crop practices

    Aguiar Jr., T.R.; Rasera, K.; Parron, L.M.; Brito, A.G.; Ferreira, M.T.
    Riparian buffer zones have the potential to capture chemical contaminants and to mitigate detrimentalside-effects in aquatic ecosystems derived from excess fertilizers used in agro-food production. No-tillfarming systems are well known agricultural practices and are widely used in temperate areas. In thatregard, different settings and widths of riparian buffer zones (12, 24, 36, 48 and 60 m) with woody veg-etation, shrubs or grasses were assessed. The methodology was comprised of the evaluation of a largenumber of experimental sites and the sampling was conducted after the first rain period and respectivefertilizer applications. The results point to the fact that effectiveness is largely...

  2. Guia geobotânico da excursão ao Parque Natural das serras de Aires e Candeeiros

    Costa, José Carlos; Espírito Santo, Maria Dalila; Arsénio, Pedro
    info:eu-repo/semantics/publishedVersion

  3. Concentrations of available heavy metals in Mediterranean agricultural soils and their relation with some soil selected properties: a case study in typical mediterranean soils

    Nunes, José Rato; Ramos-Miras, José; Lopez-Piñeiro, António; Loures, Luís; Gil, Carlos; Coelho, José; Loures, Ana
    The characterization of the content of trace metals in soils is an instrument in many programs of environmental protection, including the establishment of regional-level standards to detect sites affected by contamination. The objectives of the present study were to study the available levels of Cd, Cr, Cu, Ni, Pb, and Zn in surface horizons of agricultural soils in a typical European Mediterranean region, to establish the geochemical baseline concentration (GBC), background level (BL), and reference value (RV) of each of these available metals, and to investigate their possible correlations with soil properties. To establish the GBC and RV values, we used the “standard threshold method”. Topsoil samples...

  4. Landscape valuation of environmental amenities throughout the application of direct and indirect methods

    Loures, Luís; Loures, Ana; Nunes, José; Panagopoulos, Thomas
    Landscape design, construction and management should no longer be the result of superficial approaches based exclusively on designers’ and planners’ ideas. This research starts with the assumption that the aesthetic component constitutes an essential attribute for better understanding and evaluating landscapes. This study analyzes the aesthetic quality and economic valuation of the Lower Guadiana river landscape, through the application of direct and indirect landscape evaluation methods. In order to gauge not only experts’ opinion, it is supported by the application of public participation techniques about the opinion and perceptions of the site visitors/users. The present research considered the analysis of six landscape subunits regarding landscape quality, fragility and...

  5. Protective response mechanisms to heat stress in interaction with high CO2 conditions in Coffea spp.

    Martins, Madlles Q.; Rodrigues, Weverton P.; Fortunato, Ana S.; Leitão, António E.; Rodrigues, Ana P.; Pais, Isabel P.; Martins, Lima D.; Silva, Maria J.; Reboredo, Fernando H.; Partelli, Fábio L.; Campostrini, Eliemar; Tomaz, Marcelo A.; Scotti-Campos, Paula; Ribeiro-Barros, Ana I.; Lidon, Fernando J.C.; DaMatta, Fábio M.; Ramalho, José C.
    Modelingstudieshavepredictedthatcoffeecropwillbeendangeredbyfutureglobalwarming,butrecentreportshighlightedthathigh[CO2]canmitigateheatimpactsoncoffee.ThisworkaimedatidentifyingheatprotectivemechanismspromotedbyCO2inCoffeaarabica(cv.IcatuandIPR108)andCoffeacanephoracv.ConilonCL153.Plantsweregrownat25/20◦C(day/night),under380or700μLCO−2L1,andthengraduallysubmittedto31/25,37/30,and42/34◦C.Relevantheattoleranceupto37/30◦Cforboth[CO2]andallcoffeegenotypeswasobserved,likelysupportedbythemaintenanceorincreaseofthepoolsofseveralprotectivemolecules(neoxanthin,lutein,carotenes,a-tocopherol,HSP70,raffinose),activitiesofantioxidantenzymes,suchassuperoxidedismutase(SOD),ascorbateperoxidase(APX),glutathionereductase(GR),catalase(CAT),andtheupregulatedexpressionofsomegenes(ELIP,Chaperonin20).However,at42/34◦Catolerancethresholdwasreached,mostlyinthe380-plantsandIcatu.Adjustmentsinraffinose,lutein,b-carotene,a-tocopherolandHSP70pools,andtheupregulatedexpressionofgenesrelatedtoprotective(ELIPS,HSP70,Chape20,and60)andantioxidant(CAT,CuSOD2,APXCyt,APXChl)proteinswerelargelydrivenbytemperature.However,enhanced[CO2]maintainedhigheractivitiesofGR(Icatu)andCAT(IcatuandIPR108),kept(orevenincreased)theCu,Zn-SOD,APX,andCATactivities,andpromotedagreaterupregulationofthoseenzymegenes,aswellasthoserelatedtoHSP70,ELIPs,ChaperoninsinCL153,andIcatu.Thesechangeslikelyfavoredthemaintenanceofreactiveoxygenspecies(ROS)atcontrolledlevelsandcontributedtomitigateofphotosystemIIphotoinhibitionatthehighesttemperature.Overall,ourresultshighlightedtheimportantroleofenhanced[CO2]onthecoffeecropacclimationandsustainabilityunderpredictedfutureglobalwarmingscenarios

  6. Vegetation and landscape of Serra de Montejunto

    Espírito Santo, Maria Dalila; Moreira, Ilídio; González, Patrícia Rodriguez
    info:eu-repo/semantics/publishedVersion

  7. As comunidades Asparago albi-Rhamnion oleoidis Rivas Goday ex Rivas-Martínez 1975 do Sector Divisório Português

    Costa, José Carlos; Espírito Santo, Maria Dalila; Lousã, Mário
    info:eu-repo/semantics/publishedVersion

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