Recursos de colección

UTL Repository Universidade Técnica de Lisboa (35.475 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 - 11 de 11

  1. Phylogenenetic approach of the section Bulbocodii D.C. of Narcissus based on cpDNA. A case of taxonomic inflation ?

    Fonseca, J.P.; Levy, A.; Henriques, R.; Costa, José Carlos; Neto, C.; Robalo, J.
    In this paper, we analyzed the phylogeny of the section Bulbocodii (genus Narcissus; Amarillydaceae) using the matK and trnL-F fragments of cpDNA in order to review the validity of the recognized taxa. Our results indicate that Narcissus obesus should be considered a valid species, and that N. blancoi is a distinct taxon. In addition, seven previously recognized species, N. juressianus, N. subnivalis, N. graellsii, N. conspicuus, N. citrinus, N. nivalis, and N. quintanilhae, should be assigned to an infraspecific rank under N. bulbocodium, as they are not valid species. In addition, we analyzed the distribution of the three morphological characters widely used in the systematics...

  2. The Galician-Portuguese biogeographic sector. An initial advance

    Rivas-Martinez, S.; Izco, Jesús; Díaz-González, T.; Penas, A.; Costa, José Carlos; Amigo, Javier; Herrero, L.; Giménez de Azcárate, J.; Del Rio, Sara
    Borders of the ten biogeographic districts belonging to the Galician-Portuguese sector are described as wellas its bioclimatic and vegetational features. Bioclimatic diagnoses /isobioclimates) of some weather stations based on their bioclimatic parameters and indices are shown. Finalli, climatophilous, climato-temporihigrophilous and edaphoxerophilous sreies; edaphohigrophilous fluvial and lacustrine geoseries as well as coastal geopermaseries; permaseries and minoriseries, secondary forests are described for each district

  3. Biogeography of Spain and Portugal. Preliminary typological synopsis

    Rivas-Martinez, S.; Penas, A.; Diaz-González, T.E.; Río, S.; Cantó, P.; Herrero, L.; Gomes, C. Pinto; Costa, José Carlos
    A preliminary biogeographical typology of Spain and Portugal is established in the present paper. Two regions, 5 subregions, 13 provinces, 18 subprovinces, 62 sectors and 267 districts are recognized. Its biogeographic content besides nomenclatural changes of those units previously described are shown. Finally, its names in english, spanish and portuguese are stated

  4. Geobotanical survey of Cabo Verde Islands (West Africa)

    Rivas-Martinez, Salvador; Lousã, Mário; Costa, José Carlos; Duarte, Maria Cristina
    The results of the study of the bioclimate, biogeography, flora and vegetation of Cabo Verde Islands, after seven years of field works in all inhabited isles are presented in this paper. Tropical hyperdesertic to pluviseasonal, upper infra- to low supratropical and upper ultrahyperarid to upper dry, and occasionaly lower subhumid (short period years), are the bioclimates in these archipelago. Biogeographically they are situated in the Paleotropical Kingdom, Afrotropical Subkingdom, Tropical Saharan Region, and Cabo Verde Province. Eight new species are described: Acacia caboverdeana, Asphodelus mariolousae, Frankenia pseudoericifolia, Hyparrhenia caboverdeana, Lotus chevalieri, Polycarpaea caboverdeana, Suaeda caboverdeana and Tetraena vicentina, and also fifteen new combinations are proposed. In...

  5. Are vacilins another major class of legume lectins ?

    Ribeiro, Ana C.; Monteiro, Sara V.; Carrapiço, Belmira M.; Ferreira, Ricardo Boavida
    Legume lectins comprise a structurally related, Ca/Mn-dependent, widespread, abundant and well characterized lectin family when compared to the large number of lectins from other sources described in the literature. Strangely enough, no specific function has been assigned to them aside from a possible role in storage and/or defense. Using a recent and fine-tuned methodology capable of specific lectin identification, β-conglutin, Vicia faba vicilin and β-lathyrin, the vicilin storage globulins from Lupinus albus, V. faba and Lathyrus sativus, respectively, were shown to be capable of affinity binding to thoroughly washed erythrocyte membranes and of specific elution with appropriate sugars. Based on this evidence and on sparse data published in...

  6. Taxonomic complexity in the halophyte Limonium vulgare and related taxa (Plumbaginaceae): insights from analysis of morphological, reproductive and karyological data

    Cortinhas, Ana; Erben, Mathias; Paes, Ana Paula; Espírito Santo, Maria Dalila; Guara-Requena, Miguel; Caperta, Ana D.
    Part of a special issue on halophytes and saline adaptations

  7. Flower development and sex specification in wild grapevine

    Ramos, Miguel Jesus Nunes; Coito, João Lucas; Silva, Helena Gomes; Cunha, Jorge; Costa, Maria Manuela Ribeiro; Rocheta, Margarida
    Research Article

  8. A nontoxic polypeptide oligomer with a fungicide potency under agricultural conditions which is equal or greater than that of their chemical counterparts

    Monteiro, Sara; Carreira, Alexandra; Freitas, Regina; Pinheiro, Ana Margarida; Ferreira, Ricardo Boavida
    Research Article

  9. Thermography to explore plant-environment interactions

    Costa, J.Miguel; Grant, Olga M.; Chaves, M.Manuela
    Review Paper

  10. Habitat use at fine spatial scale: how does patch clustering criteria explain the use of meadows by red deer ?

    Bellu, Annalisa; Bugalho, Miguel N.; Monteiro-Henriques, Tiago; Costa, José Carlos; Rego, Francisco Castro
    Large mammalian herbivores are keystone species in different ecosystems. To mediate the effects of large mammalian herbivores on ecosystems, it is crucial to understand their habitat selection pattern. At finer scales, herbivore patch selection depends strongly on plant community traits and therefore its understanding is constrained by patch definition criteria. Our aim was to assess which criteria for patch definition best explained use of meadows by wild, free-ranging, red deer (Cervus elaphus) in a study area in Northeast Portugal. We used two clustering criteria types based on floristic composition and gross forage classes, respectively. For the floristic criteria, phytosociological approach was used to classify plant communities, and its objectivity evaluated with a mathematical...

  11. The impacts of land-use changes on the recovery of saltmarshes in Portugal

    Almeida, Diana; Neto, Carlos; Esteves, Luciana S.; Costa, José Carlos
    Human-induced land-use changes have resulted in loss and degradation of intertidal environments worldwide. Saltmarsh ecosystem dynamics in Portugal are greatly influenced by historic uses and consequent habitat degradation. This study uses an original approach combining vegetation surveys and spatial analysis of historic maps and aerial photographs to assess the effects of land use changes on saltmarshes in two areas in the Algarve, southern Portugal. Historical maps from c. 1800 and aerial photographs from 1958 to 2010 were analyzed to map saltmarsh ecosystems and quantify land-use changes in the Alvor estuary and Arade River. Between c. 1800 and 2010 more than half of saltmarshes were lost due to...

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