Encontrados 15 documentos, a visualizar página 1 de 2
Geographical, temporal and environmental determinants of bryophyte species rich...
Aranda, Silvia C.; Gabriel, Rosalina; Borges, Paulo A. V.; Santos, Ana M. C.; Azevedo, Eduardo B.; Patiño, Jairo; Hortal, JoaquÃn; Lobo, Jorge M.Copyright: © 2014 Aranda et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. ; Species richness on oceanic islands has been related to a series of ecological factors including island size and isolation (i.e. the Equilibri...
HERA - Environmental Risk Assessment of a contaminated estuarine environment: a...
Martinho, Ana Paula; Rodrigo, Ana; Vicente, Ana; Machado, Ausenda; Dias, Carlos Matias; Guiomar, Carla Sofia; Gonçalves, Cátia; Paixão, EleonoraSado River estuary is located in the west coast of Portugal. Previous environmental studies identified industrial contamination, non-point anthropogenic sources and contamination coming from the river, all promoting accumulation of polluted sediments with known impacts on the ecological system. Surrounding human populations have intense economic fishery activities. Together with agriculture, estuary fishing pro...
The provisional status of arthropod inventories in the Macaronesian islands
Lobo, Jorge M.; Borges, Paulo A. V."[...]. We examined the available data on the most hyper-diverse group of terrestrial animals (the arthropods) with the aim to assess the general reliability of these Macaronesian inventories. First, we describe the main differences between archipelagos in the year of species description. These calculations allow us to compare the temporal pattern of the taxonomic process in the four archipelagos depending on t...
Assessing the completeness of bryophyte inventories: an oceanic island as a cas...
Aranda, Silvia C.; Gabriel, Rosalina; Borges, Paulo A. V.; Lobo, Jorge M.Copyright © Springer Science+Business Media B.V. 2010. ; How useful, complete or unbiased are comprehensive databases in order to provide reliable estimations of diversity? Using compiled data from bryophytes in Terceira Island (Azores), we specifically aim (1) to describe the register of species over time, (2) to assess the inventory completeness, i.e., the ratio between the observed and the maximum expected ...
Histological biomarkers in liver and gills of juvenile Solea senegalensis exposed
Costa, Pedro M.; Diniz, Mário S.; Caeiro, Sandra; Lobo, Jorge; Martins, Marta; Ferreira, Ana M.; Caetano, Miguel; Vale, Carlos; DelValls, ÁngelYoung juvenile Solea senegalensis were exposed to three sediments with distinct contamination profiles collected from a Portuguese estuary subjected to anthropogenic sources of contamination (the Sado estuary, western Portugal). Sedimentswere surveyed formetals (cadmium, chromium, copper, nickel, lead and zinc), ametalloid (arsenic) and organic contaminants (polycyclic aromatic hydrocarbons, polychlorinated bip...
Biochemical endpoints on juvenile Solea senegalensis exposed
Costa, Pedro M.; Caeiro, Sandra; Diniz, Mário S.; Lobo, Jorge; Martins, Marta; Ferreira, Ana M.; Caetano, Miguel; Vale, Carlos; DelValls, ÁngelJuvenile Solea senegalensis were exposed to fresh sediments from three stations of the Sado estuary (Portugal) in 28-day laboratory assays. Sediments revealed distinct levels of total organic matter, fine fraction, redox potential, trace elements (arsenic, cadmium, chromium, copper, nickel, lead and zinc) and organic contaminants (polycyclic aromatic hydrocarbons, polychlorinated biphenyls and a pesticide: dich...
Coefficient shifts in geographical ecology: an empirical evaluation of spatial ...
Bini, L. Mauricio; Diniz-Filho, J. Alexandre F.; Rangel, Thiago F. L. V. B.; Akre, Thomas S. B.; Albaladejo, Rafael G.; Albuquerque, Fabio S.Copyright © 2009 The Authors. Copyright © ECOGRAPHY 2009. ; A major focus of geographical ecology and macro ecology is to understand the causes of spatially structured ecological patterns. However, achieving this understanding can be complicated when using multiple regressions, because the relative importance of explanatory variables, as measured by regression coefficients, can shift depending on whether spati...
A spatial scale assessment of habitat effects on arthropod communities of an oc...
Cardoso, Pedro; Aranda, Silvia C.; Lobo, Jorge M.; Dinis, Francisco; Gaspar, Clara; Borges, Paulo A. V.Copyright © 2009 Elsevier Masson SAS. All rights reserved. ; Most habitats in the Azores have undergone substantial land-use changes and anthropogenic disturbance during the last six centuries. In this study we assessed how the richness, abundance and composition of arthropod communities change with: (1) habitat type and (2) the surrounding land-use at different spatial scales. The research was conducted in Te...
Using predictive models of species distribution to validate biodiversity data: ...
Jiménez-Valverde, Alberto; Hortal, Joaquín; Lobo, Jorge M.; Borges, Paulo A. V.; Abreu, Cristina; Aguiar, António F.; Azevedo, Eduardo B.Os modelos preditivos de distribuição de espécies são uma importante ferramenta para lidar com a falta de informação biogeográfica existente para a maior parte dos taxa. Com esta técnica, estabelece -se uma relação entre a variável dependente (presença/ausência de uma espécie) e um conjunto de variáveis potencialmente preditoras, e é criado um mapa com a probabilidade de presença da espécie para uma determinada...
Invasibility and species richness of island endemic arthropods: a general model...
Borges, Paulo A. V.; Lobo, Jorge M.; Azevedo, Eduardo B.; Gaspar, Clara; Melo, Catarina; Nunes, Luis V.Copyright © 2005 Blackwell Publishing. ; This paper has two objectives. First, we examine how a variety of biotic, abiotic and anthropogenic factors influence the endemic and introduced arthropod richness on an oceanic island. Second, we look at the relationship between the endemic and introduced arthropod richness, to ask whether areas with high levels of endemic species richness deter invasions.
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