114 documents found, page 1 of 12
Em Roma sê Romano? Sobre-qualificação na emigração Portuguesa
Candeias, P.; Marques, J. C.; Peixoto, J.A integração de emigrantes no mercado de trabalho tem efeitos na trajetória migratória da própria pessoa e na sua interação com a sociedade de acolhimento. É frequentemente trespassada por dificuldades de ajustamento do capital humano e das competências profissionais às necessidades do mercado de trabalho. A migração qualificada ilustra com particular acuidade a heterogeneidade destes processos. Com efeito, a e...
Humboldt's enigma viewed through the lens of ecosystem theory. Explanation by s...
Nielsen, S. N.; Müller, F.; Marques, J. C.The observation that mountain regions generally display higher diversity than tropical regions has recently been presented as a puzzle or “enigma”, since it seems to contradict the normal belief that the highest diversity on Earth occurs in the rain forest ecosystems around the equator. The observation seems to be well supported by data gathered for several animal and plant communities, and thus deserves furthe...
Entre a coexistência e a convivência: Imigração portuguesa e estratégias de med...
Marques, J. C.; Vieira, A.; Vieira, R.
Portugal e Espanha, países para regressar: Uma análise comparada de políticas d...
Pinho, F.; Marques, J. C.; Gois, P.É evidente, internacionalmente, a escassez de teorias políticas focadas na emigração, comparando com a literatura sobre integração imigrante nas sociedades recetoras. Com a perspetiva transnacional, quando se notou que os emigrantes mantinham ligações com os seus países de origem, começou a expandir-se a análise à forma como o Estado poderia influenciar vínculos entre emigrantes e os seus países de origem e, me...
Nova emigração portuguesa: perfis, integração e expetativas
Peixoto, J.; Oliveira, I.; Azevedo, J.; Marques, J. C.; Gois, P.; Malheiros, J.; Madeira, P.; Candeias, P.; Ferreira, B.; Schiltz, A.; Ferro, A.Este texto apresenta os principais resultados de um projeto de investigação, intitulado Regresso ao Futuro: a Nova Emigração e a Relação com a Sociedade Portuguesa (REMIGR), financiado pela FCT, que decorreu entre 2013 e 2015. O principal objetivo do projeto foi compreender a dimensão e características dos novos movimentos de emigração portuguesa, destacando, em especial, as relações que os novos emigrantes man...
Ecotoxicity of the lipid-lowering drug bezafibrate on the bioenergetics and lip...
Duarte, Bernardo; Prata, Diogo; Matos, Ana Rita; Cabrita, Maria Teresa; Caçador, Isabel; Marques, J. C.; Cabral, Henrique; Reis Santos, PatrickPharmaceutical residues impose a new and emerging threat to the marine environment and its biota. In most countries, ecotoxicity tests are not required for all pharmaceutical residues classes and, even when mandatory, these tests are not performed using marine primary producers such as diatoms. These microalgae are among the most abundant class of primary producers in the marine realm and key players in the mar...
Functional and ecophysiological traits of Halimione portulacoides and Sarcocorn...
Duarte, Bernardo; Silva, Helena; Dias, João Miguel; Sleimi, Noomene; Marques, J. C.; Caçador, IsabelThe present paper aims to discuss the functional and ecophysiological traits of two abundant succulent halophytes in Mediterranean salt marsh systems, considering two ecotypes differing on their tidal exposure. In Halimione portulacoides the higher root/shoot (R/S) biomass ratio verified in low inundation frequency (LF) marshes, as compared with that in high inundation frequency (HF), indicates an optimal parti...
Phytoplankton community-level bio-optical assessment in a naturally mercury con...
Duarte, Bernardo; Cabrita, Maria Teresa; Vidal, Tânia; Pereira, Joana Luísa; Pacheco, Mário; Pereira, Patrícia; Canário, João; Gonçalves, Fernando J.M.Mercury naturally contaminated environments, like Deception Island (Antarctica), are field labs to study the physiological consequences of chronic Hg-exposure at the community level. Deception Island volcanic vents lead to a continuous chronic exposure of the phytoplanktonic communities to potentially toxic Hg concentrations. Comparing Hg-contaminated areas (Fumarolas Bay - FB, Gabriel de Castilla station - GdC...
Halophyte fatty acids as biomarkers of anthropogenic-driven contamination in Me...
Duarte, Bernardo; Carreiras, João; Pérez-Romero, Jesús Alberto; Mateos-Naranjo, Enrique; Redondo-Gómez, Susana; Matos, Ana Rita; Marques, J. C.Estuarine environments are extremely affected by anthropogenic-driven contamination, namely heavy metals. In the recent years, several organisms have been studied to be used as sentinel species providing a wide range of biomarkers for estuarine contamination. Only recently non-traditional biomarkers, such as fatty acids, were included in animal ecotoxicology and impact assessment studies. Nevertheless, there is...
Revisiting the outwelling hypothesis: Modelling salt marsh detrital metal expor...
Duarte, Bernardo; Vaz, N.; Valentim, J.M.; Dias, J.M.; Silva, H.; Marques, J. C.; Sleimi, N.; Caçador, IsabelThe Tagus estuary is a mesotidal estuary located on the Western Portuguese coast, and is characterized by large areas of saltmarshes (17.24 km2) and tidal flats distributed along the margins. Halophyte vegetation in this system concentrates heavy metals during the growing season and subsequently releases these metals to the environment following senescence. Although there currently there are no metal discharges...