Encontrados 12 documentos, a visualizar página 1 de 2
Disposal of dredged sediments in tropical soils: ecotoxicological effects on ea...
Cesar, Ricardo; Natal-da-Luz, Tiago; Sousa, José Paulo; Colonese, Juan; Bidonne, Edison; Castilhos, Zuleica; Egler, Silvia; Polivanov, HelenaThe upper limit concentrations of metals established by international legislations for dredged sediment disposal and soil quality do not take into consideration the properties of tropical soils (generally submitted to more intense weathering processes) on metal availability and ecotoxicity. Aiming to perform an evaluation on the suitability of these threshold values in tropical regions, the ecotoxicity of metal...
Sistemas de gestão do solo em olivais de Trás-os-Montes: efeitos nas propriedad...
Fonseca, Felícia; Queirós, Anabela; Buch, Andressa; Carvalho, Filipe Chichorro de; Sousa, José Paulo; Santos, Sónia A.P.A maioria dos olivais de Trás-os-Montes ocupam áreas de risco de erosão potencial elevado a muito elevado, pelo que é fundamental aplicar técnicas de conservação do solo que evitem a perda deste recurso. A sensibilização para estas e outras questões de ordem agro-ambiental, bem como os efeitos na produção dos olivais têm vindo a incrementar a utilização de práticas culturais de controlo das infestantes alternat...
Variação espacial de propriedades físicas e químicas do solo em olivais de Trás...
Fonseca, Felícia; Queirós, Anabela; Buch, Andressa; Carvalho, Filipe Chichorro de; Sousa, José Paulo; Santos, Sónia A.P.A introdução de novos sistemas de gestão da vegetação herbácea em olivais de Trás-os-Montes tem realçado o interesse em conhecer os efeitos produzidos na variabilidade espacial das propriedades do solo. Com o presente trabalho pretende-se avaliar o efeito de diferentes sistemas de gestão do coberto vegetal herbáceo em olivais na distribuição espacial de propriedades físicas e químicas do solo. O estudo decorreu...
State of the science and the way forward for the ecotoxicological assessment of...
Kuperman,Roman G.; Checkai,Ronald T.; Garcia,Marcos Vinicius Bastos; Römbke,Jörg; Stephenson,Gladys L.; Sousa,José PauloOver the past two decades, soil ecotoxicologists have made strides in utilizing the basic concepts and advancements in soil zoology and ecology. They have applied the existing tools, and developed new ones to investigate how chemical contamination can affect soil ecosystems, including the degradation or destruction of soil quality and habitats or the diminishment of belowground biodiversity. Soil ecotoxicologis...
Colêmbolos (Hexapoda: Collembola) como bioindicadores de qualidade do solo em á...
Baretta,Dilmar; Ferreira,Cristina Seabra; Sousa,José Paulo; Cardoso,Elke Jurandy Bran NogueiraNão existem informações sobre a diversidade de colêmbolos associados às florestas com Araucaria angustifolia (Bert.) O. Kuntze no Brasil. Este estudo teve o objetivo de avaliar o potencial da diversidade de famílias de colêmbolos como bioindicadores da qualidade do solo e para separar diferentes áreas com araucária, utilizando atributos químicos e microbiológicos do solo como variáveis explicativas. O estudo fo...
Diversity patterns of ground-beetles (Coleoptera: Carabidae) along a gradient o...
Silva, Pedro Martins da; Aguiar, Carlos A. S.; Niemelä, Jari; Sousa, José Paulo; Serrano, Artur R. M.Ground-beetles were used to monitor biodiversity along a gradient of land-use disturbance, from old-growth cork-oak woodland to a monoculture, in a typical Mediterranean landscape. The work also included an exotic forest in the second year. During this study, a total of 11Â 294 individuals of carabids from 101 different species were sampled (2001: NÂ =Â 4776, SÂ =Â 80; 2002: NÂ =Â 6518, SÂ =Â 77). Agriculture u...
Cork-oak woodlands as key-habitats for biodiversity conservation in Mediterrane...
Silva, Pedro Martins da; Aguiar, Carlos A. S.; Niemela, Jari; Sousa, José Paulo; Serrano, Artur R. M.Land-use intensification in Mediterranean agro-forest systems became a pressure on biodiversity, concerning particularly the woodland sensitive species. In 2001, the effects of a land-use gradient from old-growth cork-oak forest to a homogeneous agricultural area were assessed using rove beetles as indicators in a Mediterranean landscape. The aim was to find which species were negatively affected by land-use in...
Repeatability and method-dependent variation of blood parameters in wild-caught...
Norte, Ana Cláudia; Sheldon, Ben; Sousa, José Paulo; Ramos, Jaime AlbinoWhen interpreting responses to experimental manipulations or particular environmental cues, it is necessary to have previous knowledge about the natural variation of the response traits. We studied how nine blood parameters, including four enzymatic activities, varied with time in wild Great Tits by assessing their repeatabilities over periods of 45 days, in the same season (Spring or Autumn/Winter), in the sam...
Changes in Collembola richness and diversity along a gradient of land-use inten...
Sousa, José Paulo; Bolger, Thomas; Gama, Maria Manuela da; Lukkari, Tuomas; Ponge, Jean-François; Simón, Carlos; Traser, Georgy; Vanbergen, Adam J.Changes in Collembola richness and diversity along a land-use intensity gradient were studied in eight European countries (Portugal, Spain, France, Switzerland, Hungary, UK, Ireland and Finland). In each country a set of six 1 km2 land-use units (LUUs) were selected forming a gradient ranging from natural forest to agricultural dominated landscapes, passing through mixed-use ones. In addition to data on Collemb...
Effects of land-use on Collembola diversity patterns in a Mediterranean landscape
Sousa, José Paulo; Gama, Maria Manuela da; Pinto, Cristina; Keating, António; Calhôa, Filipa; Lemos, Marco; Castro, Catarina; Luz, Tiago; Leitão, PedroCollembola communities were sampled along a gradient of soil-use intensification in a typical Mediterranen landscape dominated by cork-oak. This gradient ranged from a land-use unit (LUU1) dominated by closed oak forest with minimum intervention to an unit entirely composed of a monoculture crop submitted to frequent anthropogenic disturbances (LUU6), passing through LUUs with managed woodland (LLU2) or dominat...
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