Submarine canyons are known to be important conduits that trap, accumulate and deliver both natural and anthropogenic sediments from the shelf to the deep sea. Ten multi-cores from the Cascais Canyon and from the neighbour slopes (off Estremadura and Sines) were dated by 21Opb methodologies and analyzed for texture, major and trace metals to evaluate the role of submarine canyons in the transport of anthropo...
Temporal variations in lead concentrations and stable lead isotopic ratios in two sediment cores from the Cascais Canyon shows changes in sources of Pb during the last two centuries. The increase of total Pb contents wIth the evolution of Pb ratio recorded in both cores reveals the Increase of Pb from industrial sources. Nevertheless, this increase is lower in deeper core location (252-32) due to dilution an...
A incompatibilidade intraespecífica em oliveira é geralmente aceite como a incapacidade do pólen germinar sobre o próprio estigma ou do crescimento do tubo polínico poder ser detido no seu percurso até ao ovário. Neste trabalho experimental pretendeu-se verificar a compatibilidade do pólen através do acompanhamento da germinação in vivo dos grãos de pólen colhidos de ramos frutíferos em autopolinização e em pol...
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