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Are neighboring trees in tune? Wood formation in Pinus pinaster
Vieira, Joana; Rossi, Sergio; Campelo, Filipe; Nabais, CristinaNeighboring trees growing under identical environmental conditions can exhibit different dynamics and periods of growth. Despite the recent advances in cambial biology, the exogenous and endogenous factors generating asynchronous xylem growths still remain undetermined. This study investigated timings and duration of xylem formation in maritime pine (Pinus pinaster Ait.) from an even-aged plantation in Portugal...
Seasonal and daily cycles of stem radial variation of Pinus pinaster in a droug...
Vieira, Joana; Rossi, Sergio; Campelo, Filipe; Freitas, H.; Nabais, C.High resolution measurements of stem diameter variation can provide valuable information on the growth process as well as the tree water status. This study investigates the hourly variations in stem radial increment of maritime pine growing on the west coast of Portugal, under a Mediterranean climate with a pronounced summer drought. We tested the hypotheses that (1) stem radius variation in maritime pine has a...
Subsidy or stress ? Tree structure and growth in wetland forests along a hydrol...
Rodriguez-Gonzalez, Patricia Maria; Stella, John Christopher; Campelo, Filipe; Ferreira, Maria Teresa; Albuquerque, AntónioIn forested wetlands, hydrology exerts complex and sometimes compensatory influences on tree growth. This is particularly true in semi-arid ecosystems, where water can be both a limiting resource and a stressor. To better understand these relationships, we studied hydrologic and edaphic controls on the density, growth, tree architecture and overall productivity of forested wetlands dominated by the tree species...
Análise dos custos segurados e não segurados dos acidentes laborais numa indúst...
Campelo, FilipeA aplicação de um conceito económico para medir o valor da vida humana é um exercício que colide com as nossas emoções. A consideração da dimensão económica dos acidentes de trabalho leva-nos a abordagens simultaneamente precisas e controversas. Os acidentes afectam a vida das pessoas e representam um custo significativo, quer para as empresas, quer para a Sociedade. Dado tudo começar no seio das empresas, é im...
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