Consulta: creatorFacets:"Bucci,Sandra J."
Registros recuperados: 2
Data/hora: 03/06/2024 11:16:42

Plant- and stand-level variation in biophysical and physiological traits along tree density gradients in the Cerrado
Provedor de dados: Brazilian Journal of Plant Physiology
Autores: Scholz,Fabian G.; Bucci,Sandra J.; Goldstein,Guillermo; Meinzer,Frederick C.; Franco,Augusto C.; Salazar,Ana.
The objective of this study was to characterize and understand morphological and physiological variation in traits related to water economy, at the plant and stand level, along a gradient of tree density in a Neotropical savanna (Cerrado). Cerrado plots subjected to long-term fertilization and gallery forests were also included in the analysis to expand the axes of ecosystem variation. Consistent changes in stand level biophysical traits observed along the gradient of increasing tree density included a decrease in weighted-average wood density, and increases in leaf surface area per plant, leaf specific hydraulic conductivity, specific leaf area and stomatal conductance. A conceptual model of biophysical, morphological and physiological trait interactions...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gallery forest; Hydraulic architecture; Nutrients; Savannas; Specific leaf area; Wood density.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202008000300006

Water relations and hydraulic architecture in Cerrado trees: adjustments to seasonal changes in water availability and evaporative demand
Provedor de dados: Brazilian Journal of Plant Physiology
Autores: Bucci,Sandra J.; Scholz,Fabian G.; Goldstein,Guillermo; Meinzer,Frederick C.; Franco,Augusto C.; Zhang,Yongjiang; Hao,Guang-You.
We determined adjustments in physiology and morphology that allow Neotropical savanna trees from central Brazil (Cerrado) to avoid water deficits and to maintain a nearly constant internal water balance despite seasonal changes in precipitation and air saturation deficit (D). Precipitation in the study area is highly seasonal with about five nearly rainless months during which D is two fold higher compared to wet season values. As a consequence of the seasonal fluctuations in rainfall and D, soil water potential changes substantially in the upper 100 cm of soil, but remains nearly constant below 2 m depth. Hydraulic architecture and water relations traits of Cerrado trees adjusted during the dry season to prevent increasing water deficits and insure...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Isohydric behavior; Hydraulic conductivity; Soil water potential and water content; Savanna; Stomatal conductance; Transpiration.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202008000300007