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Showing 1 to 7 of 7 for “"xylem pressure"”.
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Plant water relations along a rainfall gradient, between the succulent Karoo and Mesic Mountain Fynbos, in the Cedarberg Mountains, near Clanwilliam, South Africa
… are hypothesized to be the primary selective pressures. In Australia and South Africa low soil nutrients are thought to be important, as they are in defining the structurally similar heathlands found with a range of climatic types. The fynbos vegetation in an area with a mediterranean-type …
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An alternative hypothesis for explaining anomalies in the fine scale distribution patterns of Colophospermum mopane : Are shrub and tree forms genetically distinct ?
… of molecular variance (AMOV A). Soil profile and xylem pressure potential data also did not explain the distribution of growth forms. A principle component analysis and a discriminant analysis of five leaf and branching characters identified a significant difference in the shape of shrub and tree …
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Aspects of coastal fynbos phenology
… first paper deals with the responses of the stem xylem pressure potential of two species to seasonal moisture changes in three soils. The results show that L. parile experienced little or no water stress throughout the investigation. The decreasing spring-summer potentials measured in T. punctatus …
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An investigation into using stable water isotopes to determine the dependency of vegetation on groundwater at Cape Point Nature Reserve
… and which were rain-fed. We also sampled xylem water from five species, namely Leucadendron laureolum and Metalasia muricata (both of which grew on both dry and wetland areas), Mimetes hirtus (wetland only), Erica labialis (dry area only), and Erica multumbellifera (wet area orily). Our …
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Water sourcing by riparian tree species in ephemaral rivers
… growth and development needs all place growing pressure on these water-limited ecosystems. Careful catchment management is essential to meet human water needs without jeopardising the ecosystems. This is easier said than done however, as ephemeral river ecology and functioning are hardly …
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Top-down or bottom-up?: Impacts of giraffe browse and water abstraction on two keystone tree species of the Kgalagadi Transfrontier Park
… area, leaf δ¹³C values, canopy death and midday xylem pressure potentials) both upstream and downstream of active boreholes used for two tourist camps. One camp, Nossob, in the Nossob River is abstracting at a high rate while the other camp, Urikaruus, in the Auob River is abstracting at a lower …
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Untersuchungen zum Mechanismus des Wassertransportes in Höheren Pflanzen mit Hilfe der Druckmeßsonden- und NMR-Bildgebungstechnik
… der Korrelation von Flußgeschwindigkeiten und Xylemdruck in den Wasserleitungsbahnen gut gewässerter und trockengestreßter Pflanzen. Der dritte Teil befasste sich mit der Wiederbefüllung von kavitierten oder leeren Xylemgefäßen anhand der Auferstehungspflanze Myrothamnus flabellifolia.