Increased dominance by Acer rubrum and the decline of the Quercus-Carya climax in the North Carolina Piedmont by
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Temporal variation in species recruitment and dendroecology of an old-growth white oak forest in the Virginia Piedmont, USA
The composition and temporal variation in species recruitment were examined in relation to annual dendrochronological data to determine the historical development and successional history of an old-growth mixed-oak (Quercus) forest in northern Virginia, USA. A ridge site in the upland Piedmont, along the Potomac River, was used to survey the old-growth forest, which is dominated by Quercus alba...
متن کاملFrequency of sprout-origin trees in pre-European settlement forests of the southern Appalachian Mountains
We hypothesized that tree form, recorded in historical public land surveys, would provide a valuable proxy record of regeneration patterns during early-European settlement of North America's eastern deciduous forest. To test this hypothesis, we tallied stem form fromwitness trees used in land survey records in the southern Appalachian Mountains from 13 counties spanning four physiographic provi...
متن کاملUsing witness trees to assess forest change in southeastern Ohio
In 1787, the U.S. Congress authorized the sale of the “Ohio Company Purchase”, ca. 5000 km2 in Appalachian Ohio. The land was surveyed using a township and range system shortly thereafter. Data on >5600 witness trees were transcribed from the survey records, and witness tree locations were plotted on a digital map. This information was used to evaluate presettlement forest composition and struc...
متن کاملEstimates of net photosynthetic parameters for twelve tree species in mature forests of the southern Appalachians.
Leaf gas exchange, temperature, and incident radiation were measured in situ for 20 mature trees of 12 deciduous species spanning a range of heights from 7.9 to 30.1 m and growing in the southern Appalachian Mountains. Air temperature, water vapor pressure, total radiation, photosynthetically active radiation, and carbon dioxide concentration were also measured. Estimated mean, light-saturated ...
متن کاملStomatal acclimation to vapour pressure deficit doubles transpiration of small tree seedlings with warming.
Future climate change is expected to increase temperature (T) and atmospheric vapour pressure deficit (VPD) in many regions, but the effect of persistent warming on plant stomatal behaviour is highly uncertain. We investigated the effect of experimental warming of 1.9-5.1 °C and increased VPD of 0.5-1.3 kPa on transpiration and stomatal conductance (gs ) of tree seedlings in the temperate fores...
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