Whole canopy gas exchange among elite loblolly pine families subjected to drought stressThis article is part of a larger document. View the larger document here.
Future climate change simulations predict that the southeastern United States will experience hydrologic patterns similar to that currently found in the Western Gulf Region, meaning, that planted elite loblolly families may be subject to drier, hotter summers (Ruosteenoja et al. 2003, Field et al. 2007). Currently, there is little research on how these fast-growing loblolly families will perform under severe, summertime drought conditions. The summer of 2010 was extremely dry in northern Louisiana. From March to October precipitation totals were 46.3 cm (54%) below the 30 year average making this one of the driest summers on record (NOAA 2010). The objectives of this study were to determine how severe drought stress effected total tree leaf area, specific light saturated photosynthesis (ASat), and canopy level light saturated photosynthesis (ACan) among four fast-growing loblolly families.