Ford, C.R. and J.R. Brooks. 2003. Hydrological and climatic responses of Pinus elliottii var. densa in mesic pine flatwoods, Florida, USA. Ann. For. Sci. 60:385-392. WED-00-071
Pinus elliottii Engelm. var. densa Little & Dorman is the only native sub-tropical pine in the US and is now restricted to an estimated 4.5% of its original area. To understand how this species might respond to changing environments, we examine the relationship between two hydrologic variables and growth of three stands of P. elliottii var. densa occurring along a hydrologic gradient using tree-ring records. The two variables were a short-term indicator of water status, precipitation minus potential evapotranspiration (P-PET), and a long-term indicator of water status, runoff (R). Growth at all sites was positively correlated to current growing season P-PET and R, and strongly, negatively correlated with previous winter R. The positive correlation with spring R was greater in the site with the deepest water table than in Sit shallower water tables. We discuss the potential for root dynamics to explain the relationships between growth and R.