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Effects of Elevated Carbon Dioxide on Soils in a Florida Scrub Oak Ecosystem

^a Environmental and Resource Sciences, College of Agriculture, Univ. of Nevada, Reno, NV 89512
^b Dep. of Biological Sciences, Northern Arizona Univ., Flagstaff, AZ 86011-5640
^c Plant Protection Service, P.O. Box 9102, 6700 HC, Wageningen, the Netherlands
^d Smithsonian Environmental Research Center, Edgewater, MD 21037

View larger version (29K): [in a new window]   Fig. 1. Leaching rates of NH+4, NO-3, NH+4 + NO-3, and orthophosphate in 1997, 1998, and 1999 as measured by resin lysimeters. (A = ambient CO2, E = elevated CO2)

View larger version (21K): [in a new window]   Fig. 2. Total C, total N, C to N ratio, and extractable P in homogenized buried bags retrieved after 1 yr (in 1997). *, **, and *** indicate significance at the 0.10, 0.05, and 0.01 probability levels for single factor analysis of variance (ANOVA), respectively

View larger version (22K): [in a new window]   Fig. 3. Soil pCO2 analyses from gas wells between April 1997 and January 2000