2008 Joint Annual Meeting (5-9 Oct. 2008): Differences in Tolerance of Bald Cypress and Pond Apple to Salinity and Flooding.
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767-6 Differences in Tolerance of Bald Cypress and Pond Apple to Salinity and Flooding.



Wednesday, 8 October 2008
George R. Brown Convention Center, Exhibit Hall E
Guodong Liu1, Yuncong li1, Bruce Shaffer1, Richard Roberts2, Yongshan Wan3 and Marion Hedgepeth4, (1)Tropical Research and Education Center, University of Florida, 18905 SW 280th Street, Homestead, FL 33031
(2)Florida Park Service, Florida Dept. of Environmental Protection, District 5, P.O. Box 1246, Hobe South, FL 33455
(3)Ecology Division, South Florida Water Management District, 3301 Gun Club Road, W. Palm Beach, FL 33406
(4)Ecology Division, 4South Florida Water Management District, 3301 Gun Club Road, W. Palm Beach, FL 33406
Bald cypress and pond apple are both key species in the floodplain of the Loxahatchee Rover Watershed in southeast Florida. They are both suffering from salinity and flooding stresses. Bald cypress is retreating but pond apple is not. The tolerances of the two species to salinity and flooding were studied at 3, 9, 15, and 20 parts per thousand (ppt) with pot experiments in 185 X 152 X 23 cm tubs in screen house. The results showed that mortality of bald cypress was 6.7, 60.0, 100, and 100% at 3, 9, 15, and 20 ppt, respectively but that of pond apple was 0 at 3 through 20 ppt. Their biomass, transpiration rates, leave wax content would also explain the difference in the tolerance of the two species to flooding and salinity stresses.
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