TABLES-Continued 



Page 



10 Composition of vegetation at "Oak Grove," Permian Tank Area, Padre Island 



National Seashore, 13 September 1973 45 



1 1 Experimental planting sites on Padre Island 46 



12 Exotic plants tested for growth and vigor on north Padre Island 60 



13 Survival of monthly plantings of four test species on Padre Island 61 



14 Percent survival of nursery versus wild sea oats 74 



15 Percent survival of bitter panicum and sea oats transplants after storage 



in freshwater 75 



16 Transplant survival of monthly planting of sea oats and bitter panicum 76 



1 7 Percent soil moisture at the surface and at 6 inches from three locations 



on artificial dunes 77 



18 Percent soil moisture by topographic position on Padre Island 79 



19 Soil salinity at the surface and at 6 inches from three locations on artificial 



dunes on Padre Island 82 



20 Soil salinity on Padre Island by topographic position 83 



21 Response of sea oats transplants to salinity level under greenhouse conditions . . 85 



22 Response of bitter panicum transplants to salinity level under greenhouse 



conditions 85 



23 Response of shoredune panicum transplants to salinity level under greenhouse 



conditions 86 



24 Percent total carbohydrates available for native test species on Padre Island ... 88 



25 Survival of bitter panicum transplants with different depths of sand 



accumulation on Padre Island 90 



26 Environmental and plant parameters measured in conjunction with monthly 



plantings of test species on Padre Island 92 



27 Multiple correlation coefficients (R) and coefficients of determination (R 2 ) 



relating environmental and plant parameters to survival of test species on 



Padre Island 94 



28 Correlation coefficients (r) showing relationship of environmental and plant 



parameters measured in conjunction with survival of test species on 



Padre Island 98 



29 Correlation coefficients showing relationship of environmental and plant 



parameters to survival of test species 99 



