Table 31. Correlation coefficients showing relationships of environmental and plant parameters. 1 





Sea oats survival 



Bitter panicum survival 



Variables 



Beaches 



Beaches 





Open 



1 Protected 1 Open-Protected 



Open 1 Protected 1 Open-Protected 



Correlation coefficients (r) 



Soil salinity at 6 inches 



-0.41 



-0.31 



-0.64 



0.69 



-0.36 



-0.40 



Total available carbohydrates 



-0.59 



-0.46 



-0.35 



-0.09 



0.42 



-0.57 



Precipitation 



0.30 



0.57 



0.29 



-0.17 



0.03 



-0.55 



Air temperature, x minimum 



0.04 



0.78 



0.28 



-0.79 



0.10 



-0.31 



Air temperature, x maximum 



-0.14 



0.63 



0.17 



-0.72 



0.22 



-0.35 



Air temperature, x 







0.24 







-0.39 



Soil temperature at 6 inches 



-0.16 



0.59 



0.15 



-0.76 



0.31 



-0.39 



Soil moisture at 6 inches 



-0.49 



-0.09 



0.07 



0.46 



0.66 



0.07 





Multiple correlation coefficients (R) 







Total available carbohydrates 



Soil moisture at 6 inches 



Precipitation 



Soil temperature at 6 inches 



0.59 

 0.76 

 0.86 

 0.95 













Air temperature, x minimum 

 Air temperature, x maximum 

 Total available carbohydrates 

 Soil salinity at 6 inches 





0.78 

 0.95 

 0.98 

 0.98 











Soil salinity at 6 inches 

 Precipitation 







0.64 

 0.72 









Air temperature, x minimum 

 Soil salinity at 6 inches 

 Soil temperature at 6 inches 

 Total available carbohydrates 









0.79 

 0.95 

 0.98 

 1.00 







Soil moisture at 6 inches 

 Soil salinity at 6 inches 

 Air temperature, x minimum 

 Air temperature, x maximum 











0.67 

 0.73 

 0.79 

 0.84 





Total available carbohydrates 

 Soil moisture at 6 inches 

 Air temperature, x maximum 

 Soil salinity at 6 inches 













0.57 

 0.74 

 0.83 

 0.91 



1. Measured in conjunction with survival of test species on open versus protected beach plantings on Padre Island 

 during 1973 and 1974 seasons. 



102 



