Table 27. Multiple correlation coefficients (R) and coefficients of determination (R ) relating 

 environmental and plant parameters to survival of test species on Padre Island. 



Sea oats 



North Padre 



South Padre 



Season 



Variables included 



Variables used 



R 



R 2 



Variables used 



R 



R 2 



1970, 71 



Soil moisture and salinity 



(x) 2 



-0.79 



0.62 



(x) 2 



0.87 



0.75 







3 



0.87 



0.76 



4 



0.99 



0.98 







5 



0.92 



0.84 



5 



1.00 



1.00 





All variables 



2 



-0.79 



0.62 



2 



0.87 



0.75 







5 



0.87 



0.76 



4 



0.99 



0.98 







12 



0.93 



0.86 



6 



1.00 



1.00 



1971,72 



Soil moisture and salinity 



(x) 3 



0.55 



0.30 



(x) 3 



-0.68 



0.47 







4 



0.64 



0.41 



4 



0.95 



0.90 







5 



0.71 



0.50 



2 



0.95 



0.91 







2 



0.76 



0.57 



5 



0.95 



0.91 





All variables 



3 



0.55 



0.30 



12 



-0.88 



0.78 







4 



0.64 



0.41 



3 



0.98 



0.96 







5 



0.71 



0.50 



10 



1.00 



0.99 







7 



0.98 



0.96 



4 



1.00 



1.00 



1972, 73 



Soil moisture and salinity 



(x) 3 



0.67 



0.46 



(x) 4 



0.74 



0.55 







5 



0.70 



0.49 



5 



0.77 



0.59 







2 



0.74 



0.54 



3 



0.79 



0.62 







4 



0.75 



0.57 



2 



0.81 



0.65 





All variables 



3 



0.67 



0.45 



4 



0.74 



0.55 







5 



0.70 



0.49 



7 



0.82 



0.67 







11 



0.74 



0.54 



5 



0.87 



0.76 







10 



0.89 



0.79 



12 



0.90 



0.82 



1973, 74 



Soil moisture and salinity 



(x) 5 



0.42 



0.18 



(x)4 



0.95 



0.90 







4 



0.46 



0.21 



2 



0.97 



0.94 







2 



0.54 



0.29 



5 

 3 

 4 



0.98 

 0.99 

 0.95 



0.96 

 0.98 

 0.90 





All variables 



5 



0.42 



0.18 







11 



0.51 



0.26 



7 



0.99 



0.97 







7 



0.78 



0.61 



10 



1.00 



0.99 







6 



0.91 



0.83 



12 



1.00 



1.00 



1. Variable numbers correspond to those in Table 26. 



94 



