Table 4. Percent survival of transplants in block XVII, August 1976. 



SPECIES 



Area 



Smooth 

 Cordgrass 



Saltgrass 



Needlegrass 

 Rush 



Marshhay 

 Cordgrass 



Gulf 

 Cordgrass 



Unfenced 

 Fenced 



40.5 

 56.7 



57.9 

 67.6 



0.0 

 5.3 



76.3 

 71.9 



49.1 

 61.4 



Mean 



50.2 



63.7 



3.2 



73.7 



59.5 



In April 1977, survival of each species was recorded by five-row 

 increments. Percent survival in the five rows at the highest elevation 

 was low for all species (Table 5). However, survival of marshhay 

 cordgrass was less than 50 percent at the higher elevation and exceeded 

 90 percent at the lower elevations. Survival of gulf cordgrass was less 

 than marshhay cordgrass at the higher elevations. 



During the June 1977 evaluation a few plants were recorded alive 

 that appeared dead in April (Table 5). Thus, survival was generally 

 higher in June than April. Seed heads were present on a number of 

 marshhay cordgrass and gulf cordgrass plants. 



Elevations generally decreased slightly over time at the upper edge 

 of the block (Fig. 6). An exception was three plots on the western side 

 where a slight increase occurred. This increase may have resulted from 

 soil deposited at the edge of the block during site preparation. 

 Erosion apparently occurred at the other locations. However, elevation 

 generally decreased less than 3 centimeters. The largest decrease was 6.: 

 centimeters. This erosion may reflect runoff from rain or the effects of 

 storm tides with wave height exceeding the wave-stilling device. 



In the middle zone a slight buildup of approximately 3 to 5 centi- 

 meters occurred on the east and west sides. However, a decrease of 3.1 

 centimeters was measured at one location. Near the wave-stilling device 

 deposition ranged from 5.8 to 14.7 centimeters in a year. 



Inundation averaged less than 17 hours daily on any part of block 

 XVII (Fig. 7). From June-1976 to June 1977, MHW was 27.5 centimeters. 

 This represented a 15.3-centimeter decrease in MHW from 1976 to 1977. 



