The history of burning on the transect is unknown. During the 
late autumn of 1955, the saltmeadow cordgrass trail through the reed 
segment and portions of the reed segment were burned. 
Salinities varied from 3.8 to 49.5 percent of sea water. 
transect D was located on Lacassine National Wildlife Refuge 
in Cameron Parish. The transect started at Lacassine Bayou and ex- 
tended 1,600 feet into a dense stand of sawgrass. The sawgrass had 
been unburned for a number of years, and was a typically mature stand 
of clumps with leaves spreading out from the widely spaced bases to 
occupy the area completely. It was essentially a fresh water marsh, 
with salinities varying from 0.3 to 2.2 percent of sea salinity. 
Transect E was also located on Lacassine Refuge about 1.5 miles 
north of Transect D. It was 500 feet long passing through the rem- 
nants of a southern bulrush stand into a sparse growth of sawgrass. 
Salinities of water at the marsh surface varied as for Transect D. 
RESULTS 
Transects 
The results described are intended to apply only to the time 
and places of this study. Vegetative measurements for September- 
October 1954, July 1955, and August 1956, are expressed in one or more 
of three measurements: 
1. Percentage of nonvegetated ground along the transects was 
calculated from measurements of open spaces and vegetative 
