In 1968 the fresh vegetative type encompassed 5,260 knn'^, but by 1978 it hod been 

 reduced to 4,900 knn^ (6JB%). During the sanne time period, the saline vegetative type 

 increased from 3,768 km^ to 4,105 km^ (8.9%). Only slight changes in size were noted in 

 the brackish and intermediate types from 1968 to 1978; thie brackish type increased 96 

 km^ (1.8%) and the intermediate type decreased 73 km^ (2.6%). The brackish and 

 intermediate types are actually transitional zones between the saline and fresh types. As 

 a result of coastal alteration, salt water moved further inland during the 10-year 

 interval. This caused the saline vegetation type to expand in size and the transitional 

 zones (brackish and intermediate types) to retreat further inland with very little 

 modification in size. Consequently, the fresh vegetative type was reduced in size, and 

 the inland advancement of the saline vegetative type was mostly at the expense of the 

 fresh type. 



LITERATURE CITED 



Chabreck, R.H. 1970. Marsh zones and vegetative types in Louisiana coastal marshes. 

 Ph. D. Dissertation. Louisiana State Univ., Baton Rouge. I 13 pp. 



Chabreck, R.H. 1972. Vegetation, water and soil characteristics of the Louisiana 

 coastal region. La. Agric. Exp. Stn. Bull. 664. 72 pp. 



Chabreck, R.H., T. Joanen, and A.W. Palmisano. 1968. Vegetative type map of the 

 Louisiana coastal marshes. Louisiana Wildlife and Fisheries Commission, New Orleans. 



Chabreck, R.H., and G. Linscombe. 1978. Vegetative type map of the Louisiana coastal 

 marshes. Louisiana Department of Wildlife and Fisheries, New Orleans. 



Chabreck, R.H. and G. Linscombe. In press. Changes in vegetative types in Louisiana 

 coastal marshes over a 10 year period. Proc. La. Acad. Sci. 



Kinler, N.W., G. Linscombe, and R.H. Chabreck. 1981. Smooth beggartick, its 

 distribution, control and impact on nutria in coastal Louisiana. Worldwide Furbearer 

 Conference Proceedings, Frostburg State College, Frostburg, Md. 1:142-154. 



O'Neil, T. 1949. The muskrat in the Louisiana coastal marshes. Louisiana Department 

 of Wildlife and Fisheries, New Orleans. 159 pp. 



Palmisano, A.W. 1967. Ecology of Scirpus oineyi and Scirpus robustus in Louisiana 

 coastal marshes. M.S. Thesis. Louisiana State Univ., Baton Rouge. 145 pp. 



Penfound, W.T., and E.S. Hathaway. 1939. Plant communities in the marshlands of 

 southeastern Louisiana. Ecol. Monogr. 8:1-56. 



Russell, R.J. 1942. Flotant. Geogr. Rev. 32:74-98. 



Valentine, J.M. 1977. Plant succession after saw-grass mortality in southwestern 

 Louisiana. Proc. Annu. Conf. Southeast. Assoc. Game Fish Comm. 30:634-640. 



98 



