Table 23. Habitat areas in hydrologic unit VII, Vermilion. 



Habitat 



No. Description 



Area (ha) 



1955 1978 

 (2.47 acres/ha) 



Change 

 in area 

 (1978-1955) 

 (ha) 



1 Agriculture 



2 Beach and dune 



3 Bottomland hardwoods 



4 Brackish marsh 



5 Canals 



6 Cypress-tupelo 



7 Fresh aquatic bed 



8 Fresh marsh 



9 Fresh open water 



10 Fresh scrub-shrub 



11 Mangroves 



12 Mud flats 



13 Nearshore gulf 



14 Rivers, streams 



15 Estuarine aquatic bed 



16 Estuarine open water 



17 Salt marsh 



18 Spoil banks 



19 Upland forest 



20 Urban-industrial 



Total 



730 



352 



594 



5 



-294 



(b) 

 2049 

 -983 



172 

 7795 

 1021 

 -248 



-378 



358551 358485 



Due to differences in classification and resolution 

 between the 1955 and 1978 maps, care must be taken in 

 interpreting the area changes shown in this table. 

 .See text for a more complete explanation. 

 Brackish marsh was not delineated on the 1955 maps, 

 but was included with salt marsh as "nonfresh marsh." 

 Therefore, the change in salt marsh number was set 

 equal to the change in total nonfresh marsh. 



146 



