(Figures — continued) 



No. Page 



23.— Map of Western Choctawhatchee and East Bays 44-45 



24. — Map of Escambia, Pensacola, and Perdido Bays 46-47 



25.— Diagrammatic cross section of a mangrove swamp, a barrier island of the north coast, 



and a transect from tidal channels to flatwoods on the north coast 49 



26. Schematic drawings of the zonation of sea grasses in shallow water in Boca Ciega 



Bay and Tampa Bay and salinity preferences and tolerances of sea grasses 50 



27. The percentage of mangrove swamp, tidal marsh, submerged vegetation and unvege- 



tated bottom 52 



28. — Geologic cross section through Florida 53 



29. — The principal geologic structures of Florida 53 



30. — The age of geologic formations 53 



31. — Topographic divisions 54 



32. — Principal aquifers 54 



33. — Mean discharge of the principal gaged streams of the Florida west coast 55 



34. — Monthly range and mean of water temperature at four locations 83 



35. — Mean salinity and salinity range in estuaries from Florida Bay to Homosassa Bay ... 84 



36. — Mean salinity and salinity range in estuaries from Crystal Bay to Cedar Keys 85 



37. — Mean salinity and salinity range in estuaries from Ochlockonee Bay to Pensacola Bay . . 86 



38. — The distribution of population on the west coast of Florida, 1960 88 



39. — The gain and loss of population on the west coast of Florida from 1950 to 1960 88 



40. — The major products of industry 92 



41. — The major west coast species landed in the commercial fisheries in 1967 by coastal 



segment 94 



42. — Landings of the most valuable west coast species in the commercial fisheries in 1967 



by coastal segment 95 



43. — The flow of pollutants into estuarine areas by coastal segment 110 



44. — The distribution of major sources of pollution and areas that are closed to shellfishing . Ill 



45. — The distribution of Class II waters — those suitable for shellfish harvesting 116 



46. — The relation between the human population in communities bordering estuaries and 



the filled area, the number of pollution sources, and the area closed to shellfishing in 



the eight segments of coast 120 



Tables 



1. Surface area at mean high water, volume at mean high water, and maximum di- 

 urnal tidal range of estuarine study areas, west coast of Florida 4 



2. The areas and major species of submerged vegetation, tidal marsh, and mangrove 

 swamps of estuarine study areas, west coast of Florida 51 



3-1. Stream discharge to the Everglades: U.S. Geological Survey Station 2-2890, Tam- 



iami Canal Outlets, Miami to Monroe, Florida 56 



3-2. Stream discharge to Ten Thousand Islands: U.S. Geological Survey Station 2-2910, 



Barron River Canal near Everglades, Florida 56 



3-3. Stream discharge to Naples Bay via Gordon River: U.S. Geological Survey Station 



2-2913, Golden Gate at Naples, Florida 57 



3-4. Stream discharge to the Caloosahatchee River: U.S. Geological Survey Station 



2-2920, Caloosahatchee Canal at Moore Haven, Florida 57 



(Continued on next page) 

 iv 



