. Cooperative Gulf of Mexico estuarine inventory and study, Florida / J. Kneeland McNulty, William N. Lindall, Jr., and James E. Sykes. Estuarine biology Park Service, showing mangrove and tidal marsh areas in Everglades National Park. Most man- grove areas are shown on navigation charts and topographic maps. Tidal marsh is not desig- nated as such on charts and maps; only "marsh" or "swamp" is designated. Tidal marsh was separated from freshwater marsh by assuming that it penetrated inland to less than the 5-ft () contour and that wooded marsh shown on most
. Cooperative Gulf of Mexico estuarine inventory and study, Florida / J. Kneeland McNulty, William N. Lindall, Jr., and James E. Sykes. Estuarine biology Park Service, showing mangrove and tidal marsh areas in Everglades National Park. Most man- grove areas are shown on navigation charts and topographic maps. Tidal marsh is not desig- nated as such on charts and maps; only "marsh" or "swamp" is designated. Tidal marsh was separated from freshwater marsh by assuming that it penetrated inland to less than the 5-ft () contour and that wooded marsh shown on most topographic maps is essentially fresh- water habitat. Local field checks verify our assumption. We did not verify the boundaries by field observations along the entire coast. Submerged vegetation was mapped freehand on 1,200-Series navigation charts by consulting aerial photographs of coastal areas. The photog- raphy was made available for study by virtually every county engineering or tax assessor's office on the west coast. The photography was gen- erally 1:400 scale, less than five years old, and of excellent quality for our purpose. Field checks usually verified our interpretation of the photo- graphs. We calculated the relative areas characterized by mangroves, tidal marsh, submerged vegeta- tion, and unvegetated bottom (Fig. 27), If the total area of estuaries (3,003,213 acres = 1,215,400 ha) is considered to be the area of open water plus the area of mangrove swamps. Figure 27.—The percentage of mangrove swamp, tidal marsh, submerged vegetation, and unvegetated bottom. and tidal marshes, approximately one-half of the area is unvegetated; the remaining half is about equally divided among mangrove swamps, tidal marshes, and submerged vegetation. The area of submerged vegetation (520,431 = 210,618 ha) is about one-quarter of the open-water surface area. GEOLOGY The Floridian Plateau originated as a massive appendage of the North American continent in mid-Triassic time (20
Size: 1574px × 1588px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionamericana, bookleafnumber62, books
