. Bulletins of American paleontology. 54 Bulletin 361 SITES RadKxnetric Dales -1960 AD â 10 -1900 AD â 20 1570-1730 AO 1 30 50 1120-1280 AD 1 60 70 70BC-70AD 1 80. .^.i>^ 0 10 20 PERCENT ABUNDANCE 0 <0 a 3D 40 0 0 02 04 SQUAHEO CHORD DISTANCE I i I I ⢠t ⢠I I ⢠⢠⢠I ⢠I I ⢠⢠I t IV d1 IV (12 IV HI IV d2 Dwarf Mangroves Brackish Marshes and Wei Prairies W/el Prairies/ Sparse Sawgrass Marshes ^^ Myrica t ^ Asteraceae Text-figure 9.âPercent abundance of pollen of major plant groups at site 8. Mud Creek. SCD values show lowest squared chord distance values for modern analogs; SCD
. Bulletins of American paleontology. 54 Bulletin 361 SITES RadKxnetric Dales -1960 AD â 10 -1900 AD â 20 1570-1730 AO 1 30 50 1120-1280 AD 1 60 70 70BC-70AD 1 80. .^.i>^ 0 10 20 PERCENT ABUNDANCE 0 <0 a 3D 40 0 0 02 04 SQUAHEO CHORD DISTANCE I i I I ⢠t ⢠I I ⢠⢠⢠I ⢠I I ⢠⢠I t IV d1 IV (12 IV HI IV d2 Dwarf Mangroves Brackish Marshes and Wei Prairies W/el Prairies/ Sparse Sawgrass Marshes ^^ Myrica t ^ Asteraceae Text-figure 9.âPercent abundance of pollen of major plant groups at site 8. Mud Creek. SCD values show lowest squared chord distance values for modern analogs; SCD < are considered to be close analogs for fossil assemblages. Cluster designations refer to clusters designated in Text-figure 3 and Table 3. Ovals indicate presence of molluscs or foraminifers picked from sediments. Foraminifer presence also was noted when foraminifer linings ("mieroforams") were observed in palynological preparations. Fresh-water algal presence is based on presence of Ovoidites in palynological preparations. sible global warming over the next century (Watson et al., 1996). Additionally, the drier conditions indicated during parts of the Little Ice Age are consistent with climate model predictions of lower precipitation due to cooling of Gulf surface temperatures (Overpeck et al., 1989). A more difficult question to address confi- dently is the impact of future warming on an already disturbed ecosystem. Prior to compartmentalization of the marshes by canals and levees in the 20"^ century, it appears that broad-scale subenvironments of the Ev- erglades responded similarly to climatic fluctuations. Changes over the last century have altered water levels and the natural rhythm of seasonal hydroperiod fluc- tuations in the Everglades wetland, resulting in a land- scape characterized by localized fluctuations in hydro- period, disturbance, nutrient status, and salinity. The resulting ecological heterogeneity makes modeling pr
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