USGS
South Florida Information Access
SOFIA home
Help
Projects
by Title
by Investigator
by Region
by Topic
by Program
Results
Publications
Meetings
South Florida Restoration Science Forum
Synthesis
Information
Personnel
About SOFIA
USGS Science Strategy
DOI Science Plan
Education
Upcoming Events
Data
Data Exchange
Metadata
publications > ofr > ecosystem history of southern and central biscayne bay > results: pollen assemblages and trends


Abstract
Introduction
Acknowledgements
Material and Methods
>Results
- Pollen Assemblages and Trends
- Faunal Assemblages and Trends
Discussion
Significant Findings, Implications And Future Work
References
Appendices
PDF version

Ecosystem History of Southern and Central Biscayne Bay: Summary Report on Sediment Core Analyses

U.S. Geological Survey Open File Report 03-375

Results

Pollen Assemblages and Trends

Pollen assemblages from No Name Bank (GLW402-NNA), Featherbed Bank (GLW402- FBA), and Card Bank (GLW402-CBA) are all strongly dominated (50- 99%) by Pinus (pine) pollen, with values decreasing during the 20th century (Figures 11-13, Appendices B, C, and D). Three assemblage zones are distinguishable in the three cores. The basal unit, zone 1, is characterized by an absence of Casuarina (Australian pine) pollen and extremely high abundance (>90%) of Pinus pollen. The base of zone 2 is marked by the appearance of Casuarina pollen; pollen of marsh taxa (grasses, sedges, asters) and fern spores are more abundant in this zone. The uppermost unit, zone 3, is distinguished by 15-20% Quercus (oak) pollen and sharp decreases in abundance of Pinus pollen to ~50%. In this unit, Casuarina and Myrica (wax myrtle) pollen also increase in abundance.

 

Figure 11. (right) Percent abundance of pollen of major plant types, at No Name Bank (GLW402-NNA). "Marsh taxa" includes the Asteraceae, Cyperaceae, Nympheaceae, and Poaceae. (See Appendix B for data.) [larger image]

 graph showing percent abundance of pollen of major plant types, at No Name Bank

Figure 12. (right) Percent abundance of pollen of major plant types, Featherbed Bank core (GLW402-FBA). "Marsh taxa" includes the Asteraceae, Cyperaceae, Nympheaceae, and Poaceae. (See Appendix C for data.) [larger image]

 graph showing percent abundance of pollen of major plant types, Featherbed Bank core
Figure 13. (right) Percent bundance of pollen of major plant types, Card Bank core (GLW402-CBA). "Marsh taxa" includes the Asteraceae, Cyperaceae, Nympheaceae, and Poaceae. (See Appendix D for data.) [larger image] graph showing percent bundance of pollen of major plant types, Card Bank core

< Previous: Prelim Age Model | Next: Faunal Assemblages and Trends >


| Disclaimer | Privacy Statement | Accessibility |

U.S. Department of the Interior, U.S. Geological Survey
This page is: http://sofia.usgs.gov/publications/ofr/03-375/results.html
Comments and suggestions? Contact: Heather Henkel - Webmaster
Last updated: 10 December, 2003 @ 11:41 AM(HSH)