Revealing the Floristic and Biogeographic Composition of Paleocene to Miocene Neotropical Forests

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Material Information

Title:
Revealing the Floristic and Biogeographic Composition of Paleocene to Miocene Neotropical Forests
Physical Description:
1 online resource (368 p.)
Language:
english
Creator:
Herrera, Fabiany A
Publisher:
University of Florida
Place of Publication:
Gainesville, Fla.
Publication Date:

Thesis/Dissertation Information

Degree:
Doctorate ( Ph.D.)
Degree Grantor:
University of Florida
Degree Disciplines:
Botany, Biology
Committee Chair:
MANCHESTER,STEVEN R
Committee Co-Chair:
JUDD,WALTER S
Committee Members:
BLOCH,JONATHAN I
BRENNER,MARK

Subjects

Subjects / Keywords:
cenozoic -- eocene -- fossils -- fruits -- miocene -- neotropics -- oligocene -- paleocene
Biology -- Dissertations, Academic -- UF
Genre:
Botany thesis, Ph.D.
bibliography   ( marcgt )
theses   ( marcgt )
government publication (state, provincial, terriorial, dependent)   ( marcgt )
born-digital   ( sobekcm )
Electronic Thesis or Dissertation

Notes

Abstract:
Most prior studies of the Neotropical fossil record have focused on pollen and leaf remains. While these studies provide insight into patterns of diversity and climate change, the resolution of taxonomic affinities has been at a coarse level. Fossil fruits and seeds provide additional characteristics of systematic significance. Confident identification of the floristic composition is key to understanding varying biogeographic patterns and the response of vegetation to tectonic changes. I am investigating selected, well-preserved carpofloras ranging from ~60 to ~19 Ma. from the Paleocene, Eocene, Oligocene and Miocene of Central America and northern South America (specifically Colombia, Peru, and Panama) to address the following major questions: 1) What plant families or genera from northern South America show biogeographic connection with other land masses during the late Paleocene? 2) Were wind-dispersed fruits and seed common elements in Paleocene Neotropical rainforests? 3) What families or genera first colonized the emergent land in the Panamanian volcanic arch during the late Eocene? 4) Do the fossil plants from the Oligocene of Peru show any biogeographic connection with the remaining South American region? 5) Did the Miocene Panamanian seaway act as a strong biogeographic barrier between South American and Central American forests? Results show that the Paleocene floras in Colombia reached a moderate, diverse array of winged fruit and seed types and modes of dispersal after the Cretaceous extinction. Although northern South America was isolated geographically, several fossils in Menispermaceae and Ulmaceae show connection with North American paleofloras and extant Old World taxa. Some of the new colonizing plant families/orders identified from late Eocene of Panama include Arecaceae, and the earliest Vitaceae and Humiriaceae in the Neotropics. At the generic level I have identified Dracontomelon and Leea, both of which are restricted today to Old World tropical rainforests. From Peru, some of the new Oligocene Belen taxa include endocarps of Duckesia (Humiriaceae), a genus endemic today to eastern Amazonia. Finally, from the early Miocene of Panama I have identified among others Sacoglottis, Parinari, Cissus, and Heliconia, suggesting that long distance dispersal between Central and South America was very common before the closing of the Panamanian Seaway.
General Note:
In the series University of Florida Digital Collections.
General Note:
Includes vita.
Bibliography:
Includes bibliographical references.
Source of Description:
Description based on online resource; title from PDF title page.
Source of Description:
This bibliographic record is available under the Creative Commons CC0 public domain dedication. The University of Florida Libraries, as creator of this bibliographic record, has waived all rights to it worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law.
Statement of Responsibility:
by Fabiany A Herrera.
Thesis:
Thesis (Ph.D.)--University of Florida, 2014.
Local:
Adviser: MANCHESTER,STEVEN R.
Local:
Co-adviser: JUDD,WALTER S.
Electronic Access:
RESTRICTED TO UF STUDENTS, STAFF, FACULTY, AND ON-CAMPUS USE UNTIL 2015-05-31

Record Information

Source Institution:
UFRGP
Rights Management:
Applicable rights reserved.
Classification:
lcc - LD1780 2014
System ID:
UFE0046675:00001