Georgia Coastal Ecosystems LTER Data Set Details

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GCE-LTER Data Set Summary

Accession:

BOT-GCET-2212

Research Theme:

Botany (Graduate Thesis Study)

Contributors:

Katharine Napora, Victor Thompson

Title:

Bald cypress radiocarbon and dendrochronological data from trees located in the Altamaha Wildlife Management Area and on Sapelo Island, Georgia, USA

Abstract:

Ancient bald cypress trees buried under anoxic mud on the Altamaha Wildlife Management Area islands were sampled, prepared, radiocarbon dated, and the ringwidths measured for crossdating. Modern bald cypress samples were also obtained from Sapelo Island. Tree rings were measured using a Velmex and Measure J2X software and/or the ObjectJ extension of ImageJ. Measured radii were crossdated using visual dendrochronological methods and Cofecha software. Tree rings anchored to the present date back to 3161 B.C.E. and extend to 2016 C.E. In addition, the oldest two trees provide another 529 years of ringwidth data. This work was conducted under the National Science Foundation Doctoral Dissertation Improvement Award: Human Adaptation to Long Term Environmental Change (Award #1834682). All samples are part of the accessioned collections of the University of Georgia Laboratory's of Archaeology.

DOI:

(not assigned)

Key Words:

Altamaha River, annual, climate change, forests, long term, ringwidth; radiocarbon dates, Sapelo Island, Taxodium distichum, UGA

LTER Core Area:

Population Studies

Research Themes:

Botany, Population Ecology

Study Period:

01-Jun-2016 to 10-Apr-2021

Study Sites:

Sapelo -- Sapelo Island, Sapelo Island, Georgia
GA_Coast -- Georgia Coast, Southeast Georgia

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Downloads:

Data Table: BOT-GCET-2212 (Main data table for data set BOT-GCET-2212, 123 records)

Access: Public (released 10-Apr-2023)

Metadata: Text (ESA FLED), XML (Ecological Metadata Language)

Data Formats: Spreadsheet (CSV) [13.69kb], Text File [14.02kb], MATLAB (GCE Toolbox) [28.50kb], MATLAB (Variables) [28.72kb], Text Report [33.69kb]

Column List:(display)

Column	Name	Units	Type	Description
1	SampleID	none	integer	Project sample number
2	Pieces	count	integer	Number of pieces making up sample from this SampleID
3	Latitude	degrees	floating-point	Decimal degrees, Northing
4	Longitude	degrees	floating-point	Decimal degrees, Westing
5	IR_SampleID	none	string	Inner ring radiocarbon sample ID
6	IR_UGAMS	none	integer	Inner ring UGAMS number (Center for Applied Isotope Studies sample number)
7	IR_Raw14C	years	floating-point	Inner ring raw 14C radiocarbon measurement, years BP (uncalibrated, corrected for isotope fractionation)
8	IR_Error	years	floating-point	Inner ring radiocarbon error (quoted as one standard deviation, reflecting statistical and experimental errors)
9	IR_d13C	‰	floating-point	Inner ring ?13C
10	IR_Cal_Dates_From	years	floating-point	2 sigma calibrated inner ring date range using OxCal Version 4.4 and employing IntCal20 Northern Hemisphere Curve, rounded off by 5 years (beginning of range)
11	IR_Cal_Dates_To	years	floating-point	2 sigma calibrated inner ring date range using OxCal Version 4.4 and employing IntCal20 Northern Hemisphere Curve, rounded off by 5 years (end of range)
12	OR_SampleID	none	string	Outer ring radiocarbon sample ID
13	OR_UGAMS	none	integer	Outer ring UGAMS number (Center for Applied Isotope Studies sample number)
14	OR_Raw14C	years	floating-point	Outer ring raw 14C radiocarbon measurement, years BP (uncalibrated, corrected for isotope fractionation)
15	OR_Error	years	floating-point	Outer ring radiocarbon error (quoted as one standard deviation, reflecting statistical and experimental errors)
16	OR_d13C	‰	floating-point	Outer ring ?13C
17	OR_Cal_Dates_From	years	floating-point	2 sigma calibrated outer ring date range using OxCal Version 4.4 and employing IntCal20 Northern Hemisphere Curve, rounded off by 5 years (beginning of range)
18	OR_Cal_Dates_To	years	floating-point	2 sigma calibrated outer ring date range using OxCal Version 4.4 and employing IntCal20 Northern Hemisphere Curve, rounded off by 5 years (end of range)
19	Dendro_InnerDate	years	floating-point	Inner date as indicated by crossdating against tree-ring chronology developed from samples
20	Dendro_OuterDate	years	floating-point	Outer date as indicated by crossdating against tree-ring chronology developed from samples
21	Years	years	floating-point	Number of years represented by sample
22	InChron	none	string	Indicates whether sample has been incorporated into tree-ring chronology. if excluded, indicates reason for exclusion
23	Notes	none	string	Additional relevant information about sample

Text Data file: BOT-GCET-2212_Altamaha-FloatingChron_RingwidthMeasurements (Crossdated tree ring measurements in microns (Tucson compact format))

Access: Public (released 10-Apr-2023)

Metadata: XML (Ecological Metadata Language)

Data Formats: ASCII text [4.74 kb]

Text Data file: BOT-GCET-2212_Altamaha-TreeRingChron_RingwidthMeasurements (Crossdated tree ring measurements in microns (Tucson compact format))

Access: Public (released 10-Apr-2023)

Metadata: XML (Ecological Metadata Language)

Data Formats: ASCII text [231 kb]

Citation:

Napora, Katharine. 2022. Bald cypress radiocarbon and dendrochronological data from trees located in the Altamaha Wildlife Management Area and on Sapelo Island, Georgia, USA. Georgia Coastal Ecosystems LTER Project, University of Georgia, Long Term Ecological Research Network. https://gce-lter.marsci.uga.edu/data/BOT-GCET-2212

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