CWT-LTER Data Set Summary

Accession: 1130 CWT Research Theme: Population and System Dynamics
Contributors: Katherine Elliott, Chelcy Ford Miniat, Jason Love
Title: Eastern Hemlock (Tsuga canadensis) Tree Growth Study
Abstract: We initiated a study to assess the impacts of the Hemlock Wooly Adelgid on Eastern Hemlock, Tsuga canadensis, communities at Coweeta. The Hemlock Wooly Adelgid, Adelges tsugae, was first found at Coweeta in 2003. We established 12 20 x 20 m plots: 4 were control hardwood stands, 4 were untreated hemlock communities, and 4 were hemlock that were girdled so we could assess the immediate impact that hemlock death would have on nutrient cycling, the herbaceous community, and other ecosystem functions. This data set is based on yearly dendrometer band and DBH readings to assess tree growth and to track the death and in-growth of individual trees.
Key Words: Adelges tsugae, dendrometer bands, Eastern Hemlock, Hemlock Woody Adelgid, Tree growth, Tsuga canadensis
LTER Core Area: Population Studies
CWT Themes: Population and System Dynamics, Plant Ecology
Study Type: Coweeta LTER / USDA FS Long Term Monitoring
Study Period: 01-Jan-2004 to 31-Dec-2011
Site References:
CWTBASIN -- Coweeta Basin, Macon County, North Carolina, USA
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Data Table: 1130 (Main data table for data set 1130, 1436)

Access: Public (released 30-Oct-2012)

Metadata: Text (ESA FLED), Basic EML, Complete EML

Data Formats: Spreadsheet CSV Text Format, EML-described Text Format, Tab-delimited Text Report with Statistical Summary, GCE Data Toolbox Format, Standard MATLAB Variables Format

Column List:

Column Name Units Type Description (hide)
1 Tag_No none alphanumeric string Number on aluminum tag
2 Species none alphanumeric string Tree species; the first 3 letters are genus, and the last 3 letters species (e.g., quealb = Quercus alba)
3 Site none alphanumeric string There are 3 major sites: Ball Creek, Shope Fork, and Coweeta Creek; sapflow refers to the sapflow plots near Shope Fork; Treatment: There are 3 treatments: girdled (all hemlocks are girdled); hardwood (dominated by hardwoods); and control (dominated by hemlock)
4 Plot_No none integer Plot number
5 Treatment none alphanumeric string Treatment category
6 Diameter_2004_299 cm floating-point Diameter at breast height (or close to it) to the nearest 0.1 cm in year 2004 and julian day 299
7 D_Band_2004_299 mm floating-point Caliper reading of dendrometer band to the nearest 0.01 mm in year 2004 and julian day 299
8 Status_2004_299 none alphanumeric string There are 3 status codes: live, dead, and dead_fallen (on the ground). Status during survey year 2004 and julian day 299
9 Diameter_2005_046 cm floating-point Diameter at breast height (or close to it) to the nearest 0.1 cm in year 2005 and julian day 46
10 D_Band_2005_046 mm floating-point Caliper reading of dendrometer band to the nearest 0.01 mm in year 2005 and julian day 46
11 Status_2005_046 none alphanumeric string There are 3 status codes: live, dead, and dead_fallen (on the ground). Status during survey year 2005 and julian day 46
12 Diameter_2005_343 cm floating-point Diameter at breast height (or close to it) to the nearest 0.1 cm in year 2005 and julian day 343
13 D_Band_2005_343 mm floating-point Caliper reading of dendrometer band to the nearest 0.01 mm in year 2005 and julian day 343
14 Status_2005_343 none alphanumeric string There are 3 status codes: live, dead, and dead_fallen (on the ground). Status during survey year 2005 and julian day 343
15 Diameter_2006_348 cm floating-point Diameter at breast height (or close to it) to the nearest 0.1 cm in year 2006 and julian day 348
16 D_Band_2006_348 mm floating-point Caliper reading of dendrometer band to the nearest 0.01 mm in year 2006 and julian day 348
17 Status_2006_348 none alphanumeric string There are 3 status codes: live, dead, and dead_fallen (on the ground). Status during survey year 2006 and julian day 348
18 Diameter_2007_309 cm floating-point Diameter at breast height (or close to it) to the nearest 0.1 cm in year 2007 and julian day 309
19 D_Band_2007_309 mm floating-point Caliper reading of dendrometer band to the nearest 0.01 mm in year 2007 and julian day 309
20 Status_2007_309 none alphanumeric string There are 3 status codes: live, dead, and dead_fallen (on the ground). Status during survey year 2007 and julian day 309
21 Diameter_2009_30 cm floating-point Diameter at breast height (or close to it) to the nearest 0.1 cm in year 2009 and julian day 30
22 D_Band_2009_30 mm floating-point Caliper reading of dendrometer band to the nearest 0.01 mm in year 2009 and julian day 30
23 Status_2009_30 none alphanumeric string There are 3 status codes: live, dead, and dead_fallen (on the ground). Status during survey year 2009 and julian day 30
24 Diameter_2010_71 cm floating-point Diameter at breast height (or close to it) to the nearest 0.1 cm in year 2010 and julian day 71
25 D_Band_2010_71 mm floating-point Caliper reading of dendrometer band to the nearest 0.01 mm in year 2010 and julian day 71
26 Status_2010_71 none alphanumeric string There are 3 status codes: live, dead, and dead_fallen (on the ground). Status during survey year 2010 and julian day 71
27 Diameter_2011_20 cm floating-point Diameter at breast height (or close to it) to the nearest 0.1 cm in year 2011 and julian day 20
28 D_Band_2011_20 mm floating-point Caliper reading of dendrometer band to the nearest 0.01 mm in year 2011 and julian day 20
29 Status_2011_20 none alphanumeric string There are 3 status codes: live, dead, and dead_fallen (on the ground). Status during survey year 2011 and julian day 20
30 Notes_Pre_2010 none alphanumeric string Comments regarding surveys prior to 2010
31 Notes_2010 none alphanumeric string Comments regarding the survey performed in 2010
32 Notes_2011 none alphanumeric string Comments regarding the survey performed in 2011