TITLE: Outer bark thickness decreases more with height on stems of fire-resistant than fire-sensitive Floridian oaks (Quercus spp.; Fagaceae) DATE:December 8, 2014 AUTHOR FOR CORRESPONDENCE: Sarah J. Graves (sjgraves@ufl.edu) Results are published in: Graves, S. J., Rifai, S. W., & Putz, F. E. (2014). Outer bark thickness decreases more with height on stems of fire-resistant than fire-sensitive Floridian oaks (Quercus spp.; Fagaceae). American Journal of Botany, 101(12), 2183-2188 doi:10.3732/ajb.1400412 # CONTENTS 1. READ.ME.txt - This file. 2. bark_thickness_data.csv 4. bark_thickness_analysis.r ####### File: bark_thickness_data.csv Data collected by Sarah Graves with the help of co-authors and other students at the University of Florida Collection was done in 4 locations: Prairie Creek Preserve (PC, http://alachuaconservationtrust.org) San Felasco State Park (SF, http://www.floridastateparks.org/sanfelascohammock/) Ichetucknee State Park (IS, http://www.floridastateparks.org/ichetuckneesprings/) Flamingo Hammock Landtrust (FL, Southwest Gainesville) All data collect was done with permission from land owners or responible agencies, including a Florida State Park Reserach/Collecting permit. Variable names and descriptions tree = unique tree id number; 1-42 location = sampling location; see data collection locations above habitat = habitat distinction; sandhill=fire-resistant, hammock=fire-susceptible species = 4 letter species code; quhe = Quercus hemisphaerica Bartr. ex. Willd qumi - Quercus michauxii Nutt. quni - Quercus nigra L. qula - Quercus laevis Walter qufa - Quercus falcata Michx. quma - Quercus margaretta Ashe clade = clade distinction; red or white height = height at witch sample was taken in cm diam = diameter of the stem at the particular height in cm TB1-5 = absolute total bark thickness in mm, 5 equally spaced measurements for each sample OB1-5 = absolute outer bark thickness in mm, 5 equally spaced measurements for each sample IB1-5 = absolute inner bark thickness in mm, 5 equally spaced measurements for each sample tbmean = mean of 5 total bark measurements in mm obmean = mean of 5 outer bark measurements in mm ibmean = mean of 5 inner bark measurements in mm tbvar = variance of 5 horizontal total bark measurements obvar = variance of 5 horizontal outer bark measurements ibvar = variance of 5 horizontal inner bark measurements tbrel = relative total bark thickness, calculated as (tbmean/10)/(diam/2)*100 obrel = relative outer bark thickness, calculated as (obmean/10)/(diam/2)*100 ibrel = relative inner bark thickness, calculated as (tbmean/10)/(diam/2)*100 ####### File: bark_thickness_analysis.r This file is the R script for analysis of the bark_thickness_data.csv data file. The code utilizes the packages: nlme, lme4, and MuMIn. No files are saved with this script. All output is made in line or as plots. The working directory must be set to where the bark_thickness_data.csv file is saved.