Exploring the variability of tropical savanna tree structural allometry with terrestrial laser scanning

This repository contains the analysis scripts of Exploring the variability of tropical savanna tree structural allometry with terrestrial laser scanning.

System Requirements

R statistical freeware:

R version 3.6.0

R dependencies (packages):

• AICcmodavg_2.3-0
• car_3.0-8
• caret_6.0-86
• chngpt_2020.5-21
• devtools_2.3.1
• dplyr_1.0.0
• ggplot2_3.3.2
• ggpubr_0.4.0
• gridExtra_2.3
• nlme_3.1-139
• PairedData_1.1.1
• praise_1.0.0
• RColorBrewer_1.1-2
• tidyverse_1.3.0
• visreg_2.7.0

note: the code was written on a Windows 10 (V 1909) machine

Scripts

spatial_dist_survey_types

This script produces Figure 5, a spatial distribution map and histogram for manual and TLS survey.

paired_t-test

This script supports Figure 6, the difference in tree counts in the manual and TLS survey in simulated grid cells. The t-test evaluates the statistical difference between the manual and TLS survey.

DBH_field_vs_LiDAR

This script produces Figure 7, comparing the DBH measured for individual trees in the manual and TLS survey.

DBH_vs_Crown

This script produces Figure 8, exploring the relationship between DBH and tree crown size.

note: the working directory will need to be specified by the user