Lichen abundance on two tree species

Lichen_Names.csv:
this is a csv file (34 rows, 2 columns), with a header line. The first column
is lichen species scientific names. Species names are as listed in the most
recent Checklist of North American Lichen (Esslinger 2019). The second column
is the species codes as used in the associated manuscript.

bF_abundanceTreeLevel.csv:
this is a csv file (21 rows, 26 columns, with a header line). The data describe
lichen abundance on 21 balsam fir (Abies
balsamea) trees in the Central Avalon Ecoregion, island of Newfoundland,
Canada. The first column is the TreeID. The remaining columns list the
abundance (number of individual thalli) of each species found on each tree.
Associated species names for each code are found in the Lichen_Names.csv file

yB_abundanceTreeLevel.csv:
this is a csv file (21 rows, 31columns, with a header line). The data describe
lichen abundance on 21 yellow birch (Betula
alleghaniensis) trees in the Central Avalon Ecoregion, island of
Newfoundland, Canada. The first column is the TreeID. The remaining columns
list the abundance (number of individual thalli) of each species found on each
tree. Associated species names for each code are found in the Lichen_Names.csv
file.

TreeSiteData_BF.csv:
this is a csv file (21 rows, 16 columns, with a header file). The data are the
tree-and site level data for the 21 balsam fir (Abies balsamea) trees.

TreeSiteData_YB.csv:
this is a csv file (21 rows, 16 columns, with a header file). The data are the
tree-and site level data for the 21 balsam fir (Betula alleghaniensis) trees.

For the two
“TreeSiteData” files, the column details are as follows

·
TreeID: The treeID number (same as in the lichen
abundance datasets)

·
Texture: a categorical variable that ranks the
bark texture from 1-3 (1 is relatively smooth, 2 is moderately ridged, 3 is
deeply and heavily ridged)

·
Canopy1: This is the canopy cover (percent
cover) at the tree base measured using a spherical densiometer

·
Height: This is the height of the tree, in
metres, measured using a Suunto Clinometer

·
pH: This is the bark pH, measured following the
procedure outlined in the manuscript

·
Age: The is the age of the tree, as measured
using an increment borer

·
Age_AG: The age of the tree as measured by a
second technician who checked the tree cores

·
Slope: This is the slope (percent) of the plot
taken at the centre of the plot, measured with a Suunto clinometer

·
Positon: These are categorical values to
describe the slope positon on which the tree is found on; 1: upper slope, 2:
mid slope, 3: lower slope, 4: toe, or 5: level.

·
Aspect: Compass aspect (0-360°)
adjusted for declination at which the slope faces

·
Adj_aspect: Compass aspect adjusted to absolute
from North (values 0-180°)

·
Cardinal: The cardinal direction of the slope
face (taken from Aspect) but adjusted as categorical data; 1: north, 2:
northeast, 3: east, 4: southeast, 5: south, 6: southwest, 7: west, 8 northwest.

·
Distance: Distance between the two trees at
the site.

·
Canopy2: Average canopy density taken at the
centre of the site (mid-way point between the two tree species sampled

·
Density: Stem density in the stand, measured
using the point-quarter method, as outlined in the methods section of the
manuscript.