ifri: Example data from the International Forestry Resources and...

Description Usage Format Source Examples

Description

This data set contains information on the number of stems (individuals) and basal areas for 34 vegetation plots inventoried in February 1997 in Lothlorien forest, 37 vegetation plots inventoried in February 1996 in May Creek Forest and 36 vegetation plots inventoried in May 1995 in Yellowwood State Forest. All three sites are in Indiana, USA. Data were gathered through IFRI inventory protocols to record any tree, palm and woody climber with diameter at breast height greater than or equal to 10 cm in 10-m radius circular plots; only tree species data were kept in the example data sets (IFRI research instruments and IFRI manual section P: Forest Plot Form, section D1: Tree, Palm and Woody Climber Information).

Usage

1

Format

A data frame with 486 observations on the following 5 variables.

forest

a factor with 3 levels: "LOT" (Lothlorien forest), "MCF" (May Creek Forest) and "YSF" (Yellowwood State Forest)

plotID

a factor with 107 levels providing an identification code for a 314.16 square metres (10 m radius) vegetation plot

species

a factor with 50 levels providing an 8 character code for a tree species

count

a numeric vector providing the number of stems (individuals) for each species in each vegetation plot

basal

a numeric vector providing the basal area (calculated from the diameter at breast height) in square cm for each species in each vegetation plot

Source

IFRI (2014) Data from the International Forestry Resources and Institutions (IFRI) research network. http://ifri.forgov.org/

Examples

1

Example output

Loading required package: tcltk
Loading required package: vegan
Loading required package: permute
Loading required package: lattice
This is vegan 2.5-4
BiodiversityR 2.11-1: Use command BiodiversityRGUI() to launch the Graphical User Interface; 
to see changes use BiodiversityRGUI(changeLog=TRUE, backward.compatibility.messages=TRUE)

Warning message:
no DISPLAY variable so Tk is not available 

BiodiversityR documentation built on April 20, 2021, 5:07 p.m.