Learn R Programming

datana (version 1.0.6)

hawaii: Diameter growth increments of a tropical tree species in Hawaii

Description

Tree size, competition, and diameter growth increment of *Metrosideros polymorpha* trees collected in the Kilauea Volcano, Hawaii. Data containing 64 observations at the current annual growth rate (defined as dbh increment within one calendar year) of each tree was measured from 1986 to 1988.

Usage

data(hawaii)

Arguments

Format

The dataframe has the following columns:

tree.code

Tree number identification. The first letter of the ID representsa cohort. Six cohorts representing a chronosequence were sampled.

dbh

Initial stem diameter, in cm.

toth

Total height, in m.

crown.area

Crown outline area, in square meters.

comp.ind

Competition index (Basal area of nearest neighbor divided by square of distance to nearest neighbor plus basal area of second nearest neighbor divided by square of distance to second nearest neighbor).

cai.1986

Current annual stem diameter increment during 1986, in mm.

cai.1987

Current annual stem diameter increment during 1987, in mm.

cai.1988

Current annual stem diameter increment during 1988, in mm.

References

Gerrish G, Mueller-Dombois D. 1999. Measuring stem growth rates for determining age and cohort analysis of a tropical evergreen tree. Pacific Science. 53(4): 418-429.

Examples

Run this code
data(hawaii)    
head(hawaii) 

Run the code above in your browser using DataLab