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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 using band dendrometers.
Usage
data(hawaii)
Format
The data frame has the following columns:
- tree.code
Tree number identification. The first letter of the ID represents a cohort. Six cohorts representing a chronosequence were sampled.
- dbh
Initial stem diameter, in cm.
- htot
Total height, in m.
- crown.area
Crown outline area, in m
^{2}.- 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.
Source
The data were obtained from Gerrish and Mueller-Dombois (1999).
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
data(hawaii)
head(hawaii)