dead.trees.growth {sitree}

Growth of Dead Trees

Description

A very simple function to estimate the growth of dead trees between the last measurement and their death. Dead trees are assumed to die in the middle of the period. The growth before the death of the tree is assumed to be half of the growth for the whole period, both in terms of DBH and height.

Usage

dead.trees.growth(dt, growth, mort, this.period)

Arguments

dt

A list of trees with at least two elements: dbh.mm and height.dm.

growth

A data frame with columns dbh.inc.mm and hgt.inc.dm.

mort

A TRUE/FALSE vector with the predicted mortality for each living tree in this period.

this.period

The period where the dead trees were last seen alive (last measured DBH).

Value

Returns a data frame of same length as dt with two elements

dbh.mm

DBH in mm

height.dm

Height in dm

Author(s)

Clara Anton Fernandez [e-mail]

Examples

dead.trees.growth(
  dt = list(dbh.mm = data.frame   (t0 = c(75, 90, 25, 24)),
            height.dm = data.frame(t0 = c(190, 210, 110, 90))),
  growth = data.frame(dbh.inc.mm = c(7, 9, 2, 1),
                      hgt.inc.dm = c(11, 12, 8, 10)),
  this.period = "t0"
)