Description

This file contains estimates of plant and litter cover within the rings of the EucFACE experiment, evaluating forest ecosystem responses to elevated CO$_2$, on two dates. Within each ring are four plots and within each plot are four 1m by 1m subplots. Values represent counts along a grid of 16 points within each subplot.

Usage

Format

A data frame with 192 rows and 8 variables:

Date

integer Date of measurement (d/m/y, not yet converted to Date class)

Ring

integer The identity of the EucFACE Ring, the level at which the experimental treatment is applied.

Plot

integer A total of four plots, nested within each level of Ring.

Sub

integer A total of four subplots, nested within each level of Plot.

Forbes

integer Number of points where dicot plants are observed.

Grass

integer Number of points where grass is observed.

Litter

integer Number of points where leaf litter is observed.

Trt

integer The experimental treatment: ctrl for ambient levels of atmospheric carbon dioxide, elev for ambient plus 150ppm.

Source

Jeff Powell