calc_biomass: Calculate biomass

In phytomosaic/grlyr: Ground Layer Estimation

Description

Negative exponential model to calculate biomass while accounting for density variation with ground layer depth.

Usage

calc_biomass(x, ...)

Arguments

x	data.frame, minimally containing the columns c("plot","microquad","fg","cover","depth"). Each row is an observation for each functional grp within a microquad, nested within transects > subplots > plots.
...	further arguments (currently ignored).

Details

Returns estimates of biomass, organic carbon, total nitrogen, and C:N ratio for each functional group observed per microquad. Equations follow Smith et al. (2015). Example usage is in Smith et al. (2017).

Value

A data.frame of same number of rows as 'x', with new columns: 'mqid', 'type', 'predCN', 'predN', 'predC', 'mass', 'dens', 'nvalue', 'cvalue', 'volume', 'covercm'.

References

Smith, R.J., J.C. Benavides, S. Jovan, M. Amacher, and B. McCune. 2015. A rapid method for landscape assessment of carbon storage and ecosystem function in moss and lichen ground layers. The Bryologist 118(1): 32–45.

Smith, R. J., S. Jovan, A. N. Gray, and B. McCune. 2017. Sensitivity of carbon stores in boreal forest moss mats - effects of vegetation, topography and climate. Plant and Soil 421:31–42.

Examples

data(est)
x <- calc_biomass(est)
head(x)

phytomosaic/grlyr documentation built on May 25, 2020, 7:04 p.m.