cue: Carbon Use Efficiency

In dpabon/ecofunr: Deriving Ecosystem Functional Properties

Description

This function estimate different metrics of Carbon Use Efficiency

Usage

cue(
  GPP,
  NEP,
  NPP,
  Rb,
  method = "plants",
  dates,
  aggregation.time = NULL,
  aggregation.metric = "median",
  overlapping = F,
  prob = 0.9
)

Arguments

GPP	Gross Primary Production (units)
NEP	Net Ecosystem Productivity (units)
NPP	Net Primary Productivity
Rb	Basal Respiration (See Reddyproc function XXX)
method	Can be "plants", "ecosystem", "apparent", "all". See details.
dates	a vector of class "Date" with the same length of GPP.
aggregation.time	Can be "NULL", "day", "month", "year", growing season "gs". if it's a number it's considered as a time window in number of days. If "optim" the optimum number of days will be estimate to reduce the sd of each chunck. See aggreg.
aggregation.metric	Can be "mean", "max", "min", "median", and "quant". if "quant" a number between 0 and 1 need to be provided for prob parameter.
overlapping	Can be "NULL" or a number. If it's a number equivale to the parameter by of the rollapply function.
prob	Only used if aggregation.metric is "quant", a number between 0 and 1. By default 0.9.

Value

An object of type "data.frame" if method = "all". Otherwise a numeric vector.

Methods

plants Carbon Use efficiency (CUE) provides a measure of what fraction of total carbon assimilation becomes incorported into new tissues. \insertCitechambers_respiration_2004ecofunr

CUE = NPP / GPP

ecosystem \insertCitefernandez-martinez_nutrient_2014ecofunr:

CUE = NEP / GPP

apparent (Reference is missing)

CUE = 1 - (Rb / GPP)

For a complete review about all CUE metrics at different spatial and temporal scales check \insertCitemanzoni_reviews_2018ecofunr

References

\insertAllCited

dpabon/ecofunr documentation built on July 15, 2020, 12:58 p.m.