summ_d2b

Internal function, used in <code>resistance()</code>, <code>recovery_rate()</code> and
<code>recovery_extent()</code> to create a baseline value out of the
pre-disturbance values in the disturbed system.

internal

Standardises and facilitates the use of eleven established stability properties that have been used to assess systems’ responses to press or pulse disturbances at different ecological levels (e.g. population, community). There are two sets of functions. The first set corresponds to functions that measure stability at any level of organisation, from individual to community and can be applied to a time series of a system’s state variables (e.g., body mass, population abundance, or species diversity). The properties included in this set are: invariability, resistance, extent and rate of recovery, persistence, and overall ecological vulnerability. The second set of functions can be applied to Jacobian matrices. The functions in this set measure the stability of a community at short and long time scales. In the short term, the community’s response is measured by maximal amplification, reactivity and initial resilience (i.e. initial rate of return to equilibrium). In the long term, stability can be measured as asymptotic resilience and intrinsic stochastic invariability. Figueiredo et al. (2025) <doi:10.32942/X2M053>.

Ludmilla Figueiredo

estar

Ecological Stability Metrics

Viktoriia Radchuk

Cédric Scherer

summ_d2b function

<dl><dt>b_tf</dt>
<dd>a numerical vector, specifying the beginning and end of the
pre-disturbance time period for the disturbed time-series that defines
the baseline. Obligatory if (<code>b = "d"</code>), see 'Details'.</dd>
<dt>na_rm</dt>
<dd>a logical determining whether NAs should be taken out prior
to the estimation of the stability metric. Defaults to TRUE.</dd></dl>

Arguments

Summarize the values of the state variable in a disturbed system into a baseline — summ_d2b

<dl>

<dt>b_tf</dt>
<dd>a numerical vector, specifying the beginning and end of the
pre-disturbance time period for the disturbed time-series that defines
the baseline. Obligatory if (<code>b = "d"</code>), see 'Details'.</dd>


<dt>na_rm</dt>
<dd>a logical determining whether NAs should be taken out prior
to the estimation of the stability metric. Defaults to TRUE.</dd>

</dl>

summ_d2b: Summarize the values of the state variable in a disturbed system into a baseline

Description

Usage

Value

Arguments