ecofolio: ecofolio: tools to estimate metapopulation portfolio effects
In seananderson/ecofolio: Tools to quantify metapopulation portfolio effects
Description
The ecofolio package is a set of tools for estimating
(metapopulation) ecological portfolio effects. It accompanies
the manuscript:
Anderson, S.C., A.B. Cooper, N.K. Dulvy. Ecological prophets:
Quantifying metapopulation portfolio effects. Methods in Ecology
and Evolution.
Details
The ecological portfolio concept holds that we can
consider groups of populations as assets in a portfolio
(metapopulation). We can then ask similar questions that we ask of
financial portfolios such as how much more stable is the
diverse "portfolio" than any single homogeneous "asset". This
increase in stability due to the diverse portfolio structure is
referred to as the ecological portfolio effect.
The main functions are pe_mv, which estimates the
mean-variance portfolio effect; pe_avg_cv, which
estimates the average-CV portfolio effect;
fit_taylor, which fits Taylor's power law; and
plot_mv, which plots various mean-variance
extrapolation models.
The functions focus on single-species metapopulations or
other analogous scenarios (e.g. fisheries catch of different
species or other forms of spatially segregated populations). Most of
the functions are not appropriate to use with community data where
the "assets" can strongly interact with each other. At present, the
package includes two other metrics that can be used in this
scenario: the synchrony index and the
thibaut_connolly_dsr index, which come from other
papers that are referenced within those functions.
seananderson/ecofolio documentation built on May 29, 2019, 4:25 p.m.
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Description
The ecofolio package is a set of tools for estimating (metapopulation) ecological portfolio effects. It accompanies the manuscript:
Anderson, S.C., A.B. Cooper, N.K. Dulvy. Ecological prophets: Quantifying metapopulation portfolio effects. Methods in Ecology and Evolution.
Details
The ecological portfolio concept holds that we can consider groups of populations as assets in a portfolio (metapopulation). We can then ask similar questions that we ask of financial portfolios such as how much more stable is the diverse "portfolio" than any single homogeneous "asset". This increase in stability due to the diverse portfolio structure is referred to as the ecological portfolio effect.
The main functions are pe_mv, which estimates the
mean-variance portfolio effect; pe_avg_cv, which
estimates the average-CV portfolio effect;
fit_taylor, which fits Taylor's power law; and
plot_mv, which plots various mean-variance
extrapolation models.
The functions focus on single-species metapopulations or
other analogous scenarios (e.g. fisheries catch of different
species or other forms of spatially segregated populations). Most of
the functions are not appropriate to use with community data where
the "assets" can strongly interact with each other. At present, the
package includes two other metrics that can be used in this
scenario: the synchrony index and the
thibaut_connolly_dsr index, which come from other
papers that are referenced within those functions.
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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