dda: Density-dependent aggregation model

In spatialwarnings: Spatial Early Warning Signals of Ecosystem Degradation

Density-dependent aggregation model

Description

dda is a list of matrices representing results from the density-dependent aggregation model (Siteur et al. 2023) in dda. dda.pars is a data frame with the model parameters. Each row of dda.pars corresponds to a matrix in dda, in the same order. All parameters were maintained constant, except for tau (see model definition in Siteur et al. 2023).

Usage

dda

dda.pars

Format

An object of class list of length 4.

An object of class data.frame with 4 rows and 5 columns.

Source

Kindly provided by Koen Siteur

References

Siteur, Koen, Quan-Xing Liu, Vivi Rottschäfer, Tjisse van der Heide, Max Rietkerk, Arjen Doelman, Christoffer Boström, and Johan van de Koppel. 2023. "Phase-Separation Physics Underlies New Theory for the Resilience of Patchy Ecosystems." Proceedings of the National Academy of Sciences 120 (2): e2202683120. https://doi.org/10.1073/pnas.2202683120.

Examples

ddasews <- lsw_sews(dda)
plot(ddasews, along = dda.pars[ ,"tau"]) # tau is the changing parameter

display_matrix(dda[[4]]) 

spatialwarnings documentation built on Aug. 18, 2025, 5:23 p.m.