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A Set of Tools for Calculating Spatial Synchrony Between Tree-Ring Chronologies.
Dendrosync is an R library that provides functions for the calculation and plotting of synchrony in the tree growth from tree-ring width chronologies (TRW index). It combines variance-covariance (VCOV) mixed modelling with functions that quantify the degree to which TRW chronologies contain a common temporal signal. It also implements temporal trends in spatial synchrony using a moving window. These methods can also be used with other kind of eacological variables that have temporal autocorrelation corrected.
Version 0.1.4
Depends: R (>= 3.1.2), nlme, ggplot2
The package contains different functions to evaluate synchrony in tree growth from tree-ring width chronologies. Each function is described in help files with clear examples. For a detailed description of the package visit: josugalday/r-stuff
Main functions:
dendro.varcov: it calculates variance-covariance
(VCOV) mixed models
mod.table: it provides a table to compare fitted
variance-covariance (VCOV) mixed models by AIC, AICc, BIC
sync: it calculates spatial synchrony from fitted
variance-covariance mixed models
sync.plot: it creates dot plots of within- and
between-group synchrony
sync.trend: it calculates temporal trends of spatial
sinchrony
sync.trend.plot: it creates a line chart showing
temporal trends of spatial synchrony
For any problem please contact with Josu G Alday (josucham@gmail.com) or Victor Resco (v.rescodedios@gmail.com)
Citation:
Alday JG; Shestakova TA, Resco de Dios V, Voltas J. (2018) DendroSync: An R package to unravel synchrony patterns in tree-ring networks. Dendrochronologia 47: 17-22.
These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.