simmr: Stable Isotope Mixing Model for Dietary and Environmental Analysis

simmr is a software package designed as a long-term replacement for the widely-used SIAR package for fitting Stable Isotope Mixing Models (SIMMs). The package, authored by Emma Govan, uses methods detailed in peer-reviewed papers from 2010 and 2013 to infer dietary proportions from stable isotope values in tissue samples. Its main functions are simmr_load() and simmr_mcmc(), and it includes two vignettes for user guidance.

Use Cases

• Inferring dietary proportions of organisms based on stable isotope values from tissue samples.
• Modeling sediment mixing in environmental studies.
• Analyzing the composition of fatty acids using stable isotope mixing principles.

Strengths

• Designed as a direct replacement for the widely-used SIAR package, suggesting community adoption.
• Methods are based on two peer-reviewed papers from 2010 and 2013, providing a documented scientific foundation.
• Includes two vignettes offering a quick start and a full feature listing for user guidance.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Last update date is unknown; freshness unverified.

Provenance

Source

Emma Govan

Collection Method

Software package for statistical modeling.

Time Range

Methods based on papers from 2010 and 2013.

Freshness

Last updated date is unknown.

Geography

Not applicable for a software tool.