Quantifying interactive effects of fire and precipitation regimes on catchment biogeochemistry of aridlands

Project Summary

PIs:

• Tamara Harms, Associate Professor, Department of Biology & Wildlife and Institute of Arctic Biology, University of Alaska Fairbanks
• Heili Lowman, Department of Natural Resources and Environmental Science, University of Nevada, Reno
• Stevan Earl, Information Manager for the Central Arizona-Phoenix Long-Term Ecological Research (CAP LTER) project

Script Explanations

• In the models folder, the following STAN scripts are available for progressively built out model structures:

1. STAN_lm_template.stan - Provides a basic linear model with the structure of y = mx + b.
2. STAN_lm_prepost_template.stan - Splits observations into pre- and post-fire and estimates CQ slopes before and after.
3. STAN_lm_delta_template.stan - Uses pre- and post-fire CQ slopes to calculate delta, the change in slopes, as a derived variable.
4. STAN_lm_delta_unified_template.stan - Unifies model structure to estimate all parameters in a single model structure, both pre- and post-fire.
5. STAN_lm_hierarchical_template.stan - Estimates all parameters in a hierarchical structure (at site- and universal-level). UNDER DEVELOPMENT

• In the model_fitting folder, the STAN_dev_script.R works through prepping data and fitting all the model structures above.

Related Repositories

• hlowman / crass_bgc