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

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

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

STAN_lm_template.stan - Provides a basic linear model with the structure of y = mx + b.
STAN_lm_prepost_template.stan - Splits observations into pre- and post-fire and estimates CQ slopes before and after.
STAN_lm_delta_template.stan - Uses pre- and post-fire CQ slopes to calculate delta, the change in slopes, as a derived variable.
STAN_lm_delta_unified_template.stan - Unifies model structure to estimate all parameters in a single model structure, both pre- and post-fire.
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.