Graph showing a population time series for pocket mice. Date on the x axis, number of pocket mice on the y axis, and oscillating time-series relationship with a year of foreast dynamics at the end

The portalcasting package provides a model development, deployment, and evaluation system for forecasting how ecological systems change through time, with a focus on a widely used long-term study of mammal population and community dynamics, the Portal Project. It combines the Portal Data Repository and portalr data management package in a pipeline to automate weekly forecasting. Forecasts are archived on GitHub and Zenodo. The Portal Forecasting website provides a dynamic view of the results.