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Can’t see the random forest for the decision trees: selecting predictive models for restoration ecology

Author(s): David M Barnard, Matthew J. Germino, David S. Pilliod, Robert S. Arkle, Cara Applestein, Bill E. Davidson, Matthew R. Fisk
Year Published: 2019

Improving predictions of restoration outcomes is increasingly important to resource managers for accountability and adaptive management, yet there is limited guidance for selecting a predictive model from the multitude available. The goal of this paper was to identify an optimal predictive framework for restoration ecology using eleven modeling frameworks (including, machine learning, inferential, and ensemble approaches), and three data groups (field data, geographic data [GIS], and a combination thereof). We test this approach with a dataset from a large post‐fire sagebrush reestablishment project in the Great Basin, USA. Predictive power varied among models and data groups, ranging from 58‐79% accuracy. Finer scale field data generally had the greatest predictive power, although GIS data were present in the best models overall. An ensemble prediction computed from the ten models parameterized to field data was well above average for accuracy but was outperformed by others that prioritized model parsimony by selecting predictor variables based on rankings of their importance among all candidate models. The variation in predictive power among a suite of modeling frameworks underscores the importance of a model comparison and refinement approach that evaluates multiple models and data groups, and selects variables based on their contribution to predictive power. The enhanced understanding of factors influencing restoration outcomes accomplished by this framework has the potential to aid the adaptive management process for improving future restoration outcomes.

Citation: Barnard DM, Germino MJ, Pilliod DS, Arkle RS, Applestein C, Davidson BE, Fisk MR. 2019. Can’t see the random forest for the decision trees: selecting predictive models for restoration ecology. Restoration Ecology, first acceptance online (February 2019). https://doi.org/10.1111/rec.12938
Topic(s): Recovery after fire, Restoration
Ecosystem(s): None
Document Type: Book or Chapter or Journal Article
NRFSN number: 18952
Record updated: Feb 27, 2019