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Hierarchical generalized additive models in ecology: an introduction with mgcv

Open access
Pedersen, Eric J., Miller, David L., Simpson, Gavin L., Ross, Noam·2019·PeerJ

Abstract

In this paper, we discuss an extension to two popular approaches to modeling complex structures in ecological data: the generalized additive model (GAM) and the hierarchical model (HGLM). The hierarchical GAM (HGAM), allows modeling of nonlinear functional relationships between covariates and outcomes where the shape of the function itself varies between different grouping levels. We describe the theoretical connection between HGAMs, HGLMs, and GAMs, explain how to model different assumptions about the degree of intergroup variability in functional response, and show how HGAMs can be readily fitted using existing GAM software, the mgcv package in R. We also discuss computational and statistical issues with fitting these models, and demonstrate how to fit HGAMs on example data. All code and data used to generate this paper are available at: github.com/eric-pedersen/mixed-effect-gams .

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Metadata

Authors
Pedersen, E. J., Miller, D. L., Simpson, G. L., & Ross, N.
Venue
PeerJ
Publisher
PeerJ
Published
2019-05-27
Volume
7
Pages
e6876
ISSN
2167-8359 (ISSN-L)
OpenAlex
W2947802409
Cited by
1,193
References
49
FWCI
64.69
Type
journal article
Language
en
Open access
gold

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CoChat. (2026). Citation check: Hierarchical generalized additive models in ecology: an introduction with mgcv. https://app.cochat.ai/papers/10.7717/peerj.6876
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Pedersen, E. J., Miller, D. L., Simpson, G. L., & Ross, N. (2019). Hierarchical generalized additive models in ecology: an introduction with mgcv. PeerJ. https://doi.org/10.7717/peerj.6876

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

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