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Section: Ecology
Topic: Ecology, Population biology

Modeling Tick Populations: An Ecological Test Case for Gradient Boosted Trees

Manley, William1  ; Tran, Tam1 ; Prusinski, Melissa2 ; Brisson, Dustin1 
1 Department of Biology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
2 New York State Department of Health, Albany, New York, USA

10.24072/pcjournal.353 - Peer Community Journal, Volume 3 (2023), article no. e116.

Get full text PDF Peer reviewed and recommended by PCI

General linear models have been the foundational statistical framework used to discover the ecological processes that explain the distribution and abundance of natural populations. Analyses of the rapidly expanding cache of environmental and ecological data, however, require advanced statistical methods to contend with complexities inherent to extremely large natural data sets. Modern machine learning frameworks such as gradient boosted trees efficiently identify complex ecological relationships in massive data sets, which are expected to result in accurate predictions of the distribution and abundance of organisms in nature. However, rigorous assessments of the theoretical advantages of these methodologies on natural data sets are rare. Here we compare the abilities of gradient boosted and linear models to identify environmental features that explain observed variations in the distribution and abundance of blacklegged tick (Ixodes scapularis) populations in a data set collected across New York State over a ten-year period. The gradient boosted and linear models use similar environmental features to explain tick demography, although the gradient boosted models found non-linear relationships and interactions that are difficult to anticipate and often impractical to identify with a linear modeling framework. Further, the gradient boosted models predicted the distribution and abundance of ticks in years and areas beyond the training data with much greater accuracy than their linear model counterparts. The flexible gradient boosting framework also permitted additional model types that provide practical advantages for tick surveillance and public health. The results highlight the potential of gradient boosted models to discover novel ecological phenomena affecting pathogen demography and as a powerful public health tool to mitigate disease risks.

Published online:
DOI: 10.24072/pcjournal.353
Type: Research article
Keywords: Ticks; Lyme Disease; Ecology; Statistical Ecology; Species Distribution Modeling; Machine Learning
Manley, William 1; Tran, Tam 1; Prusinski, Melissa 2; Brisson, Dustin 1

1 Department of Biology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
2 New York State Department of Health, Albany, New York, USA
License: CC-BY 4.0
Copyrights: The authors retain unrestricted copyrights and publishing rights 
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Manley, William; Tran, Tam; Prusinski, Melissa; Brisson, Dustin. Modeling Tick Populations: An Ecological Test Case for Gradient Boosted Trees. Peer Community Journal, Volume 3 (2023), article  no. e116. doi : 10.24072/pcjournal.353. https://peercommunityjournal.org/articles/10.24072/pcjournal.353/

Peer reviewed and recommended by PCI : 10.24072/pci.ecology.100532

Conflict of interest of the recommender and peer reviewers:
The recommender in charge of the evaluation of the article and the reviewers declared that they have no conflict of interest (as defined in the code of conduct of PCI) with the authors or with the content of the article.

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