The current and future uses of machine learning in ecosystem service research

A - Papers appearing in refereed journals

Scowen, M., Athanasiadis, I. N., Bullock, J. M., Eigenbrod, F. and Willcock, S. 2021. The current and future uses of machine learning in ecosystem service research. Science of the Total Environment. 799, p. 149263. https://doi.org/10.1016/j.scitotenv.2021.149263

AuthorsScowen, M., Athanasiadis, I. N., Bullock, J. M., Eigenbrod, F. and Willcock, S.
Abstract

Machine learning (ML) expands traditional data analysis and presents a range of opportunities in ecosystem service (ES) research, offering rapid processing of ‘big data’ and enabling significant advances in data description and predictive modelling. Descriptive ML techniques group data with little or no prior domain specific assumptions; they can generate hypotheses and automatically sort data prior to other analyses. Predictive ML techniques allow for the predictive modelling of highly non-linear systems where casual mechanisms are poorly understood, as is often the case for ES. We conducted a review to explore how ML is used in ES research and to identify and quantify trends in the different ML approaches that are used. We reviewed 308 peer-reviewed publications and identified that ES studies implemented machine learning techniques in data description (64%; n = 308) and predictive modelling (44%), with some papers containing both categories. Classification and Regression Trees were the most popular techniques (60%), but unsupervised learning techniques were also used for descriptive tasks such as clustering to group or split data without prior assumptions (19%). Whilst there are examples of ES publications that apply ML with rigour, many studies do not have robust or repeatable methods. Some studies fail to report model settings (43%) or software used (28%), and many studies do not report carrying out any form of model hyperparameter tuning (67%) or test model generalisability (59%). Whilst studies use ML to analyse very large and complex datasets, ES research is generally not taking full advantage of the capacity of ML to model big data (1138 medium number of data points; 13 median quantity of variables). There is great further opportunity to utilise ML in ES research, to make better use of big data and to develop detailed modelling of spatial-temporal dynamics that meet stakeholder demands.

KeywordsMachine learning; Big data; Methodology; Validation; Data driven modelling; Ecosystem services
Year of Publication2021
JournalScience of the Total Environment
Journal citation799, p. 149263
Digital Object Identifier (DOI)https://doi.org/10.1016/j.scitotenv.2021.149263
Web address (URL)https://www.sciencedirect.com/science/article/pii/S0048969721043369
Open accessPublished as green open access
FunderNatural Environment Research Council
Output statusPublished
Publication dates
Online27 Jul 2021
Publication process dates
Accepted22 Jul 2021
PublisherElsevier Science Bv
ISSN0048-9697

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