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Published (Version of record)CC BY V4.0, Open Access
Published (Version of record)CC BY V4.0, Open
Journal article
Harnessing Multiscale Topographic Environmental Variables for Regional Coral Species Distribution Models
Ecology and evolution, Vol.15(4), pp.1-21
04/2025
PMID: 40270802
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Abstract
Effective biodiversity conservation requires knowledge of species' distributions across large areas, yet prevalence data for marine sessile species is scarce, with traditional variables often unavailable at appropriate temporal and spatial resolutions. As marine organism distributions generally depend on terrain heterogeneity, topographic variables derived from digital elevation models (DEMs) can be useful proxies in ecological modelling, given appropriate spatial resolutions. Here, we use three reef‐building Acropora coral species across the Great Barrier Reef, Australia, in a case study to (1) assess high‐resolution bathymetry DEM sources for accuracy, (2) harness their derived topographic variables for regional coral species distribution models (SDMs), and (3) develop a transferable framework to produce, select and integrate multi‐resolution variables into marine spatial models. For this, we obtained and processed three distinct bathymetric digital depth models that we treat as DEMs, which are available across the GBR extent: (i) Allen Coral Atlas (ACA) at 10 m, (ii) DeepReef at 30 m and (iii) DeepReef at 100 m. We generalised the three DEMs to multiple nested spatial resolutions (15 m–120 m) and derived the same eight topographic variables to assess SDM sensitivity to bathymetry source and spatial resolution. The ACA and DeepReef DEMs shared similar vertical accuracies, each producing topographic variables relevant to marine SDMs. Slope and vector ruggedness measure (VRM), capturing hydrodynamic movement and shelter or exposure, were the most relevant variables in SDMs of all three species. Interestingly, variables at the finest resolution (15 m) were not always the most relevant for producing accurate coral SDMs, with optimal resolutions between 15 and 60 m depending on the variable type and species. Using multi‐resolution topographic variables in SDMs provided nuanced insights into the multiscale drivers of regional coral distributions. Drawing from this case study, we provide a practical and transferable framework to facilitate the adoption of multiscale SDMs for better‐informed conservation and management planning.
Details
- Title
- Harnessing Multiscale Topographic Environmental Variables for Regional Coral Species Distribution Models
- Creators
- Annie S. Guillaume - École Polytechnique Fédérale de LausanneRenata Ferrari - Australian Institute of Marine ScienceOliver Selmoni - Carnegie Institution for ScienceVéronique J. L. Mocellin - Australian Institute of Marine ScienceHugo Denis - UMR250/9220 ENTROPIE (France, New Caledonia)Melissa Naugle - Southern Cross UniversityEmily Howells - Southern Cross UniversityLine K. Bay - Australian Institute of Marine ScienceStéphane Joost - École Polytechnique Fédérale de Lausanne
- Publication Details
- Ecology and evolution, Vol.15(4), pp.1-21
- Publisher
- British Ecological Society and John Wiley & Sons Ltd.
- Number of pages
- 21
- Grant note
- This work was supported by the Great Barrier Reef Foundation; the Australian Government's Reef Trust; École Polytechnique Fédérale de Lausanne, Doc.Mobility grant.
- Identifiers
- 991013278604102368
- Copyright
- © 2025 The Author(s)
- Academic Unit
- Faculty of Science and Engineering; National Marine Science Centre
- Language
- English
- Resource Type
- Journal article