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Influence of artefacts in marine digital terrain models on habitat maps and species distribution models : a multiscale assessment

Lecours Vincent, Devillers Rodolphe, Edinger Evan N., Brown Craig J. et Lucieer Vanessa L.. (2017). Influence of artefacts in marine digital terrain models on habitat maps and species distribution models : a multiscale assessment. Remote Sensing in Ecology and Conservation, 3, (4), p. 232-246.

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URL officielle: http://dx.doi.org/doi:10.1002/rse2.49

Résumé

Remote sensing techniques are currently the main methods providing elevation data used to produce Digital Terrain Models ( DTM ). Terrain attributes ( e.g . slope, orientation, rugosity) derived from DTM s are commonly used as surrogates of species or habitat distribution in ecological studies. While DTM s’ errors are known to propagate to terrain attributes, their impact on ecological analyses is however rarely documented. This study assessed the impact of data acquisition artefacts on habitat maps and species distribution models. DTM s of German Bank (off Nova Scotia, Canada) at five different spatial scales were altered to artificially introduce different levels of common data acquisition artefacts. These data were used in 615 unsupervised classifications to map potential habitat types based on biophysical characteristics of the area, and in 615 supervised classifications (MaxEnt) to predict sea scallop distribution across the area. Differences between maps and models built from altered data and reference maps and models were assessed. Roll artefacts decreased map accuracy (up to 14% lower) and artificially increased models’ performances. Impacts from other types of artefacts were not consistent, either decreasing or increasing accuracy and performance measures. The spatial distribution of habitats and spatial predictions of sea scallop distributions were always affected by data quality ( i.e . artefacts), spatial scale of the data, and the selection of variables used in the classifications. This research demonstrates the importance of these three factors in building a study design, and highlights the need for error quantification protocols that can assist when maps and models are used in decision‐making, for instance in conservation and management.

Type de document:Article publié dans une revue avec comité d'évaluation
ISSN:2056-3485
Volume:3
Numéro:4
Pages:p. 232-246
Version évaluée par les pairs:Oui
Date:18 Décembre 2017
Nombre de pages:15
Identifiant unique:10.1002/rse2.49
Sujets:Sciences naturelles et génie > Sciences naturelles > Biologie et autres sciences connexes
Sciences naturelles et génie > Sciences naturelles > Sciences de la terre (géologie, géographie)
Département, module, service et unité de recherche:Unités de recherche > Centre de recherche sur la Boréalie (CREB)
Départements et modules > Département des sciences humaines
Mots-clés:artefacts, error propagation, habitatmapping, multibeam bathymetry, species distribution model, terrain analysis
Déposé le:31 oct. 2023 14:21
Dernière modification:31 juill. 2024 15:46
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