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Model based grouping of species across environmental gradients


Dunstan, PK and Foster, SD and Darnell, R, Model based grouping of species across environmental gradients, Ecological Modelling, 222, (4) pp. 955-963. ISSN 0304-3800 (2011) [Refereed Article]

Copyright Statement

Crown Copyright 2010 Published by Elsevier B.V.

DOI: doi:10.1016/j.ecolmodel.2010.11.030


We present a novel approach to the statistical analysis and prediction of multispecies data. The approach allows the simultaneous grouping and quantification of multiple speciesí responses to environmental gradients. The underlying statistical model is a finite mixture model, where mixing is performed over the individual speciesí responses to environmental gradients. Species with similar responses are grouped with minimal information loss. We term these groups species archetypes. Each species archetype has an associated GLM that can be used to predict distributions with appropriate measures of uncertainty. Initially, we illustrate the concept and method using artificial data and then with application to real data comprising 200 species from the Great Barrier Reef (GBR) lagoon on 13 oceanographic and geological gradients from 12◦S to24◦S. The 200 species from the GBR are well represented by 15 species archetypes. The model is interpreted through maps of the probability of presence for a fine scale set of locations throughout the study area. Maps of uncertainty are also produced to provide statistical context. The presence of each species archetype was strongly influenced by oceanographic gradients, principally temperature, oxygen and salinity. The number of species in each group ranged from 4 to 34. The method has potential application to the analysis of multispecies distribution patterns and for multispecies management.

Item Details

Item Type:Refereed Article
Keywords:species archetype, finite mixture model, grouping, biodiversity, prediction
Research Division:Environmental Sciences
Research Group:Environmental management
Research Field:Conservation and biodiversity
Objective Division:Environmental Management
Objective Group:Marine systems and management
Objective Field:Marine biodiversity
UTAS Author:Dunstan, PK (Dr Piers Dunstan)
UTAS Author:Foster, SD (Dr Scott Foster)
ID Code:120266
Year Published:2011
Web of Science® Times Cited:71
Deposited By:Ecology and Biodiversity
Deposited On:2017-08-17
Last Modified:2017-09-27

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