Authors / CoAuthors
Ali Jalali, M. | Ierodiaconou, D. | Young, M. | Huang, Z.
Abstract
Spatially explicit predictive models of species distributions integrating fine quality habitat descriptors and species information have the potential to provide new insights into species-habitat associations and their range shifts. This study describes the distributions and interactions of two commercial marine macro-invertebrates blacklip abalone Haliotis rubra and black urchin Centrostephanus rodgersii along the coast of Victoria, Australia. A generalized linear modelling (GLM) was used to model current and future (IPCC scenario for the year 2100) occurrence and abundance of these benthic species by analyzing associations between observations from fisheries independent diver surveys and environmental variables from bathymetric light detection and ranging (LiDAR) derivatives and oceanographic parameters. Species spatial patterns were also evaluated in relation to observed macro-algae biota. The predictive GLM was suitable to predict species responses to environmental gradients with reef complexity , sea surface temperature (SST) and chlorophyll a (Chl a) influential predictors strongly associated with species distributions. H. rubra abundance showed a negative association with summer SST, conversely, the distribution of C. rodgersii showed positive responses to increasing winter SST. Furthermore, high abundance of H. rubra was associated with dense brown macro-algae whereas areas in high C. rodgersii densities were relatively devoid of algal assemblages and were low in abalone abundance. The modelling for the year 2100 predict a south-westward range extensions of urchin C. rodgersii, in response to increased ocean temperatures and the potential conflict with existing abalone commercial fishing grounds is discussed.
Product Type
nonGeographicDataset
eCat Id
83947
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Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
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Keywords
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- External PublicationArticle
- Australian and New Zealand Standard Research Classification (ANZSRC)
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- Ecology
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- Published_Internal
Publication Date
2015-01-01T00:00:00
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Topic Category
oceans
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I am a minor contributor and co-author to this paper.
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Spatial Resolution
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Deakin university led this study. NERP Marine Hub had minor contribution.