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Scale-dependent relationships between benthic habitat characteristics and abundances of blacklip abalone, Haliotis rubra (Leach)

Citation

Strain, EMA and Johnson, CR, Scale-dependent relationships between benthic habitat characteristics and abundances of blacklip abalone, Haliotis rubra (Leach), Marine and Freshwater Research, 61, (11) pp. 1227-1236. ISSN 1323-1650 (2010) [Refereed Article]


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Copyright Statement

Copyright 2010 CSIRO

Official URL: http://www.publish.csiro.au/paper/MF09211.htm

DOI: doi:10.1071/MF09211

Abstract

Habitat characteristics can influence marine herbivore densities at a range of spatial scales. We examined the relationship between benthic habitat characteristics and adult blacklip abalone (Haliotis rubra) densities across local scales (0.062516 m2), at 2 depths, 4 sites and 2 locations, in Tasmania, Australia. Biotic characteristics that were highly correlated with abalone densities included cover of non-calcareous encrusting red algae (NERA), non-geniculate coralline algae (NCA), a matrix of filamentous algae and sediment, sessile invertebrates, and foliose red algae. The precision of relationships varied with spatial scale. At smaller scales (0.06250.25 m2), there was a positive relationship between NERA and ERA, and negative relationships between sediment matrix, sessile invertebrates and abalone densities. At the largest scale (16 m2), there was a positive relationship between NERA and abalone densities. Thus, for some biotic characteristics, the relationship between NERA and abalone densities may be scalable. There was very little variability between depths and sites; however, the optimal spatial scale differed between locations. Our results suggest a dynamic interplay between the behavioural responses of H. rubra to microhabitat and/or to abalone maintaining NERA free of algae, sediment, and sessile invertebrates. This approach could be used to describe the relationship between habitat characteristics and species densities at the optimal spatial scales.

Item Details

Item Type:Refereed Article
Keywords:correlation, H. rubra, percentage cover, quantile regression, scale-dependent.
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Marine and Estuarine Ecology (incl. Marine Ichthyology)
Objective Division:Environment
Objective Group:Flora, Fauna and Biodiversity
Objective Field:Marine Flora, Fauna and Biodiversity
Author:Strain, EMA (Dr Beth Strain)
Author:Johnson, CR (Professor Craig Johnson)
ID Code:65932
Year Published:2010
Web of Science® Times Cited:6
Deposited By:Zoology
Deposited On:2010-12-09
Last Modified:2011-05-10
Downloads:1 View Download Statistics

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