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Gastropod communities associated with different morphologies of the intertidal seaweed Hormosira banksii


Gemelli, F and Johnson, CR and Wright, JT, Gastropod communities associated with different morphologies of the intertidal seaweed Hormosira banksii, Marine and Freshwater Research, 70, (2) pp. 280-291. ISSN 1323-1650 (2019) [Refereed Article]

Copyright Statement

Copyright 2018 the authors.

DOI: doi:10.1071/MF18159


Hormosira banksii is an important intertidal habitat-forming seaweed in southern Australia that shows large variation in morphology. We examined the relationship between morphological variation in Hormosira and associated gastropod community structure, abundance and diversity in Tasmania, southern Australia. We sampled both Hormosira and gastropods from sites in two habitats (coast and estuary), two times (February–March and October–November) at two regions (northern and eastern Tasmania). There were distinct Hormosira morphs on the north coast (small individuals), east coast (intermediate sized individuals) and in estuaries (large individuals). Multivariate analysis showed that gastropod communities varied among the different algal morphologies, and suggest an influence of morphological traits, specifically thallus length, vesicle number and size, on the distribution patterns of gastropod species. Despite the finding of distinct gastropod communities associated with the different Hormosira morphs, because the different morphs occur in different locations with different physical conditions, we cannot unequivocally attribute the differences in gastropod communities to seaweed morphology per se. Nonetheless, our results confirm that H. banksii is an important foundation species in the intertidal zone and suggest a habitat-specific effect of algal morphological traits on gastropods.

Item Details

Item Type:Refereed Article
Keywords:biodiversity, canopy-forming seaweed, community structure, ecosystem engineer, morphology
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Marine and estuarine ecology (incl. marine ichthyology)
Objective Division:Environmental Management
Objective Group:Terrestrial systems and management
Objective Field:Assessment and management of terrestrial ecosystems
UTAS Author:Gemelli, F (Ms Federica Gemelli)
UTAS Author:Johnson, CR (Professor Craig Johnson)
UTAS Author:Wright, JT (Associate Professor Jeffrey Wright)
ID Code:130579
Year Published:2019
Web of Science® Times Cited:4
Deposited By:Ecology and Biodiversity
Deposited On:2019-02-04
Last Modified:2020-01-06

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