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Do stingray feeding pits enhance intertidal macrobenthic biodiversity?

Published version
Peer-reviewed

Repository DOI


Change log

Authors

Cottrell, LG 

Abstract

jats:titleAbstract</jats:title>jats:pLittle is known of the macrobenthos supported within stingray feeding pits. Compared to adjacent unpitted areas during low tide, macrobenthic abundance and biodiversity within the stingray pits might be expected to be (i) jats:italicgreater</jats:italic>, the water-retaining pits functioning like rock pools; (ii) jats:italicno different</jats:italic>, since macrofaunal recolonisation can occur very rapidly; or (iii) jats:italicless</jats:italic>, consequent on the substratum changes that typify depressions in soft sediments. In both (i) and (iii) differences in composition of the supported assemblages would be expected, though not in (ii). To differentiate between these alternative hypotheses, faunal characteristics within intertidal stingray pits were compared to those in the adjacent background sandflat in Moreton Bay, Queensland, where the prey of the rays are the decapod crustaceans jats:italicTrypaea</jats:italic> and jats:italicMictyris</jats:italic> that otherwise structure the benthic system. Results generally (though not totally) support hypothesis (ii), it being consistently found that feeding pits supported less macrobenthic abundance than the surrounding sandflat but subequal taxon density, evenness and patchiness of their faunas, and their taxonomic compositions were very similar. Such feeding pits undoubtedly structure many intertidal sandflats and increase both their topographical complexity and their habitat diversity, but this is not reflected in increased macrobenthic biodiversity.</jats:p>

Description

Acknowledgements: We are indebted to the Quandamooka Yoolooburrabee Aboriginal Corporation and the Quandamooka Aboriginal Land and Sea Management Agency for permission to carry out field research within the native title area of the Quandamooka People and to the Queensland Parks and Wildlife Service for permission to sample in a Habitat Protection Zone of the Moreton Bay Marine Park under permit MPP19-002133. The study was conducted from the Moreton Bay Research Station, Dunwich, and we are most grateful to its staff especially Kevin Townsend and Martin Wynne for their hospitality and support.

Keywords

41 Environmental Sciences, 31 Biological Sciences, 3103 Ecology, 15 Life on Land

Journal Title

Hydrobiologia

Conference Name

Journal ISSN

0018-8158
1573-5117

Volume Title

851

Publisher

Springer Science and Business Media LLC
Sponsorship
None