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dc.contributor.authorLucrezi, Serena
dc.date.accessioned2017-03-23T09:05:44Z
dc.date.available2017-03-23T09:05:44Z
dc.date.issued2015
dc.identifier.citationLucrezi, S. 2015. Ghost crab populations respond to changing morphodynamic and habitat properties on sandy beaches. Acta Oecologica, 62:18–32. [http://dx.doi.org/10.1016/j.actao.2014.11.004]en_US
dc.identifier.issn1146–609X
dc.identifier.issn1873–6238 (Online)
dc.identifier.urihttp://hdl.handle.net/10394/20903
dc.identifier.urihttp://dx.doi.org/10.1016/j.actao.2014.11.004
dc.description.abstractThe morphodynamic state and habitat properties of microtidal sandy beaches largely account for variations in macrofauna structure. In ecological theory, the habitat harshness hypothesis and the habitat safety hypothesis explain variations in macrofauna populations of the intertidal and supratidal zones of sandy beaches. The former hypothesis states that intertidal macrofauna should increase from reflective to dissipative beaches. The latter hypothesis supports the idea that supratidal species are more successful on reflective beaches, given their relative independence from the swash. However, trends in abundance of supratidal species, particularly crustaceans, have been unclear and further investigation is therefore needed. This study tested the two hypotheses on the largest invertebrate intertidal-to-supratidal crustacean on sandy beaches, namely the ghost crab (genus Ocypode). Variations in ghost crab burrow density, abundance, size and across-shore distribution were measured on four warm-temperate microtidal sandy beaches in KwaZulu-Natal, South Africa. Burrow numbers increased with beach morphodynamic state, while average burrow size decreased. The steepest, narrowest and most inundationprone beach represented the least hospitable environment for the ghost crabs. The results that are reported here tend to support the habitat harshness hypothesis. However, the relevance of i) individual physical variables, ii) tidal action, and iii) the ecology of various species, in shaping ghost crab population dynamics, is also discussed. The results contribute to the knowledge regarding population dynamics of intertidal and supratidal crustaceans across beach types.en_US
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.subjectSandy beachen_US
dc.subjectGhost craben_US
dc.subjectBurrow densityen_US
dc.subjectAbundanceen_US
dc.subjectSizeen_US
dc.subjectDistributionen_US
dc.subjectMorphodynamic stateen_US
dc.titleGhost crab populations respond to changing morphodynamic and habitat properties on sandy beachesen_US
dc.typeArticleen_US
dc.contributor.researchID23952997 - Lucrezi, Serena


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