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Abundance Of Tesseropora Rosea At The Margins Of Its Biogeographic Range Is Closely Linked To Recruitment, But Not Fecundity, Eszter Z. Hidas, Kenneth G. Russell, David J. Ayre, Todd E. Minchinton

Faculty of Science, Medicine and Health - Papers: part A

For benthic marine invertebrates with planktonic larvae, adult abundance at the species' range limit may depend on local fecundity, and recruitment from central, source populations. We tested the importance of these processes using a hierarchical design at multiple spatial scales (from tens to hundreds of kilometres) to assess relationships between patterns of adult abundance, fecundity and recruitment in the rocky intertidal barnacle Tesseropora rosea, approaching its geographical range limit on the southeast coast of Australia. Across the 600 km region, adult abundance, recruitment and fecundity all declined towards the range limit, but only adult abundance and recruitment were positively correlated, …