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- W2014199505 abstract "MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 463:205-214 (2012) - DOI: https://doi.org/10.3354/meps09847 Trait and abundance patterns in two marine molluscs: the influence of abiotic conditions operating across multiple spatial scales Hannah B. Lloyd*, Brad R. Murray, Paul E. Gribben Plant Functional Biology and Climate Change Cluster, School of the Environment, University of Technology Sydney, Broadway, New South Wales 2007, Australia *Email: hannah.lloyd@uts.edu.au ABSTRACT: Theoretical mechanisms describing species abundance distributions should also underpin geographic variation in life-history traits. However, recent studies suggest that abundance and trait patterns may not co-vary and may respond differently to abiotic conditions acting at different spatial scales. We examined patterns in abundance and body size of 2 estuarine molluscs, the arkshell Anadara trapezia and the mudsnail Batillaria australis, across their wide distributions in eastern Australia. We related abundance and body size patterns to abiotic variables including water temperature, pH, salinity, sediment redox and dissolved oxygen content at multiple spatial scales. Two hypotheses were tested: (1) geographic patterns in abundance and body size do not co-vary, and (2) patterns in abundance are more strongly influenced by abiotic conditions occurring at a large spatial scale (e.g. across latitudinal gradients) whereas body size is more strongly influenced by variation in abiotic conditions occurring at smaller scales. The influence of spatial scale and associated abiotic variables on abundance and body size distributions was determined using multiple linear regression, ANOVA and variance component analyses. Geographic variation in abundance and body size were independent of each other in both species. Abiotic variation across latitudinal gradients was the strongest predictor of abundance, but factors that varied substantially at local scales (e.g. dissolved oxygen and sediment redox) were the strongest predictors of body size. Our data indicate that geographic patterns in body size and abundance can be disconnected from each other, most likely due to differential responses to abiotic variation acting at different spatial scales. KEY WORDS: Biogeography · Spatial scale · Abiotic variation · Abundance · Body size · Anadara trapezia · Batillaria australis Full text in pdf format PreviousNextCite this article as: Lloyd HB, Murray BR, Gribben PE (2012) Trait and abundance patterns in two marine molluscs: the influence of abiotic conditions operating across multiple spatial scales. Mar Ecol Prog Ser 463:205-214. https://doi.org/10.3354/meps09847 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 463. Online publication date: August 30, 2012 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2012 Inter-Research." @default.
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