Plant families exhibit unique geographic trends in C4 richness and cover in Australia

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dc.contributor.authorMunroe, S.E.M.
dc.contributor.authorMcInerney, F.A.
dc.contributor.authorGuerin, G.R.
dc.contributor.authorAndrae, J.W.
dc.contributor.authorWelti, N.
dc.contributor.authorCaddy-Retalic, S.
dc.contributor.authorAtkins, R.
dc.contributor.authorSparrow, B.
dc.contributor.editorZhu, Y.
dc.date.issued2022
dc.description.abstractNumerous studies have analysed the relationship between C4 plant cover and climate. However, few have examined how different C4 taxa vary in their response to climate, or how environmental factors alter C4:C3 abundance. Here we investigate (a) how proportional C4 plant cover and richness (relative to C3) responds to changes in climate and local environmental factors, and (b) if this response is consistent among families. Proportional cover and richness of C4 species were determined at 541 one-hectare plots across Australia for 14 families. C4 cover and richness of the most common and abundant families were regressed against climate and local parameters. C4 richness and cover in the monocot families Poaceae and Cyperaceae increased with latitude and were strongly positively correlated with January temperatures, however C4 Cyperaceae occupied a more restricted temperature range. Seasonal rainfall, soil pH, soil texture, and tree cover modified proportional C4 cover in both families. Eudicot families displayed considerable variation in C4 distribution patterns. Proportional C4 Euphorbiaceae richness and cover were negatively correlated with increased moisture availability (i.e. high rainfall and low aridity), indicating they were more common in dry environments. Proportional C4 Chenopodiaceae richness and cover were weakly correlated with climate and local environmental factors, including soil texture. However, the explanatory power of C4 Chenopodiaceae models were poor, suggesting none of the factors considered in this study strongly influenced Chenopodiaceae distribution. Proportional C4 richness and cover in Aizoaceae, Amaranthaceae, and Portulacaceae increased with latitude, suggesting C4 cover and richness in these families increased with temperature and summer rainfall, but sample size was insufficient for regression analysis. Results demonstrate the unique relationships between different C4 taxa and climate, and the significant modifying effects of environmental factors on C4 distribution. Our work also revealed C4 families will not exhibit similar responses to local perturbations or climate.
dc.description.statementofresponsibilitySamantha E. M. MunroeID, Francesca A. McInerney, Greg R. Guerin, Jake W. Andrae, Nina WeltiID, Stefan Caddy-Retalic, Rachel Atkins, Ben Sparrow
dc.identifier.citationPLoS ONE, 2022; 17(8):e0271603-1-e0271603-21
dc.identifier.doi10.1371/journal.pone.0271603
dc.identifier.issn1932-6203
dc.identifier.issn1932-6203
dc.identifier.orcidMunroe, S.E.M. [0000-0001-7827-1028]
dc.identifier.orcidMcInerney, F.A. [0000-0002-2020-6650]
dc.identifier.orcidGuerin, G.R. [0000-0002-2104-6695]
dc.identifier.orcidCaddy-Retalic, S. [0000-0003-4870-4202]
dc.identifier.orcidAtkins, R. [0000-0003-0953-3420]
dc.identifier.orcidSparrow, B. [0000-0003-2566-1895]
dc.identifier.urihttps://hdl.handle.net/2440/136378
dc.language.isoen
dc.publisherPublic Library of Science (PLoS)
dc.relation.granthttp://purl.org/au-research/grants/arc/FT110100100793
dc.rights© 2022 Munroe et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
dc.source.urihttps://doi.org/10.1371/journal.pone.0271603
dc.subjectPlants
dc.subjectChenopodiaceae
dc.subjectPoaceae
dc.subjectSoil
dc.subjectEcosystem
dc.subjectBiodiversity
dc.subjectClimate
dc.subject.meshPlants
dc.subject.meshChenopodiaceae
dc.subject.meshPoaceae
dc.subject.meshSoil
dc.subject.meshEcosystem
dc.subject.meshBiodiversity
dc.subject.meshClimate
dc.titlePlant families exhibit unique geographic trends in C4 richness and cover in Australia
dc.typeJournal article
pubs.publication-statusPublished

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