Radiocarbon dating and wood density chronologies of mangrove trees in arid Western Australia

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dc.contributor.authorSantini, NSen_AU
dc.contributor.authorHua, Qen_AU
dc.contributor.authorSchmitz, Nen_AU
dc.contributor.authorLovelock, CEen_AU
dc.date.accessioned2014-04-24T05:59:49Zen_AU
dc.date.available2014-04-24T05:59:49Zen_AU
dc.date.issued2013-11-12en_AU
dc.date.statistics2014-04-24en_AU
dc.description.abstractMangrove trees tend to be larger and mangrove communities more diverse in tropical latitudes, particularly where there is high rainfall. Variation in the structure, growth and productivity of mangrove forests over climatic gradients suggests they are sensitive to variations in climate, but evidence of changes in the structure and growth of mangrove trees in response to climatic variation is scarce. Bomb-pulse radiocarbon dating provides accurate dates of recent wood formation and tree age of tropical and subtropical tree species. Here, we used radiocarbon techniques combined with X-ray densitometry to develop a wood density chronology for the mangrove Avicennia marina in the Exmouth Gulf, Western Australia (WA). We tested whether wood density chronologies of A. marina were sensitive to variation in the Pacific Decadal Oscillation Index, which reflects temperature fluctuations in the Pacific Ocean and is linked to the instrumental rainfall record in north WA. We also determined growth rates in mangrove trees from the Exmouth Gulf, WA. We found that seaward fringing A. marina trees (similar to 10 cm diameter) were 48 +/- 1 to 89 +/- 23 years old (mean +/- 1 sigma) and that their growth rates ranged from 4.08 +/- 2.36 to 5.30 +/- 3.33 mm/yr (mean +/- 1 sigma). The wood density of our studied mangrove trees decreased with increases in the Pacific Decadal Oscillation Index. Future predicted drying of the region will likely lead to further reductions in wood density and their associated growth rates in mangrove forests in the region. © 2013 Santini et al.en_AU
dc.identifier.articlenumbere80116en_AU
dc.identifier.citationSantini, N. S., Hua, Q., Schmitz. N., & Lovelock, C. E. (2013). Radiocarbon dating and wood density chronologies of mangrove trees in arid Western Australia. PloS one, 8(11), e80116. doi:10.1371/journal.pone.0080116en_AU
dc.identifier.govdoc5251en_AU
dc.identifier.issn1932-6203en_AU
dc.identifier.issue11en_AU
dc.identifier.journaltitlePloS oneen_AU
dc.identifier.urihttp://dx.doi.org/10.1371/journal.pone.0080116en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/5489en_AU
dc.identifier.volume8en_AU
dc.language.isoenen_AU
dc.publisherPublic Library of Scienceen_AU
dc.subjectCarbon 14en_AU
dc.subjectWooden_AU
dc.subjectTreesen_AU
dc.subjectMangrovesen_AU
dc.subjectArid landsen_AU
dc.subjectWestern Australiaen_AU
dc.titleRadiocarbon dating and wood density chronologies of mangrove trees in arid Western Australiaen_AU
dc.typeJournal Articleen_AU
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