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

Santini, Nadia S., Hua, Quan, Schmitz, Nele and Lovelock, Catherine E. (2013) Radiocarbon dating and wood density chronologies of mangrove trees in arid Western Australia. PLoS One, 8 11: e80116.1-e80116.8. doi:10.1371/journal.pone.0080116


Author Santini, Nadia S.
Hua, Quan
Schmitz, Nele
Lovelock, Catherine E.
Title Radiocarbon dating and wood density chronologies of mangrove trees in arid Western Australia
Journal name PLoS One   Check publisher's open access policy
ISSN 1932-6203
Publication date 2013-11
Sub-type Article (original research)
DOI 10.1371/journal.pone.0080116
Open Access Status DOI
Volume 8
Issue 11
Start page e80116.1
End page e80116.8
Total pages 8
Place of publication San Francisco, CA, United States
Publisher Public Library of Science
Collection year 2014
Language eng
Formatted abstract
Mangrove 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 (~10 cm diameter) were 48±1 to 89±23 years old (mean ± 1σ) and that their growth rates ranged from 4.08±2.36 to 5.30±3.33 mm/yr (mean ±1σ). 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.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2014 Collection
School of Biological Sciences Publications
 
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