globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.13277
论文题名:
Carbon isotope discrimination in leaves of the broad-leaved paperbark tree, Melaleuca quinquenervia, as a tool for quantifying past tropical and subtropical rainfall
作者: Tibby J.; Barr C.; McInerney F.A.; Henderson A.C.G.; Leng M.J.; Greenway M.; Marshall J.C.; McGregor G.B.; Tyler J.J.; McNeil V.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2016
卷: 22, 期:10
起始页码: 3474
结束页码: 3486
语种: 英语
英文关键词: carbon isotope ratios ; climate reconstruction ; CO 2 ; discrimination ; Holocene ; palaeoclimate ; wetlands
Scopus关键词: carbon dioxide ; carbon isotope ; discriminant analysis ; Holocene ; isotopic ratio ; leaf ; paleoclimate ; rainfall ; reconstruction ; tree ; wetland ; Australia ; Fraser Island ; New Caledonia [Melanesia] ; North Stradbroke Island ; Papua New Guinea ; Queensland ; Melaleuca quinquenervia
英文摘要: Quantitative reconstructions of terrestrial climate are highly sought after but rare, particularly in Australia. Carbon isotope discrimination in plant leaves (Δleaf) is an established indicator of past hydroclimate because the fractionation of carbon isotopes during photosynthesis is strongly influenced by water stress. Leaves of the evergreen tree Melaleuca quinquenervia have been recovered from the sediments of some perched lakes on North Stradbroke and Fraser Islands, south-east Queensland, eastern Australia. Here, we examine the potential for using M. quinquenervia ∆leaf as a tracer of past rainfall by analysing carbon isotope ratios (δ13C) of modern leaves. We firstly assess Δleaf variation at the leaf and stand scale and find no systematic pattern within leaves or between leaves due to their position on the tree. We then examine the relationships between climate and Δleaf for a 11-year time series of leaves collected in a litter tray. M. quinquenervia retains its leaves for 1–4 years; thus, cumulative average climate data are used. There is a significant relationship between annual mean ∆leaf and mean annual rainfall of the hydrological year for 1–4 years (i.e. 365–1460 days) prior to leaf fall (r2 = 0.64, P = 0.003, n = 11). This relationship is marginally improved by accounting for the effect of pCO2 on discrimination (r2 = 0.67, P = 0.002, n = 11). The correlation between rainfall and Δleaf, and the natural distribution of Melaleuca quinquenervia around wetlands of eastern Australia, Papua New Guinea and New Caledonia offers significant potential to infer past rainfall on a wide range of spatial and temporal scales. © 2016 John Wiley & Sons Ltd
资助项目: We thank the Minjerribah Moorgumpin elders, in particular Aunty Marg, for permission to undertake research on North Stradbroke Island. Joanna Blessing, Sarah Lindermann, Norbert Menke, Patrick Moss, Tim Page, Lynda Petherick, Peter Negus, Penny Rogers, Melanie Shaw, Bill Senior and Craig Sloss provided assistance in the field. We would also like to thank Paul Smith for all his assistance with our research on North Stradbroke Island and John Ferris for Brown Lake dissolved oxygen data. Christine Crothers drew Fig. a,b. Ross (Stan) Mitchell undertook the spatial analysis presented in Fig. Chris Kendrick undertook the isotope analyses. This manuscript was improved by the comments of two anonymous reviewers. This project was funded by Australian Research Council (ARC) grants LP34106364 (with co-investment from The Queensland Government and Sibelco Australia) and DP150103875, an ARC Future Fellowship (FT110100793) and Discovery Project (DP130104314) held by FAM and a University of Adelaide interdisciplinary research fund grant to FAM, JT, JJT and CB.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61290
Appears in Collections:影响、适应和脆弱性

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作者单位: Geography, Environment and Population, University of Adelaide, Adelaide, SA, Australia; Sprigg Geobiology Centre, University of Adelaide, Adelaide, SA, Australia; Department of Earth Sciences, University of Adelaide, Adelaide, SA, Australia; School of Geography, Politics & Sociology, Newcastle University, Newcastle upon Tyne, United Kingdom; NERC Isotope Geosciences Facilities, British Geological Survey, Keyworth Nottingham, United Kingdom; Centre for Environmental Geochemistry, University of Nottingham, Nottingham, United Kingdom; Griffith School of Engineering, Environmental Engineering, Griffith University, Brisbane, QLD, Australia; Queensland Department of Science, Information Technology and Innovation, Brisbane, QLD, Australia

Recommended Citation:
Tibby J.,Barr C.,McInerney F.A.,et al. Carbon isotope discrimination in leaves of the broad-leaved paperbark tree, Melaleuca quinquenervia, as a tool for quantifying past tropical and subtropical rainfall[J]. Global Change Biology,2016-01-01,22(10)
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