| DOI: | 10.1016/j.gloplacha.2014.05.010
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| 论文题名: | Environmental controls on stable isotope ratios in New Zealand Podocarpaceae: Implications for palaeoclimate reconstruction |
| 作者: | Brett M.J.; Baldini J.U.L.; Gröcke D.R.
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| ISSN: | 0921-8519
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| 出版年: | 2014
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| 卷: | 120 | | 起始页码: | 38
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| 结束页码: | 45
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| 语种: | 英语
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| 英文关键词: | Environment
; Leaves
; Modern analogue
; New Zealand
; Palaeoclimate
; Podocarps
; Stable isotopes
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| Scopus关键词: | Vegetation
; Environment
; Leaves
; Modern analogues
; New zealand
; Palaeoclimate
; Podocarps
; Stable isotopes
; Isotopes
; biome
; climate modeling
; coniferous tree
; dating method
; paleoclimate
; stable isotope
; New Zealand
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| 英文摘要: | Stable isotope ratios of various proxies are widely used for palaeoclimate reconstruction, and it is often assumed that isotope ratios reflect vegetation abundance or type. However, very little research exists on the isotopic equilibration of extant biomes under variable environmental conditions. In this study, carbon and oxygen isotope ratios from leaves of various Podocarpaceae genera, endemic to New Zealand, are linked to environmental parameters from the Land Environments New Zealand model. The dominant influence on stable isotope ratios within the majority of Podocarpaceae studied here is vapour pressure deficit (VPD). A simple latitudinal trend does not exist, and neither temperature nor rainfall (decoupled from VPD) controls the stable isotope ratios. The results suggest that modern spatial heterogeneity in VPD affects the stable isotope values of vegetation, and that historic VPD variability would change the stable isotope ratios of Podocarpaceae without necessitating a change in vegetation type, density, or productivity. This represents an alternative model for temporal isotope change within geochemical proxies and reinforces the need for increased stable isotopic research in modern plant ecosystems to better understand modern, and eventually palaeoclimatic processes affecting the terrestrial biosphere. © 2014 Elsevier B.V. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84902578979&doi=10.1016%2fj.gloplacha.2014.05.010&partnerID=40&md5=be2664f1fac95d95d2c81aeb64b82b83
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/11425
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| Appears in Collections: | 全球变化的国际研究计划
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作者单位: | Department of Earth Sciences, Royal Holloway, University of London, London TW20 0EX, United Kingdom
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| Recommended Citation: | |
Brett M.J.,Baldini J.U.L.,Gröcke D.R.. Environmental controls on stable isotope ratios in New Zealand Podocarpaceae: Implications for palaeoclimate reconstruction[J],2014-01-01,120.
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