Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.gca.2012.09.004 |
Leaf water deuterium enrichment shapes leaf wax n-alkane delta D values of angiosperm plants II: Observational evidence and global implications | |
Kahmen, Ansgar1,2; Hoffmann, Bernd3; Schefuss, Enno4; Arndt, Stefan K.2; Cernusak, Lucas A.5; West, Jason B.6; Sachse, Dirk3 | |
通讯作者 | Kahmen, Ansgar |
来源期刊 | GEOCHIMICA ET COSMOCHIMICA ACTA |
ISSN | 0016-7037 |
EISSN | 1872-9533 |
出版年 | 2013 |
卷号 | 111页码:50-63 |
英文摘要 | Leaf wax n-alkanes are long-chain hydrocarbons that can persist in sedimentary records over geological timescales. Since their hydrogen isotopic composition (expressed as a delta D value) can be correlated to the delta D values of precipitation, leaf wax n-alkane delta D values have been advocated as new and powerful proxies for paleohydrological research. The exact type of hydrological information that is recorded in the delta D values of leaf wax n-alkanes remains, however, unclear. In a companion paper we provide experimental evidence showing that the delta D values of leaf wax n-alkanes of angiosperm plants grown under controlled environmental conditions not only reflect delta D values of precipitation - as has often been assumed - but that evaporative deuterium (D)- enrichment of leaf water has an additional critical effect on their delta D values. Here we present a detailed observational study that illustrates that evaporative D-enrichment of leaf water also affects the delta D values of leaf wax n-alkanes in plants from natural ecosystems along a 1500 km climate gradient in Northern Australia. Based on global simulations of leaf water D-enrichment we show that the effects of evaporative D-enrichment of leaf water on leaf wax n-alkane delta D values is relevant in all biomes but that it is particularly important in arid environments. Given the combined influence of precipitation delta D values and leaf water D-enrichment we argue that leaf wax n-alkane delta D values contain an integrated signal that can provide general hydrological information, e.g. on the aridity of a catchment area. We also suggest that more specific hydrological information and even plant physiological information can be obtained from leaf wax n-alkanes if additional indicators are available to constrain the plant- and precipitation-derived influences on their delta D values. As such, our findings have important implications for the interpretation of leaf wax n-alkane delta D values from paleohydrological records. In addition, our investigations open the door to employ delta D values of leaf wax n-alkanes as new ecohydrological proxies in contemporary plant and ecosystem sciences. (C) 2012 Elsevier Ltd. All rights reserved. |
类型 | Article |
语种 | 英语 |
国家 | Switzerland ; Australia ; Germany ; USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000317746800005 |
WOS关键词 | HYDROGEN-ISOTOPIC COMPOSITION ; D/H RATIOS ; METEORIC PRECIPITATION ; AFRICAN HYDROLOGY ; AQUATIC PLANTS ; FRACTIONATION ; OXYGEN ; TERRESTRIAL ; CLIMATE ; VARIABILITY |
WOS类目 | Geochemistry & Geophysics |
WOS研究方向 | Geochemistry & Geophysics |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/177312 |
作者单位 | 1.Swiss Fed Inst Technol, Inst Agr Sci, CH-8092 Zurich, Switzerland; 2.Univ Melbourne, Dept Forest & Ecosyst Sci, Melbourne, Vic 3010, Australia; 3.Univ Potsdam, Inst Earth & Environm Sci, DFG Leibniz Ctr Surface Proc & Climate Studies, Potsdam, Germany; 4.Univ Bremen, MARUM Ctr Marine Environm Sci, Bremen, Germany; 5.Australian Natl Univ, Res Sch Biol, Canberra, ACT, Australia; 6.Texas A&M Univ, Dept Ecosyst Sci & Management, College Stn, TX 77843 USA |
推荐引用方式 GB/T 7714 | Kahmen, Ansgar,Hoffmann, Bernd,Schefuss, Enno,et al. Leaf water deuterium enrichment shapes leaf wax n-alkane delta D values of angiosperm plants II: Observational evidence and global implications[J],2013,111:50-63. |
APA | Kahmen, Ansgar.,Hoffmann, Bernd.,Schefuss, Enno.,Arndt, Stefan K..,Cernusak, Lucas A..,...&Sachse, Dirk.(2013).Leaf water deuterium enrichment shapes leaf wax n-alkane delta D values of angiosperm plants II: Observational evidence and global implications.GEOCHIMICA ET COSMOCHIMICA ACTA,111,50-63. |
MLA | Kahmen, Ansgar,et al."Leaf water deuterium enrichment shapes leaf wax n-alkane delta D values of angiosperm plants II: Observational evidence and global implications".GEOCHIMICA ET COSMOCHIMICA ACTA 111(2013):50-63. |
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