干旱区生态环境知识资源中心(Arid): Phosphate oxygen isotope fingerprints of past biological activity in the Atacama Desert

Arid

DOI	10.1016/j.gca.2021.07.027
	Phosphate oxygen isotope fingerprints of past biological activity in the Atacama Desert
	Wang, Ye; Moradi, Ghazal; Klumpp, Erwin; von Sperber, Christian; Tamburini, Federica; Ritter, Benedikt; Fuentes, Barbara; Amelung, Wulf; Bol, Roland
通讯作者	Wang, Y (corresponding author), Univ Bonn, Inst Crop Sci & Resource Conservat Soil Sci & Soi, D-53115 Bonn, Germany.
来源期刊	GEOCHIMICA ET COSMOCHIMICA ACTA
ISSN	0016-7037
EISSN	1872-9533
出版年	2021
卷号	311 页码:1-11
英文摘要	The Atacama Desert (Chile) is one of driest places on Earth, with a hyper-arid climate and less than 2 mm yr(-1) precipitation; nevertheless, it has experienced rare periods of sporadic rainfall. These periods shortly enhanced vegetation growth and microbial activity, which must have utilized major nutrients such as phosphorus (P). However, any biological cycling of P involves an oxygen exchange with water, which should now reside in the hyperarid soils as tracer of life. In order to identify such evidences, we performed sequential P fractionation and analyzed the oxygen isotope composition of HCl-extractable phosphate (delta(OHHCl-P)-O-18) in the surface soil (0-15 cm) of a climatic gradient along the rising alluvial fans of the Central Depression to the Precordillera, Chile. At the driest sites, the delta(OHHCl-P)-O-18 values were constant with depth and deviated from biologically-driven isotopic equilibrium. In contrast, we observed a considerable increase of delta(OHHCl-P)-O-18 values below the soil surface at less arid sites, where some isotope values were even within the range of full isotopic equilibrium with biologically cycled phosphate. For the latter sites, this points to most efficient biological P cycling right below the uppermost surface of the desert. Critically, the absolute concentrations of this biologically cycled P exceeded those of P potentially stored in living microbial cells by at least two orders of magnitude. Therefore, our data provides evidence that delta(OHHCl-P)-O-18 values trace not recent but past biological activity, making it a powerful tool for assessing the existence, pathways and evolution of life in such arid ecosystems on Earth and, thus, potentially on other planets such as Mars. (C) 2021 Elsevier Ltd. All rights reserved.
英文关键词	The Atacama Desert Hyperarid soils Sequential P fractionation Oxygen isotope composition of HCl-extractable phosphate (delta 18OHC1 P) Past biological activity
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000693337600001
WOS关键词	MICROBIAL COMMUNITIES ; SOIL-PHOSPHORUS ; NORTHERN CHILE ; CLIMATE-CHANGE ; ALLUVIAL-FAN ; MIOCENE AGE ; WATER ; ARIDITY ; PHOSPHOMONOESTERASES ; FRACTIONATION
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/2XILL650/363379
作者单位	[Wang, Ye; Amelung, Wulf] Univ Bonn, Inst Crop Sci & Resource Conservat Soil Sci & Soi, D-53115 Bonn, Germany; [Moradi, Ghazal; Klumpp, Erwin; Amelung, Wulf; Bol, Roland] Forschungszentrum Julich, Inst Bio & Geosci, Agrosphere IBG 3, Julich, Germany; [Moradi, Ghazal] Rhein Westfal TH Aachen, Inst Environm Res, Biol 5,Worringerweg 1, D-52074 Aachen, Germany; [von Sperber, Christian] McGill Univ, Dept Geog, Montreal, PQ H3A 0B9, Canada; [Tamburini, Federica] Swiss Fed Inst Technol, Inst Agr Sci, CH-8315 Lindau, Switzerland; [Ritter, Benedikt] Univ Cologne, Inst Geol & Mineral, D-50675 Cologne, Germany; [Fuentes, Barbara] Univ Catolica Norte, Dept Ingn Quim, Lab Tecnol Membranas Medio Ambiente & Biotecnol, Antofagasta, Chile
推荐引用方式 GB/T 7714	Wang, Ye,Moradi, Ghazal,Klumpp, Erwin,et al. Phosphate oxygen isotope fingerprints of past biological activity in the Atacama Desert[J],2021,311:1-11.
APA	Wang, Ye.,Moradi, Ghazal.,Klumpp, Erwin.,von Sperber, Christian.,Tamburini, Federica.,...&Bol, Roland.(2021).Phosphate oxygen isotope fingerprints of past biological activity in the Atacama Desert.GEOCHIMICA ET COSMOCHIMICA ACTA,311,1-11.
MLA	Wang, Ye,et al."Phosphate oxygen isotope fingerprints of past biological activity in the Atacama Desert".GEOCHIMICA ET COSMOCHIMICA ACTA 311(2021):1-11.