干旱区生态环境知识资源中心(Arid): Tracking down carbon inputs underground from an arid zone Australian calcrete

Arid

DOI	10.1371/journal.pone.0237730
	Tracking down carbon inputs underground from an arid zone Australian calcrete
	Sacco, Mattia; Blyth, Alison J.; Humphreys, William F.; Middleton, Jen A.; White, Nicole E.; Campbell, Matthew; Mousavi-Derazmahalleh, Masha; Laini, Alex; Hua, Quan; Meredith, Karina; Cooper, Steven J. B.; Griebler, Christian; Allard, Sebastien; Grierson, Pauline; Grice, Kliti
通讯作者	Sacco, M
来源期刊	PLOS ONE
ISSN	1932-6203
出版年	2020
卷号	15 期号:8
英文摘要	Freshwater ecosystems play a key role in shaping the global carbon cycle and maintaining the ecological balance that sustains biodiversity worldwide. Surficial water bodies are often interconnected with groundwater, forming a physical continuum, and their interaction has been reported as a crucial driver for organic matter (OM) inputs in groundwater systems. However, despite the growing concerns related to increasing anthropogenic pressure and effects of global change to groundwater environments, our understanding of the dynamics regulating subterranean carbon flows is still sparse. We traced carbon composition and transformations in an arid zone calcrete aquifer using a novel multidisciplinary approach that combined isotopic analyses of dissolved organic carbon (DOC) and inorganic carbon (DIC) (delta C-13(DOC), delta C-13(DIC),(14)C(DOC)and(14)C(DIC)) with fluorescence spectroscopy (Chromophoric Dissolved OM (CDOM) characterisation) and metabarcoding analyses (taxonomic and functional genomics on bacterial 16S rRNA). To compare dynamics linked to potential aquifer recharge processes, water samples were collected from two boreholes under contrasting rainfall: low rainfall ((LR), dry season) and high rainfall ((HR), wet season). Our isotopic results indicate limited changes and dominance of modern terrestrial carbon in the upper part (northeast) of the bore field, but correlation between HR and increased old and(13)C-enriched DOC in the lower area (southwest). CDOM results show a shift from terrestrially to microbially derived compounds after rainfall in the same lower field bore, which was also sampled for microbial genetics. Functional genomic results showed increased genes coding for degradative pathways-dominated by those related to aromatic compound metabolisms-during HR. Our results indicate that rainfall leads to different responses in different parts of the bore field, with an increase in old carbon sources and microbial processing in the lower part of the field. We hypothesise that this may be due to increasing salinity, either due to mobilisation of Cl(-)from the soil, or infiltration from the downstream salt lake during HR. This study is the first to use a multi-technique assessment using stable and radioactive isotopes together with functional genomics to probe the principal organic biogeochemical pathways regulating an arid zone calcrete system. Further investigations involving extensive sampling from diverse groundwater ecosystems will allow better understanding of the microbiological pathways sustaining the ecological functioning of subterranean biota.
类型	Article
语种	英语
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000566947200062
WOS关键词	DISSOLVED ORGANIC-MATTER ; MICROBIAL COMMUNITIES ; INORGANIC CARBON ; FLUORESCENCE SPECTROSCOPY ; CLIMATE-CHANGE ; DENITRIFYING BACTERIUM ; GROUNDWATER ; WATER ; AQUIFER ; ECOSYSTEMS
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
来源机构	University of Western Australia
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/326105
作者单位	[Sacco, Mattia; Blyth, Alison J.; White, Nicole E.; Campbell, Matthew; Grice, Kliti] Curtin Univ, WA Organ Isotope Geochem Ctr, Sch Earth & Planetary Sci, Inst Geosci Res, Perth, WA, Australia; [Humphreys, William F.; Middleton, Jen A.; Grierson, Pauline] Univ Western Australia, Sch Biol Sci, Crawley, WA, Australia; [Humphreys, William F.] Western Australian Museum, Collect & Res Ctr, Welshpool, WA, Australia; [Mousavi-Derazmahalleh, Masha] Curtin Univ, Sch Mol & Life Sci, Trace & Environm DNA Lab, Perth, WA, Australia; [Laini, Alex] Univ Parma, Dept Chem Life Sci & Environm Sustainabil, Parco Area Sci, Parma, Italy; [Hua, Quan; Meredith, Karina] Australian Nucl Sci & Technol Org ANSTO, Kirrawee Dc, NSW, Australia; [Cooper, Steven J. B.] Univ Adelaide, Australian Ctr Evolutionary Biol & Biodivers, Sch Biol Sci, Adelaide, SA, Australia; [Cooper, Steven J. B.] South Australian Museum, Evolutionary Biol Unit, Adelaide, SA, Australia; [Griebler, Christian] Univ Vienna, Dept Funct & Evolutionary Ecol, Vienna, ...
推荐引用方式 GB/T 7714	Sacco, Mattia,Blyth, Alison J.,Humphreys, William F.,et al. Tracking down carbon inputs underground from an arid zone Australian calcrete[J]. University of Western Australia,2020,15(8).
APA	Sacco, Mattia.,Blyth, Alison J..,Humphreys, William F..,Middleton, Jen A..,White, Nicole E..,...&Grice, Kliti.(2020).Tracking down carbon inputs underground from an arid zone Australian calcrete.PLOS ONE,15(8).
MLA	Sacco, Mattia,et al."Tracking down carbon inputs underground from an arid zone Australian calcrete".PLOS ONE 15.8(2020).