干旱区生态环境知识资源中心(Arid): Chemosynthetic and photosynthetic bacteria contribute differentially to primary production across a steep desert aridity gradient

Arid

DOI	10.1038/s41396-021-01001-0
	Chemosynthetic and photosynthetic bacteria contribute differentially to primary production across a steep desert aridity gradient
	Bay, Sean K.; Waite, David W.; Dong, Xiyang; Gillor, Osnat; Chown, Steven L.; Hugenholtz, Philip; Greening, Chris
通讯作者	Bay, SK ; Greening, C (corresponding author), Monash Univ, Biomed Discovery Inst, Dept Microbiol, Clayton, Vic, Australia. ; Bay, SK ; Greening, C (corresponding author), Monash Univ, Sch Biol Sci, Clayton, Vic, Australia.
来源期刊	ISME JOURNAL
ISSN	1751-7362
EISSN	1751-7370
出版年	2021
英文摘要	Desert soils harbour diverse communities of aerobic bacteria despite lacking substantial organic carbon inputs from vegetation. A major question is therefore how these communities maintain their biodiversity and biomass in these resource-limiting ecosystems. Here, we investigated desert topsoils and biological soil crusts collected along an aridity gradient traversing four climatic regions (sub-humid, semi-arid, arid, and hyper-arid). Metagenomic analysis indicated these communities vary in their capacity to use sunlight, organic compounds, and inorganic compounds as energy sources. Thermoleophilia, Actinobacteria, and Acidimicrobiia were the most abundant and prevalent bacterial classes across the aridity gradient in both topsoils and biocrusts. Contrary to the classical view that these taxa are obligate organoheterotrophs, genome-resolved analysis suggested they are metabolically flexible, with the capacity to also use atmospheric H-2 to support aerobic respiration and often carbon fixation. In contrast, Cyanobacteria were patchily distributed and only abundant in certain biocrusts. Activity measurements profiled how aerobic H-2 oxidation, chemosynthetic CO2 fixation, and photosynthesis varied with aridity. Cell-specific rates of atmospheric H-2 consumption increased 143-fold along the aridity gradient, correlating with increased abundance of high-affinity hydrogenases. Photosynthetic and chemosynthetic primary production co-occurred throughout the gradient, with photosynthesis dominant in biocrusts and chemosynthesis dominant in arid and hyper-arid soils. Altogether, these findings suggest that the major bacterial lineages inhabiting hot deserts use different strategies for energy and carbon acquisition depending on resource availability. Moreover, they highlight the previously overlooked roles of Actinobacteriota as abundant primary producers and trace gases as critical energy sources supporting productivity and resilience of desert ecosystems.
类型	Article
语种	英语
开放获取类型	Other Gold
收录类别	SCI-E
WOS记录号	WOS:000654103400004
WOS关键词	SOIL MICROBIAL COMMUNITIES ; CHRONIC PHYSICAL DISTURBANCE ; NEGEV DESERT ; PRECIPITATION PULSES ; CARBON FIXATION ; ENERGY-SOURCE ; HIGH-AFFINITY ; H-2 ; CRUSTS ; MOISTURE
WOS类目	Ecology ; Microbiology
WOS研究方向	Environmental Sciences & Ecology ; Microbiology
来源机构	Ben-Gurion University of the Negev
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/352293
作者单位	[Bay, Sean K.; Greening, Chris] Monash Univ, Biomed Discovery Inst, Dept Microbiol, Clayton, Vic, Australia; [Bay, Sean K.; Chown, Steven L.; Greening, Chris] Monash Univ, Sch Biol Sci, Clayton, Vic, Australia; [Waite, David W.; Hugenholtz, Philip] Univ Queensland, Sch Chem & Mol Biosci, Australian Ctr Ecogen, St Lucia, Qld, Australia; [Waite, David W.] Univ Auckland, Sch Biol Sci, Auckland, New Zealand; [Dong, Xiyang] Sun Yat Sen Univ, Sch Marine Sci, Zhuhai, Peoples R China; [Gillor, Osnat] Ben Gurion Univ Negev, Blaustein Inst Desert Res, Zuckerberg Inst Water Res, Sede Boqer, Israel
推荐引用方式 GB/T 7714	Bay, Sean K.,Waite, David W.,Dong, Xiyang,et al. Chemosynthetic and photosynthetic bacteria contribute differentially to primary production across a steep desert aridity gradient[J]. Ben-Gurion University of the Negev,2021.
APA	Bay, Sean K..,Waite, David W..,Dong, Xiyang.,Gillor, Osnat.,Chown, Steven L..,...&Greening, Chris.(2021).Chemosynthetic and photosynthetic bacteria contribute differentially to primary production across a steep desert aridity gradient.ISME JOURNAL.
MLA	Bay, Sean K.,et al."Chemosynthetic and photosynthetic bacteria contribute differentially to primary production across a steep desert aridity gradient".ISME JOURNAL (2021).