气候变化领域集成服务门户(CCPortal): Global emergent responses of stream microbial metabolism to glacier shrinkage

CCPortal

DOI	10.1038/s41561-024-01393-6
	Global emergent responses of stream microbial metabolism to glacier shrinkage
	Kohler, Tyler J.; Bourquin, Massimo; Peter, Hannes; Yvon-Durocher, Gabriel; Sinsabaugh, Robert L.; Deluigi, Nicola; Styllas, Michael; Battin, Tom J.
发表日期	2024
ISSN	1752-0894
EISSN	1752-0908
起始页码	17
结束页码	4
卷号	17 期号:4
英文摘要	Most cryospheric ecosystems are energy limited. How their energetics will respond to climate change remains largely unknown. This is particularly true for glacier-fed streams, which interface with the cryosphere and initiate some of Earth's largest river systems. Here, by studying resource stoichiometry and microbial energetics in 154 glacier-fed streams sampled by the Vanishing Glaciers project across Earth's major mountain ranges, we show that these ecosystems and their benthic microbiome are overall carbon and phosphorus limited. Threshold elemental ratios and low carbon use efficiencies (median: 0.15) modelled from extracellular enzymatic activities corroborate resource limitation in agreement with maintenance metabolism of benthic microorganisms. Space-for-time substitution analyses suggest that glacier shrinkage will stimulate benthic primary production in glacier-fed streams, thereby relieving microbial metabolism from carbon limitation. Concomitantly, we find that increasing streamwater temperature will probably stimulate microbial growth (temperature sensitivity: 0.62 eV). Consequently, elevated microbial demands for phosphorus, but diminishing inputs from subglacial sources, may intensify phosphorus limitation as glaciers shrink. Our study thus unveils a 'green transition' towards autotrophy in the world's glacier-fed streams, entailing shifts in the energetics of their microorganisms. Glacier shrinkage intensifies phosphorus limitation but alleviates carbon limitation in glacier-fed streams, according to analyses of resource stoichiometry and microbial metabolism in glacier-fed streams from mountain regions.
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:001176400200001
来源期刊	NATURE GEOSCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/295744
作者单位	Swiss Federal Institutes of Technology Domain; Ecole Polytechnique Federale de Lausanne; Charles University Prague; University of Exeter; University of New Mexico
推荐引用方式 GB/T 7714	Kohler, Tyler J.,Bourquin, Massimo,Peter, Hannes,et al. Global emergent responses of stream microbial metabolism to glacier shrinkage[J],2024,17(4).
APA	Kohler, Tyler J..,Bourquin, Massimo.,Peter, Hannes.,Yvon-Durocher, Gabriel.,Sinsabaugh, Robert L..,...&Battin, Tom J..(2024).Global emergent responses of stream microbial metabolism to glacier shrinkage.NATURE GEOSCIENCE,17(4).
MLA	Kohler, Tyler J.,et al."Global emergent responses of stream microbial metabolism to glacier shrinkage".NATURE GEOSCIENCE 17.4(2024).