气候变化领域集成服务门户(CCPortal): Microbial functional changes mark irreversible course of Tibetan grassland degradation

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DOI	10.1038/s41467-022-30047-7
	Microbial functional changes mark irreversible course of Tibetan grassland degradation
	Breidenbach, Andreas; Schleuss, Per-Marten; Liu, Shibin; Schneider, Dominik; Dippold, Michaela A.; de la Haye, Tilman; Miehe, Georg; Heitkamp, Felix; Seeber, Elke; Mason-Jones, Kyle; Xu, Xingliang; Huanming, Yang; Xu, Jianchu; Dorji, Tsechoe; Gube, Matthias; Norf, Helge; Meier, Jutta; Guggenberger, Georg; Kuzyakov, Yakov; Spielvogel, Sandra
通讯作者	Spielvogel, S (通讯作者)
发表日期	2022
EISSN	2041-1723
卷号	13 期号:1
英文摘要	The Tibetan Plateau's Kobresia pastures store 2.5% of the world's soil organic carbon (SOC). Climate change and overgrazing render their topsoils vulnerable to degradation, with SOC stocks declining by 42% and nitrogen (N) by 33% at severely degraded sites. We resolved these losses into erosion accounting for two-thirds, and decreased carbon (C) input and increased SOC mineralization accounting for the other third, and confirmed these results by comparison with a meta-analysis of 594 observations. The microbial community responded to the degradation through altered taxonomic composition and enzymatic activities. Hydrolytic enzyme activities were reduced, while degradation of the remaining recalcitrant soil organic matter by oxidative enzymes was accelerated, demonstrating a severe shift in microbial functioning. This may irreversibly alter the world ' s largest alpine pastoral ecosystem by diminishing its C sink function and nutrient cycling dynamics, negatively impacting local food security, regional water quality and climate. The Tibetan Kobresia pastures store 2.5% of the world's soil organic carbon. Here the authors show that soil degradation and microbial shifts may irreversibly diminish the carbon sink function and accelerate nutrient losses.
关键词	ARBUSCULAR MYCORRHIZAL STATUS LIGNOCELLULOSE DEGRADATION ALPINE MEADOWS CARBON PLATEAU PASTURE PLANTS FUNGI INTENSITY ECOSYSTEM
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000795204200008
来源期刊	NATURE COMMUNICATIONS
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260783
推荐引用方式 GB/T 7714	Breidenbach, Andreas,Schleuss, Per-Marten,Liu, Shibin,et al. Microbial functional changes mark irreversible course of Tibetan grassland degradation[J]. 中国科学院青藏高原研究所,2022,13(1).
APA	Breidenbach, Andreas.,Schleuss, Per-Marten.,Liu, Shibin.,Schneider, Dominik.,Dippold, Michaela A..,...&Spielvogel, Sandra.(2022).Microbial functional changes mark irreversible course of Tibetan grassland degradation.NATURE COMMUNICATIONS,13(1).
MLA	Breidenbach, Andreas,et al."Microbial functional changes mark irreversible course of Tibetan grassland degradation".NATURE COMMUNICATIONS 13.1(2022).