干旱区生态环境知识资源中心(Arid): Global patterns and climatic controls of belowground net carbon fixation

Arid

DOI	10.1073/pnas.2006715117
	Global patterns and climatic controls of belowground net carbon fixation
	Gherardi, Laureano A.; Sala, Osvaldo E.
通讯作者	Gherardi, LA
来源期刊	PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
ISSN	0027-8424
出版年	2020
卷号	117 期号:33 页码:20038-20043
英文摘要	Carbon allocated underground through belowground net primary production represents the main input to soil organic carbon. This is of significant importance, because soil organic carbon is the third -largest carbon stock after oceanic and geological pools. However, drivers and controls of belowground productivity and the fraction of total carbon fixation allocated belowground remain uncertain. Here we estimate global belowground net primary productivity as the difference between satellite-based total net primary produc-tivity and field observations of aboveground net primary produc-tion and assess climatic controls among biomes. On average, belowground carbon productivity is estimated as 24.7 Pg y(-1), accounting for 46% of total terrestrial carbon fixation. Across bi-omes, belowground productivity increases with mean annual pre-cipitation, although the rate of increase diminishes with increasing precipitation. The fraction of total net productivity allocated belowground exceeds 50% in a large fraction of terrestrial ecosys-tems and decreases from arid to humid ecosystems. This work adds to our understanding of the belowground carbon productiv-ity response to climate change and provides a comprehensive global quantification of root/belowground productivity that will aid the budgeting and modeling of the global carbon cycle.
英文关键词	global C cycle BNPP primary production allocation root production
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000567818600014
WOS关键词	ROOT BIOMASS ; PRIMARY PRODUCTIVITY ; LEAF-AREA ; SOIL ; ALLOCATION ; TEMPERATE ; ECOSYSTEM ; FORESTS ; GRASSLAND ; SATELLITE
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
来源机构	Arizona State University
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/326173
作者单位	[Gherardi, Laureano A.; Sala, Osvaldo E.] Arizona State Univ, Global Drylands Ctr, Tempe, AZ 85287 USA; [Gherardi, Laureano A.; Sala, Osvaldo E.] Arizona State Univ, Sch Life Sci, Tempe, AZ 85287 USA; [Sala, Osvaldo E.] Arizona State Univ, Sch Sustainabil, Tempe, AZ 85287 USA
推荐引用方式 GB/T 7714	Gherardi, Laureano A.,Sala, Osvaldo E.. Global patterns and climatic controls of belowground net carbon fixation[J]. Arizona State University,2020,117(33):20038-20043.
APA	Gherardi, Laureano A.,&Sala, Osvaldo E..(2020).Global patterns and climatic controls of belowground net carbon fixation.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,117(33),20038-20043.
MLA	Gherardi, Laureano A.,et al."Global patterns and climatic controls of belowground net carbon fixation".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 117.33(2020):20038-20043.