干旱区生态环境知识资源中心(Arid): Vegetation and precipitation shifts interact to alter organic and inorganic carbon storage in cold desert soils

Arid

DOI	10.1002/ecs2.2655
	Vegetation and precipitation shifts interact to alter organic and inorganic carbon storage in cold desert soils
	Huber, David P.1,2; Lohse, Kathleen A.1,3; Commendador, Amy 1; Joy, Stephen 3; Aho, Ken 1; Finney, Bruce 1,3; Germino, Matthew J.4
通讯作者	Huber, David P.
来源期刊	ECOSPHERE
ISSN	2150-8925
出版年	2019
卷号	10 期号:3
英文摘要	Dryland ecosystems are experiencing shifts in rainfall and plant community composition, which are expected to alter cycling and storage of soil carbon (C). Few experiments have been conducted to examine long-term effects on (1) soil organic C (SOC) pools throughout the soil profile, and (2) soil inorganic C (SIC) pools as they relate to dynamic changes in C storage and climate change. We measured SOC and SIC from 0 to 1 m beneath plants and in adjacent interplant microsites following nearly 20 yr of experimental manipulations of plant community (native sagebrush steppe or monoculture of exotic crested wheatgrass) and the amount and timing of water availability (ambient, or doubling of annual rainfall in the dormant, DORM, or growing, GROW, season). Under sagebrush plants, GROW increased both SOC and SIC pools, resulting in total carbon (TC) pools 15% greater than plots receiving ambient precipitation, while DORM decreased SOC and SIC pools, decreasing TC pools 20% from ambient. Under crested wheatgrass plants, GROW increased SOC by 73% but decreased SIC by 11% relative to ambient, netting no change in TC pools, while DORM SIC pools were 5% greater than ambient, with no significant increase in either SOC or TC pools. GROW significantly increased TC pools for interplant microsites, regardless of vegetation treatment. At the community scale and summing C pools weighted by percent patch cover, patterns of TC pool were similar to plot measurements. Our findings suggest that sagebrush communities can become a net C source to the atmosphere with increases in dormant season rainfall rather than a C sink as previously predicted. We also provide evidence of SIC as an important and dynamic C sequestration mechanism in drylands. Consideration of vegetation type, all or most of the soil profile, and both organic and inorganic C pools are all important to accurately predict C sequestration with changing climate and disturbance in drylands.
英文关键词	Agropyron cristatum Artemisia tridentata carbon sequestration carbonates climate change drylands invasive species long-term experiment precipitation seasonality semi-arid soil inorganic carbon soil organic carbon
类型	Article
语种	英语
国家	USA
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000463977000038
WOS关键词	EARTH SYSTEM MODELS ; LONG-TERM ; SAGEBRUSH-STEPPE ; TERRESTRIAL ECOSYSTEMS ; TURNOVER TIMES ; CLIMATE-CHANGE ; WATER-CONTENT ; PATTERNS ; SEQUESTRATION ; RESPONSES
WOS类目	Ecology
WOS研究方向	Environmental Sciences & Ecology
来源机构	United States Geological Survey
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215302
作者单位	1.Idaho State Univ, Dept Biol Sci, Pocatello, ID 83209 USA; 2.USDA ARS, Boise, ID 83712 USA; 3.Idaho State Univ, Dept Geosci, Pocatello, ID 83209 USA; 4.US Geol Survey, Forest & Rangeland Ecosyst Sci Ctr, Boise, ID 83706 USA
推荐引用方式 GB/T 7714	Huber, David P.,Lohse, Kathleen A.,Commendador, Amy,et al. Vegetation and precipitation shifts interact to alter organic and inorganic carbon storage in cold desert soils[J]. United States Geological Survey,2019,10(3).
APA	Huber, David P..,Lohse, Kathleen A..,Commendador, Amy.,Joy, Stephen.,Aho, Ken.,...&Germino, Matthew J..(2019).Vegetation and precipitation shifts interact to alter organic and inorganic carbon storage in cold desert soils.ECOSPHERE,10(3).
MLA	Huber, David P.,et al."Vegetation and precipitation shifts interact to alter organic and inorganic carbon storage in cold desert soils".ECOSPHERE 10.3(2019).