干旱区生态环境知识资源中心(Arid): Landscape-Scale Plant Water Content and Carbon Flux Behavior Following Moisture Pulses: From Dryland to Mesic Environments

Arid

DOI	10.1029/2020WR027592
	Landscape-Scale Plant Water Content and Carbon Flux Behavior Following Moisture Pulses: From Dryland to Mesic Environments
	Feldman, Andrew F.; Chulakadabba, Apisada; Gianotti, Daniel J. Short; Entekhabi, Dara
通讯作者	Feldman, AF (corresponding author), MIT, Dept Civil & Environm Engn, 77 Massachusetts Ave, Cambridge, MA 02139 USA.
来源期刊	WATER RESOURCES RESEARCH
ISSN	0043-1397
EISSN	1944-7973
出版年	2021
卷号	57 期号:1
英文摘要	Rain pulses followed by interstorm drying periods are the fundamental units of water input into ecosystems on subweekly time scales. It is essential to understand landscape-scale vegetation responses on these unit time scales as they may describe sensitivity of landscape water, carbon, and energy cycles to shifts in rainfall intensity and frequency, even if the average seasonal precipitation remains unchanged. Because pulse investigations are primarily carried out in drylands, little is known about the characteristics and extent of ecosystem plant pulse responses across the broader range of climates and biomes. Using satellite-based plant water content (from vegetation optical depth) and plant carbon uptake observations from eddy covariance towers across the continental United States climate gradient (dry to humid), we characterize large-scale plant carbon and water uptake responses to rain pulses during spring and summer months. We find that while all ecosystems in the study region show discernable plant water content and carbon flux responses to rain pulses, drier ecosystems exhibit more frequent and longer duration responses. Unlike mesic environments, drylands show significantly different responses under varying antecedent soil moisture and pulse magnitude conditions; the largest water and carbon uptakes follow large pulses on initially wet soils. We detect soil moisture thresholds primarily in drylands, which can partly explain dryland vegetation's different responses under dry and wet conditions. We conclude that vegetation responds to individual pulses of water availability across all climates and therefore a range of ecosystems are sensitive to rainfall distributions beyond simple seasonal precipitation totals.
类型	Article
语种	英语
开放获取类型	hybrid, Green Published
收录类别	SCI-E
WOS记录号	WOS:000618001100015
WOS关键词	WARM-SEASON PRECIPITATION ; NET ECOSYSTEM EXCHANGE ; SOIL-WATER ; STOMATAL CONDUCTANCE ; RAINFALL VARIABILITY ; PRIMARY PRODUCTIVITY ; CLIMATE VARIABILITY ; DROUGHT STRESS ; DIOXIDE FLUXES ; AGAVE-DESERTI
WOS类目	Environmental Sciences ; Limnology ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/369077
作者单位	[Feldman, Andrew F.; Gianotti, Daniel J. Short; Entekhabi, Dara] MIT, Dept Civil & Environm Engn, 77 Massachusetts Ave, Cambridge, MA 02139 USA; [Chulakadabba, Apisada] Harvard Univ, John A Paulson Sch Engn & Appl Sci, Cambridge, MA 02138 USA
推荐引用方式 GB/T 7714	Feldman, Andrew F.,Chulakadabba, Apisada,Gianotti, Daniel J. Short,et al. Landscape-Scale Plant Water Content and Carbon Flux Behavior Following Moisture Pulses: From Dryland to Mesic Environments[J],2021,57(1).
APA	Feldman, Andrew F.,Chulakadabba, Apisada,Gianotti, Daniel J. Short,&Entekhabi, Dara.(2021).Landscape-Scale Plant Water Content and Carbon Flux Behavior Following Moisture Pulses: From Dryland to Mesic Environments.WATER RESOURCES RESEARCH,57(1).
MLA	Feldman, Andrew F.,et al."Landscape-Scale Plant Water Content and Carbon Flux Behavior Following Moisture Pulses: From Dryland to Mesic Environments".WATER RESOURCES RESEARCH 57.1(2021).