干旱区生态环境知识资源中心(Arid): Multiple scales of spatial heterogeneity control soil respiration responses to precipitation across a dryland rainfall gradient

Arid

DOI	10.1007/s11104-020-04614-0
	Multiple scales of spatial heterogeneity control soil respiration responses to precipitation across a dryland rainfall gradient
	Throop, H. L.; Seely, M. K.; Marufu, V. J.
通讯作者	Throop, HL
来源期刊	PLANT AND SOIL
ISSN	0032-079X
EISSN	1573-5036
出版年	2020
卷号	453 期号:1-2 页码:423-443
英文摘要	Aims Soil respiration (R-s) is a major pathway for carbon release to the atmosphere. We explored variability in dryland R(s)response to rainfall pulses at multiple levels of spatial heterogeneity: 1) along a hyper-arid to arid rainfall gradient, 2) across soil surfaces that differ in stability and composition, and 3) among different geomorphic and vegetation patch types. Methods We measured in situ R(s)responses for 48 h following simulated rainfall pulses in the Namib Desert. Working across the rainfall gradient, we compared R(s)responses on two soil surfaces. Each soil surface had two vegetation/geomorphic patch types that differed in organic matter sources and transport processes, with one characterized by depositional inputs and one characterized by erosional losses. Results Soil respiration was highly responsive to rainfall pulses, although soil surfaces and patch types often exerted more control on R(s)than did rainfall pulses. Rainfall generally had proportionally greater influence on R(s)with higher annual rainfall. Greater R(s)occurred on stable than unstable soil surfaces and in depositional than erosional patch types. Conclusions Large differences in R(s)among rainfall zones, soil surfaces, and patch types point to the need to carefully consider multiple scales of spatial heterogeneity when interpreting dryland biogeochemical fluxes.
英文关键词	Arid Hyper-arid Carbon cycle Climate change Fog desert Namib Desert
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000545053900002
WOS关键词	CARBON-DIOXIDE FLUXES ; CENTRAL NAMIB DESERT ; CO2 EFFLUX ; SEMIARID ECOSYSTEMS ; VEGETATION COVER ; ORGANIC-CARBON ; WATER ; DYNAMICS ; PULSES ; FOG
WOS类目	Agronomy ; Plant Sciences ; Soil Science
WOS研究方向	Agriculture ; Plant Sciences
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/2XILL650/324915
作者单位	[Throop, H. L.] Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ 85287 USA; [Throop, H. L.] Arizona State Univ, Sch Life Sci, Tempe, AZ 85287 USA; [Throop, H. L.; Marufu, V. J.] Namibia Univ Sci & Technol, Fac Nat Resources & Spatial Sci, Private Bag 13388, Windhoek, Namibia; [Seely, M. K.] Participants Desert Res Fdn Namibia, Summer Drylands Program, POB 20232, Windhoek, Namibia
推荐引用方式 GB/T 7714	Throop, H. L.,Seely, M. K.,Marufu, V. J.. Multiple scales of spatial heterogeneity control soil respiration responses to precipitation across a dryland rainfall gradient[J]. Arizona State University,2020,453(1-2):423-443.
APA	Throop, H. L.,Seely, M. K.,&Marufu, V. J..(2020).Multiple scales of spatial heterogeneity control soil respiration responses to precipitation across a dryland rainfall gradient.PLANT AND SOIL,453(1-2),423-443.
MLA	Throop, H. L.,et al."Multiple scales of spatial heterogeneity control soil respiration responses to precipitation across a dryland rainfall gradient".PLANT AND SOIL 453.1-2(2020):423-443.