Arid
DOI10.1111/geb.12319
How does clay constrain woody biomass in drylands?
Fensham, Roderick J.1,2; Butler, Don W.1; Foley, Jenny3
通讯作者Fensham, Roderick J.
来源期刊GLOBAL ECOLOGY AND BIOGEOGRAPHY
ISSN1466-822X
EISSN1466-8238
出版年2015
卷号24期号:8页码:950-958
英文摘要

AimTo investigate the role of clay in limiting the development of woody biomass in drylands.


LocationAustralia.


MethodsSpatial data representing woody biomass, soil clay content and climate for the Australian continent were interpreted to explore the relationship between a moisture index and woody biomass on clay and non-clay substrates. Moisture and soil water potential were investigated through time for clay and sand plains. Sub-soil clay and other soil characteristics were compared between areas with and without high tree mortality after drought.


ResultsThe substantially lower woody biomass on clay soils than non-clay soils in the drylands of the Australian continent verifies the inverse texture effect. A clay floodplain consistently held more water than an adjacent sandplain, but soil moisture in the clay was effectively inaccessible to plants for much longer periods because of more negative values of water potential in the clay soil. Small increases in sub-soil clay were associated with high tree mortality.


Main conclusionsOur findings suggest that the inverse texture effect’, which describes the negative association of woody biomass with soil clay content in drylands, may mostly relate to the moisture-retentive properties of clay rather than being caused by reduced infiltration and enhanced evaporation from clay-rich soils. Our evidence suggests that clay soils constrain woodiness in drylands by exacerbating water stress, and confirm the fundamental role of aridity in determining woody biomass and the global distribution of grassland.


英文关键词Clay drought-induced tree mortality grassland inverse texture effect moisture matric potential savanna soil moisture
类型Article
语种英语
国家Australia
收录类别SCI-E
WOS记录号WOS:000357855700008
WOS关键词PARTICLE-SIZE DISTRIBUTION ; MOJAVE DESERT SHRUBS ; TROPICAL FOREST ; CRITICAL TRANSITIONS ; GLOBAL RESILIENCE ; AFRICAN SAVANNAS ; PLANT MORTALITY ; SOIL TEXTURE ; DROUGHT ; WATER
WOS类目Ecology ; Geography, Physical
WOS研究方向Environmental Sciences & Ecology ; Physical Geography
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/187605
作者单位1.Queensland Herbarium, Toowong, Qld 4066, Australia;
2.Univ Queensland, Dept Biol Sci, St Lucia, Qld 4072, Australia;
3.Dept Nat Resources & Mines Resource Assessment &, Toowoomba, Qld 4350, Australia
推荐引用方式
GB/T 7714
Fensham, Roderick J.,Butler, Don W.,Foley, Jenny. How does clay constrain woody biomass in drylands?[J],2015,24(8):950-958.
APA Fensham, Roderick J.,Butler, Don W.,&Foley, Jenny.(2015).How does clay constrain woody biomass in drylands?.GLOBAL ECOLOGY AND BIOGEOGRAPHY,24(8),950-958.
MLA Fensham, Roderick J.,et al."How does clay constrain woody biomass in drylands?".GLOBAL ECOLOGY AND BIOGEOGRAPHY 24.8(2015):950-958.
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