Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1111/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
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ISSN | 1466-822X |
EISSN | 1466-8238 |
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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