干旱区生态环境知识资源中心(Arid): The impact of shifting Ko center dot ppen-Geiger climate zones on soil organic carbon concentrations in Australian grasslands

Arid

DOI	10.1016/j.gloplacha.2021.103523
	The impact of shifting Ko center dot ppen-Geiger climate zones on soil organic carbon concentrations in Australian grasslands
	Gibson, A. J.; Hancock, G. R.; Verdon-Kidd, D. C.; Martinez, C.; Wells, T.
通讯作者	Gibson, AJ (corresponding author), Univ Newcastle, Sch Environm & Life Sci, Callaghan, NSW, Australia.
来源期刊	GLOBAL AND PLANETARY CHANGE
ISSN	0921-8181
EISSN	1872-6364
出版年	2021
卷号	202
英文摘要	The factors determining the spatial distribution of soil organic carbon (SOC) at large-scales closely align with bioclimate regions; reflecting climate, ecosystem and soil properties. Recent studies of the Ko center dot ppen-Geiger climate zones of Australia have highlighted an extension of the hot, arid, steppe environment from central Australia into the southeast (SE) under future climate change scenarios (2071-2100 under RCP 8.5). As SOC concentrations are highest in Australia's SE, it is important the effect of this shift is quantified. This study assesses this and how changes in the factors that control SOC formation may alter SOC concentrations. Field measured SOC concentrations were compared to current climate, soil, topography, vegetation, and soil erosion variables for 12 grassland sites from SE to NW Australia. SOC concentrations ranged from 0.39% in northwest (NW) and Central Australia to as high as 6.88% in the SE. Using regression analyses; temperature, elevation and Normalised Difference Vegetation Index were found to be the only significant drivers (alpha = 0.95) of SOC across the sites. Partial correlation analyses then identified temperature, elevation and clay content as imparting a significant effect on the relationships between SOC and water availability variables. This indicates that an extension of the arid environment into SE Australia may lead to a decrease in SOC (up to 1.12%), as mean annual temperature exceeds threshold values that limit SOC concentration. This is significant as the majority of Australia's SOC is stored in this area and these environments exert a strong influence on global carbon cycling.
英文关键词	Soil organic carbon Climate change Grassland Soil Carbon cycle Land management
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000659470000003
WOS关键词	EROSION ; CATCHMENT ; STOCKS ; MANAGEMENT ; MAP
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368665
作者单位	[Gibson, A. J.; Hancock, G. R.; Verdon-Kidd, D. C.] Univ Newcastle, Sch Environm & Life Sci, Callaghan, NSW, Australia; [Gibson, A. J.] Univ Newcastle, Univ Dr, Callaghan, NSW 2308, Australia; [Martinez, C.] Univ Queensland, Sch Agr & Food Sci, Brisbane, Qld, Australia; [Wells, T.] Univ Newcastle, Sch Engn, Callaghan, NSW, Australia
推荐引用方式 GB/T 7714	Gibson, A. J.,Hancock, G. R.,Verdon-Kidd, D. C.,et al. The impact of shifting Ko center dot ppen-Geiger climate zones on soil organic carbon concentrations in Australian grasslands[J],2021,202.
APA	Gibson, A. J.,Hancock, G. R.,Verdon-Kidd, D. C.,Martinez, C.,&Wells, T..(2021).The impact of shifting Ko center dot ppen-Geiger climate zones on soil organic carbon concentrations in Australian grasslands.GLOBAL AND PLANETARY CHANGE,202.
MLA	Gibson, A. J.,et al."The impact of shifting Ko center dot ppen-Geiger climate zones on soil organic carbon concentrations in Australian grasslands".GLOBAL AND PLANETARY CHANGE 202(2021).