干旱区生态环境知识资源中心(Arid): The role of extreme rain events in driving tree growth across a continental-scale climatic range in Australia

Arid

DOI	10.1111/ecog.05671
	The role of extreme rain events in driving tree growth across a continental-scale climatic range in Australia
	O'Donnell, Alison J.; Renton, Michael; Allen, Kathryn J.; Grierson, Pauline F.
通讯作者	O'Donnell, AJ (corresponding author), Univ Western Australia, Sch Biol Sci, Perth, WA, Australia.
来源期刊	ECOGRAPHY
ISSN	0906-7590
EISSN	1600-0587
出版年	2021
卷号	44 期号:7 页码:1086-1097
英文摘要	Rainfall regimes in many parts of the world have become increasingly dominated by fewer, but more extreme, rainfall events. Understanding how tree growth responds to changes in the frequency and intensity of rain events is critical to predicting how climate change will impact on forests and woodlands in the future. In this study, we used five tree-ring records of the native Australian conifer Callitris columellaris that span a large (> 20 degrees) latitudinal and climatic gradient from the mesic (tropical) north to the xeric (semi-arid) south of Australia to investigate how inter-annual and spatial variation in the delivery of rainfall (the intensity and frequency of rain events) influences tree growth. In semi-arid biomes (similar to 300-400 mm rainfall annually), tree growth is most strongly related to the amount of rainfall from heavy (> 75th percentile) rain days or the number of extreme (> 90th percentile) rain days, regardless of differences in the seasonal distribution and average intensity of rainfall among sites. Our findings also indicate that there is likely a minimum threshold amount of daily rainfall (similar to 5 mm) that is required to stimulate tree growth in the semi-arid zone. In contrast, in the tropics (> 800 mm annual rainfall), inter-annual variation in growth is best explained by total growing season rainfall or the number of rain days > similar to 5 mm (similar to 50th percentile of rain days) rather than extreme rainfall. Our findings indicate that not all rain events are important for driving tree growth, which has important implications for interpreting climatic signals in tree rings. Our findings also indicate that projected increases in the intensity of extreme rain events are likely to have contrasting impacts on tree growth across biomes, with greater and positive impacts on growth in semi-arid biomes and potentially negative impacts on growth in tropical biomes of Australia.
英文关键词	Callitris dendroclimatology precipitation rainfall intensity and frequency ring width thresholds tree growth tree rings
类型	Article
语种	英语
开放获取类型	DOAJ Gold
收录类别	SCI-E
WOS记录号	WOS:000646579000001
WOS关键词	NET PRIMARY PRODUCTIVITY ; PRECIPITATION REGIMES ; PLANT-RESPONSES ; RING WIDTH ; SOIL-WATER ; SAP FLOW ; PULSES ; VARIABILITY ; CARBON ; ECOSYSTEMS
WOS类目	Biodiversity Conservation ; Ecology
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
来源机构	University of Western Australia
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/349979
作者单位	[O'Donnell, Alison J.; Renton, Michael; Grierson, Pauline F.] Univ Western Australia, Sch Biol Sci, Perth, WA, Australia; [Renton, Michael] Univ Western Australia, Sch Agr & Environm, Perth, WA, Australia; [Allen, Kathryn J.] Univ Melbourne, Sch Ecosyst & Forest Sci, Richmond, Vic, Australia; [Allen, Kathryn J.] Univ New South Wales, ARC Ctr Excellence Australian Biodivers & Heritag, Sydney, NSW, Australia
推荐引用方式 GB/T 7714	O'Donnell, Alison J.,Renton, Michael,Allen, Kathryn J.,et al. The role of extreme rain events in driving tree growth across a continental-scale climatic range in Australia[J]. University of Western Australia,2021,44(7):1086-1097.
APA	O'Donnell, Alison J.,Renton, Michael,Allen, Kathryn J.,&Grierson, Pauline F..(2021).The role of extreme rain events in driving tree growth across a continental-scale climatic range in Australia.ECOGRAPHY,44(7),1086-1097.
MLA	O'Donnell, Alison J.,et al."The role of extreme rain events in driving tree growth across a continental-scale climatic range in Australia".ECOGRAPHY 44.7(2021):1086-1097.