干旱区生态环境知识资源中心(Arid): Identifying areas at risk of drought-induced tree mortality across South-Eastern Australia

Arid

DOI	10.1111/gcb.15215
	Identifying areas at risk of drought-induced tree mortality across South-Eastern Australia
	De Kauwe, Martin G.; Medlyn, Belinda E.; Ukkola, Anna M.; Mu, Mengyuan; Sabot, Manon E. B.; Pitman, Andrew J.; Meir, Patrick; Cernusak, Lucas A.; Rifai, Sami W.; Choat, Brendan; Tissue, David T.; Blackman, Chris J.; Li, Ximeng; Roderick, Michael; Briggs, Peter R.
通讯作者	De Kauwe, MG
来源期刊	GLOBAL CHANGE BIOLOGY
ISSN	1354-1013
EISSN	1365-2486
出版年	2020
卷号	26 期号:10 页码:5716-5733
英文摘要	South-East Australia has recently been subjected to two of the worst droughts in the historical record (Millennium Drought, 2000-2009 and Big Dry, 2017-2019). Unfortunately, a lack of forest monitoring has made it difficult to determine whether widespread tree mortality has resulted from these droughts. Anecdotal observations suggest the Big Dry may have led to more significant tree mortality than the Millennium drought. Critically, to be able to robustly project future expected climate change effects on Australian vegetation, we need to assess the vulnerability of Australian trees to drought. Here we implemented a model of plant hydraulics into the Community Atmosphere Biosphere Land Exchange (CABLE) land surface model. We parameterized the drought response behaviour of five broad vegetation types, based on a common garden dry-down experiment with species originating across a rainfall gradient (188-1,125 mm/year) across South-East Australia. The new hydraulics model significantly improved (similar to 35%-45% reduction in root mean square error) CABLE's previous predictions of latent heat fluxes during periods of water stress at two eddy covariance sites in Australia. Landscape-scale predictions of the greatest percentage loss of hydraulic conductivity (PLC) of about 40%-60%, were broadly consistent with satellite estimates of regions of the greatest change in both droughts. In neither drought did CABLE predict that trees would have reached critical PLC in widespread areas (i.e. it projected a low mortality risk), although the model highlighted critical levels near the desert regions of South-East Australia where few trees live. Overall, our experimentally constrained model results imply significant resilience to drought conferred by hydraulic function, but also highlight critical data and scientific gaps. Our approach presents a promising avenue to integrate experimental data and make regional-scale predictions of potential drought-induced hydraulic failure.
英文关键词	Australia cavitation resistance drought tolerance land surface model plant hydraulics
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000561813000001
WOS关键词	LAND-COVER CHANGE ; STOMATAL CONDUCTANCE ; HYDRAULIC TRAITS ; MODEL PREDICTIONS ; WATER RELATIONS ; SURFACE FLUXES ; CLIMATE-CHANGE ; GAS-EXCHANGE ; CARBON ; FOREST
WOS类目	Biodiversity Conservation ; Ecology ; Environmental Sciences
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
来源机构	Commonwealth Scientific and Industrial Research Organisation
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/325768
作者单位	[De Kauwe, Martin G.; Ukkola, Anna M.; Mu, Mengyuan; Sabot, Manon E. B.; Pitman, Andrew J.; Roderick, Michael] ARC Ctr Excellence Climate Extremes, Sydney, NSW, Australia; [De Kauwe, Martin G.; Mu, Mengyuan; Sabot, Manon E. B.; Pitman, Andrew J.; Rifai, Sami W.] Univ New South Wales, Climate Change Res Ctr, Sydney, NSW 2052, Australia; [De Kauwe, Martin G.; Sabot, Manon E. B.] Univ New South Wales, Evolut & Ecol Res Ctr, Sydney, NSW, Australia; [Medlyn, Belinda E.; Choat, Brendan; Tissue, David T.; Blackman, Chris J.; Li, Ximeng] Western Sydney Univ, Hawkesbury Inst Environm, Penrith, NSW, Australia; [Ukkola, Anna M.; Roderick, Michael] Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT, Australia; [Meir, Patrick] Australian Natl Univ, Res Sch Biol, Acton, ACT, Australia; [Meir, Patrick] Univ Edinburgh, Sch Geosci, Edinburgh, Midlothian, Scotland; [Cernusak, Lucas A.] James Cook Univ, Coll Sci & Engn, Cairns, Qld, Australia; [Briggs, Peter R.] CSIRO Oceans & Atmosphere, Canberra, ACT, Australia
推荐引用方式 GB/T 7714	De Kauwe, Martin G.,Medlyn, Belinda E.,Ukkola, Anna M.,et al. Identifying areas at risk of drought-induced tree mortality across South-Eastern Australia[J]. Commonwealth Scientific and Industrial Research Organisation,2020,26(10):5716-5733.
APA	De Kauwe, Martin G..,Medlyn, Belinda E..,Ukkola, Anna M..,Mu, Mengyuan.,Sabot, Manon E. B..,...&Briggs, Peter R..(2020).Identifying areas at risk of drought-induced tree mortality across South-Eastern Australia.GLOBAL CHANGE BIOLOGY,26(10),5716-5733.
MLA	De Kauwe, Martin G.,et al."Identifying areas at risk of drought-induced tree mortality across South-Eastern Australia".GLOBAL CHANGE BIOLOGY 26.10(2020):5716-5733.