Identifying areas at risk of drought-induced tree mortality across South-Eastern Australia.

Global Change Biology
Martin G De KauwePeter R Briggs

Abstract

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 (~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 hydraul...Continue Reading

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Citations

Jan 27, 2021·The New Phytologist·Mingkai JiangBelinda E Medlyn
Mar 7, 2021·Trends in Ecology & Evolution·Anna T TrugmanNathan L Stephenson
Feb 26, 2021·Ecological Applications : a Publication of the Ecological Society of America·Daniel Nadal-SalaNadine K Ruehr
Apr 15, 2021·Global Change Biology·Jennifer M R PetersBrendan Choat
Jun 9, 2021·The New Phytologist·Martin G De KauweDavid T Tissue
Aug 29, 2021·Plant, Cell & Environment·Rachael H NolanRoss Bradstock
Oct 30, 2021·The New Phytologist·Lucas A Cernusak, Martin G De Kauwe
Dec 4, 2021·The New Phytologist·Oliver BinksPatrick Meir

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