干旱区生态环境知识资源中心(Arid): Bark functional ecology and its influence on the distribution of Australian half-butt eucalypts

Arid

DOI	10.1111/aec.13045
	Bark functional ecology and its influence on the distribution of Australian half-butt eucalypts
	Lawes, Michael J.; Woolley, Leigh-Ann; Van Holsbeeck, Sam; Murphy, Brett P.; Burrows, Geoffrey E.; Midgley, Jeremy J.
通讯作者	Lawes, MJ (corresponding author), Univ KwaZulu Natal, Sch Life Sci, P Bag X01, ZA-3209 Scottsville, South Africa.
来源期刊	AUSTRAL ECOLOGY
ISSN	1442-9985
EISSN	1442-9993
出版年	2021
卷号	46 期号:7 页码:1097-1111
英文摘要	Half-butt eucalypts (genera: Eucalyptus and Corymbia) have both thick outer bark at the stem base (half-butt) conferring resistance to surface fire, and thin photosynthetic canopy bark that reduces moisture stress. Here we examine how the functional ecology of dual outer bark types influences the wide distribution of Australian half-butt species. We evaluate the proposition that half-butts should predominate in semi-arid environments prone to surface fires. We measured the bark thickness, butt height relative to flame/fire char height and tree height, height of first branch, and the location and prevalence of epicormic resprouting of co-occurring Eucalyptus miniata (half-butt) and E. tetrodonta (fibrous bark only) individuals, across 15 sites with contrasting fire frequencies (2000-2015) in the Darwin region. Total tree height was compared with butt height for all E. miniata individuals. The survival of half-butt and other eucalypt species, as well as non-eucalypts, was investigated at three sites affected by intense gamba grass (Andropogon gayanus) fire. The proportion of half-butt species in each of Australia's 85 bioregions was calculated from geographic distribution records of 618 eucalypt species. Mean annual fire frequency (1997-2010), fire type (crown or surface fires) and climate in each bioregion was determined from satellite-derived records. Butt height at a site, including gamba grass sites, was not induced by flame height or affected by fire frequency and was approximately half the canopy height of the tree, suggesting it is internally regulated. The half-butt E. miniata and full-bark eucalypts were similarly resilient (survival) under surface fire conditions. Half-butt species predominated in arid and semi-arid bioregions characterised by surface fire, consistent with our proposition that half-butt bark is an adaptation to surface fire, and thin photosynthetic outer canopy bark reduces moisture stress, accounting for the wide distribution of half-butt eucalypts in arid and seasonally dry regions of Australia.
英文关键词	bark thickness basal bark canopy bark Corymbia epicormic resprouting Eucalyptus fire ecology moisture stress photosynthetic bark surface fire
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000705496400008
WOS关键词	FIRE-RESISTANCE ; THICKNESS ; SAVANNA ; TRAIT ; DIVERSITY ; REGIMES ; MODEL ; TREES ; PHOTOSYNTHESIS ; PROTECTION
WOS类目	Ecology
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/367999
作者单位	[Lawes, Michael J.] Univ KwaZulu Natal, Sch Life Sci, P Bag X01, ZA-3209 Scottsville, South Africa; [Woolley, Leigh-Ann] WWF Australia, Broome, WA, Australia; [Woolley, Leigh-Ann; Van Holsbeeck, Sam] Univ Sunshine Coast, Forest Res Inst, Maroochydore, Qld, Australia; [Murphy, Brett P.] Charles Darwin Univ, Res Inst Environm & Livelihoods, Darwin, NT, Australia; [Burrows, Geoffrey E.] Charles Sturt Univ, Sch Agr & Wine Sci, Wagga Wagga, NSW, Australia; [Midgley, Jeremy J.] Univ Cape Town, Dept Biol Sci, Cape Town, South Africa
推荐引用方式 GB/T 7714	Lawes, Michael J.,Woolley, Leigh-Ann,Van Holsbeeck, Sam,et al. Bark functional ecology and its influence on the distribution of Australian half-butt eucalypts[J],2021,46(7):1097-1111.
APA	Lawes, Michael J.,Woolley, Leigh-Ann,Van Holsbeeck, Sam,Murphy, Brett P.,Burrows, Geoffrey E.,&Midgley, Jeremy J..(2021).Bark functional ecology and its influence on the distribution of Australian half-butt eucalypts.AUSTRAL ECOLOGY,46(7),1097-1111.
MLA	Lawes, Michael J.,et al."Bark functional ecology and its influence on the distribution of Australian half-butt eucalypts".AUSTRAL ECOLOGY 46.7(2021):1097-1111.