干旱区生态环境知识资源中心(Arid): Phyllode fall and nutrient content in a mulga (Acacia aneura F.Muell. ex Benth.) community in central Australia in response to rainfall

Arid

DOI	10.1071/RJ21007
	Phyllode fall and nutrient content in a mulga (Acacia aneura F.Muell. ex Benth.) community in central Australia in response to rainfall
	Turner, J. C.; Friedel, M. H.; Neumann, M.
通讯作者	Friedel, MH (corresponding author), Charles Darwin Univ, Res Inst Environm & Livelihoods, Grevillea Dr, Alice Springs, NT 0870, Australia.
来源期刊	RANGELAND JOURNAL
ISSN	1036-9872
EISSN	1834-7541
出版年	2021
英文摘要	The fall of phyllodes from Acacia aneura F.Muell. ex Benth. (mulga) in central Australia was studied over 22 months from mid-1958 at four locations within a livestock reserve north of Alice Springs in the Northern Territory, in order to identify rainfall or seasonal triggers. Phyllode fall increased by at least an order of magnitude for short periods following rain of 15-20 mm or more on a 'mature' mulga site and similar trends were apparent for 'young' and 'desert form' mulga on the same site, and on a second, independent, 'mature' site. When rates of phyllode fall were high after substantial rain, at both 'mature' locations, similar to 30% of nitrogen and similar to 50% of phosphorus were withdrawn before abscission, suggesting that mulga was markedly conservative of these nutrients. Conversely, under dry conditions, when phyllode fall was relatively low (<200 mg m(-2) day(-1)), concentrations of nitrogen and phosphorus in fallen phyllodes were higher. Concentrations of potassium, calcium, magnesium and sodium did not vary consistently with increasing rate of phyllode fall, although overall levels of calcium and potassium were considerably higher in the second 'mature' location. This legacy study is of renewed interest given the potential of mulga communities to contribute to national carbon stocks, and the consequent need for robust field-based data on growth dynamics and carbon fluxes.
英文关键词	litterfall arid shrubland nitrogen phosphorus nutrient withdrawal carbon sequestration rainfall trigger
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000652857500001
WOS关键词	LITTERFALL ; FORESTS ; CARBON ; PLANTATION ; WOODLANDS ; TREES
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/2XILL650/352445
作者单位	[Friedel, M. H.] Charles Darwin Univ, Res Inst Environm & Livelihoods, Grevillea Dr, Alice Springs, NT 0870, Australia; [Neumann, M.] Swinburne Univ Technol, Fac Sci Engn & Technol, Dept Chem & Biotechnol, Hawthorn, Vic 3122, Australia; [Neumann, M.] Univ Nat Resources & Life Sci, Inst Silviculture, A-1190 Vienna, Austria
推荐引用方式 GB/T 7714	Turner, J. C.,Friedel, M. H.,Neumann, M.. Phyllode fall and nutrient content in a mulga (Acacia aneura F.Muell. ex Benth.) community in central Australia in response to rainfall[J],2021.
APA	Turner, J. C.,Friedel, M. H.,&Neumann, M..(2021).Phyllode fall and nutrient content in a mulga (Acacia aneura F.Muell. ex Benth.) community in central Australia in response to rainfall.RANGELAND JOURNAL.
MLA	Turner, J. C.,et al."Phyllode fall and nutrient content in a mulga (Acacia aneura F.Muell. ex Benth.) community in central Australia in response to rainfall".RANGELAND JOURNAL (2021).