气候变化领域集成服务门户(CCPortal): Competition drives the decline of a dominant midstorey tree species. Habitat implications for an endangered marsupial

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DOI	10.1016/j.foreco.2019.05.055
	Competition drives the decline of a dominant midstorey tree species. Habitat implications for an endangered marsupial
	Trouvé R.; Nitschke C.R.; Andrieux L.; Willersdorf T.; Robinson A.P.; Baker P.J.
发表日期	2019
ISSN	0378-1127
起始页码	26
结束页码	34
卷号	447
英文摘要	Context: Multi-species native forests are an important source of habitat for many plant and animal species. The dynamics of these forests are shaped by species-specific differences in growth, shade tolerance, life span, and other life-history traits, which lead to complex development patterns. Whether a particular forest stand is suitable habitat for a specific animal species may depend on various stand structural elements, which may vary in abundance due to stand dynamics, thereby generating temporal variability in habitat suitability. In the Central Highlands of Victoria, Australia, the critically endangered Leadbeater's possum (LBP) requires both a dense lower storey of Acacia spp. for foraging and suitable hollow-bearing trees (HBTs; primarily large eucalypts) for nesting. While most LBP habitat research has focused on the dynamics of HBTs, there are uncertainties about the extent to which the occurrence and abundance of Acacia spp. are affected by competition with eucalypts. Material and methods: We used 230 forest inventory plots to quantify how the abundance of Acacia dealbata, the most abundant of the Acacia species in these forests, varies with stand age and the abundance of overstorey eucalypts. We also took tree cores from 92 A. dealbata growing in either pure stands or stands mixed with eucalypts to test for the effects of tree age and eucalypt suppression on Acacia growth and decay patterns. Results: The frequency and abundance of A. dealbata decreased as stand age increased, but was strongly influenced by eucalypt basal area. When eucalypt basal area was >50m2/ha, Acacia was almost never present. In multi-species stands, Acacia grew more slowly (by a factor of 0.66, 95% credible interval 0.51–0.86) and was more likely to have internal decay (probability increased by 0.25; 0.07–0.48) than when grown in pure stands. Discussion: Acacia dealbata is a native pioneer species regenerating following fires. Eucalyptus overtop the Acacia after 8–10 years. The ensuing stand stratification leads to the decline and loss of the Acacia. We propose silvicultural approaches to slow Acacia decline and prolong the suitability of regrowth Eucalyptus stands as potential LBP habitat. © 2019
英文关键词	Acacia dealbata; Gymnobelideus leadbeateri; Habitat suitability; Leadbeater's possum; Mixed-species; Mountain ash; Multi-species; Silver wattle; Stand dynamics
语种	英语
scopus关键词	Animals; Dynamics; Ecosystems; Lead compounds; Acacia dealbata; Gymnobelideus leadbeateri; Habitat suitability; Leadbeater's possum; Mixed species; Mountain Ash; Multi species; Stand dynamics; Reforestation; abundance; ash; basal area; dicotyledon; endangered species; forest inventory; growth; habitat type; marsupial; pioneer species; population decline; regrowth; stand structure; stratification; Acacia Dealbata; Animals; Dynamics; Ecosystems; Lead Compounds; Sorbus; Australia; Central Highlands [Victoria]; Victoria [Australia]; Acacia; Acacia dealbata; Animalia; Eucalyptus; Gymnobelideus leadbeateri; Metatheria; Sorbus
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/155922
作者单位	School of Ecosystem and Forest Sciences, University of Melbourne, 500 Yarra Blvd, Richmond, Victoria 3121, Australia; Bordeaux Sciences Agro, Gradignan, 33175, France; CEBRA & School of Mathematics and Statistics, University of MelbourneVictoria 3010, Australia
推荐引用方式 GB/T 7714	Trouvé R.,Nitschke C.R.,Andrieux L.,et al. Competition drives the decline of a dominant midstorey tree species. Habitat implications for an endangered marsupial[J],2019,447.
APA	Trouvé R.,Nitschke C.R.,Andrieux L.,Willersdorf T.,Robinson A.P.,&Baker P.J..(2019).Competition drives the decline of a dominant midstorey tree species. Habitat implications for an endangered marsupial.Forest Ecology and Management,447.
MLA	Trouvé R.,et al."Competition drives the decline of a dominant midstorey tree species. Habitat implications for an endangered marsupial".Forest Ecology and Management 447(2019).