气候变化领域集成服务门户(CCPortal): A nutritional mechanism underpinning folivore occurrence in disturbed forests

CCPortal

DOI	10.1016/j.foreco.2019.117585
	A nutritional mechanism underpinning folivore occurrence in disturbed forests
	Au J.; Clark R.G.; Allen C.; Marsh K.J.; Foley W.J.; Youngentob K.N.
发表日期	2019
ISSN	0378-1127
卷号	453
英文摘要	Landscape disturbance can cause shifts in vegetation communities, which can impact animal populations. However, the processes responsible for the cascading effects between plants and animals are often poorly understood. We demonstrate a mechanism by which landscape disturbance can impact habitat quality by altering the nutritional composition of a forest using a case-study of koalas (Phascolarctos cinereus) in Australian eucalypt forests. We used two large datasets, a detailed survey of forest tree species composition and koala occurrence across 26,000 ha of forests on the South East Coast of Australia and an extensive eucalypt nutritional quality database, to investigate relationships among tree species composition, nutritional quality, and koala occurrence. Eucalyptus sieberi, a species native to the study area, responds well to disturbance and can increasingly dominate forests after logging and/or fire. Using negative binomial models, we found that observations of koala scat decreased as the proportion of E. sieberi in an area increased beyond zero. Eucalyptus sieberi had lower available nitrogen (AvailN) and total nitrogen than most other eucalypt species, and the highest concentrations of unsubstituted B-ring flavanones, an herbivore-deterrent plant secondary metabolite for the koala. Simulations of forests with increasing proportions of E. sieberi showed that AvailN decreased from 1.1% when E. sieberi was ≤10% of all eucalypts to 0.7% AvailN when E. sieberi was the only species present. Consequently, forests dominated by E. sieberi are unlikely to support koala populations based on existing knowledge of koala nutritional requirements. Foliage nutritional quality is a critical but often overlooked element of habitat quality for leaf eating animals, and this study demonstrates how disturbance related changes in tree species composition can impact the nutritional landscape and the occurrence of folivores. © 2019 Elsevier B.V.
英文关键词	Eucalyptus; Fire; Forestry; Herbivory; Koala; Logging
语种	英语
scopus关键词	Animals; Ecosystems; Fires; Forestry; Large dataset; Logging (forestry); Metabolites; Nitrogen; Eucalyptus; Herbivory; Koala; Negative binomial models; Nutritional compositions; Nutritional qualities; Plant secondary metabolites; Tree species composition; Plants (botany); food quality; forage; habitat quality; herbivore; landscape structure; marsupial; nitrogen compound; nutritional status; secondary metabolite; species richness; vegetation; Animals; Ecosystems; Eucalyptus; Fires; Forestry; Nitrogen; Australia; Animalia; Eucalyptus; Eucalyptus sieberi; Phascolarctidae; Phascolarctos cinereus
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/155715
作者单位	Research School of Biology, The Australian National University, Canberra, ACT 2601, Australia; Statistical Consulting Unit, The Australian National University, Canberra, ACT 2601, Australia; Ecosystems and Threatened Species, Office of Environment and Heritage, South East BranchNew South Wales, Australia
推荐引用方式 GB/T 7714	Au J.,Clark R.G.,Allen C.,et al. A nutritional mechanism underpinning folivore occurrence in disturbed forests[J],2019,453.
APA	Au J.,Clark R.G.,Allen C.,Marsh K.J.,Foley W.J.,&Youngentob K.N..(2019).A nutritional mechanism underpinning folivore occurrence in disturbed forests.Forest Ecology and Management,453.
MLA	Au J.,et al."A nutritional mechanism underpinning folivore occurrence in disturbed forests".Forest Ecology and Management 453(2019).