气候变化领域集成服务门户(CCPortal): Livestock and kangaroo grazing have little effect on biomass and fuel hazard in semi-arid woodlands

CCPortal

DOI	10.1016/j.foreco.2020.118165
	Livestock and kangaroo grazing have little effect on biomass and fuel hazard in semi-arid woodlands
	Travers S.K.; Eldridge D.J.; Koen T.B.; Val J.; Oliver I.
发表日期	2020
ISSN	0378-1127
卷号	467
英文摘要	Using livestock grazing as a tool to manage biomass and reduce fuel hazard has gained widespread popularity, but examples from across the globe demonstrate that it often yields mixed, context-dependent results. Grazing has potential to deliver practical solutions in systems where grazing reduces not only biomass but also reduces fuel hazard by altering vegetation connectivity or composition. We assessed the extent to which recent rainfall, rabbit and kangaroo grazing and recent and historic livestock grazing alters and accounts for variation in above-ground biomass, biomass composition and fuel hazard ratings across three broad communities in eastern Australia. We used nested linear models to assess biomass in three vertical vegetation strata, that matched the strata assessed in the Overall Fuel Hazard Assessment guide (i.e. litter/surface fuel; groundstorey vegetation/near surface fuel; and midstorey vegetation/elevated fuel) and Ordinal Logistic Regression to assess categorical fuel hazard ratings. Only recent kangaroo grazing reduced groundstorey biomass across all communities. Kangaroo grazing altered litter mass and significantly reduced surface fuel hazard in one community. Recent livestock grazing did not reduce fuel hazard, and despite significantly reducing half of our measures of biomass, these were not practical reductions. For instance, livestock grazing significantly reduced litter mass, however our model predicts that doubling our assessment of livestock grazing intensity only reduces total litter mass by 0.8%, or 8 kg per hectare in landscapes where average litter loads ranged from 3600 to 12,600 kg per hectare. Furthermore, long-term livestock grazing increased shrub biomass and in one community this increased elevated fuel hazard. There were few effects of rabbits. The effects of rainfall on biomass were up to an order of magnitude greater than any effects due to grazing, despite sampling during relatively average rainfall conditions. Our data suggest that management practices that seek to use livestock grazing to reduce biomass or its connectivity in these systems will not achieve practical reductions in biomass and or fuel hazard. © 2020 The Authors
英文关键词	Cattle; Fire hazard; Fire management; Fuel load; Ordinal logistic regression; Sheep
语种	英语
scopus关键词	Agriculture; Biomass; Fuels; Information management; Logistic regression; Rain; Vegetation; Above ground biomass; Biomass compositions; Effects of rainfalls; Fuel hazard ratings; Management practices; Ordinal logistic regression; Practical solutions; Rainfall condition; Biohazards; aboveground biomass; community structure; connectivity; grazing; hazard assessment; lagomorph; litter; livestock; management practice; plant community; semiarid region; ungulate; vegetation dynamics; woodland; Agriculture; Animals; Biomass; Fuels; Plants; Rain; Surfaces; Australia; Bos; Oryctolagus cuniculus; Ovis aries
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/155266
作者单位	Centre for Ecosystem Science, School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, NSW 2052, Australia; Department of Planning, Industry and Environment, C/O Centre for Ecosystem Science, School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, NSW 2052, Australia; Department of Planning, Industry and Environment, P.O. Box 445, Cowra, NSW 2794, Australia; Department of Planning, Industry and Environment, P.O. Box 363, Buronga, NSW 2739, Australia; Department of Planning, Industry and Environment, P.O. Box 1477, Gosford, NSW 2250, Australia
推荐引用方式 GB/T 7714	Travers S.K.,Eldridge D.J.,Koen T.B.,et al. Livestock and kangaroo grazing have little effect on biomass and fuel hazard in semi-arid woodlands[J],2020,467.
APA	Travers S.K.,Eldridge D.J.,Koen T.B.,Val J.,&Oliver I..(2020).Livestock and kangaroo grazing have little effect on biomass and fuel hazard in semi-arid woodlands.Forest Ecology and Management,467.
MLA	Travers S.K.,et al."Livestock and kangaroo grazing have little effect on biomass and fuel hazard in semi-arid woodlands".Forest Ecology and Management 467(2020).