气候变化领域集成服务门户(CCPortal): Timber harvest and frequent prescribed burning interact to affect the demography of Eucalypt species

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DOI	10.1016/j.foreco.2020.118463
	Timber harvest and frequent prescribed burning interact to affect the demography of Eucalypt species
	Watson G.M.; French K.; Collins L.
发表日期	2020
ISSN	0378-1127
卷号	475
英文摘要	Ecosystem management can negatively affect the demography of plant communities through the introduction of novel disturbance regimes. Prescribed burning and timber harvesting are two common and widely applied management strategies across forest ecosystems. Despite this, little is known about the long-term effects that these interacting disturbances have on forest demography. This study examined the effect of timber harvesting and frequent prescribed burning on the mortality, growth and regeneration of trees in a temperate eucalypt forest of south-eastern Australia. The study took place at a long-term experimental site, where experimental coupes were subjected to a one-off selective harvesting treatment (harvested, not harvested), followed by regimes of experimental burning (no fire, ~4 year burn intervals or ~2 year burn intervals) over a 22 year period. Tree communities were surveyed at permanent monitoring sites prior to the application of experimental treatments (1985 – 1989), and resurveyed post treatment (2016) to assess mortality, growth rates and ingrowth of trees >10 cm diameter at breast height. Harvesting directly removed ~40% of trees and indirectly increased the mortality of retained trees through damage (e.g. crown and bole breakage) caused during the harvesting operation. The likelihood of harvesting damage was greater for small trees and increased with harvesting intensity (i.e. the amount of timber removed). Frequent burning increased the likelihood of tree mortality on harvested sites, with large, old trees being particularly vulnerable. Growth rate and ingrowth of trees was elevated at harvested sites, increasing almost linearly with harvesting intensity, which suggests that competitive release had occurred. Fire frequency had no effect on growth rates or ingrowth of trees. This study highlights that frequent prescribed burning and selective timber harvesting can have additive effects on the loss of large trees, reducing the availability of these keystone habitat structures in intensively managed forest ecosystems. Although the elevated rates of growth and ingrowth may hasten the replacement of lost large trees, recovery will require long time frames. © 2020 Elsevier B.V.
英文关键词	Eucalypt forest; Fire frequency; Fuel reduction burning; Logging; Recruitment; Tree growth rate; Tree mortality
语种	英语
scopus关键词	Demography; Ecosystems; Harvesting; Logging (forestry); Population statistics; Timber; Diameter-at-breast heights; Ecosystem management; Habitat structures; Harvesting operations; Intensively managed forests; Management strategies; Selective harvesting; South-eastern Australia; Reforestation; demography; ecosystem management; forest ecosystem; mortality; prescribed burning; regeneration; timber harvesting; vulnerability; Ecosystems; Growth Rate; Harvesting; Mortality; Prescribed Burning; Reforestation; Sites; Trees; Australia
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/155017
作者单位	Centre for Sustainable Ecosystem Solutions, School of Earth, Atmospheric & Life Sciences, University of Wollongong, Wollongong, Australia; Department of Ecology, Environment & Evolution, La Trobe University, Bundoora, Victoria 3086, Australia; Arthur Rylah Institute for Environmental Research, Department of Environment, Land, Water and Planning, PO Box 137, Heidelberg, VIC 3084, Australia; Research Centre for Future Landscapes, La Trobe University, Bundoora, VIC 3086, Australia
推荐引用方式 GB/T 7714	Watson G.M.,French K.,Collins L.. Timber harvest and frequent prescribed burning interact to affect the demography of Eucalypt species[J],2020,475.
APA	Watson G.M.,French K.,&Collins L..(2020).Timber harvest and frequent prescribed burning interact to affect the demography of Eucalypt species.Forest Ecology and Management,475.
MLA	Watson G.M.,et al."Timber harvest and frequent prescribed burning interact to affect the demography of Eucalypt species".Forest Ecology and Management 475(2020).