气候变化领域集成服务门户(CCPortal): Effectiveness and impacts of girdling treatments in a conifer-encroached Oregon white oak woodland

CCPortal

DOI	10.1016/j.foreco.2019.05.059
	Effectiveness and impacts of girdling treatments in a conifer-encroached Oregon white oak woodland
	Kane J.M.; Engber E.A.; McClelland J.E.
发表日期	2019
ISSN	0378-1127
起始页码	77
结束页码	86
卷号	447
英文摘要	The prolonged absence of fire in Oregon white oak (Quercus garryana)woodlands and savannas of the Pacific Northwest has resulted in substantial conifer encroachment over the past century. Use of low intensity prescribed burns often lacks sufficient intensity to kill larger encroached trees, requiring alternative approaches. In the Bald Hills region of Redwood National Park, managers have implemented girdling treatments to kill Douglas-fir (Pseudotsuga menziesii)over the past two decades with the objective of recovering remnant oaks and restoring historical woodland area. We surveyed 258 girdled Douglas-fir to examine the effectiveness of girdling treatments to create snags and the impacts of girdling on tree regeneration and fuel recruitment over a 17 year time since girdling chronosequence. Girdling was successful in killing 91% of the treated Douglas-fir independent of the method used (axe or chainsaw). Larger trees with a low girdle width-to-tree diameter ratio tended to survive girdling. Trees with a girdle width-to-tree diameter ratio ≥1 were most effective at killing trees. Snags generated through girdling decayed over time but did not significantly reduce in height over the time period examined. Bird activity was observed on 19% of snags across the chronosequence but 88% of 10 y old snags had signs of bird foraging. Fine woody fuel loading and fuelbed depths were potentially elevated 7 years after treatment but did not persist through the time period examined. Regeneration of Douglas-fir and oaks were highly variable and did not seem to be clearly linked to girdling activity. Our results indicate that girdling is a highly effective treatment to kill Douglas-fir and aid restoration of Oregon oak woodlands with limited negative impacts on surface fuel hazards or regeneration. © 2019
英文关键词	Douglas-fir; Fuel loading; Pseudotsuga menziesii; Quercus garryana; Regeneration; Restoration; Snags; Tree mortality
语种	英语
scopus关键词	Birds; Fuels; Image reconstruction; Restoration; Douglas fir; Fuel loading; Pseudotsuga menziesii; Quercus; Regeneration; Snags; Tree mortality; Reforestation; chronosequence; coniferous forest; deciduous forest; habitat restoration; prescribed burning; recruitment (population dynamics); regrowth; restoration ecology; snag; woodland; Birds; Fuels; Pseudotsuga Menziesii; Quercus; Restoration; California; Pacific Northwest; Redwood National Park; United States; Aves; Coniferophyta; Pseudotsuga; Pseudotsuga menziesii; Quercus; Quercus garryana
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/155905
作者单位	Department of Forestry & Wildland Resources, Humboldt State University, One Harpst Street, Arcata, CA 95521, United States; Redwood National Park, 121200 Highway 101, OrickCA 95555, United States
推荐引用方式 GB/T 7714	Kane J.M.,Engber E.A.,McClelland J.E.. Effectiveness and impacts of girdling treatments in a conifer-encroached Oregon white oak woodland[J],2019,447.
APA	Kane J.M.,Engber E.A.,&McClelland J.E..(2019).Effectiveness and impacts of girdling treatments in a conifer-encroached Oregon white oak woodland.Forest Ecology and Management,447.
MLA	Kane J.M.,et al."Effectiveness and impacts of girdling treatments in a conifer-encroached Oregon white oak woodland".Forest Ecology and Management 447(2019).