DOI: 10.1016/j.foreco.2014.02.019
Scopus记录号: 2-s2.0-84895753637
论文题名: Differential demographic responses of sympatric Parids to vegetation management in boreal forest
作者: Eggers S. ; Low M.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2014
卷: 319 起始页码: 169
结束页码: 175
语种: 英语
英文关键词: Commercial thinning
; Niche diversity
; Parids
; Social dominance
; Variable density thinning
; Vegetation management
Scopus关键词: Biodiversity
; Commercial thinning
; Niche diversity
; Parids
; Social dominance
; Variable density
; Vegetation management
; Forestry
; adult
; bird
; boreal forest
; coexistence
; demographic method
; dominance
; forest management
; habitat fragmentation
; population decline
; population density
; survivorship
; sympatry
; understory
; vegetation structure
; Biodiversity
; Forestry
; Plants
; Thinning
英文摘要: Large-scale removal of small-diameter trees (i.e. thinning from below) in boreal forest can diminish niche diversity for birds that rely on a well-developed understory for nesting and foraging. Yet, few studies have examined how reduced niche diversity in managed forests affects fitness measures in closely-related species and the ability of competing species to co-exist. We related forest thinning to population trends of the willow tit Poecile montana (declining) and its dominant competitor the crested tit Lophophanes cristatus (stable), and conducted a 3-year comparative study to determine how variation in understory spruce density differentially influences survival and reproduction in these species. In line with our prediction that crested tits would gain resource priority under conditions of reduced forest understory complexity, willow tits and their nestlings suffered a disproportionate decline in both nest and adult survival prospects relative to crested tits as understory spruce density declined. Willow tits also had increased numbers of tail feather fault bars with decreasing understory complexity, further supporting the idea that willow tits suffer from food shortage and increased predation risk in areas of reduced understory. The long-term population declines of willow tits in boreal forest appears linked to large scale harvest of small-diameter spruce trees that provide important understory vegetation. A patchy arrangement of different thinning treatments through 'Understory Retention Thinning' (URT) may provide a cost-effective way to restore long-term structural complexity and biodiversity in densely stocked conifer stands. © 2014. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66038
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Ecology, Swedish University of Agricultural Sciences, Box 7044, SE-75007 Uppsala, Sweden; Population Biology and Conservation Biology, Department of Ecology and Evolution, Evolutionary Biology Centre, Uppsala University, SE-752 36 Uppsala, Sweden
Recommended Citation:
Eggers S.,Low M.. Differential demographic responses of sympatric Parids to vegetation management in boreal forest[J]. Forest Ecology and Management,2014-01-01,319