DOI: 10.1016/j.foreco.2015.11.007
Scopus记录号: 2-s2.0-84946867204
论文题名: Community structure and niche characteristics of upland and lowland western boreal birds at multiple spatial scales
作者: Mahon C.L. ; Holloway G. ; Sólymos Pé. ; Cumming S.G. ; Bayne E.M. ; Schmiegelow F.K.A. ; Song S.J.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 361 起始页码: 99
结束页码: 116
语种: 英语
英文关键词: Boreal birds
; Community structure
; Niche characteristics
; Niche position
; Oil sands areas
; Outlying Mean Index
Scopus关键词: Birds
; Conservation
; Ecology
; Forestry
; Hardwoods
; Landforms
; Oil sands
; Social sciences
; Boreal birds
; Community structures
; Mean indices
; Niche characteristics
; Niche position
; Ecosystems
; bird
; boreal forest
; community structure
; coniferous tree
; deciduous forest
; environmental disturbance
; human activity
; lowland environment
; nearest neighbor analysis
; niche
; population decline
; spatial distribution
; specialist
; specialization
; upland region
; Aves
; Coniferophyta
; Picea glauca
英文摘要: Direct and indirect effects of disturbance may cause the decline of specialist species and alter the condition of ecological communities. We characterized the community structure and niche characteristics (niche position, marginality, breadth) of upland and lowland boreal birds at scales relevant to both natural and human disturbance patterns in western boreal forests undergoing rapid and extensive multi-sector resource development. Our goal was to identify the degree of ecological specialization in order to inform activities directed at conserving a diversity of species (e.g. specialists and generalists) within the western boreal bird community. We used avian data (>5,220 point counts) and environmental variable data comprised of forest composition, stand, and landscape pattern metrics at local (7.1. ha), landscape (1,963. ha), and regional (11,310. ha) scales to determine boreal bird distribution and community-level associations using Canonical Correspondence Analysis (CCA) and Outlying Mean Index (OMI) analysis. OMI analysis explained a high proportion of variance in the dataset (71.8%) and separated boreal birds along two axes associated with moisture-productivity and age-structural complexity gradients. Niche position was influenced by local scale variables (height, age, area of mature-old forest, area of wet soil types), but also landscape and regional scale variables (total area of hardwood and conifer, mean nearest neighbour distance of conifer, and total core area of productive upland conifer). Only 15 of 67 species (22%) had marginal (atypical) niches and narrow niche breadths exhibiting specialization in old hardwood and white spruce forests and burned, open, and lowland habitats. Most species occupied typical or common habitats within the study area and exhibited generalist strategies typical of species in heterogeneous and disturbed habitats that undergo frequent change. Our results suggest the need to design and implement multi-species plans to conserve a diversity of western boreal bird species (e.g. specialists and generalists) at the regional scale. © 2015 . Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65135
Appears in Collections: 影响、适应和脆弱性
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作者单位: Environment Canada, Canadian Wildlife Service, Population Assessment Unit, Prairie and Northern Region, 9250-49th Street, Edmonton, AB, Canada; Boreal Avian Modelling Project, University of Alberta, 751 General Services Building, Edmonton, AB, Canada; Fiera Biological Consulting Limited, Suite 200, 10318-82 Avenue, Edmonton, AB, Canada
Recommended Citation:
Mahon C.L.,Holloway G.,Sólymos Pé.,et al. Community structure and niche characteristics of upland and lowland western boreal birds at multiple spatial scales[J]. Forest Ecology and Management,2016-01-01,361