DOI: 10.1016/j.foreco.2014.08.027
Scopus记录号: 2-s2.0-84908065887
论文题名: Occurrence patterns and niche relationships of sympatric owls in South American temperate forests: A multi-scale approach
作者: Ibarra J.T. ; Martin K. ; Drever M.C. ; Vergara G.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2014
卷: 331 起始页码: 281
结束页码: 291
语种: 英语
英文关键词: Detectability
; Generalists
; Glaucidium nana
; Habitat suitability models
; Specialists
; Strix rufipes
Scopus关键词: Detectability
; Generalists
; Glaucidium nana
; Habitat suitability model
; Specialists
; Strix rufipes
; endangered species
; forest cover
; niche breadth
; population distribution
; raptor
; resource use
; specialist
; species occurrence
; sympatry
; temperate forest
; South America
; Glaucidium (Aves)
; Strigiformes
; Strix rufipes
英文摘要: Habitat-specialists have narrower niches, but achieve higher or similar peak performance (e.g. occurrence probability, ψ) than habitat-generalists along resource gradients that may be selected from the stand- to landscape-levels. Understanding the relationship between niche width and ψ of forest owls will facilitate the development of appropriate management recommendations for their conservation. We assessed ψ of the threatened habitat-specialist rufous-legged owls (. Strix rufipes) and habitat-generalist austral pygmy-owls (. Glaucidium nana) across three spatial scales, and tested whether they differed in resource utilization and peak ψ in temperate forests of southern Chile. We conducted 1145 broadcast surveys at 101 sites and used multi-season occupancy models, accounting for imperfect detection, to estimate ψ. For S. rufipes, ψ ranged between 0.05 and 1 across sites, and was positively associated with the variability (standard deviation, SD) in diameter at breast height (DBH) of trees and bamboo understory density. For G. nana, ψ ranged between 0.67 and 0.98, and was positively associated with forest-patch shape index (irregularity and edge effects) and forest cover at 180. ha, although the parameter estimates were imprecise. Relative to G. nana, S. rufipes had lower total resource utilization due to lower ψ over gradients of all covariates, but achieved similar peak ψ for resources related with stand-level forest complexity and forest stability at the landscape scale. Occurrence of habitat-specialist owls will be promoted if multi-aged stands with a variety of tree sizes (SD of DBH. =. 19.9. ±. 9. cm), including large old-growth trees, with relatively high bamboo cover (34.2. ±. 26.6%), are retained. Landscapes with forest cover >63.5% would also favor occurrence by habitat-specialist owls. © 2014 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65740
Appears in Collections: 影响、适应和脆弱性
There are no files associated with this item.
作者单位: Centre for Applied Conservation Research, Department of Forest and Conservation Sciences, University of British Columbia, 2424 Main Mall, Vancouver, BC, Canada; The Peregrine Fund, 5668 W Flying Hawk Lane, Boise, ID, United States; Environment Canada, Pacific Wildlife Research Centre, 5421 Robertson Road, Delta, BC, Canada; Institute of Geography, School of History, Geography and Political Sciences, Pontificia Universidad Católica de Chile, Vicuña Mackenna 4860, P.O. Box 306-22, Macul, Santiago, Chile; Centro de Estudio y Conservación del Patrimonio Natural (CECPAN), Pedro Montt 549, Ancud, Región de Los Lagos P.C., Chile
Recommended Citation:
Ibarra J.T.,Martin K.,Drever M.C.,et al. Occurrence patterns and niche relationships of sympatric owls in South American temperate forests: A multi-scale approach[J]. Forest Ecology and Management,2014-01-01,331