DOI: 10.1016/j.foreco.2013.06.037
Scopus记录号: 2-s2.0-84880613371
论文题名: Response of brown-headed cowbirds and three host species to thinning treatments in low-elevation ponderosa pine forests along the northern Colorado Front Range
作者: Keeley W.H. ; Germaine S.S. ; Stanley T.R. ; Spaulding S.E. ; Wanner C.E.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2013
卷: 306 起始页码: 226
结束页码: 233
语种: 英语
英文关键词: Cowbird
; Forest thinning
; Host species
; Occupancy
; Pinus ponderosa
; Ponderosa pine
Scopus关键词: Cowbird
; Forest thinnings
; Host species
; Occupancy
; Pinus ponderosa
; Ponderosa pines
; Animals
; Forestry
; coniferous forest
; cost-benefit analysis
; forest management
; management practice
; recruitment (population dynamics)
; seedling
; songbird
; stand structure
; thinning
; wildfire
; Animals
; Forests
; Pinus Ponderosa
; Thinning
; Colorado
; Front Range
; Rocky Mountains
; United States
英文摘要: Thinning ponderosa pine (Pinus ponderosa) forests to achieve desired ecological conditions remains a priority in the North American west. In addition to reducing the risk of high-severity wildfires in unwanted areas, stand thinning may increase wildlife and plant diversity and provide increased opportunity for seedling recruitment. We initiated conservative (i.e. minimal removal of trees) ponderosa stand thinning treatments with the goals of reducing fire risk and improving habitat conditions for native wildlife and flora. We then compared site occupancy of brown-headed cowbirds (Molothrus ater), chipping sparrows (Spizella passerina), plumbeous vireos (Vireo plumbeus), and western wood-pewees (Contopus sordidulus) in thinned and unthinned (i.e., control) forest stands from 2007 to 2009. Survey stations located in thinned stands had 64% fewer trees/ha, 25% less canopy cover, and 23% less basal area than stations in control stands. Occupancy by all three host species was negatively associated with tree density, suggesting that these species respond favorably to forest thinning treatments in ponderosa pine forests. We also encountered plumbeous vireos more frequently in plots closer to an ecotonal (forest/grassland) edge, an association that may increase their susceptibility to edge-specialist, brood parasites like brown-headed cowbirds. Occupancy of brown-headed cowbirds was not related to forest metrics but was related to occupancy by plumbeous vireos and the other host species in aggregate, supporting previous reports on the affiliation between these species. Forest management practices that promote heterogeneity in forest stand structure may benefit songbird populations in our area, but these treatments may also confer costs associated with increased cowbird occupancy. Further research is required to understand more on the complex relationships between occupancy of cowbirds and host species, and between cowbird occupancy and realized rates of nest parasitism. © 2013 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66402
Appears in Collections: 影响、适应和脆弱性
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作者单位: City of Boulder Open Space and Mountain Parks, 66 S. Cherryvale Road, Boulder, CO 80303, United States; US Geological Survey Fort Collins Science Center, 2150 Centre Avenue, Building C, Fort Collins, CO 80526, United States; Boulder County Parks and Open Space, 5201 Saint Vrain Road, Longmont, CO 80503, United States
Recommended Citation:
Keeley W.H.,Germaine S.S.,Stanley T.R.,et al. Response of brown-headed cowbirds and three host species to thinning treatments in low-elevation ponderosa pine forests along the northern Colorado Front Range[J]. Forest Ecology and Management,2013-01-01,306