文章基本信息

标题：The role of interspecific competition at woodpecker nest sites: comparing burn versus unburned treatments in the Black Hills, SD. (Social Science, Environmental, Field Biology Poster Session 02:00 PM-03:00 PM).
作者：Brown, Ian M. ; Vierling, Kerri T. ; Gentry, Dale 等
期刊名称：The Ohio Journal of Science
印刷版ISSN：0030-0950
出版年度：2003
期号：March
语种：English
出版社：Ohio Academy of Science
摘要：Woodpeckers play an essential role in forest ecosystems since their abandoned cavities provide shelter and nest sites for many bird and woodpecker species. Suitable nest cavities are limited and frequently are the focus of intense interspecific competition. The presence of dead trees (snags) are an important component of forest ecosystems since their presence is often tied to an increase in the abundance of many woodpecker species. The focus the research was to compare woodpecker preferences for nesting in burned versus unburned sites in southwestern South Dakota, and to determine whether fire suppression promotes competition among cavity-nesting species. Active woodpecker cavities were located by following adults to their nest and through vocalizations. Locations of active nest trees were recorded with a Global Positioning System unit and the nest contents were monitored every. 2-3 days with an extended cavity viewer. In addition, each cavity was observed between 0600-1500 hours for a minimum of 30 minutes during each visit. All interspecific competitive encounters among woodpecker and/or other species were tallied during each visit. The most predominant species on burned sites were redheaded (Melanerpes erythrocephalus) (26%) and Lewis' woodpeckers (Melanerpes lewis) (53%), while the predominant species on unburned sites were red-breasted nuthatches (Sitta canadensis) (25%) and hairy woodpeckers (Picoides villous) (50%). The number of competitive interactions (N= 1-25) of all woodpecker species at nest trees on burned sites (69%) was significantly greater (P < 0.05) than on unburned areas. These data suggest that the Lewis' and red-headed woodpeckers showed a preference for nesting in recently burned areas which were more open, while red-breasted nuthatches preferred unburned areas with a greater understory and fewer snags.
关键词：Environmental research;Woodpeckers

The role of interspecific competition at woodpecker nest sites: comparing burn versus unburned treatments in the Black Hills, SD. (Social Science, Environmental, Field Biology Poster Session 02:00 PM-03:00 PM).

Brown, Ian M. ; Vierling, Kerri T. ; Gentry, Dale 等

BOARD 15

Woodpeckers play an essential role in forest ecosystems since their abandoned cavities provide shelter and nest sites for many bird and woodpecker species. Suitable nest cavities are limited and frequently are the focus of intense interspecific competition. The presence of dead trees (snags) are an important component of forest ecosystems since their presence is often tied to an increase in the abundance of many woodpecker species. The focus the research was to compare woodpecker preferences for nesting in burned versus unburned sites in southwestern South Dakota, and to determine whether fire suppression promotes competition among cavity-nesting species. Active woodpecker cavities were located by following adults to their nest and through vocalizations. Locations of active nest trees were recorded with a Global Positioning System unit and the nest contents were monitored every. 2-3 days with an extended cavity viewer. In addition, each cavity was observed between 0600-1500 hours for a minimum of 30 minutes during each visit. All interspecific competitive encounters among woodpecker and/or other species were tallied during each visit. The most predominant species on burned sites were redheaded (Melanerpes erythrocephalus) (26%) and Lewis' woodpeckers (Melanerpes lewis) (53%), while the predominant species on unburned sites were red-breasted nuthatches (Sitta canadensis) (25%) and hairy woodpeckers (Picoides villous) (50%). The number of competitive interactions (N= 1-25) of all woodpecker species at nest trees on burned sites (69%) was significantly greater (P < 0.05) than on unburned areas. These data suggest that the Lewis' and red-headed woodpeckers showed a preference for nesting in recently burned areas which were more open, while red-breasted nuthatches preferred unburned areas with a greater understory and fewer snags.

IAN M. BROWN IBROWN@MUSKINGUM.EDU, KERRI T. VIERLING KERRI.VIERLING@SDSMT.EDU, DALE GENTRY GYRDALE@HOTMAIL.COM, MUSKINGUM COLLEGE, DEPT OF BIOLOGY, NEW CONCORD OH 43762, AND SOUTH DAKOTA SCHOOL OF MINES AND TECHNOLOGY.