Distribution of Bicknell's thrush in New England and New York.: An article from: Wilson Bulletin
Book Details
Author(s)Jonathan L. Atwood, Christopher C. Rimmer, Kent P. McFarland, Sophia H. Tsai, Laura R. Nagy
PublisherWilson Ornithological Society
ISBN / ASINB00096PS1Q
ISBN-13978B00096PS16
MarketplaceFrance 🇫🇷
Description
This digital document is an article from Wilson Bulletin, published by Wilson Ornithological Society on December 1, 1996. The length of the article is 3564 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.
From the author: We conducted presence-absence surveys for Bicknell's Thrush (Catharus bicknelli) in Marine, Massachusetts, New Hampshire, New York, and Vermont during the 1992-1995 breeding seasons. The species was found at 234 sites, of which 225 (96%) were dominated by varying mixtures of balsam fir (Abies balsamea) and red spruce (Picea rubens). Ninety-one percent of the occupied sites were [greater than or equal to]915 m (3000 ft) in elevation. Size of occupied habitat patches was generally small; 73% of occupied areas delimited by the 915 m elevation contour were less than 1000 ha in extent. A logistic regression model using independent variables describing vegetation, elevation, land area [greater than or equal to]915 m located within 1 km of a site, and latitude successfully predicted thrush presence. There was no conclusive evidence of widespread population declines of Bicknell's Thrush in the United States; we found the species at 63 of 73 sites (86%) known to have been occupied prior to 1992. However, the restricted breeding distribution and narrow habitat requirements of Bicknell's Thrush in the United States suggest that it is vulnerable to habitat loss and degradation, and that continued efforts to document the species' status and ecology are warranted.
Citation Details
Title: Distribution of Bicknell's thrush in New England and New York.
Author: Jonathan L. Atwood
Publication:Wilson Bulletin (Refereed)
Date: December 1, 1996
Publisher: Wilson Ornithological Society
Volume: v108 Issue: n4 Page: p650(12)
Distributed by Thomson Gale
From the author: We conducted presence-absence surveys for Bicknell's Thrush (Catharus bicknelli) in Marine, Massachusetts, New Hampshire, New York, and Vermont during the 1992-1995 breeding seasons. The species was found at 234 sites, of which 225 (96%) were dominated by varying mixtures of balsam fir (Abies balsamea) and red spruce (Picea rubens). Ninety-one percent of the occupied sites were [greater than or equal to]915 m (3000 ft) in elevation. Size of occupied habitat patches was generally small; 73% of occupied areas delimited by the 915 m elevation contour were less than 1000 ha in extent. A logistic regression model using independent variables describing vegetation, elevation, land area [greater than or equal to]915 m located within 1 km of a site, and latitude successfully predicted thrush presence. There was no conclusive evidence of widespread population declines of Bicknell's Thrush in the United States; we found the species at 63 of 73 sites (86%) known to have been occupied prior to 1992. However, the restricted breeding distribution and narrow habitat requirements of Bicknell's Thrush in the United States suggest that it is vulnerable to habitat loss and degradation, and that continued efforts to document the species' status and ecology are warranted.
Citation Details
Title: Distribution of Bicknell's thrush in New England and New York.
Author: Jonathan L. Atwood
Publication:Wilson Bulletin (Refereed)
Date: December 1, 1996
Publisher: Wilson Ornithological Society
Volume: v108 Issue: n4 Page: p650(12)
Distributed by Thomson Gale
