Range expansion by Passer montanus in North America

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• 作者：J. L. Burnett ; C. P. Roberts ; C. R. Allen ; M. B. Brown…
• 关键词：Passer montanus ; Range expansion ; Spread ; Non ; indigenous ; Christmas Bird Count
• 刊名：Biological Invasions
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：19
• 期：1
• 页码：5-9
• 全文大小：
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Ecology; Freshwater & Marine Ecology; Plant Sciences; Developmental Biology;
• 出版者：Springer International Publishing
• ISSN：1573-1464
• 卷排序：19

文摘

Passer montanus became established in a small area of central North America following its introduction in 1870. P. montanus underwent minimal range expansion in the first 100 years following introduction. However, the North American population of P. montanus is now growing in size and expanding in geographic distribution, having expanded approximately 125 km to the north by 1970. We quantify the distance of spread by P. montanus from its introduction site in the greater St. Louis, Missouri-Illinois, USA area, using distributional (presence) data from the National Audubon Society Christmas Bird Count surveys for the period of 1951 to 2014. Linear regressions of the average annual range center of P. montanus confirmed significant shifts to the north at a rate of 3.3 km/year (P < 0.001) km/year. Linear regressions of the linear and angular distance of range center indicates significant northern movement (change in angle of mean range center; P < 0.001) since 1951. Our results quantify the extent of a northward range expansion, and suggesting a probable spread of this species northward.