, Volume 35, Issue 5, pp 1013–1019 | Cite as

Fate of 150 Year Old Beaver Ponds in the Laurentian Great Lakes Region

  • Carol A. JohnstonEmail author
Short Communication


The North American beaver, Castor canadensis, has recovered from historic overtrapping, recolonizing much of its former range as its population expanded. Previous studies using historical aerial photos document recent increases in number of beaver ponds, but the long-term sustainability of beaver populations and their ponds over centuries of landscape alteration is unknown. This paper analyzes the fate of beaver ponds mapped in 1868 near Ishpeming, Michigan, USA. Of the 64 beaver dam and pond sites mapped in the 1860s, 72 % were still discernible in 2014. Land use changes that altered the terrain (mining, residential development) or stream paths (channelization) were the main sources of beaver pond loss. This remarkable consistency in beaver pond placement over the last 150 years is evidence of the beaver’s resilience.


Castor canadensis Dam Stream Landscape Land use Ecological engineer 



Suggestions from four anonymous reviewers improved the quality of this manuscript. This work was supported by National Science Foundation grant DEB-1349240 and USDA Hatch Project H505-14.


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Copyright information

© Society of Wetland Scientists 2015

Authors and Affiliations

  1. 1.Department of Natural Resource ManagementSouth Dakota State UniversityBrookingsUSA

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