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Beaver (Castor canadensis) mitigate the effects of climate on the area of open water in boreal wetlands in western Canada
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Shallow open water wetlands provide critical habitat for numerous species, yet they have become increasingly vulnerable to drought and warming temperatures and are often reduced in size and depth or disappear during drought. We examined how temperature, precipitation and beaver (Castor canadensis) activity influenced the area of open water in wetlands over a 54- year period in the mixed-wood boreal region of east-central Alberta, Canada. This entire glacial landscape with intermittently connected drainage patterns and shallow wetland lakes with few streams lost all beaver in the 19th century, with beaver returning to the study area in 1954. We assessed the area of open water in wetlands using 12 aerial photo mosaics from 1948 to 2002, which covered wet and dry periods, when beaver were absent on the landscape to a time when they had become well established. The number of active beaver lodges explained over 80% of the variability in the area of open water during that period. Temperature, precipitation and climatic variables were much less important than beaver in maintaining open water areas. In addition, during wet and dry years, the presence of beaver was associated with a 9-fold increase in open water area when compared to a period when beaver were absent from those same sites. Thus, beaver have a dramatic influence on the creation and maintenance of wetlands even during extreme drought. Given the important role of bea- ver in wetland preservation and in light of a drying climate in this region, their removal should be considered a wetland disturbance that should be avoided.
Beaver
Castor canadensis
Drought East-central Alberta Elk Island National Park Mixed-wood boreal Wetland conservation
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Resources
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Climate Science Documents
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Ensuring Climate Resilient Aquatic Communities
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Partners of the Appalachian LCC presented the “Riparian Restoration Climate Change Resilience Tool” to the aquatic management and research community at the Annual Eastern Brook Trout Joint Venture (EBTJV) meeting in early September.
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News & Events
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Riparian Prioritization and Status Assessment for Climate Change Resilience of Coldwater Stream Habitats within the Appalachian and Northeastern Regions
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Among a host of other critical ecosystem functions, intact riparian forests can help to reduce vulnerability of coldwater stream habitats to warming regional temperatures. Restoring and conserving these forests can therefore be an important part of regional and landscape-scale conservation plans, but managers need science and decision-support tools to help determine when these actions will be most effective. To help fill this need, we developed the Riparian Prioritization for Climate Change Resilience (RPCCR) web-based decision support tool to quickly and easily identify, based on current riparian cover and predicted vulnerability to air temperature warming, sites that are priority candidates for riparian restoration and conservation.
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Research
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Riparian Restoration
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Riparian Restoration to Promote Climate Change Resilience Tool
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An innovative riparian planting and restoration decision support tool, funded by the Appalachian LCC, is now available to the conservation community. This user-friendly tool allows managers and decision-makers to rapidly identify and prioritize areas along the banks of rivers, streams, and lakes for restoration, making these ecosystems more resilient to disturbance and future changes in climate. It will also help the conservation community invest limited conservation dollars wisely, helping to deliver sustainable resources.
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Research
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Riparian Restoration
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Report: Riparian Prioritization and Status Assessment for Climate Change Resilience of Coldwater Stream Habitats within the Appalachian and Northeastern Regions
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Among a host of other critical ecosystem functions, intact riparian forests can help to reduce vulnerability of coldwater stream habitats to warming regional temperatures. Restoring and conserving these forests can therefore be an important part of regional and landscape-scale conservation plans, but managers need science and decision-support tools to help determine when these actions will be most effective. To help fill this need, we developed the Riparian Prioritization for Climate Change Resilience (RPCCR) web-based decision support tool to quickly and easily identify, based on current riparian cover and predicted vulnerability to air temperature warming, sites that are priority candidates for riparian restoration and conservation.
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Tools & Resources
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Riparian Restoration Decision Support Tool
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Riparian Restoration Appendix 1: Canopy Cover Statistics
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Canopy Cover by State.
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Research
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Riparian Restoration
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Riparian Restoration Appendix 1: Canopy Cover Statistics
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Canopy Cover by State.
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Tools & Resources
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Riparian Restoration Decision Support Tool
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Reparian Restoration Image Aug 2014
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Image RPCCR
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Tools & Resources
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FY2015 Brook Trout Conservation Funding Opportunity
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The Eastern Brook Trout Joint Venture (EBTJV) is seeking project proposals focused on conserving the habitats needed to support healthy and productive wild Brook Trout populations.
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News & Events
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Riparian Restoration Decision Support Tool
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An innovative riparian planting and restoration decision support tool is now available to the conservation community. This user-friendly tool allows managers and decision-makers to rapidly identify and prioritize areas along the banks of rivers, streams, and lakes for restoration, making these ecosystems more resilient to disturbance and future changes in climate. It will also help the conservation community invest limited conservation dollars wisely, helping to deliver sustainable resources.
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Tools & Resources
