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Planning for Growth and Open Space Conservation Webinar Series
A discussion of the programs the Forest Service utilizes to preserve open space through conservation easements and land acquisitions.
Located in News & Events
Person Pascal source code Pollock, Mike
Located in Expertise Search
Person Pomara, Lars
Located in Expertise Search
Person Troff document Post, Anne
Located in Expertise Search
Poster Session: 2016 Spotlight on National Parks
Located in National Park Service Spotlights / 2016 Spotlight on National Park Resources
File D source code Pragmatic population viability targets in a rapidly changing world
To ensure both long-term persistence and evolutionary potential, the required number of individuals in a population often greatly exceeds the targets proposed by conservation management. We critically review minimum population size requirements for species based on empirical and theoretical estimates made over the past few decades. This literature collectively shows that thousands (not hundreds) of individuals are required for a population to have an acceptable probability of riding-out environmental fluctuation and catastrophic events, and ensuring the continuation of evolutionary processes. The evidence is clear, yet conservation policy does not appear to reflect these findings, with pragmatic concerns on feasibility over-riding biological risk assessment. As such, we argue that conservation biology faces a dilemma akin to those working on the physical basis of climate change, where scientific recommendations on carbon emission reductions are compromised by policy makers. There is no obvious resolution other than a more explicit acceptance of the trade-offs implied when population viability requirements are ignored. We rec- ommend that conservation planners include demographic and genetic thresholds in their assessments, and recognise implicit triage where these are not met.
Located in Resources / General Resources Holdings
File Pre-Meeting Meeting Sphere Test Link
To make sure everyone will be able to log onto the Meeting Sphere site.
Located in Cooperative / / SC Meeting & Workshop, April 22-24, 2013 / Group Solutions Materials
HTML Tile Predicting Vulnerability to Sea Level Rise
Located in LP Members / Organizations Search / National Park Service: National Capital Region
Prescribed Fire and Bats Webinar
With bat populations declining due to white-nose syndrome and other factors, it is critical to strike a balance between the use of prescribed fire for managing natural areas and the need to protect bats and their critical habitats.
Located in News & Events / Events
Presentations on National Park Resources
Located in National Park Service Spotlights / 2016 Spotlight on National Park Resources