north american bat monitoring program (nabat). core team & supporters susan loeb, usfs-srs...
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Core Team & Supporters
• Susan Loeb, USFS-SRS• Jeremy Coleman, USFWS• Laura Ellison, USGS• Tom Rodhouse, NPS• Tom Ingersoll, DoD• Cori Lausen, WCS Canada• Wayne Thogmartin, USGS• Kathi Irvine, USGS• John Sauer, USGS• Jonathan Reichard, USFWS
The Need to Monitor
1) Bat Banding Program (BBP) US Biological Survey/USFWS
2) Endangered Species Monitoring
The Need to Monitor
1) Bat Banding Program (BBP) US Biological Survey/USFWS2) Endangered Species Monitoring
3) Estes Park
National Plan Working Groups
Goal 1: Develop and validate rapid-assessment monitoring plans to determine differences in susceptibility among species, and identify which species are most vulnerable to extinction due to WNS.
Loeb & Winters 2013
Humphries et al. 2002
Indiana Bat Summer Distribution Little Brown Bat Winter Distribution
North American Bat Monitoring Program -- NABat
Vision: A coordinated effort that promotes effective decision-making and long-term viability of NA
bats
Mission:Provide architecture for coordinated bat
monitoring to support local, regional and range-wide inferences about trends in bat populations and abundances
North American Bat Monitoring Program -- NABat
Vision: A coordinated effort that promotes effective decision-making and long-term viability of NA
bats
Mission:Provide architecture for coordinated bat
monitoring to support local, regional and range-wide inferences about trends in bat distributions and abundances
NABat
Fundamental Question:How do trends in NA bat distributions & abundances vary over geographic extents and time periods in relation to WNS, wind energy, CC & conservation actions?
Application:Evaluation of extinction risk and
population status at local and regional scales to support conservation planning
NABat
Fundamental Question:How do trends in NA bat distributions & abundances vary over geographic extents and time periods in relation to WNS, wind energy, CC & conservation actions?
Application:Evaluation of extinction risk and
population status at local and regional scales to support conservation planning
Monitoring Methods
• Acoustic Surveys–Mobile Transects– Stationary Points
• Colony Counts–Hibernacula–Maternity Colonies
Sampling Design
• Generalized Randomized Tessellation Stratified (GRTS) Sample
• Spatially balanced approach• Flexible– Grid cells can be dropped for logistical reasons– Grid cells assigned weights or inclusion
probabilities– Can include some samples outside design
Sampling Design
• Any subset of grid cells is also random and balanced
• Can “over-sample” DoD lands
Response Design-Colony Counts
• Short-term approach– Strengthen current monitoring efforts by states– Standardized protocols & co-variates– No attempt to fit into grid
• Long-term approach– Use grid to search for new colonies
Caveats/Concerns
• Acoustic identification– Many models, which is correct?– Metadata– Archive original data– Robustness to false +’s and –’s?
• Unknown hibernacula– Particularly in western NA
• Better/alternate analyses?
Data Management
• Bat Population Data (BPD) Project– USGS, Fort Collins– https://my.usgs.gov/bpd/