Transcript North American Bat Monitoring Program (NABat)

North American Bat Monitoring
Program (NABat)
Purpose
• Create a continental-wide program to
monitor bats at local to range-wide scales
• Provide data to promote effective
conservation decision-making and long-term
viability of bat populations across the
continent.
Goals
• Develop and maintain a long-term
continental program to monitor bat
distributions and indices of abundance at
range-wide, regional, and local scales.
Goals
• Provide regular analyses and reporting on the
status and trends of bat populations to
inform managers and policy makers so that
they can manage bat populations effectively.
Some Important Points
• Best for larger scale analyses
• But, can be scaled down
• Long-term nature
– On the order of decades
National State, Federal, Tribal
Response Plan
Conservation and Recovery
Workgroup
The Process
• Collaborative
• International
• Series of 4 workshop
Targeted Species
• 47 Species
– Common to US, Canada, Mexico
Monitoring Methods
• Acoustic Surveys
– Mobile Transects
– Stationary Points
• Colony Counts
– Hibernacula
– Maternity Colonies
Sampling Design – 10 x 10 km grid
Sampling Design- 10 x 10 km grid
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” selected properties
– FS
– DoD
– NPS
– Refuge
A Few Examples…
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956
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1004
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1468
1660
1724
1772
1836
1852
1916
2012
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2492
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108
428
636
812
828
956
1003
1004
1132
1468
1660
1724
1772
1836
1852
1916
2012
2028
2156
2428
2492
2524
2684
2732
2795
2796
2860
2876
3052
3244
3372
3452
3500
3516
3548
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108
428
636
812
828
956
1003
1004
1132
1468
1660
1724
1772
1836
1852
1916
2012
2028
2156
2428
2492
2524
2684
2732
2795
2796
2860
2876
3052
3244
3372
3452
3500
3516
3548
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35
108
428
636
812
828
956
1003
1004
1132
1468
1660
1724
1772
1836
1852
1916
2012
2028
2156
2428
2492
2524
2684
2732
2795
2796
2860
2876
3052
3244
3372
3452
3500
3516
3548
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30
31
32
33
34
35
108
428
636
812
828
956
1003
1004
1132
1468
1660
1724
1772
1836
1852
1916
2012
2028
2156
2428
2492
2524
2684
2732
2795
2796
2860
2876
3052
3244
3372
3452
3500
3516
3548
“Over Sampling” a Property
DoD Cells
Colony Surveys
• Hibernacula surveys
– Continue current surveys
– 2 Independent surveys
– Use NABat protocols
• Data collection
• Data submission
– No need to follow GRTS draw
• Searching for new colonies
– GRTS order may be useful
Stationary Point Acoustic Sampling
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2-4 stationary points
4 nights
Preferably 1 point/5 x 5 km quadrant
Any type of detector except timeexpansion or heterodyne
Selection of Stationary Point Sites
Mobile Transect
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25-48 km (15-30 mi) long
Secondary roads
Safe to drive @ 20 mph
Assume 1 pass = 1 bat
– No or minimal stops
– Don’t want to back track on route
• Variety of habitats
• Need to record associated lat/longs
Species Assignments - Acoustics
• Potentially biggest bottleneck
• Requires knowledge & expertise
• Investment of time and personnel
Species Assignments - Acoustics
• > 2 ID methods
– Auto-ID programs
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BCID
DFA model (Britzke et al. 2011)
Echoclass
Kaleidoscope
Sonobat
– Filters (e.g., AnalookW)
– Qualitative ID
Species Assignments - Acoustics
Frequency (kHz)
• Lowest taxon possible
• Species groups when necessary
• Some visual verification needed
Time
Data Submission
• Bat Population Database
– https://my.usgs.gov/bpd/
Data Submission
• Data partnerships
– Allow NABat access
– Control other access
Data Sheets
• Ensure all necessary data collected
– Acoustic
– Colony counts
• Will develop apps for tablets and
smartphones
Mobile Transect Acoustic Monitoring Datasheet
Surveyor _________________ Grid Cell # _______________
Country ___________ State/Province ____________ County (if applicable) _______________
Stationary Point Sampling Conducted (Y/N) ____________________
Date ____________
Transect Start Latitude/Longitude ________________
Transect End Latitude/Longitude ________________
Sunset Time ____________
Moon phase ______________
Time moon became visible ___________
Cloud cover ______________
Start temperature __________
End temperature ___________
Start RH ____________
End RH _____________
Start Wind Speed _____________
End Wind Speed ______________
Detector Manufacturer and Model _________________________
Microphone type _____________________
Microphone placement ____________________
Recording mode ________________________
Trigger window length _____________________
File length ______________________
Digipot sensitivity from Anabat Equalizer ______________________
Gain settings (SM2BAT+) ___________________
Habitats crossed by transect or general habitat description
____________________________________________
Additional comments about transect or conditions
_______________________________________________________________________________________
_______________________________________________________________________________________
_________________________________________________________________________________
Acoustic Data Uploaders
• Will accept spreadsheets generated by
– Echoclass
– Kaleidoscope
– BCID
– Sonobat
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?
Analysis & Products
• General Technical Report
– Draft available now
– Final on web -- May
• Analyses
– State, regional, and rangewide
analysis
– Distribution & abundance
• State of North American Bats
Report
Further Info
• Laura Ellison
– [email protected]
• Susan Loeb
– [email protected]
Questions?