recording by recording: citynet and the british bat survey ......local-scale species monitoring...
TRANSCRIPT
Recording by recording: CityNet
and the British Bat Survey (and
Nature-Smart Cities)
Dr Alison Fairbrass
[email protected] @AlisonFairbrass
National Forum for Biological Recording Conference, 10th May 2019
Acoustic indicator of
biodiversity for urban
environments
Local-scale species
monitoring
National -scale species
monitoring
Acoustic indicator of
biodiversity for urban
environments
Local-scale species
monitoring
National -scale species
monitoring
CityNet
Produces patterns
of biotic and
anthropogenic
acoustic activity
over long temporal
scales
Fairbrass et al. (2019) Methods Ecol. Evol.
Anthropogenic
Biotic
Acoustic Indices –Ecoacoustic Algorithms to Measure Biodiversity Sound?
BI = signal power within 2-8Khz frequency bin
BIOACOUSTIC INDEX Boelman et al. (2007) Ecol. Appl.
2kHz
ACOUSTIC COMPLEXITY INDEXPieretti et al. (2011) Ecol. Indic.
Simple algorithms that measure
the biotic sound in large
volumes of audio data.
CitySounds2017
Library of urban sounds
Fairbrass et al. (2017) Ecol. Indic.
Biotic sound ……………100%
Anthropogenic sound…..5%
Results
CNN
Deep Learning
CityNet
Machine learning algorithms to measure biotic and anthropogenic sound in large
volumes of noisy audio data from the urban environment.
Fairbrass et al. (2019) Methods Ecol. Evol.
Acoustic indicator of
biodiversity for urban
environments
Local-scale species
monitoring
National -scale species
monitoring
www.naturesmartcities.com
Soprano Pipistrelle Leisler
Common pipistrelle
(Pipistrellus
pipistrellus)
Daubenton’s bat
(Myotis
daubentonii)
Mac Aodha et al. (2018) PLoS Computational Biology
Soprano pipistrelle…10%
Leisleri..……………60%
Noctula….………....30%
Results
CNN
Deep Learning
Mac Aodha et al. (in prep.)
# bat calls per night
July Aug Sept
Water TreesGrassPark
# bat calls per night
July Aug Sept
1 2 5 10 12
# log mean bat calls / night / sensor
13 6 7 8 9 11 14
Water TreesGrassPark
From July 309,057 bat calls from 12
sensors (n = 61 days), mean calls per
night = 5067
Acoustic indicator of
biodiversity for urban
environments
Local-scale species
monitoring
National-scale species
monitoring
What is the British Bat Survey (BBatS)
Incorporating new technology for monitoring bats into the
National Bat Monitoring Programme (NBMP) to help meet
some NBMP strategic targets including:
● Increased participation and engagement with the NBMP
● Greater geographic coverage and monitoring of currently
under-surveyed habitats
+
Bat call detection and
classification algorithmsAudioMoth
Soprano pipistrelle…..……10%
Leisleri..…………………….60%
Noctula.…………………….30%
Results
CNN
Deep Learning
Fairbrass et al. (2019) A Plan for the British Bat Survey. BCT
BBatS Protocol
Fairbrass et al. (2019) A Plan for the British Bat Survey. BCT
BBatS Protocol
Recording bats using the AudioMoth
Hill et al. (2018) Methods Ecol. Evol.
Testing the AudioMoth
Collen (2012) UCL PhD Thesis; Browning et al. (in prep.)
BBatS Protocol
Fairbrass et al. (2019) A Plan for the British Bat Survey. BCT
BCT Amazon Web
Service
Volunteers
computer
N.leisleri..………………..…90%
N.noctula.………………..….9%
P.pygmaeus …………….…1%
Results
Deep learning
network
Machine learning algorithms to detect and identify
bat calls
Mac Aodha et al. (2018) PLoS Computational Biology
BBatS Protocol
Fairbrass et al. (2019) A Plan for the British Bat Survey. BCT
Results reportingResults
Email to volunteer with
site level resultsPublic webpage with
results at 1 km resolution
Estimate national bat
population trends
N.leisleri..………………..…90%
N.noctula.………………..….9%
P.pygmaeus …………….…1%
Acoustic indicator of
biodiversity for urban
environments
Local-scale species
monitoring
National-scale species
monitoring
For more information:
Dr Alison Fairbrass
[email protected] @AlisonFairbrass
National Forum for Biological Recording Conference, 10th May 2019