Dear Colleagues,

We are pleased to announce that the fully formatted version of this paper has 
now been published Open Access in Methods in Ecology and Evolution:

Merchant, N.D., Fristrup, K.M., Johnson, M.P., Tyack, P.L., Witt, M.J., 
Blondel, P., Parks, S.E. (2015). Measuring acoustic habitats. Methods in 
Ecology and Evolution. http://dx.doi.org/10.1111/2041-210X.12330

Please note that a file was missing (PAMGuide.fig) from the pre-proof version 
of the Supplementary Material due to a publishing error - this has now been 
fixed in the formatted version.

PAMGuide, the software which accompanies this paper, will be maintained on 
Source Forge: http://sourceforge.net/projects/pamguide/ Any updates or 
additions to the software will be added here, and extensions can be developed 
collaboratively.

With best wishes,

Nathan Merchant



Summary

1.Many organisms depend on sound for communication, predator/prey detection, 
and navigation. The acoustic environment can therefore play an important role 
in ecosystem dynamics and evolution. A growing number of studies are 
documenting acoustic habitats and their influences on animal development, 
behaviour, physiology, and spatial ecology, which has led to increasing demand 
for passive acoustic monitoring (PAM) expertise in the life sciences. However, 
as yet, there has been no synthesis of data processing methods for acoustic 
habitat monitoring, which presents an unnecessary obstacle to would-be PAM 
analysts.

2.Here, we review the signal processing techniques needed to produce calibrated 
measurements of terrestrial and aquatic acoustic habitats. We include a 
supplemental tutorial and template computer codes in MATLAB and R, which give 
detailed guidance on how to produce calibrated spectrograms and statistical 
analyses of sound levels. Key metrics and terminology for the characterisation 
of biotic, abiotic, and anthropogenic sound are covered, and their application 
to relevant monitoring scenarios is illustrated through example datasets. To 
inform study design and hardware selection, we also include an up-to-date 
overview of terrestrial and aquatic PAM instruments.

3.Monitoring of acoustic habitats at large spatiotemporal scales is becoming 
possible through recent advances in PAM technology. This will enhance our 
understanding of the role of sound in the spatial ecology of acoustically 
sensitive species, and inform spatial planning to mitigate the rising influence 
of anthropogenic noise in these ecosystems. As we demonstrate in this work, 
progress in these areas will depend upon the application of consistent and 
appropriate PAM methodologies.



*******
Dr Nathan Merchant
Senior Scientist, Underwater Noise
Centre for Environment, Fisheries and Aquaculture Science (Cefas)
Pakefield Road
Lowestoft
Suffolk NR33 0HT

+44 (0) 1502 527780

nathan.merch...@cefas.co.uk<mailto:nathan.merch...@cefas.co.uk>
www.cefas.defra.gov.uk<http://www.cefas.defra.gov.uk>
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