MEPS 516:35-47 (2014)  -  DOI:

Habitat quality affects sound production and likely distance of detection on coral reefs

Julius J. B. Piercy1,*, Edward A. Codling1,2, Adam J. Hill3, David J. Smith1, Stephen D. Simpson

1School of Biological Sciences, University of Essex, Colchester CO4 3SQ, UK
2Department of Mathematical Sciences, University of Essex, Colchester CO4 3SQ, UK
3Department of Engineering, University of Derby, Derby DE22 1GB, UK
4Biosciences, College of Life and Environmental Sciences, University of Exeter, Exeter EX4 4QD, UK
*Corresponding author:

ABSTRACT: The interwoven nature of habitats and their acoustic fingerprints (soundscapes) is being increasingly recognized as a key component of animal ecology. Natural soundscapes are crucial for orientation in many different taxa when seeking suitable breeding grounds or settlement habitats. In the marine environment, coral reef noise is an important navigation cue for settling reef fish larvae and is thus a possible driver of reef population dynamics. We explored reef noise across a gradient of reef qualities, tested sound propagation models against field recordings and combined them with fish audiograms to demonstrate the importance of reef quality in determining which reefs larvae are likely to detect. We found that higher-quality reefs were significantly louder and richer in acoustic events (transient content) than degraded reefs, and observed that sound propagated farther with less attenuation than predicted by classic models. We discuss how zones of detection of poor-quality reefs could be reduced by over an order of magnitude compared to healthy reefs. The present study provides new perspectives on the far reaching effects habitat degradation may have on organisms that utilize soundscapes for orientation towards or away from coral reefs, and highlights the value of sound recordings as a cost-effective reef survey and monitoring tool.

KEY WORDS: Underwater soundscape · Anthropogenic impact · Larval fish · Coral reef · Settlement habitat · Passive acoustic monitoring

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Cite this article as: Piercy JJB, Codling EA, Hill AJ, Smith DJ, Simpson SD (2014) Habitat quality affects sound production and likely distance of detection on coral reefs. Mar Ecol Prog Ser 516:35-47.

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