Localised coastal habitats have distinct underwater sound signatures

Radford, Craig A.; Stanley, Jenni A.; Tindle, CT; Montgomery, John C.; Jeffs, Andrew G.

doi:10.3354/meps08451

Cited by 180 publications

(158 citation statements)

References 48 publications

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“…The frequency band associated with urchin feeding (800 to 2500 Hz) had much greater sound intensity at the urchin-dominated habitat compared to other habitats, and the greatest differences among habitats were found at dusk (Radford et al, 2010). Similar among-site variability has been identified on coral reefs .…”

Section: Introductionsupporting

confidence: 52%

“…Spatially, Radford et al (2010) found spectral and temporal differences between nearby sandy, macroalgal-and urchin-dominated habitats. The frequency band associated with urchin feeding (800 to 2500 Hz) had much greater sound intensity at the urchin-dominated habitat compared to other habitats, and the greatest differences among habitats were found at dusk (Radford et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…However, sound levels in the marine environment also vary considerably in space. Radford et al (2010) identified spectral and temporal differences between nearby sandy, macroalgal-and urchin-dominated habitats. Similarly, acoustic differences have been found between and among nearby coral reefs Staaterman et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Coral reef soundscapes : spatiotemporal variability and links to species assemblages

Kaplan¹

2017

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Coral reefs are biodiverse ecosystems that are at risk of degradation as a result of environmental changes. Reefs are constantly in a state of flux: the resident species assemblages vary considerably in space and time. However, the drivers of this variability are poorly understood. Tracking these changes and studying how coral reefs respond to natural and anthropogenic disturbance can be challenging and costly, particularly for reefs that are located in remote areas. Because many reef animals produce and use sound, recording the ambient soundscape of a reef might be one way to efficiently study these habitats from afar. In this thesis, I develop and apply a suite of acoustics-based tools to characterize the biological and anthropogenic acoustic activity that largely comprises marine soundscapes. First, I investigate links between reef fauna and reef-specific acoustic signatures on coral reefs located in the U.S. Virgin Islands. Second, I compare those findings to a more expansive study that I conducted in Maui, Hawaii, in which the drivers of bioacoustic differences among reefs are explored. Third, I investigate the distances over which sounds of biological origin may travel away from the reef and consider the range within which these acoustic cues might be usable by pelagic larvae in search of a suitable adult habitat. Fourth, I assess the extent to which the presence of vessel noise in shallow-water habitats changes the ambient soundscape. Finally, I present the results of a modeling exercise that questions how ocean noise levels might change over the next two decades as a result of major projected increases in the number and size of and distance traveled by commercial ships. The acoustics-based tools presented here help provide insight into ecosystem function and the extent of human activity in a given habitat. Additionally, these tools can be used to inform an effective regulatory regime to improve coral reef ecosystem management.

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Section: Introductionsupporting

confidence: 52%

Section: Introductionmentioning

confidence: 99%

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Coral reef soundscapes : spatiotemporal variability and links to species assemblages

Kaplan¹

2017

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“…Further experiments revealed that the endoparasitic larva of the pilumnid crab Echinoecus pentagonus (A. Milne Edwards, 1879) use both visual and chemical cues to locate echinoid hosts (Castro, 1978). Acoustic sounds generated by foraging echinoids may also help guide decapods to echinoids (Radford et al, 2008(Radford et al, , 2010.…”

Section: Crustacean Research 45mentioning

confidence: 99%

Decapod crustaceans associating with echinoids in Roatán, Honduras

et al. 2016

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Abstract. Echinoids comprise an integral component of coral reef ecosystems, providing trophic links, microhabitats, and refuge for a wide diversity of symbiotic organisms. We studied the association of at least eight species of decapod crustacean ectosymbionts with six species of echinoids at Roatán, Honduras, during 6-11 September 2015. Decapods associated most frequently with the echinoid Diadema antillarum (10.80% of individuals of this echinoid, six decapod species; n 799), followed by Eucidaris tribuloides (1.74%, three species; n 746), Echinometra lucunter (1.30%, six species; n 8349), Tripneustes ventricosus (0.86%, four species; n 1167), Echinometra viridis (0.23%, two species; n 862), and Lytechinus variegatus (0%, no species; n 12). Of 239 individual decapods observed, Percnon gibbesi was the most common species (48.5% of decapods, four echinoid species), followed by unidentified hermit crabs (Paguridae; 27.2%, five species), Stenorhynchus seticornis (11.7%, three species), Stenopus hispidus (6.3%, three species), Plagusia depressa (3.3%, three species), Panulirus argus (1.3%, one species), an unidentified small crab (possibly Pitho sp.; 1.3%, one species), and Mithrax verrucosus (0.4%, one species). The frequency of association varied with water depth for P. gibbesi, which associated more frequently with D. antillarum in shallow water ( 5 m), and S. seticornis, which associated more frequently with D. antillarum in deep water ( 5 m). None of the decapod species associated exclusively with echinoids or was specialized for associating with echinoids. Decapods associated with the longest-spined species, D. antillarum, at a rate more than six times higher than that of any other echinoid species, supporting the hypothesis that decapods seek shelter among the spines of echinoids to benefit from decreased predation.

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“…These include, but are not limited to, chemical cues, polarised light, hydrodynamic cues, and magnetic and electrical fields (Montgomery et al 2006). However, it is sound that has been highlighted as having the strongest potential as a long distance orientation cue (Simpson et al 2004, Montgomery et al 2006, due in part to underwater sound being fast and far reaching, suffering little attenuation (Rodgers & Cox 1988), and having the ability to convey habitat information in a directional manner (Radford et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Chronic low-intensity noise exposure affects the hearing thresholds of juvenile snapper

Caiger¹,

Montgomery²,

Radford³

2012

Mar. Ecol. Prog. Ser.

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A growing body of evidence suggests that larval fish use sound as an orientation cue to remotely locate suitable settlement habitats. Several theoretical models have used hearing thresholds to estimate the distance at which fish larvae can detect reefs. However, researchers have often measured hearing thresholds from fish raised in aquaculture environments, or held them in closed-system tanks once caught, where equipment can significantly increase the noise levels in the tanks. The possibility arises that exposure to such noise negatively affects the hearing ability of the fish held there, such that distances predicted from these studies may be underestimated. The objective of this study was to compare the hearing ability of wild versus aquacultured snapper Pagrus auratus using auditory evoked potentials. Juvenile snapper from aquaculture tanks had significantly higher hearing thresholds at 100, 200 and 400 Hz than wild snapper. A controlled noise-exposure experiment, where snapper were ex posed for 2 wk to low-intensity noise at 120 dB re 1 µPa, confirmed these results. When plotted using an extended reef-based model, the distance at which aquaculture-raised snapper are predicted to detect a particular reef was half of that found for their wild counterparts. Clearly, the acoustic history of experimental subjects is an important consideration when using hearing thresholds to make ecological estimations, such as the distance at which larvae could detect reefs.

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Localised coastal habitats have distinct underwater sound signatures

Cited by 180 publications

References 48 publications

Coral reef soundscapes : spatiotemporal variability and links to species assemblages

Coral reef soundscapes : spatiotemporal variability and links to species assemblages

Decapod crustaceans associating with echinoids in Roatán, Honduras

Chronic low-intensity noise exposure affects the hearing thresholds of juvenile snapper

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