Natural and anthropogenic events influence the soundscapes of four bays on Hawaii Island.

Published

Journal Article

The soundscapes of four bays along the Kona Coast of Hawaii Island were monitored between January 2011 and March 2013. Equivalent, unweighted sound pressure levels within standard 1/3rd-octave bands (dB re: 1μPa) were calculated for each recording. Sound levels increased at night and were lowest during the daytime when spinner dolphins use the bays to rest. A tsunami provided an opportunity to monitor the soundscape with little anthropogenic component. We detected a decrease in sound levels and variability in one of the busiest bays. During the daytime in the 3.15kHz 1/3rd octave band, we detected 92 loud outliers from vessels, aquaculture, and military mid-frequency active sonar. During one military mid-frequency active sonar event sound levels reached 45.8dB above median ambient noise levels. The differences found in the bays illustrate the importance of understanding soundscapes to effectively manage noise pollution in marine ecosystems.

Full Text

Duke Authors

Cited Authors

  • Heenehan, HL; Van Parijs, SM; Bejder, L; Tyne, JA; Southall, BL; Southall, H; Johnston, DW

Published Date

  • November 2017

Published In

Volume / Issue

  • 124 / 1

Start / End Page

  • 9 - 20

PubMed ID

  • 28751031

Pubmed Central ID

  • 28751031

Electronic International Standard Serial Number (EISSN)

  • 1879-3363

International Standard Serial Number (ISSN)

  • 0025-326X

Digital Object Identifier (DOI)

  • 10.1016/j.marpolbul.2017.06.065

Language

  • eng