Identifying Modeled Ship Noise Hotspots for Marine Mammals of Canada’s Pacific Region
MetadataShow full item record
This article is published under the Open Access publishing model and distributed under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/ Please refer to the licence to obtain terms for any further reuse or distribution of this work.
The inshore, continental shelf waters of British Columbia (BC), Canada are busy with ship traffic. South coast waters are heavily trafficked by ships using the ports of Vancouver and Seattle. North coast waters are less busy, but expected to get busier based on proposals for container port and liquefied natural gas development and expansion. Abundance estimates and density surface maps are available for 10 commonly seen marine mammals, including northern resident killer whales, fin whales, humpback whales, and other species with at-risk status under Canadian legislation. Ship noise is the dominant anthropogenic contributor to the marine soundscape of BC, and it is chronic. Underwater noise is now being considered in habitat quality assessments in some countries and in marine spatial planning. We modeled the propagation of underwater noise from ships and weighted the received levels by species-specific audiograms. We overlaid the audiogram-weighted maps of ship audibility with animal density maps. The result is a series of so-called “hotspot” maps of ship noise for all 10 marine mammal species, based on cumulative ship noise energy and average distribution in the boreal summer. South coast waters (Juan de Fuca and Haro Straits) are hotspots for all species that use the area, irrespective of their hearing sensitivity, simply due to ubiquitous ship traffic. Secondary hotspots were found on the central and north coasts (Johnstone Strait and the region around Prince Rupert). These maps can identify where anthropogenic noise is predicted to have above-average impact on species-specific habitat, and where mitigation measures may be most effective. This approach can guide effective mitigation without requiring fleet-wide modification in sites where no animals are present or where the area is used by species that are relatively insensitive to ship noise
Showing items related by title, author, creator and subject.
Fewtrell, Jane Leah (2003)The oil and gas industry is of major economic importance to Australia. Offshore seismic surveys are an essential component of exploration for fossil fuel reserves. Offshore seismic surveys involve the use of arrays of ...
Potential climate-mediated changes to the distribution and density of pomacentrid reef fishes in south-Western AustraliaShalders, T.; Saunders, Ben; Bennett, Scott; Parker, J.; Harvey, Euan (2018)© The authors 2018. Climate change and associated increased water temperatures pose a substantial threat for the future of marine ecosystems. Temperate Australia is a global biodiversity hotspot which has experienced ocean ...
Managing the Effects of Noise From Ship Traffic, Seismic Surveying and Construction on Marine Mammals in AntarcticaErbe, Christine ; Dähne, M.; Gordon, J.; Herata, H.; Houser, D.S.; Koschinski, S.; Leaper, R.; McCauley, Robert ; Miller, B.; Müller, M.; Murray, A.; Oswald, J.N.; Scholik-Schlomer, A.R.; Schuster, M.; Van Opzeeland, I.C.; Janik, V.M. (2019)© 2019 Erbe, Dähne, Gordon, Herata, Houser, Koschinski, Leaper, McCauley, Miller, Müller, Murray, Oswald, Scholik-Schlomer, Schuster, Van Opzeeland and Janik. The Protocol on Environmental Protection of the Antarctic ...