Salish Sea

Marginal sea in British Columbia and Washington state

Salish Sea

French: Mer des Salish[1]

The Salish Sea, showing the open Pacific Ocean at lower left, and from there, heading inland: the Strait of Juan de Fuca, the narrow Puget Sound at lower right, and the wide Strait of Georgia at upper center. Sediment from the Fraser River shows as a greenish plume in the Strait of Georgia.

Salish Sea

Location| British Columbia and Washington
Coordinates| 48°56′12″N 123°03′40″W﻿ / ﻿48.93667°N 123.06111°W﻿ / 48.93667; -123.06111
River sources| Fraser, Nisqually, Nooksack, Puyallup, Skagit, Snohomish and Squamish Rivers
Ocean/sea sources| Pacific Ocean
Catchment area| 110,000 km2 (42,000 sq mi) [2]
Basin countries| Canada and United States
Surface area| 18,000 km2 (6,900 sq mi) [3]
Average depth| 130 m (430 ft)
Max. depth| 670 m (2,200 ft)[4]
Residence time| 110 days[5][6]
Settlements| Seattle, Vancouver, Surrey, Tacoma, Victoria, Everett, Nanaimo

The Salish Sea (/ˈseɪlɪʃ/ SAY-lish) is a marginal sea of the Pacific Ocean located in the  Canadian province of British Columbia and the U.S. state of  Washington. It includes the Strait of Georgia, the Strait of Juan de Fuca, Puget Sound, and an intricate network of connecting channels and adjoining waterways.

The sea stretches from the channels of the Discovery Islands north of the Strait of Georgia to Budd Inlet at the south end of Puget Sound. It is partially separated from the open Pacific Ocean by Vancouver Island and the Olympic Peninsula.

Much of the coast is part of the Pacific Northwest megalopolis. The region is anchored by Metro Vancouver to the north, and Metro Seattle to the south. Other principal cities on the Salish Sea include  Bellingham, Port Angeles, Port Townsend, Everett, Tacoma, Olympia, and Bremerton in Washington, and Victoria and Nanaimo in British Columbia. As of 2021, the region was home to 8.76 million people.[7]

## Name

[edit]

### Etymology

[edit]

The first known use of the term "Salish Sea" was in 1988 when Bert Webber, a geography and environmental social studies professor emeritus in Huxley College of the Environment at Western Washington University in Bellingham, Washington, created the name for the combined waters in the region with the intention to complement the names Georgia Strait, Puget Sound, and Strait of Juan de Fuca, not replace them.[8] The adoption of the term, he said, would raise consciousness about taking care of the region's waters and ecosystems. Webber's efforts are credited with the official recognition of the term in Canada and the U.S.

### Coast Salish peoples

[edit]

Distribution of Coast Salish languages in the early 19th century

The Coast Salish are the indigenous peoples who live in southwest British Columbia and northwest Washington along the Salish Sea and share a common linguistic and cultural origin. The Coast Salish are seen as one of the main cultural and linguistic branches of a larger group known as Salishan or Salish. Five divisions of the Salish language family are recognized, with Coast Salish and Interior Salish being the primary two. The Salish family consists of 23 separate languages.[9] European and American explorers first encountered Salishan people along the Pacific Northwest coast in the late 18th century. The first detailed information was obtained by the Lewis and Clark Expedition of 1804–1806.[10] The term "Salish" was originally applied only to the Interior Salish Flathead tribe living in the region of Flathead Lake, Montana.[10][11] By the mid-20th century, it had been extended to cover all people speaking a similar language.[12] The Flathead Nation continues to refer to their language and culture as Salish.[13][14] A variant name for Flathead Lake is "Selish Lake".[15] The name Salish Sea was coined only in the late 20th century. No overarching title exists for this area or even a commonly shared name for any of the waterbodies in any of the Coast Salish languages.

The waterways of the Salish Sea were important trade routes for the Coast Salish, and they remain a source of food and other resources for the Indigenous peoples. The basin includes territory of not only Coast Salish peoples, but also the Northern Wakashan Kwakwaka'wakw and Southern Wakashan peoples (the Nuu-chah-nulth, Makah, and Ditidaht) and, formerly, that of the Chimakum (a Chimakuan people related to the Quileute, who no longer exist as a recognizable group, having been wiped out by the Suquamish and others in the 19th century).[16]

### Official recognition

[edit]

In March 2008, the Chemainus First Nation proposed renaming the Georgia Strait the "Salish Sea", an idea that reportedly met with approval by British Columbia's Aboriginal Relations Minister Mike de Jong, who pledged to put it before the Executive Council of British Columbia for discussion. Making the name "Salish Sea" official required a formal application to the Geographical Names Board of Canada.[17] A parallel American movement promoting the name had a different definition, combining the Strait of Juan de Fuca and Puget Sound, as well as the Strait of Georgia and related waters under the name Salish Sea.

In August 2009, the British Columbia Geographical Names Office approved a resolution recommending that the Geographical Names Board of Canada adopt the name Salish Sea contingent on approval by the United States Board on Geographic Names.[18][19] The name was endorsed by the Washington State Board on Geographic Names in late October 2009.[20] It was approved by the United States Board on Geographic Names on November 12, 2009,[21] and by the British Columbia Geographical Names Office in February 2010. The French name Mer des Salish is also official in Canada.[3]

In a 2019 survey of residents in the general vicinity of the Salish Sea, only 9% of Washingtonians and 15% of British Columbians were able to correctly identify and name the Salish Sea.[22]

### Other names

[edit]

The region encompassing these waterways is or was also known variously as the Georgia–Puget or Puget–Georgia Basin, or in the singular as the Georgia Depression, the Georgia Basin or Puget Sound, et al. The Canadian half of the region was named in 1792 by George Vancouver, and often remains referred to as the Gulf of Georgia,[23] a term which encompasses the Strait of Georgia and all other waters peripheral to it, as well as to the communities lining its shores or on its islands. Like the term "Puget Sound", the terms "Georgia Strait" and "Gulf of Georgia" refer to the general region, as well as the body of water.

## Geography

[edit]

Sunlight reflects off the Salish Sea as seen from the International Space Station on April 11, 2020 The Salish Sea with the Olympic Peninsula in the background

The Salish Sea is about 440 km (270 mi) long and has a surface area of about 18,000 km2 (6,900 sq mi), which is roughly the same size as the Gulf of Riga in Northern Europe.[3] This combines the total surface area of the Strait of Georgia (6,400 km2 or 2,471 mi2), Strait of Juan de Fuca (4,400 km2 or 1,699 mi2), Puget Sound (2,500 km2 or 965 mi2), Desolation Sound (1,100 km2 or 425 mi2), and various other bodies of water (3,600 km2 or 1,390 mi2).[2][24] The sea has an average depth of 130 m (430 ft) and reaches a maximum depth of 670 m (2,200 ft) in Jervis Inlet.[4]

### Extent

[edit]

The Transboundary Georgia Basin–Puget Sound Environmental Indicators Working Group defines the limits of the Salish Sea as:[2][3][25]

> On the West. The entrance to Juan de Fuca Strait (a line between Cape Flattery and Carmanah Point).

> On the South. The south end of Puget Sound (the head of Budd Inlet).

> On the North. Extends just beyond the Strait of Georgia to include those channels and waterways where the floodstream or tidal surge is from the south: Discovery Passage south of Seymour Narrows, Sutil Channel south of Penn Islands, Lewis Channel, Waddington Channel and Pendrell Sound, Desolation Sound, and the southern portion of Homfray Channel.

### Hydrology

[edit]

The watershed of the Salish Sea (not including the Upper Fraser River watershed) has a total area of about 110,000 km2 (42,000 sq mi), which is over six times the surface area of the sea itself.[2] Major rivers discharging into the sea include the Fraser River, Nisqually River, Nooksack River, Puyallup River, Skagit River, Snohomish River, and Squamish River.

The flow of fresh water into the Salish Sea from numerous rivers and the introduction of salt from the Strait of Juan de Fuca create a salinity gradient, which varies considerably depending on seasonal changes in ocean currents and river discharge.[26] The Fraser River is the single largest source of freshwater with an average discharge rate of 3,475 m3/s (122,700 cu ft/s) and a maximum discharge rate of 17,000 m3/s (600,000 cu ft/s).[27]

Residence times at intermediate depths average 60 days in Puget Sound and 160 days in the Strait of Georgia.[5][28]

### Islands

[edit]

Forested islets and skerries of the Southern Gulf Islands

The Salish Sea contains more than 400 islands, most of which can be grouped into one of three island groups: the Discovery Islands, Gulf Islands, and San Juan Islands.

Whidbey Island in Washington is the largest and most populous island with a total area of 436.9 km2 (168.7 sq mi) and an estimated population of 69,480 as of 2010.[29][30] Bainbridge Island, also in Washington, is the most densely populated island with 354 residents/km2 (916 residents/mi2) as of 2019.[31] The largest island by far on the Canadian side is Texada Island of 300.45 km2 (116.00 sq mi), but a population of 1000–2000 people.

## Geology

[edit]

Main article: Georgia Depression

The Salish Sea sits within the Georgia Depression, a large depression that formed out of the collision of continental plates about 150 million years ago. The depression was then carved by the advance and retreat of the Cordilleran Ice Sheet during the Vashon Glaciation, which lasted from about 19,000 – 16,000 BP. The retreat of the ice sheet revealed a scarred landscape that filled in with sea water once it had retreated beyond what is now the Strait of Juan de Fuca.[2][32][33]

## Ecology

[edit]

### Marine

[edit]

The Salish Sea supports an active and dynamic marine ecosystem, dominated by species suited to the brackish, nutrient-rich, conditions. As with all marine food webs, the Salish Sea features a range of trophic groups, with autotrophic algae acting as primary producers. The fluvial systems draining British Columbia and Washington introduce large volumes of sediment and dissolved nutrients into the Salish Sea.

#### Flora

[edit]

Bull kelp washed ashore near Victoria

The Salish Sea hosts a diverse community of kelp species that provide large volumes of high-quality habitat in areas with hard, rocky substrates. The largest of these kelp species include bull kelp and giant kelp.[34]

Eelgrass meadows are abundant throughout the shallower regions of the sea.[34]

#### Fauna

[edit]

Main article: Marine mammals of the Salish Sea

An orca breaching in Hood Canal

The Salish Sea is home to 253 fish species representing 78 families and 31 orders. These species encompass one myxinid, two petromyzontids, 18 chondrichthyans, two chondrosteans, and 230 teleosts.[35]

In addition, the sea hosts 37 marine mammal species, most notably Steller sea lions, humpback whales, and killer whales (orcas). While mammal-eating transient orcas are gradually increasing in population, fish-eating southern resident orcas have struggled to survive due to low salmon populations and inbreeding.[36] In 2019, this orca population was at a 35-year low after three adult deaths and no surviving calves over three years, leaving only 73 whales in the community.[37][38][39] In 2021, an upsurge may occur in the humpback whale population with a record 21 humpback calves spotted in Salish waters.[40]

Sea otters have been increasingly observed within the Strait of Juan de Fuca.[41]

#### Sponge reefs

[edit]

The mineral-rich waters of the Salish Sea are an ideal habitat for the formation of glass sponge reefs. These reefs were believed to have gone extinct during or shortly after the Cretaceous period, until a large collection of existing reefs were discovered off the British Columbia Coast in 1987.[42] Due to their scientific and ecological importance, all known sponge reefs in the Salish Sea are protected from bottom-contact fishing activities.[43]

### Terrestrial

[edit]

The lowlands surrounding the Salish Sea are part of the WWF-designated Puget lowland forests and Central Pacific coastal forests ecoregions.

Of the 172 bird species found in the area, 72 are highly dependent on the marine ecosystem for their food.[44]

## Foot discoveries

[edit]

Main article: Salish Sea human foot discoveries

Since August 20, 2007, at least 20 detached human feet have been found on the coasts of the Salish Sea.[45][better source needed] The first discovery, on August 20, 2007, was on Jedediah Island in British Columbia.[46]

## See also

[edit]

* Pacific Northwest portal

## References

[edit]

1. ^ Government of Canada, Natural Resources Canada. "Place names – Mer des Salish". www4.nrcan.gc.ca. Retrieved November 18, 2021.
2. ^ a b c d e Environmental History and Features of Puget Sound Archived May 13, 2009, at the Wayback Machine, NOAA-NWFSC
3. ^ a b c d "BC Geographical Names – Salish Sea". apps.gov.bc.ca. Retrieved September 29, 2020.
4. ^ a b Government of Canada, Fisheries and Oceans (January 29, 2009). "Fisheries and Oceans Canada |Pacific Region | Jervis Inlet". www.pac.dfo-mpo.gc.ca. Retrieved October 3, 2020.
5. ^ a b "Puget Sound's physical environment | Encyclopedia of Puget Sound". www.eopugetsound.org. Retrieved October 1, 2020.
6. ^ Pawlowicz, Rich; Riche, Olivier; Halverson, Mark (2007). "The circulation and residence time of the strait of Georgia using a simple mixing-box approach". Atmosphere-Ocean. 45 (4): 173–193\. Bibcode:2007AtO....45..173P. doi:10.3137/ao.450401. ISSN 0705-5900. S2CID 129018974.
7. ^ Canada, Environment and Climate Change (February 12, 2021). "Importance Salish Sea". www.canada.ca. Retrieved July 30, 2023.
8. ^ Stefan Freelan (Washington State University) 2009: "The Salish Sea (& surrounding basin"): "Rather than being a replacement for any of the existing names, the designation 'Salish Sea' is an overlay, which includes and unites the established and familiar names of the various water and land bodies".
9. ^ Czykowsky-Higgins, Ewa; Marvin Dale Kinkade (1998). Salish languages and linguistics: theoretical and descriptive perspectives. Walter de Gruyter. pp. 1–4, 59. ISBN 978-3-11-015492-4.
10. ^ a b Hodge, Frederick Webb (1910). Handbook of American Indians north of Mexico, Volume 2. United States Government Printing Office. pp. 415–417. OCLC 1297754.
11. ^ Oxford English Dictionary. Salish. Second Edition 1989 (online). Retrieved November 23, 2009.
12. ^ "Salish". Encyclopædia Britannica, Inc. Retrieved November 23, 2009.
13. ^ "Tribal Preservation Department". Confederated Salish & Kootenai Tribes. Archived from the original on March 15, 2012. Retrieved November 23, 2009.
14. ^ "Salish Culture Committee". Confederated Salish & Kootenai Tribes. Archived from the original on April 21, 2012. Retrieved November 23, 2009.
15. ^ "Flathead Lake". Geographic Names Information System. United States Geological Survey, United States Department of the Interior.
16. ^ Curtis, Edward S. The North American Indian. Volume 9 – The Salishan tribes of the coast. The Chimakum and the Quilliute. The Willapa. Classic Books Company. pp. 141–142\. ISBN 978-0-7426-9809-3.
17. ^ "Strait of Georgia could be renamed Salish Sea". Canadian Press. CBC.ca. March 9, 2008. Retrieved March 10, 2008.
18. ^ "Washington state adopts "Salish Sea" name for body of water including Strait of Georgia". The Georgia Straight. October 30, 2009.
19. ^ Berger, Knute (October 20, 2009). "Smooth Sailing for the Salish Sea?". Crosscut Blog. Archived from the original on January 5, 2010. Retrieved June 1, 2020.
20. ^ "State Board on Geographic Names Approves 'salish Sea'". October 30, 2009. Archived from the original on October 30, 2013.
21. ^ Berger, Knute (November 12, 2009). "U.S. approves Salish Sea name". Crosscut.com. Archived from the original on February 27, 2010. Retrieved August 13, 2011.
22. ^ Trimbach, David; Gaydos, Joe (May 20, 2019). "Survey illustrates a lack of familiarity with the Salish Sea". Puget Sound Institute. Retrieved May 21, 2019.
23. ^ Roberts, John E. (2005). A Discovery Journal: George Vancouver's First Survey Season – 1792. Trafford Publishing. p. 72\. ISBN 978-1-4120-7097-3.
24. ^ "Map of the Salish Sea & Surrounding Basin – Maps by Stefan Freelan". Retrieved October 9, 2020.
25. ^ "GNIS Detail – Salish Sea". geonames.usgs.gov. Retrieved September 29, 2020.
26. ^ "A year of LiveOcean salinity fields". faculty.washington.edu. Retrieved October 3, 2020.
27. ^ Cannings, Richard and Sidney. British Columbia: A Natural History. p. 41\. Greystone Books. Vancouver. 1996
28. ^ Pawlowicz, Rich; Riche, Olivier; Halverson, Mark (2007). "The circulation and residence time of the strait of Georgia using a simple mixing-box approach". Atmosphere-Ocean. 45 (4): 173–193\. Bibcode:2007AtO....45..173P. doi:10.3137/ao.450401. ISSN 0705-5900. S2CID 129018974.
29. ^ "Search Results". The United States Census Bureau. Retrieved September 29, 2020.
30. ^ "Community Facts: Camano CDP, Washington". United States Census Bureau. Retrieved September 26, 2019.[permanent dead link]
31. ^ "Annual Estimates of the Resident Population for Incorporated Places in Washington: April 1, 2010 to July 1, 2019". United States Census Bureau. May 2020. Retrieved May 27, 2020.
32. ^ "About the Strait • Georgia Strait Alliance". Georgia Strait Alliance. Retrieved October 9, 2020.
33. ^ Parks Canada Agency, Government of Canada (March 22, 2018). "Environment – Gulf Islands National Park Reserve". www.pc.gc.ca. Retrieved August 24, 2020.
34. ^ a b "Puget Sound Kelp Conservation and Recovery Plan May 2020" (PDF). Northwest Straits Commission. May 1, 2020. Archived (PDF) from the original on September 24, 2020. Retrieved September 26, 2020.
35. ^ Pietsch, Theodore W.; Orr, James W. (September 2015). NOAA Professional Paper NMFS 18-Fishes of the Salish Sea: a compilation and distributional analysis (PDF) (Report). National Marine Fisheries Service. p. 1\. Archived from the original (PDF) on June 14, 2017. Retrieved November 15, 2015.
36. ^ Kardos, Marty; Zhang, Yaolei; Parsons, Kim M.; A, Yunga; Kang, Hui; Xu, Xun; Liu, Xin; Matkin, Craig O.; Zhang, Peijun; Ward, Eric J.; Hanson, M. Bradley; Emmons, Candice; Ford, Michael J.; Fan, Guangyi; Li, Songhai (2023). "Inbreeding depression explains killer whale population dynamics" (PDF). Nature Ecology & Evolution. 7 (5): 675–686\. Bibcode:2023NatEE...7..675K. doi:10.1038/s41559-023-01995-0. ISSN 2397-334X.
37. ^ Wasser, Samuel K.; Lundin, Jessica I.; Ayres, Katherine; Seely, Elizabeth; Giles, Deborah; Balcomb, Kenneth; Hempelmann, Jennifer; Parsons, Kim; Booth, Rebecca (2017). "Population growth is limited by nutritional impacts on pregnancy success in endangered Southern Resident killer whales (Orcinus orca)". PLOS ONE. 12 (6): e0179824. Bibcode:2017PLoSO..1279824W. doi:10.1371/journal.pone.0179824. PMC 5491047. PMID 28662095.
38. ^ Lynda V. Mapes (January 3, 2019). "2 more Puget Sound orcas predicted to die in critically endangered population". Seattle Times. Retrieved January 5, 2019.
39. ^ Robinson, M. (August 7, 2019). "Deaths of southern resident killer whales raise fears for population". Vancouver Sun. Retrieved August 9, 2019.
40. ^ "Record number of humpback calves spotted in Salish Sea and 'surprised' researchers wonder why | Globalnews.ca". Global News. Retrieved October 23, 2021.
41. ^ Ollikainen, Rob (July 22, 2018). "Sea otter sightings swell in Strait of Juan de Fuca". Peninsula Daily News. Retrieved September 28, 2020.
42. ^ Government of Canada, Fisheries and Oceans Canada (September 18, 2019). "Hecate Strait/Queen Charlotte Sound Glass Sponge Reefs Marine Protected Area (HS/QCS MPA)". www.dfo-mpo.gc.ca. Retrieved September 26, 2020.
43. ^ Government of Canada, Fisheries and Oceans Canada (August 30, 2019). "Strait of Georgia and Howe Sound Glass Sponge Reef (17 fisheries area closures)". www.dfo-mpo.gc.ca. Retrieved September 27, 2020.
44. ^ Gaydos, Joseph (2011). "Birds and Mammals that Depend on the Salish Sea: A Compilation" (PDF). Northwestern Naturalist. 92 (2): 79–94\. doi:10.1898/10-04.1. S2CID 84847690.
45. ^ Fraga, Kaleena (May 20, 2023). "The Eerie Mystery Behind The 21 Severed Feet That Have Washed Ashore In The Pacific". All That's Interesting. Retrieved March 4, 2024.
46. ^ "Discovery of unattached human feet baffles B.C. police". CBC News. August 31, 2007. Retrieved June 18, 2008.

## Further reading

[edit]

* Tucker, Brian; Rose-Redwood, Reuben (2015). "Decolonizing the map? Toponymic politics and the rescaling of the Salish Sea". Canadian Geographies. 59 (2): 194–206\. Bibcode:2015CGeog..59..194T. doi:10.1111/cag.12140.

## External links

[edit]

Wikimedia Commons has media related to Salish Sea.

* Map outlining the boundaries of the Salish Sea and its surrounding topography

Gaydos, Joseph K.; Dierauf, Leslie; Kirby, Grant; Brosnan, Deborah; Gilardi, Kirsten; Davis, Gary E. (December 2008). "Top 10 Principles for Designing Healthy Coastal Ecosystems Like the Salish Sea" (PDF). EcoHealth. 5 (4): 460–471\. doi:10.1007/s10393-009-0209-1. PMID 19259736. S2CID 11325705. Retrieved November 3, 2022.

* ARCGIS Salish Sea & Surrounding Basin map
* Kwiáht Center for the Historical Ecology of the Salish Sea
* Where is the Salish Sea? at Salish Sea Atlas, Western Washington University
* 2 Hours Of High Quality Underwater Footage From The Salish Sea Showing The Marine Life and Underwater Scenery.

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