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<< Other Photo Pages >> Ancient clam gardens on Quadra Island - Ancient Mine, Quarry or other Industry in Canada

Submitted by Andy B on Sunday, 01 February 2015  Page Views: 4126

Multi-periodSite Name: Ancient clam gardens on Quadra Island
Country: Canada Type: Ancient Mine, Quarry or other Industry

Latitude: 50.263250N  Longitude: 125.23803W
Condition:
5Perfect
4Almost Perfect
3Reasonable but with some damage
2Ruined but still recognisable as an ancient site
1Pretty much destroyed, possibly visible as crop marks
0No data.
-1Completely destroyed
4 Ambience:
5Superb
4Good
3Ordinary
2Not Good
1Awful
0No data.
5 Access:
5Can be driven to, probably with disabled access
4Short walk on a footpath
3Requiring a bit more of a walk
2A long walk
1In the middle of nowhere, a nightmare to find
0No data.
1 Accuracy:
5co-ordinates taken by GPS or official recorded co-ordinates
4co-ordinates scaled from a detailed map
3co-ordinates scaled from a bad map
2co-ordinates of the nearest village
1co-ordinates of the nearest town
0no data
3

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Ancient clam gardens on Quadra Island
Ancient clam gardens on Quadra Island submitted by Flickr : Clam Gardening 2011 - Trip 4 Site in Canada Image copyright: localleaflover (amy groesbeck), hosted on Flickr and displayed under the terms of their API. (Vote or comment on this photo)
British Columbia: Clam gardens were part of a range of marine resource management practices employed by Northwest Coast First Peoples to enhance food production and increase food security. These features were made by constructing rock walls at the low tide line of sheltered, soft-sediment embayments, transforming sloping clam beaches into more level terraces.

More at http://www.eopugetsound.org

Photos from Amy Groesbeck's practical research which proved the effectiveness of clam gardens, more details below

Note: Other clam garden sites on the Portal at Gibsons Beach and the Glenrose Cannery site.
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Ancient clam gardens on Quadra Island
Ancient clam gardens on Quadra Island submitted by bat400_photo : Ancient clam gardens on Quadra Island, BC, Canada, are intertidal beach terraces built by humans by constructing a rock wall at low tide typically between 0.7–1.3 m above chart datum. Quadra Island clam gardens range in size and shape but generally create shallow sloping intertidal terraces encompassing tidal heights of 0.9–1.5 m above chart datum. doi:10.1371/journal.pone.0091235.g001 ... (Vote or comment on this photo)

Ancient clam gardens on Quadra Island
Ancient clam gardens on Quadra Island submitted by Flickr : Quadra Clam Gardens Tide Series III Site in Canada 7-12 photos by Anne Salomon Image copyright: localleaflover (amy groesbeck), hosted on Flickr and displayed under the terms of their API. (Vote or comment on this photo)

Ancient clam gardens on Quadra Island
Ancient clam gardens on Quadra Island submitted by Flickr : Clam Gardening 2011 - Trip 2 Site in Canada May 2011 Image copyright: localleaflover (amy groesbeck), hosted on Flickr and displayed under the terms of their API. (Vote or comment on this photo)

Ancient clam gardens on Quadra Island
Ancient clam gardens on Quadra Island submitted by Flickr : Clam Gardening 2011 - Trip 3 Site in Canada Image copyright: localleaflover (amy groesbeck), hosted on Flickr and displayed under the terms of their API. (Vote or comment on this photo)

Ancient clam gardens on Quadra Island
Ancient clam gardens on Quadra Island submitted by Flickr : Clam Gardening 2011 - Trip 4 Site in Canada metal on the outside, squishy on the inside Image copyright: localleaflover (amy groesbeck), hosted on Flickr and displayed under the terms of their API. (Vote or comment on this photo)

Ancient clam gardens on Quadra Island
Ancient clam gardens on Quadra Island submitted by Flickr : Clam Gardening 2011 - Trip 4 Site in Canada Image copyright: localleaflover (amy groesbeck), hosted on Flickr and displayed under the terms of their API.

Ancient clam gardens on Quadra Island
Ancient clam gardens on Quadra Island submitted by Flickr

Ancient clam gardens on Quadra Island
Ancient clam gardens on Quadra Island submitted by Flickr

Ancient clam gardens on Quadra Island
Ancient clam gardens on Quadra Island submitted by Flickr : Clam Gardening 2011 - Trip 6 Site in Canada Image copyright: localleaflover (amy groesbeck), hosted on Flickr and displayed under the terms of their API.

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Nearby sites listing. In the following links * = Image available
 68.3km SSE 163° Comox Estuary* Ancient Village or Settlement
 69.4km SE 133° Pictographs near Powell River ferry terminal Rock Art
 69.6km SSE 164° Comox Harbor Ancient Fish Trap* Ancient Mine, Quarry or other Industry
 110.6km SSE 168° Sproat Lake Petroglyphs* Rock Art
 127.7km ESE 123° Salmon Inlet Barrow Cemetery
 138.1km SE 129° shíshálh Nation tems swiya Museum Museum
 156.5km SE 142° Petroglyph Provincial Park (British Columbia)* Rock Art
 156.8km SE 139° Lock Bay Site* Rock Art
 163.3km SE 140° Cedar by the Sea Petroglyphs* Rock Art
 166.1km SE 138° Degnen Bay Site* Rock Art
 180.1km SE 127° Museum of Anthropology - University of British Columbia* Museum
 183.3km SE 125° Skalsh Rock* Rock Outcrop
 183.4km SE 124° Coast Salish Stone Fish Weir* Stone Row / Alignment
 185.2km SE 124° Xwayzway Village* Ancient Village or Settlement
 205.9km SE 126° Sewqueqsen Settlement at St.Mungo Cannery* Ancient Village or Settlement
 205.9km SE 126° Glenrose Cannery* Ancient Village or Settlement
 206.4km SE 131° Tsawwassen Long House Site* Ancient Village or Settlement
 215.8km SSE 168° Makah Cultural and Research Center Museum
 223.3km SE 127° P'Quals White Rock* Natural Stone / Erratic / Other Natural Feature
 235.8km S 171° Ozette Ancient Village or Settlement
 238.1km S 171° Wedding Rock* Rock Art
 247.8km ESE 119° Xaytem Ancient Native Settlement* Ancient Village or Settlement
 251.0km SSE 150° Race Rocks Ecological Reserve* Ring Cairn
 253.5km NNW 337° Nuxalk Petroglyphs Rock Art
 257.6km ESE 120° Sumas Lightning Rock* Natural Stone / Erratic / Other Natural Feature
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"Ancient clam gardens on Quadra Island" | Login/Create an Account | 3 News and Comments
  
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Mysteries of Ancient Clam Gardens (Video) by Andy B on Sunday, 01 February 2015
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Native Watchman of the Mamalilikulla Qwe'Qwa'Sot'Em territory, Tom Sewid, takes us on a tour of the ancient clam gardens (lo'hewae) of coastal British Columbia.

http://www.youtube.com/watch?v=DIGn4yd15_I

http://dashpointpirate.typepad.com/the_dash_point_pirate_woo/2013/08/the-mysteries-of-british-columbias-ancient-clam-gardens-revealed.html
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Man-made ‘gardens’ shown to dramatically increase size of shellfish by Andy B on Sunday, 01 February 2015
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B.C. clams reveal an ancient secret (with video)

First Nations “clam gardens” dramatically increase the survival, growth rate and size of shellfish using materials as simple as boulders and crushed shells, according to a new study by researchers at Simon Fraser University and the University of Washington.

A collaborative project by marine ecologists and archeologists studied clam growth in ancient stone-walled beach terraces created over the last few thousand years. The team recorded four times as many butter clams and twice as many littlenecks in clam gardens compared with unaltered beaches.

http://www.vancouversun.com/technology/clams+reveal+ancient+secret/9637658/story.html
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Ancient Clam Gardens Increased Shellfish Production: Adaptive Strategies from Past by Andy B on Sunday, 01 February 2015
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Ancient Clam Gardens Increased Shellfish Production: Adaptive Strategies from the Past by Amy S. Groesbeck, Kirsten Rowell, Dana Lepofsky, Anne K. Salomon

Maintaining food production while sustaining productive ecosystems is among the central challenges of our time, yet, it has been for millennia. Ancient clam gardens, intertidal rock-walled terraces constructed by humans during the late Holocene, are thought to have improved the growing conditions for clams.

We tested this hypothesis by comparing the beach slope, intertidal height, and biomass and density of bivalves at replicate clam garden and non-walled clam beaches in British Columbia, Canada. We also quantified the variation in growth and survival rates of littleneck clams (Leukoma staminea) we experimentally transplanted across these two beach types. We found that clam gardens had significantly shallower slopes than non-walled beaches and greater densities of L. staminea and Saxidomus giganteus, particularly at smaller size classes.

Overall, clam gardens contained 4 times as many butter clams and over twice as many littleneck clams relative to non-walled beaches. As predicted, this relationship varied as a function of intertidal height, whereby clam density and biomass tended to be greater in clam gardens compared to non-walled beaches at relatively higher intertidal heights. Transplanted juvenile L. staminea grew 1.7 times faster and smaller size classes were more likely to survive in clam gardens than non-walled beaches, specifically at the top and bottom of beaches.

Consequently, we provide strong evidence that ancient clam gardens likely increased clam productivity by altering the slope of soft-sediment beaches, expanding optimal intertidal clam habitat, thereby enhancing growing conditions for clams. These results reveal how ancient shellfish aquaculture practices may have supported food security strategies in the past and provide insight into tools for the conservation, management, and governance of intertidal seascapes today.

http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0091235
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