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On World Water Day, scientists study spawning salmon through a riverbed lens

A pink salmon on riverbed sediment.

NSF Critical Zone Observatory scientists studied rivers and salmon species such as pink salmon.

Credit: Wikimedia Commons/NPS


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The Shasta River, northern California.

The research included salmon in rivers like the Shasta in northern California.

Credit: Brandon Overstreet


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A male sockeye salmon resting in creek shallows.

A male sockeye salmon rests in the shallows of Scotch Creek in British Columbia.

Credit: Brandon Overstreet


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A researcher taking measurements in a creek.

Researchers measured conditions in Scotch Creek, British Columbia, home to sockeye salmon.

Credit: Brandon Overstreet


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A female pink salmon moving sediment to build a nest.

A female pink salmon in South Prairie Creek, Washington, builds a redd by excavating sediment.

Credit: Brandon Overstreet


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A researcher takes observations from a grid placed in a creek to study spawning and sediment grain size.

A grid was placed in South Prairie Creek, Washington, to study spawning and sediment grain size.

Credit: Brandon Overstreet


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