The impact and significance of tephra deposition on a Holocene forest environment in the North Cascades, Washington, USA
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Fringe and central core used to determine the spatial scale of tephra impact.

RDA revealed significant local impact of Mazama tephra deposition on Moss Lake.

Impact was on open habitat and aquatic taxa.

No significant impact regionally from any of the tephra deposits.

Regional changes due to underlying climate change.

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