Journal
GEOPHYSICAL RESEARCH LETTERS
Volume 42, Issue 14, Pages 5855-5864Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1002/2015GL064441
Keywords
driftwood; Great Slave Lake; wood; biogeomorphology; landscape evolution
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Funding
- National Geographic Research CRE grant [9183-12]
- Geological Society of America Graduate Grants
- Warner College of Natural Resources, Colorado State University
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This research demonstrates how vegetation interacts with physical processes to govern landscape development. We quantify and describe interactions among driftwood, sedimentation, and vegetation for Great Slave Lake, which is used as proxy for shoreline dynamics and landforms before deforestation and wood removal along major waterways. We introduce driftcretion to describe large, persistent concentrations of driftwood that interact with vegetation and sedimentation to influence shoreline evolution. We report the volume and distribution of driftwood along shorelines, the morphological impacts of driftwood delivery throughout the Holocene, and rates of driftwood accretion. Driftcretions facilitate the formation of complex, diverse morphologies that increase biological productivity and organic carbon capture and buffer against erosion. Driftcretions should be common on shorelines receiving a large wood supply and with processes which store wood permanently. We encourage others to work in these depositional zones to understand the physical and biological impacts of large wood export from river basins.
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