USGS Multimedia Gallery
Title: Collapse-scar bogs formed following permafrost thaw
When permafrost thaws, the ground surface subsides and becomes inundated and the black spruce forest growing on the permafrost can no longer survive. Trees teetering and falling over in thawing permafrost are often referred to as "drunken trees." The black spruce forest is replaced by a saturated bog, dominated by sedges and mosses. This wholesale ecological transformation has large impacts on carbon cycling.
Location: Innoko National Wildlife Refuge, AK, USA
Date Taken: September 2012
Photographer: Miriam Jones , U.S. Geological Survey
Usage: This image is public domain/of free use unless otherwise stated. Please refer to the USGS Copyright section for how to credit the photo.
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