Wildfire-Induced alterations in soil physical, chemical, and micromorphological properties in forest ecosystems of Yunnan, Southwestern China

Description

Wildfire changes soil as surely as it changes the forest above it. Yongchao Duan and Zhibin Liu studied soil from a mountain forest in Yunnan, China, that burned severely in 2019, comparing samples from burned ground and nearby unburned ground at three depths. The strongest changes sat in the top five centimeters. Burned soil held more sand and less clay, had fewer pores, and stored less water. Its acidity dropped while its carbon, phosphorus, and potassium levels fell, and deeper layers changed much less.

Under the microscope, the burned soil showed broken-down aggregates, charred root pieces, scattered fungal threads, and many charcoal particles. A measure of soil structure showed more fragmentation after the fire, matching the loss of pores and stability. The authors argue that judging fire damage calls for physical, chemical, and microscopic checks together, and that their findings can guide recovery work as wildfires grow more frequent.

Catalog record

Source: https://europepmc.org/articles/PMC12852705