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# After wildfire, different carbon tracers leave watersheds on different clocks
- URL: https://intelligence.wildlandseco.com/2026-10-12-postfire-carbon-tracers-watersheds/
- Published: 2026-10-12T21:13:06.000Z
- Updated: 2026-10-12T21:13:06.000Z
- Description: Five California coastal watersheds showed an early pulse of fire-derived levoglucosan while black-carbon export was more discharge-driven and became more prominent later.
- Author: Benjamin Worlund
- Tags: wildfire, watershed carbon, black carbon, levoglucosan, Fire, Water, Carbon, Watersheds, disturbance, #ecological-intelligence, #brief-2026-10-12, #global-radar, #peer-reviewed, #geo-north-america

Evidence

Peer-reviewed

Geography

CZU Lightning Complex watersheds, coastal California, USA

System

Post-fire headwater watersheds

## WHAT THE EVIDENCE SAYS

Monitoring after the 2020 CZU fires found levoglucosan concentrations peaking in the earliest post-fire flows and then declining, while black-carbon transport tracked discharge more strongly and increased in relative importance with time since fire. The two tracers therefore represented different mobilization pathways after the same disturbance.

## WHY IT MATTERS / OUR READ

Post-fire water-quality monitoring can miss process if all pyrogenic carbon is treated as one pool. Sampling timing and hydrologic context determine which fire signal is visible.

## CAVEATS / UNCERTAINTY

The study covers five small coastal California watersheds and two carbon tracers, not the complete watershed carbon budget. Transport behavior may differ with geology, burn severity, storm regime and channel structure.

## SOURCE

Biogeochemistry — primary field study  
[View original evidence ↗](https://doi.org/10.1007/s10533-026-01367-3?ref=intelligence.wildlandseco.com)

From the Morning Brief · 2026-10-12

[Read the full Morning Brief →](https://intelligence.wildlandseco.com/morning-brief-2026-10-12/)