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Ecological Intelligence

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Ecological Intelligence / Subject

succession

Europe

Fire and clear-cutting leave different fungal forests

Evidence
Peer-reviewed chronosequence with metabarcoding
Geography
Boreal Sweden
System
Boreal forest / wood-inhabiting fungi

WHAT THE EVIDENCE SAYS

Eighteen managed clear-cut and 18 unmanaged fire-origin stands were surveyed with DNA metabarcoding and fruiting bodies. Fire-origin stands averaged around 55 additional fungal species at comparable stand ages and retained most red-listed/indicator taxa.

WHY IT MATTERS / OUR READ

Forest stand age is no substitute for disturbance legacy, deadwood substrate and habitat continuity. Harvest recovery is not equivalent to post-fire succession.

CAVEATS / UNCERTAINTY

Chronosequence sites were not randomly assigned treatments, and stand histories differ in more than fire versus harvest.

SOURCE

Journal of Ecology · primary study
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Boreal deadwood fungal communities retained post-fire species that cutover stands did not recover.

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Peer-reviewed North America

Drought can pre-thin a dry forest before fire imposes a second ecological filter

Evidence
Peer-reviewed
Geography
Chisos Mountains, Big Bend National Park, Texas, USA
System
Dry montane woodland and forest

WHAT THE EVIDENCE SAYS

Long-term plots documented substantial tree-density and basal-area losses during drought before wildfire, followed by further losses in high-severity burns. Species responses were uneven, with piñon, juniper and oak showing especially large cumulative declines and juvenile abundance also reduced.

WHY IT MATTERS / OUR READ

Disturbance sequence matters. A forest already filtered by drought may enter a fire with altered fuels, survivors and regeneration potential, so post-fire trajectories cannot be understood from burn severity alone.

CAVEATS / UNCERTAINTY

The evidence is observational and comes from one mountain range and one disturbance sequence. Severity classes describe realized fire effects rather than a randomized treatment, and longer monitoring is needed to distinguish transition from delayed recovery.

SOURCE

Fire Ecology
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Twenty years of permanent plots in the Chisos Mountains show severe drought mortality followed by high-severity fire can compound into much larger structural change than either disturbance alone suggests.

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