In Pantanal wetlands, fire timing interacted with flooding and herbivory
WHAT THE EVIDENCE SAYS
Researchers compared fire treatments and flood-level zones across 32 one-hectare plots in the Brazilian Pantanal, with biomass indicators of herbivory. In lower-flood areas, some lower-intensity early and late fires supported higher diversity, while high-intensity modal fires reduced taxonomic and functional diversity, especially where inundation was high; the modeled herbivory interaction sometimes compounded losses.
WHY IT MATTERS / OUR READ
The ecological unit for prescribed-fire planning should include local hydrology and grazing context. A mosaic of burn timing and flood environments may support distinct vegetation trajectories where a rigid fire interval would erase useful variation.
CAVEATS / UNCERTAINTY
The experiment is specific to sampled Pantanal communities and treatment definitions, and herbivory was inferred from biomass rather than independently randomized grazing access. Its results do not supply a transferable burn calendar.
SOURCE
Pereira et al. · Wetlands Ecology and Management · Pantanal fire-flood study
View original evidence ↗
Experimental plots show that one burn regime cannot represent the ecological needs of an entire floodplain.
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