Abstract:
Total legume density was significantly
higher in annually burned prairie (8.0 stems/m2)
than in unburned prairie (3.0 stems/ m2).
Densities of six species were higher (P<.05) in
burned than in unburned prairie, whereas only
one legume species decreased from annual fire.
Total legume biomass did not differ between
burned (11.3 g/m2) and unburned prairie (10.5
g/m2). Most legume species either are favored
by fire or are fire tolerant, and their persistence
in annually burned grassland suggests that they
may play an important role in the nitrogen
budget of tallgrass prairie.