Impacts of a Prescribed Burn on Vernal Pool Vegetation at Miramar Naval Air Station, San Diego, California
Cox, George W.
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An experimental burn in October 1986 tested the effects of fire on <br /><br />vernal pool vegetation of the coastal mesas of San Diego County. In the two <br /><br />following years, both of which were unusually dry, pool species declined on both <br /><br />burned and unburned areas. In 1987, however, total plant cover was reduced <br /><br />significantly more in burned than in control areas. Within burned basins, relative <br /><br />cover of pool species declined less than in control pools, which showed greater <br /><br />invasion of exotic upland annuals. Pogogyne abramsii and Psilocarphus brevis- <br /><br />simus declined more in burned than in control pools in 1987, but recovered in <br /><br />1988. Burning appeared to increase mineralization and flux of N and P into basins.