. Bulletin. Science; Natural history; Natural history. FIRE AND VERNAL POOL VEGETATION 71. Month Fig. I. Monthly rainfall at the Miramar Naval Air Station weather station from 1985-86 through 1987-88. The prescribed burn was conducted on 29 October 1986, between 1330 and 1500 hrs. During this period, the temperature was about °C, the relative humidity about 65%, and winds about 10 MPH from the northwest. Immediately before the burn, soda-can pyrometers were positioned to measure the intensity of the fire heat. Soda cans (375 ml) filled with water were placed at the upland end, pool edge, a
. Bulletin. Science; Natural history; Natural history. FIRE AND VERNAL POOL VEGETATION 71. Month Fig. I. Monthly rainfall at the Miramar Naval Air Station weather station from 1985-86 through 1987-88. The prescribed burn was conducted on 29 October 1986, between 1330 and 1500 hrs. During this period, the temperature was about °C, the relative humidity about 65%, and winds about 10 MPH from the northwest. Immediately before the burn, soda-can pyrometers were positioned to measure the intensity of the fire heat. Soda cans (375 ml) filled with water were placed at the upland end, pool edge, and basin end of three transects in each of the experimental pools. Six soda cans were also placed in comparable sites in the control area. Rainfall and temperature data for the study period were obtained for the Weather Bureau station at Miramar Naval Air Station, or, if values for this station were missing, from the station at Montgomery Field (< 5 km distant) or Lindbergh Field (15 km distant). Changes in diversity and cover of the plant community, or major components thereof, in response to control and experimental conditions over the three years were tested by analysis of variance. Responses of individual species were tested by Chi Square contingency analysis of frequencies of different cover classes at stations along the upland-to-basin transects. Soil nutrient data were analyzed by analysis of variance. Results The intensity of the fire was very light in all pool areas. Water losses from pyrometers on the burned plot averaged only percent greater than those from control pyrometers. Immediate post-fire observations along transects of the experimental pools (Table 1) revealed that the upland ends of all transects had. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Southern California Ac
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