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You are here >1Up Info > Wildlife, Animals, and Plants > Plant Species > Shrub > Species: Ambrosia dumosa | White Bursage
 

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FIRE EFFECTS

SPECIES: Ambrosia dumosa | White Bursage
IMMEDIATE FIRE EFFECT ON PLANT : Fire generally kills white bursage. A low-severity fire occurred in the Coachella Valley, California, after 7 years of above normal precipitation. Some white bursage plants survived because the fire burned patchily. However, most white bursage plants burned because their canopies contained numerous small branches in proximity to herbaceous fuels. A few white bursage plants were only scorched; they retained most of their branches and dried foliage. Eighty-nine percent of white bursage plants were killed by the fire [9]. DISCUSSION AND QUALIFICATION OF FIRE EFFECT : NO-ENTRY PLANT RESPONSE TO FIRE : White bursage sprouted at low rates after the low-severity fire in the Coachella Valley, California. Only 6 out of 16 scorched plants and 2 out of 81 burned plants sprouted [9]. White bursage seedling establishment on burned sites was poor during the first growing season after the fire but increased in later growing seasons. Poor seedling establishment was probably unrelated to seed availability since white bursage occurred in adjacent unburned areas [9]. In postfire year 5, cover of white bursage on burned sites was 1 percent while cover on adjacent unburned sites was about 5.8 percent [9]. DISCUSSION AND QUALIFICATION OF PLANT RESPONSE : NO-ENTRY FIRE MANAGEMENT CONSIDERATIONS : Biomass production and thus fuel loadings vary seasonally and annually for white bursage. In 1971 and 1974 in Rock Valley, Nevada, estimated abovegound stem dry mass of white bursage was 31 and 41 grams per square meter, respectively. Net aboveground production was consistently higher in spring than in fall. In 1973, after an above average year of rainfall, flowers and fruits made up almost half of the new tissue produced by white bursage [47].

Related categories for Species: Ambrosia dumosa | White Bursage

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Information Courtesy: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory. Fire Effects Information System

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