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SPECIES RESPONSES TO FIRE ON THE FLORIDA LAKE WALES RIDGE

 

作者: Warren G. Abrahamson,  

 

期刊: American Journal of Botany  (WILEY Available online 1984)
卷期: Volume 71, issue 1  

页码: 35-43

 

ISSN:0002-9122

 

年代: 1984

 

DOI:10.1002/j.1537-2197.1984.tb12482.x

 

出版商: Wiley

 

数据来源: WILEY

 

摘要:

The responses of native plant species to prescribed and lightning‐caused burns were recorded using permanent line transects and quadrats, sampled over a 5‐yr period, 1977–1982. The dominant species of more frequently burned associations (southern ridge sandhills, scrubby flatwoods, flatwoods, swales, and seasonal ponds) either recover from fire by sprouting or survive by resisting fire, rather than by seeding. The dominants of less frequently burned associations (sand pine and rosemary scrub) are killed by fire and recover by seeding.Quercus myrtifolia, Q. inopina, Q. chapmanii, Q. geminata, Serenoa repens,andSabal etoniaexhibited resiliency, rapidly returning to their preburn levels of dominance. Of the palmettos,Serenoaresponded more vigorously thanSabal.Vegetation measures forGaylussacia dumosaandVaccinium myrsinitesincreased and then decreased dramatically after fire with 2‐, and 3‐ to 4‐yr cycles, respectively.Myrica ceriferavarpusilla, Quercus minima,andHypericum reductumwere more gradual in their responses. A strong inverse relationship, mediated by both abiotic and biotic factors, was found between density and accumulated aboveground biomass inHypericum edisonianum. Pinus elliottiivardensashowed a high degree of resistance to fire with several abiotic and biotic variables affecting mortality. A number of species exhibited an increased incidence of flowering after fire. Late spring/summer fires stimulated a vigorous flowering response inAristida stricta, Panicum abscissum,andAndropogonspp., whereas winter fires encouraged only a vegetative response. The ridge species do not require fire in the sense of maintaining a fire subclimax. Rather, fire revitalizes species’ populations, but does not initiate succession in the Clementsian sense.

 

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