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https://hdl.handle.net/1959.11/22123
Title: | Using a rainforest-flame forest mosaic to test the hypothesis that leaf and litter fuel flammability is under natural selection | Contributor(s): | Clarke, Peter J (author); Prior, Lynda D (author); French, Ben J (author); Vincent, Ben (author); Knox, Kirsten J E (author); Bowman, David M J S (author) | Publication Date: | 2014 | DOI: | 10.1007/s00442-014-3071-y | Handle Link: | https://hdl.handle.net/1959.11/22123 | Abstract: | We used a mosaic of infrequently burnt temperate rainforest and adjacent, frequently burnt eucalypt forests in temperate eastern Australia to test whether: (1) there were differences in flammability of fresh and dried foliage amongst congeners from contrasting habitats, (2) habitat flammability was related to regeneration strategy, (3) litter fuels were more flammable in frequently burnt forests, (4) the severity of a recent fire influenced the flammability of litter (as this would suggest fire feedbacks), and (5) microclimate contributed to differences in fire hazard amongst habitats. Leaf-level comparisons were made among 11 congeneric pairs from rainforest and eucalypt forests. Leaflevel ignitability, combustibility and sustainability were not consistently higher for taxa from frequently burnt eucalypt forests, nor were they higher for species with fire-driven recruitment. The bulk density of litter-bed fuels strongly influenced flammability, but eucalypt forest litter was not less dense than rainforest litter. Ignitability, combustibility and flame sustainability of community surface fuels (litter) were compared using fuel arrays with standardized fuel mass and moisture content. Forests previously burned at high fire severity did not have consistently higher litter flammability than those burned at lower severity or long unburned. Thus, contrary to the Mutch hypothesis, there was no evidence of higher flammability of litter fuels or leaves from frequently burnt eucalypt forests compared with infrequently burnt rainforests. We suggest the manifest pyrogenicity of eucalypt forests is not due to natural selection for more flammable foliage, but better explained by differences in crown openness and associated microclimatic differences. | Publication Type: | Journal Article | Source of Publication: | Oecologia, 176(4), p. 1123-1133 | Publisher: | Springer | Place of Publication: | Germany | ISSN: | 1432-1939 0029-8549 |
Fields of Research (FoR) 2008: | 070503 Forestry Fire Management 050102 Ecosystem Function 060308 Life Histories |
Fields of Research (FoR) 2020: | 300706 Forestry fire management 410203 Ecosystem function 310408 Life histories |
Socio-Economic Objective (SEO) 2008: | 961004 Natural Hazards in Forest and Woodlands Environments 960906 Forest and Woodlands Land Management 970105 Expanding Knowledge in the Environmental Sciences |
Socio-Economic Objective (SEO) 2020: | 180607 Terrestrial erosion 180603 Evaluation, allocation, and impacts of land use 280111 Expanding knowledge in the environmental sciences |
Peer Reviewed: | Yes | HERDC Category Description: | C1 Refereed Article in a Scholarly Journal |
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Appears in Collections: | Journal Article |
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