Shoot flammability of vascular plants is phylogenetically conserved and related to habitat fire-proneness and growth form
Cui, Xinglei; Paterson, Adrian M.; Wyse, Sarah; Alam, Md Azharul; Maurin, K. J. L.; Pieper, R.; Padullés Cubino, J.; OConnell, Dean; Donkers, D.; Bréda, J.; Buckley, Hannah L.; Perry, G. L. W.; Curran, Timothy J.
Terrestrial plants and fire have interacted for at least 420 million years. Whether recurrent fire drives plants to evolve higher flammability and what the evolutionary pattern of plant flammability is remain unclear. Here, we show that phylogeny, the susceptibility of a habitat to have recurrent fires (that is, fire-proneness) and growth form are important predictors of the shoot flammability of 194 indigenous and introduced vascular plant species (Tracheophyta) from New Zealand. The phylogenetic signal of the flammability components and the variation in flammability among phylogenetic groups (families and higher taxonomic level clades) demonstrate that shoot flammability is phylogenetically conserved. Some closely related species, such as in Dracophyllum (Ericaceae), vary in flammability, indicating that flammability exhibits evolutionary flexibility. Species in fire-prone ecosystems tend to be more flammable than species from non-fire-prone ecosystems, suggesting that fire may have an important role in the evolution of plant flammability. Growth form also influenced flammability—forbs were less flammable than grasses, trees and shrubs; by contrast, grasses had higher biomass consumption by fire than other groups. The results show that shoot flammability of plants is largely correlated with phylogenetic relatedness, and high flammability may result in parallel evolution driven by environmental factors, such as fire regime.... [Show full abstract]
Keywordsshoot flammability; phylogeny; vascular plants; Plants; Plant Shoots; Fires; Ecosystem; Species Specificity; Biological Evolution; Wildfires
Fields of Research060309 Phylogeny and Comparative Analysis; 060310 Plant Systematics and Taxonomy; 070503 Forestry Fire Management; 070502 Forestry Biomass and Bioproducts; 050102 Ecosystem Function; 060399 Evolutionary Biology not elsewhere classified; 050202 Conservation and Biodiversity
© The Author(s), under exclusive licence to Springer Nature Limited 2020