Experimental investigation of fire ecology in the C3 and C4 subspecies of Alloteropsis semialata

作者: Brad Ripley , Gillian Donald , Colin P. Osborne , Trevor Abraham , Tarryn Martin

DOI: 10.1111/J.1365-2745.2010.01700.X

关键词: FlammabilityCanopyProductivity (ecology)Biomass (ecology)BiologyHerbaceous plantFire ecologyEcologySpecific leaf areaFire regime

摘要: Summary 1. C4 grasses possess characteristics that potentially advantage growth in fire-prone environments, including high photosynthetic productivity, efficient light and nutrient use significant allocation to below-ground reserves reproduction. Such allow fast regeneration after fire, may be the consequence of physiology, phylogenetic ancestry or have been acquired as adaptations frequently burnt environments. 2. The aim this study was examine role pathway by comparing fire ecology closely related C3 C4 subspecies Alloteropsis semialata. Its focus on above-ground would contribute a fuel load, re-growth responses plants subsequent controlled experimental burn during natural winter season. 3. Prior burn, but frost, biomass entirely dead plants, more flammable than plants. maintained 33% their canopy alive despite frosts hence lost proportion living tissue burn. 4. Subsequent did not recover biomass, area returned its pre-burn level through production leaves with greater specific leaf area. There little evidence remobilization reserves, which were less half size reserves. Re-growth strongly supported reallocation similar for control although had weak stimulatory effect re-growth. 5. Synthesis. Differences A. semialata indicated is better adapted fire. Not only it produce detrimentally affected recovered rapidly subspecies, without requirement altered allometry. direct an indirect adaptation environments differing regimes.

参考文章(41)
J. C. Vogel, R. P. Ellis, A. Fuls, Photosynthetic pathways and the geographical distribution of grasses in South West Africa/Namibia. South African Journal of Science. ,vol. 76, pp. 307- 314 ,(1980)
M.E. Gilbert, B.S. Ripley, The effect of smoke on the photosynthetic gas exchange of Chrysanthemoides monilifera South African Journal of Botany. ,vol. 68, pp. 525- 531 ,(2002) , 10.1016/S0254-6299(15)30380-X
Colin P. Osborne, Robert P. Freckleton, Ecological selection pressures for C4 photosynthesis in the grasses. Proceedings of The Royal Society B: Biological Sciences. ,vol. 276, pp. 1753- 1760 ,(2009) , 10.1098/RSPB.2008.1762
W. J. BOND, G. F. MIDGLEY, F. I. WOODWARD, The importance of low atmospheric CO2 and fire in promoting the spread of grasslands and savannas Global Change Biology. ,vol. 9, pp. 973- 982 ,(2003) , 10.1046/J.1365-2486.2003.00577.X
B. Rice, M. Westoby., Regeneration after fire in Triodia R. Br Austral Ecology. ,vol. 24, pp. 563- 572 ,(1999) , 10.1046/J.1442-9993.1999.01004.X
William J. Bond, Guy F. Midgley, A proposed CO2‐controlled mechanism of woody plant invasion in grasslands and savannas Global Change Biology. ,vol. 6, pp. 865- 869 ,(2000) , 10.1046/J.1365-2486.2000.00365.X
E.R. Robinson, G. Elizabeth Gibbs Russell, W.S.W. Trollope, B.H. Downing, Short‐term burning treatments and ecological interactions in the herb layer of false thornveld of the eastern province African Journal of Range & Forage Science. ,vol. 14, pp. 79- 83 ,(1979) , 10.1080/00725560.1979.9648864
Sheila D.S. Chiwocha, Kingsley W. Dixon, Gavin R. Flematti, Emilio L. Ghisalberti, David J. Merritt, David C. Nelson, Julie-Anne M. Riseborough, Steven M. Smith, Jason C. Stevens, Karrikins: A new family of plant growth regulators in smoke Plant Science. ,vol. 177, pp. 252- 256 ,(2009) , 10.1016/J.PLANTSCI.2009.06.007
William J. Bond, B. W. Van Wilgen, Fire and Plants ,(1995)