Original Research

Experimental burn plot trial in the Kruger National Park: history, experimental design and suggestions for data analysis

R. Biggs, H.C. Biggs, T.T. Dunne, N. Govender, A.L.F. Potgieter
Koedoe | Vol 46, No 1 | a35 | DOI: https://doi.org/10.4102/koedoe.v46i1.35 | © 2003 South African National Parks
Submitted: 17 December 2003 | Published: 17 December 2003

About the author(s)

R. Biggs, CSIR Environmentek,, South Africa
H.C. Biggs, South African National Parks, South Africa
T.T. Dunne, University of Cape Town, South Africa
N. Govender, South African National Parks, South Africa
A.L.F. Potgieter, South African National Parks, South Africa

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Abstract

The experimental burn plot (EBP) trial initiated in 1954 is one of few ongoing long-termfire ecology research projects in Africa. The trial aims to assess the impacts of differentfire regimes in the Kruger National Park. Recent studies on the EBPs have raised questions as to the experimental design of the trial, and the appropriate model specificationwhen analysing data. Archival documentation reveals that the original design was modified on several occasions, related to changes in the park's fire policy. These modifications include the addition of extra plots, subdivision of plots and changes in treatmentsover time, and have resulted in a design which is only partially randomised. The representativity of the trial plots has been questioned on account of their relatively small size,the concentration of herbivores on especially the frequently burnt plots, and soil variation between plots. It is suggested that these factors be included as covariates inexplanatory models or that certain plots be excluded from data analysis based on resultsof independent studies of these factors. Suggestions are provided for the specificationof the experimental design when analysing data using Analysis of Variance. It is concluded that there is no practical alternative to treating the trial as a fully randomisedcomplete block design.

Keywords

Burn plots; Fire; Policy; Experimental design; Season; Frequency

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Koedoe  vol: 62  issue: 1  year: 2020  
doi: 10.4102/koedoe.v62i1.1617

73. The first sub-meter resolution digital elevation model of the Kruger National Park, South Africa
Kai Heckel, Marcel Urban, Jean-Sébastien Bouffard, Jussi Baade, Peter Boucher, Andrew Davies, Evan G. Hockridge, Wolfgang Lück, Jonas Ziemer, Izak Smit, Bernhard Jacobs, Mark Norris-Rogers, Christiane Schmullius
KOEDOE - African Protected Area Conservation and Science  vol: 63  issue: 1  year: 2021  
doi: 10.4102/koedoe.v63i1.1679

74. Fire frequency drives habitat selection by a diverse herbivore guild impacting top–down control of plant communities in an African savanna
Deron E. Burkepile, Dave I. Thompson, Richard W. S. Fynn, Sally E. Koerner, Stephanie Eby, Navashni Govender, Nicole Hagenah, Nathan P. Lemoine, Katherine J. Matchett, Kevin R. Wilcox, Scott L. Collins, Kevin P. Kirkman, Alan K. Knapp, Melinda D. Smith
Oikos  vol: 125  issue: 11  first page: 1636  year: 2016  
doi: 10.1111/oik.02987

75. Monitoring herbaceous fuel moisture content with SPOT VEGETATION time-series for fire risk prediction in savanna ecosystems
J. Verbesselt, B. Somers, S. Lhermitte, I. Jonckheere, J. van Aardt, P. Coppin
Remote Sensing of Environment  vol: 108  issue: 4  first page: 357  year: 2007  
doi: 10.1016/j.rse.2006.11.019

76. Effects of fire history and N and P fertilization on seedling biomass, Specific Leaf Area, and root:shoot ratios in a South African savannah
Ricardo M. Holdo
South African Journal of Botany  vol: 86  first page: 5  year: 2013  
doi: 10.1016/j.sajb.2013.01.005

77. The pyrodiversity–biodiversity hypothesis: a test with savanna termite assemblages
Andrew B. Davies, Paul Eggleton, Berndt J. van Rensburg, Catherine L. Parr
Journal of Applied Ecology  vol: 49  issue: 2  first page: 422  year: 2012  
doi: 10.1111/j.1365-2664.2012.02107.x

78. Determinants of fire intensity in working landscapes of an African savanna
Paul Laris, Rebecca Jacobs, Moussa Koné, Fadiala Dembélé, Christine M. Rodrigue
Fire Ecology  vol: 16  issue: 1  year: 2020  
doi: 10.1186/s42408-020-00085-x