The role of topkill in the differential response of savanna woody species to fire

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Is there a ‘browse trap’? Dynamics of herbivore impacts on trees and grasses in an African savanna (2014, background): “Trees >2–3 m in height are rarely affected by fire (Hoffmann & Solbrig 2003; Prior, Williams & Bowman 2010), such that fire affects the establishment, rather than the mortality, of savanna trees.”
Plant size and resprouting ability: trading tolerance and avoidance of damage? (2006, background): “The probability of stem-kill by disturbance such as browsing or low-intensity fire is reduced in larger plants (Burrows 1985; Hoffmann & Solbrig 2003 ), in the sense both of larger individuals of a given species and of species with potentially large mature size.”
Defining pyromes and global syndromes of fire regimes (2013, background): “Changes in frequency or intensity of fires can alter vegetation community composition by promoting or excluding different types of plants (1, 2), and are important for feedbacks between vegetation and fire (26, 27).”
A patch-dynamics approach to savanna dynamics and woody plant encroachment – Insights from an arid savanna (2006, background): “However, mortality and topkill decrease with seedling size (Danthu et al., 2003; Hoffmann and Solbrig, 2003; but see Meyer et al., 2005).”