Wildfire through time: shaped by climate and people

By Dulcinea Groff

Picture the landscape of a tropical savanna, composed of grasses, shrubs and a sparse number of trees.  The savanna biome is dominated by a wet season supplying thousands of herbivores with forage and a dry season accompanied by intense lightning and fire.  These wildfires maintain the savanna as grassland by killing the saplings (suppressing tree growth) and the grasses quickly regenerate.  Imagine early hominids in the fire-constructed savanna, they begin to use fire, control fire and even make it!  Fire is a permanent link now between biome and human.

Fire was used by humans for presumably many reasons:  communication, prepare food, drive and corral prey, warmth during cold periods, etc.  Humans have long suppressed and ignited fires for various reasons.  In fact, as a source of ignition, humans have been shaping landscapes since the earliest known hominids were thought to use fire one million years ago in South Africa (Berna et al. 2012). Continue reading