By all means, rescue an injured koala. But by pulling out weeds after the fires, you could also help rescue a whole ecosystem.
Along with climate change and drought, invasive grasses are promoting wildfires across the US, even in areas that don't normally burn.
Famine weed spreads rapidly and is devastatingly destructive. Biocontrol is one way of dealing with the problem.
Wildfires are expected to increase in a warming world, but there is another way humans are changing the patterns and intensity of fires: by introducing flammable plants to new environments.
Invasive plants have an impact on native species and unless these factors are properly understood, it is difficult to predict what sort of impact invasive plants will have.
For mapping patterns of plant invasion from the sky, understanding plant behaviour on the ground and using it along with remote sensing cameras, is crucial.
Regulating species in South Africa is difficult. But identifying those creating the greatest tension, would shift focus on the most destructive species.
Many alien plants and animals have been introduced to Africa from other regions and spread from country to country, often having devastating effects.