An ecosystem is the sum of all the living organism that interact in a system. One of the defining characteristics of an ecosystem is resilience – the ability to recover from a shock. Like a forest after a fire, a healthy ecosystem must be able to bounce back.
On the surface of our skin, lives an invisible layer of billions of microorganisms, microbes, bacteria, fungi that interact with their environment. This ecosystem that we carry with us every day of our lives, like any other, must be resilient. It must be able to recover from shocks like sunburn and dehydration.