The initial environment would be a harsh/hostile environment which few species would be adapted to. The volcanic rock would have to be broken down to form humus, only a little or none would have been available.
After the pioneer species break down the rock into humus/soil, primary coloniser plants are able to establish roots. After they die and decompose, they add to the organic matter of the soil, nitrate content and allow more plants to grow.
One to one online tuition can be a great way to brush up on your Biology knowledge.
Have a Free Meeting with one of our hand picked tutors from the UK’s top universitiesFind a tutor