Giant tortoises once inhabited all the continents on Earth, with the exception of Antarctica. As the human population grew and people began to colonise new areas, the large tortoises were hunted, providing an easy, and apparently rather tasty food source to settlers. The giant tortoises were hunted to extinction. Only oceanic islands provided a safe haven, albeit […]

Biodiversity can help to stabilise an ecosystem and reduce the overall impact of density-dependent and density-independent factors. Biodiversity is a measure of the difference between the living organisms within an ecosystem. With many endemic species and a great range of wildlife, Galapagos has a high level of biodiversity.