By Dr. Glen Barry, from his blog

Ultimately, all humanity and all life have is the biosphere, the thin layer of life just above and below Earth’s surface, composed of ancient, miraculously evolved natural ecosystems. The natural Earth is a marvel – a complex coupling of species within ecosystems, whereby life begets life.

Ecology is far more than the study of life and its environment. The word is used here as a synonym for ecosystems – the vibrant connections that emerge between species across scales, which cumulatively make life on Earth possible.