We are told the natural world is ‘breaking down’. But forests don’t work like aeroplanes or human hearts ...

An ecosystem is normally defined as a complex of all living (plants, animals, microorganisms) and non-living (soil, climate) components interacting as a functional unit in a certain area. Each ...

Visit NAP.edu/10766 to get more information about this book, to buy it in print, or to download it as a free PDF. Ecosystems are composed of the plants, animals, people, and other living things that ...

Around the world, rainforests are becoming savanna or farmland, savanna is drying out and turning into desert, and icy tundra is thawing. Indeed, scientific studies have now recorded "regime shifts" ...