Ecological system, also known as ecosystem, is the totality of animals, plants and microorganisms and their inanimate environment.
To be truly effective in nature conservation, ecological processes must be understood. For example, it is useless to reintroduce a species of animal or plant that has become extinct if its habitat has been radically altered.
Today, this discipline has a history of about 150 years, so that today’s professionals can draw on the experience accumulated over this period.