If one species disappears, the effects spread to other species. This interconnection between several species is important to understand in safeguarding the natural heritage of the planet. For example, if the bee were to become extinct, several species of plants would disappear in turn, which would cause food deprivation for herbivores and threaten their survival. This phenomenon is called an extinction cascade. To limit the future effects of these extinction cascades, scientists call for a better understanding of the complexity of ecosystems to save many species.