Discovering Connections in the Natural World
Living things are connected to each other and to their environment in many fascinating ways. In a sunny field, grasses, clover, and goldenrod capture sunlight to make food by photosynthesis. Rabbits and grasshoppers feed on leaves and shoots, and foxes feed on rabbits and grasshoppers. The wind scatters grass pollen and milkweed seeds, rainfall brings water, and worms turn dead leaves into soil underfoot. These are examples of the many interactions between plants and animals, sunlight, water, and air that go on in a field. Every different environment – field or forest, pond or stream – functions as an ecological system, or “ecosystem.” An ecosystem consists of all the living and nonliving things in a particular place and the ways they are connected. All the organisms in an ecosystem depend on everything else – both living and nonliving – for food and other needs. Continue reading Ecosystems