In what way does runoff support life in an ecosystem?

Runoff plays a crucial role in supporting life in an ecosystem primarily because it collects in rivers and lakes, which are essential habitats for various organisms. When precipitation occurs, runoff carries water over land surfaces and transports nutrients, organic matter, and minerals from the surrounding landscape into these water bodies. This influx of water not only helps to maintain the necessary levels for aquatic ecosystems but also enriches the habitats with nutrients that support the growth of phytoplankton and aquatic plants, forming the base of the food web. Consequently, this process nourishes fish, amphibians, and other aquatic organisms that rely on these habitats for survival.

In addition to providing a habitat, the presence of water bodies filled by runoff creates opportunities for biodiversity to flourish and facilitates the exchange of energy and nutrients within the ecosystem. Hence, the collection of runoff in rivers and lakes significantly contributes to the overall health and productivity of ecosystems.