It plays an important role in water conservation and soil and water conservation, and there are "green reservoirs" ...

Forest ecosystem is an ecosystem composed of biological communities (including plants, animals and microorganisms) with trees as the main body and their abiotic environments (light, heat, water, gas, soil, etc.). Forests are mainly composed of trees, which have the functions of soil and water conservation, water conservation and climate regulation. So forest ecosystem is called "green reservoir".

Test center: the knowledge point examined in this question is the characteristics of forest ecosystem. Forest ecosystem has the function of water conservation.