The soil of the tropical rainforest is shallow, poor in nutrients and almost without soluble minerals. Thousands of years of heavy rains have washed away the nutrients in the soil obtained from weathered rocks. Nutrients stay in an ecosystem by being recycled and are mainly found in the living plants and the layers of decomposing leaf litter. Decomposers like insects, bacteria, and fungi turn dead plant and animal matter into nutrients. Plants take up these nutrients the moment they are released.
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