1. Trees absorb excess nutrients: Trees are capable of absorbing excess nutrients, such as nitrogen and phosphorus, from the soil. These excess nutrients are often found in fertilizers, animal wastes, and other pollutants, which can lead to algae blooms and other water quality problems. By absorbing these excess nutrients, trees help reduce the amount of nutrients that enter nearby waterways, thereby improving water quality.
2. Trees reduce erosion: Trees help anchor soil in place with their roots, which helps reduce erosion. Erosion can result in sediment, which can reduce water quality by carrying pollutants and nutrients into waterways. Trees also help slow down the flow of rainwater, allowing it to soak into the soil and reducing the amount of runoff that contributes to erosion and sedimentation.
3. Trees filter water: Trees also help filter pollutants out of water. As rainwater filters down through the soil, tree roots absorb pollutants and sediments. The soil itself also acts as a natural filter, removing pollutants and natural impurities as water flows through it. This filtered water then enters local waterways, contributing to cleaner water overall. Some tree species, such as willows and poplars, are particularly effective at filtering pollutants and are often planted in wetlands and other areas where water quality is a concern.
Explain at least three ways trees assist in keeping high water quality.
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