1. Large trees needed to support the nests of large birds, such as eagles and hawks, can be damaged or destroyed.
2. Tree-dwelling animal species, such as birds and squirrels, and animals that depend on shade from trees, can be harmed or may disappear.
3. Heavy logging equipment compacts the soil, making it hard for subterranean animals to survive. Animal burrows are crushed and small plants killed.
4. Woodpeckers, among other bird species, control the populations of harmful insects. When the habitat of these birds is destroyed, insect populations increase and can harm the land.
5. Loss of shade leaves the forest floor exposed to extreme heat. A variety of organisms and plants necessary for forest survival can be damaged.
Poor moisture retention in the ground, because shade has disappeared, makes for potential fire hazards.
6. Amphibian populations which thrive in the moisture rich soil on the forest bottom, can be damaged because of soil disturbance and loss of water quality.
7. Open areas can give way to undesirable plant species as they begin to grow back.
8. Mud in waterways destroys plants and microscopic organisms that
fish and other aquatic life need to survive.
Fishing and swimming become poor. Drinking water supplies can become dirty.
9. Roots of trees which have been cut begin to decay. They give way to loose topsoil and erosion on land and along stream and river banks. This can also contribute to landslides.
10. Silt and slime, products of erosion, wash into streams and can destroy spawning beds.
11. Drastic changes in water conditions can easily kill fragile fish fry and eggs.