Nurse Log

forest · ecology · plants · decomposition

Dead trees help new trees. When a big tree falls down in the forest, it doesn't just disappear. Instead, it becomes a nurse log, which is like a nursery bed for baby trees. The fallen log gives seedlings a safe, nutrient-rich place to sprout and grow.

The perfect growing spot. A nurse log offers seedlings many things they need: water to drink, thick moss to cushion their roots, nutrients from decaying wood, and protection from harmful diseases lurking in the soil. It's like nature's ideal garden bed.

Safety from sickness. Some soil contains bad germs and fungi that attack baby trees of certain species. A nurse log sits above the ground, so seedlings growing on it can escape these nasty pathogens and survive much better than seeds planted in regular soil.

Light and shade balance. The nurse log provides the perfect balance of sunlight and shade that young seedlings need. Too much sun can burn delicate baby plants, and too much shade stops them from growing, but a nurse log in a forest offers just the right amount of each.

Helper fungi live there. Special underground fungi called mycorrhizae grow on and around nurse logs. These helpful fungi connect to plant roots and help them absorb water and nutrients from the decaying wood, making the seedlings grow faster and stronger.