The Fish That Feed Forests

Each year, millions of salmon make an extraordinary journey from the ocean back to the streams where they were born. After traveling hundreds of miles inland to spawn, these fish leave behind a remarkable gift for the forests that surround their spawning grounds: a rich supply of nutrients gathered during their years at sea.

When salmon die after spawning, their bodies release valuable nitrogen and phosphorus into freshwater ecosystems. Bears, eagles, wolves, and other wildlife help spread these nutrients by carrying salmon into nearby forests, while insects and microbes break down the remains. The nutrients seep into soils, nourishing trees and other plants that might otherwise have limited access to these essential building blocks.

Nitrogen from salmon helps trees produce chlorophyll, the pigment that captures sunlight for photosynthesis, and supports the formation of proteins needed for new leaves, needles, and shoots. Phosphorus plays a key role in root development, energy transfer within plant cells, and seed production. Together, these nutrients can boost tree growth, increase leaf creation and improve overall forest productivity. Scientists have found that trees growing near salmon-bearing streams often grow faster and healthier, and the benefits ripple throughout the ecosystem by supporting insects, birds, and mammals that depend on lush vegetation.

Salmon remind us that nature relies upon an intricate web of relationships. By delivering ocean-sourced nitrogen and phosphorus to inland streams, salmon help fuel the growth of towering trees, lush vegetation, and the countless creatures that depend on them. It's a remarkable journey that transforms a fish's final act into new life for an entire ecosystem.