Sierra National Forest. Credit: matt/Flickr

About the Dinkey Collaborative ReLeaf Project:

American Forests and the U.S. Forest Service are reforesting 30 acres of Sierra National Forest with 10,000 Jeffery, ponderosa and sugar pine trees, as the forest has shrunk over time because of urban growth and logging. By restoring the forest to levels closer to its original old-growth size, several vulnerable species, including the spotted owl, great grey owl, goshawk, American fisher and Yosemite toad, will have more habitat space.

Global ReLeaf provides forests like this — and the communities that depend on them — with the restoration they need to thrive. Since 1990, American Forests has brought ReLeaf to forests in all 50 states and 45 countries, planting more than 45 million trees in the process.

ReLeaf Location:

Sierra National Forest, CA

Key ReLeaf Activities:

  • Planting 10,000 trees across 30 acres
  • Restoring forest damaged by urban growth
  • Protecting and enhancing habitat for several sensitive species including spotted owl, great grey owl, goshawk, American fisher and Yosemite toad

Why This ReLeaf Project?

This project is part of the Dinkey Collaborative Forest Restoration Project. This is a collaborative effort to restore to a healthy condition forested areas in the Dinkey Creek Drainage. A committee composed of many stakeholders is guiding the project. As part of the restoration effort, small regeneration areas are created, mostly from existing openings. The intent is to create a diversity of tree ages and to increase the proportion of pines in the stands. Jeffery, ponderosa and sugar pine will be planted. In other words, areas previously cut due to logging or urban growth will be replanted in order to maintain species diversity and habitat. This is greatly helpful in maintaining age diversity among the Sierra National Forest’s tree population.

Why Age Diversity?

Age diversity of a forest’s trees is crucial to forest health, as old-growth trees provide shelter from the elements for younger trees, while young growth trees provide “backups” should the old-growth trees die off, as they will be already partially grown, rather than having new saplings sprout from seeds. This ensures that not all trees will die off within a single generation, providing longevity for forests. Furthermore, a range of tree heights throughout a forest provides differing forms of habitat for forest-dwelling wildlife.


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