Why coast redwoods and giant sequoias in the PNW?

Why coast redwoods and giant sequoias in the PNW?

In the Pacific Northwest, we are most familiar with western redcedar, douglas fir, sitka spruce, and more. These evergreen trees give the Pacific Northwest an identity as an emerald haven on the upper left coast of the U.S. With the changing climate, many of the native trees in the PNW are not as well suited for rising temperatures and increased drought year over year. Planting more redwoods and sequoias with our existing native trees will strengthen our ecosystems.

Coast redwoods and giant sequoias grow and thrive in the PNW. They have unique characteristics which help them grow mightily:

  1. They live over 1000 years longer than other PNW species because of their fire resistance and decay resistance, so the carbon storage is more stable.
  2. Coast redwoods in particular, have the genetic ability to adapt more than most other species because they have six sets of chromosomes.
  3. Redwoods are less likely to fall prey to invasive pests (arguably a more important risk to our local species than climate change) because they produce so many toxic compounds and have microbial symbionts that protect them.
  4. Fire resistance is the ability to survive a fire relatively unscathed (i.e., thick bark as insulation).  Redwoods have both fire resistance and fire resilience, which is the ability to take considerable damage in a fire, but rebound afterwards (i.e., resprouting).
  5. They can regrow shoots from scalded branches, the trunk, and the roots. They essentially don’t die.
  6.  Redwoods were once much more widely distributed and their current limited range is due to glaciation, not environmental mismatch.
  7. The only reason they are not already here is that migration has not kept pace with climate suitability.
  8. Once redwoods are established you do not need to rely on seed production to regenerate a forest that has been logged or burned.
  9. Redwood stumps re-sprout from the roots, and because these new sprouts have an extensive root system in place, they quickly outgrow competing vegetation (much faster than other conifers).
  10. This eliminates some of the largest cost inputs in forestry: nurseries, planting, and herbicides to control competing vegetation.
  11. From a biodiversity perspective, redwoods should be considered an integral part of a functioning ecosystem including many PNW natives. They should be planted with other species, not in mono-cultures.

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