Friday, October 9, 2015

Progeny of an Ancient Giant, a Coastal Redwood Grows at Matthaei Botanical Gardens

By Joseph Mooney

A young sprout from one of nature's power carbon keepers—the California coastal redwood— is on display at the University of Michigan Matthaei Botanical Gardens in Ann Arbor, Mich. The sapling is from the roots of the celebrated Fieldbrook stump, one of California’s largest redwoods felled nearly 125 years ago.

Among the planet’s oldest living organisms, coastal redwoods (Sequoia sempervirens) inspire awe with their immense size and longevity.

The Fieldbrook sapling in one of the greenhouses at Matthaei.

Matthaei-Nichols is fortunate to have an example of this North American icon—although on a smaller scale. It came to us as a sapling grown from the tissue of a root of one of the largest coastal redwoods ever recorded. The young tree, which measures about three feet high, is on display beginning October 12 at Matthaei Botanical Gardens.

The sapling is genetically identical to a tree cut down in Humboldt County, California in the late 1800s. The original tree measured over 30 feet in diameter (not including the bark) and its stump could easily accommodate dozens of people, as shown in the undated picture at left taken by A.W. Hendrickson (photo © Humboldt State University). Many trees---redwoods among them---send up sprouts or suckers after the parent tree has been felled or damaged, allowing the tree to regenerate. One family of trees native to Michigan, the ashes, exhibits this trait.

Some interesting facts about giant coastal redwoods:

  • ·         Their bark can be as much as 12 inches thick. This makes the trees resistant to fire damage.
  • ·         The trees may live up to 2,000 years
  • ·         Their branches may be as wide as 5 feet in diameter
  • ·         The trees may reproduce by seed or by sprout
  • ·         Coastal redwoods grow taller than giant sequoias, but giant sequoias tend to be larger in girth and weight.
  • ·         With its combination of longitude, climate, and elevation the north coast of California provides the unique environment required for the coastal redwood to thrive.
  • ·         Only 4% of the redwoods’ original 2 million acres of historic range are left.

A similar tree, although a different species, is the giant sequoia (Sequoiadendron giganteum). Giant sequoias thrive in higher elevation habitats than giant redwoods and grow naturally only along the western slope of the Sierra Nevada Mountains, primarily between 5,000 and 7,000 feet in elevation.*

Burt Barnes, a professor emeritus at the U-M School of Natural Resources and Environment, gave the tree to Matthaei-Nichols in September 2013. Barnes, who died in 2014, received the tree from David Milarch, founder of the Archangel Ancient Tree Archive. Matthaei-Nichols plans to donate the tree to a botanical garden or organization that can plant it in the best conditions for it to thrive.

The sapling will be on display in the conservatory at Matthaei for several weeks. To learn more about the coastal redwood click here for an article from the National Park Service. If you've never traveled to California to visit the coastal redwoods or sequoias, this is an opportunity to see what a young tree looks like and imagine how large it might grow given enough time and the right conditions.

Source: Sequoia & Kings Canyon National Parks website.

Friday, October 2, 2015

U.S. Fish and Wildlife Service Proposes to List Eastern Massasauga Rattlesnake as Threatened Species

The U.S. Fish and Wildlife Service has just issued a press release about a proposal to list the eastern massasauga rattlesnake as a threatened species under the Endangered Species Act.

Click on the link below to read the release, which also contains information on how the public can weigh in on the proposal: