Efforts to Save Torreya taxifolia
1. Torreya Guardians "Assisted Migration" program
This website was initiated to promote citizen-professional collaborations in behalf of the highly endangered Torreya taxifolia, specifically to propagate plants from privately available seed stock for eventual reintroduction of the species onto privately held lands in the eastern United States, northward of the Ice Age Pocket Reserve of the Apalachicola of northern Florida. This unusual initiative is motivated by at least four powerful goals:
To help save Torreya taxifolia from extinction.
To test the efficacy of assisted migration for this and other threatened plants that were "left behind" in their peak-glacial reserve.
To serve as a model for the kinds of geographic interventions that will be necessary for plants in a warming world.
To nurture citizen-professional collaborations and a high degree of volunteerism in the service of biodiversity.
2. U.S. Fish & Wildlife Service
In 2010, the USF&WS initiated an update for the original (1986) recovery plan for Torreya taxifolia as an endangered species. You can access in PDF the existing official USFWS plan (updated in 2010) for managing this endangered species. Do an internal word search in that document for "translocation" to see how it addresses the new issue of assisted migration. Search for "guardians" to see the places in which the plan begins to coordinate with the work of Torreya Guardians. Much more can be accessed about the 2010 review process (the agenda and some of the pro-assisted migration comments) at the Torreya taxifolia Recovery Plan page on this website.
NOTE: In May 2010 USF&WS staff overseeing the recovery plan under the Endangered Species Act for Torreya taxifolia gathered a meeting of researchers, managers, and landowners to review their actions to date and recommend future actions for an update of the recovery plan. Though not active within the terms of the management plan, Torreya Guardians was invited to participate, so Russell Regnery and Connie Barlow listened and shared their thoughts by phone call-in during the day-long conference. We felt welcome and well heard. Afterwards, Barlow decided to follow-up with print commments of her own (advocating a shift to a "deep-time perspective" of what constitutes native habitat) and to alert several scientists with expertise in this realm of the opportunity to send in comments as well. Two did so. These comments and more can be accessed on this website via Torreya taxifolia Recovery Plan Under the Endangered Species Act: Spring 2010 solicitation of comments on assisted migration. That page contains six links, including:
Comments by Connie Barlow
Comments by Prof Sarah Reichard
Comments by Josh Donlan (of Advanced Conservation Strategies).
3. Cuttings, Cloning, and Off-Site Propagation
This paper reports on the 1989 project to take cuttings from the remaining individuals alive in Florida. The full report is available on-line (above), "The Ex Situ Conservation of Stinking Cedar" by Bibiana Garcia Bailo, Ron Determann, Rob Nicholson, and Stephen Sojkowski. July 1998 issue of Public Garden: The Journal of the American Association of Botanical Gardens and Arboreta, Vol. 13, No. 3
[excerpt] "For this study, 2,622 cuttings were collected from 166 trees at 14 individual sites from throughout the native range of the species. Cuttings were taken in November 1989 and were transported to greenhouses in Massachusetts, where they were given a fungicide soak (Zyban) and subsequently propagated. Cuttings were potted and grown for two years and then shipped to botanic gardens and biological institutions worldwide for observation and research. Institutions receiving plants were the Arnold Arboretum of Harvard University; Bok Tower Gardens; Royal Botanic Garden, Edinburgh; Illinois Natural History Survey; Mercer Arboretum; North Carolina Botanic Garden; Tall Timbers Research Station; USDA Forest Service, Berkeley; and USDA Forest Service, Gulfport."
Rooted cuttings of original Florida genotype
have begun to produce seeds at the "potted orchard"
of T. tax at Atlanta Botanical Garden
For more on the results of this cloning project:
Smith College Torreya site
For detailed advice on:
propagating from seeds and cuttings of T. taxifolia
4. Return of Cloned Stock to Native Habitat
Report by the Georgia Plant Conservation Alliance: Click here for the main web page on efforts to conserve Torreya taxifolia posted by Georgia Plant Conservation Alliance.
FIRST TORREYAS LEAVE THE NEST, by Laura Anne Middlesteadt, Public Relations, Atlanta Botanical Garden
After six years of tender loving care at the Atlanta Botanical Garden, 19 individuals of Torreya taxifolia (stinking cedar) were planted out on DNR land in north Georgia last spring. Staff from ABG, the Georgia Department of Natural Resources, and Smithgall Woods participated in the planting. Conservation of Torreya has been one of GPCA's four priority projects since its inception in 1995.
The Atlanta Botanical Garden is one of several holding sites for genetic material of the species. ABG staff have nurtured and propagated more than 150 genetically different individuals of stinking cedar since 1990. The trees that were planted at Smithgall were the first of this group to be planted out. They represent 10 different genetic clones, all originally from Georgia. "This is a tree that faces almost certain extinction without some action on our part," Ron Determann, Atlanta Botanical Garden, said. "We're very pleased that some individuals are fruiting and setting seed now."
The location of the outplanting at the Smithgall Woods/Dukes Creek Conservation Area in White County is north of the species' natural distribution. Determann and DNR botanist Tom Patrick hope that the fungus which attacks the trees will not be present at the new site. The trees, which were three to four feet in height at planting, were sited in both open woods and full sun areas near the Smithgall Visitor Center on Georgia Highway 75 Alternate just south of Helen.
"The trees are doing really well," said Linda Moore, Smithgall grounds supervisor. "We haven't lost any and they've all put on new growth."
The Smithgall Woods/Dukes Creek Conservation Area is open to the public for recreational purposes. For more information, call 706-878-3087.
UPDATE ON THE RECOVERY OF TORREYA TAXIFOLIA, by Madeleine Groves, Conservation Programme Coordinator, Atlanta Botanical Garden
Long-term institutional cooperation and commitment by GPCA members and collaborators towards the recovery of Torreya taxifolia has been continually demonstrated since this project was reported in GPCA's first newsletter (No. 1, Jan. 1998). In November 1989, the Arnold Arboretum of Harvard University, through the Center for Plant Conservation (CPC), initiated ex situ conservation efforts as recommended in the recovery plan written for this species when it was listed as "endangered" under the US Endangered Species Act in 1984. Over 2,000 cuttings from 166 trees at 14 individual sites were collected in order to secure and propagate genetic material away from the infected populations (Nicholson et al., 1998).
ABOVE: Seedlings grown from seed produced from rooted cuttings of the original Florida genotypes have now been planted back in their native home; these seedlings are visible alongside the main parking lot at Torreya State Park.
The Torreya seedlings planted near the parking lot at Torreya State Park have grown over the course of several years. Notice the full-sun habitat. This photograph was taken in autumn 2007 by Glenn Rilke.
In 1990, The Atlanta Botanical Garden (ABG) entered into a corporate agreement with the CPC to receive a full set of these original cuttings. Plants from many of these cuttings are now over 5 feet in height. Despite reproductive individuals not being found in the wild as a result of the blight, ABG staff harvested the first crop of seed from these cuttings in Fall of 1998. Using a simple but effective method, the seeds were cleaned and planted at ABG in rodent-secure seed beds. You can access on this website a photo-essay of the propagation program at Atlanta Botanical Garden.
In order to reduce the risk, additional material (approximately 2,000 cuttings, representing 150 genotypes) was taken from ABG's original cuttings and forwarded to Rob Nicholson at The Botanic Garden at Smith College in Northampton, MA to be rooted. Rob's long-term commitment to conserving this species should be noted as he has been involved in this project since initial conservation efforts were made by the Arnold Arboretum. Approximately, 1,600 rooted cuttings were returned to ABG in December, 1998 where they were potted-up and labeled with their original Arnold Arboretum location numbers. ABG is now coordinating the distribution of these cuttings to other GPCA members including the State Botanical Garden, UGA Experimental Station (Blairsville, Georgia), Georgia Southern University, Callaway Gardens, and Smithgall Woods. The GPCA continues to rank this species as one of their top five priority projects for this state.
As GPCA members and collaborators continue to work closely on developing propagation and horticultural techniques for this species, securing ex situ conservation populations north of the infected populations will be one of GPCA's main objectives as we enter the 21st century.
Learn about efforts to REWILD Torreya taxifolia in the southern Appalachians and points north.
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Annotated List of Papers/Reports Online re Assisted Migration