The Civilian Conservation Corps (CCC) dismantled and relocated the historic Gregory House from its original location at Ocheesee Landing across the Apalachicola River to the east bank.
The high bluffs overlooking the mighty river provide one of north Florida’s most scenic landscapes.
The Gregory House is now home to the visitor center at Torreya State Park.
The Florida Torreya, Torreya taxifolia, is in grave danger of disappearing from the wild. Its range has shrunk to three counties on the Florida-Georgia border northwest of Tallahassee. Given this last opportunity to learn about the natural biome of a rare and beautiful conifer, a team of biologists will assemble at Torreya State Park on March 1-2, 2018. Experts will sample and survey the ecosystem associated with T. taxifolia from soil microbiology to flora and fauna, and brainstorm a plan to help save this beautiful tree for future generations to enjoy.
More information concerning the event is available here…
Today Dr. Hulcr, Dr. Smith and Dr. Carton de Grammont are at the Forest Biology Research Cooperative annual meeting talking about Forest Health and the role that ProForest plays in furthering collaborative research, extension and education.
The meeting is at the beautiful Austin Cary Memorial Forest. Just a reminder of how a #health #managed #forest looks!
It was a cold and rainy north central Florida December day, but that didn’t slow down restoration planting of redbay seedlings at a protected site near Gainesville, FL. Strains of redbay that have displayed resistance to the laurel wilt pathogen were planted in the cool wet weather. They will be studied in the effort to save Persea borbonia populations across the southeast by reintroducing tolerant germplasm.
Biologists from the Florida Park Service and US FWS, conservation researchers from the Atlanta Botanical Gardens, local volunteers and the UF/SFRC Forest Pathology lab gathered in the panhandle of Florida on steep ravines near the Apalachicola River to survey pockets of the wild population of Torreya taxifolia. Most of the previously mapped trees were found surviving and a new recruitment seedling was reported! However damage from deer browse was also noted, and surviving trees could not be described as thriving for the most part. It was a beautiful day to explore the habitat of this relict conifer, and to give thanks that we can play a role in learning about its place in the natural history of this area.
Laurel wilt is an extraordinarily destructive exotic tree disease in the southeastern United States that involves new-encounter hosts in the Lauraceae, an introduced vector (Xyleborus glabratus) and pathogen symbiont (Raffaelea lauricola). USDA Forest Service Forest Inventory and Analysis data were used to estimate that over 300 million trees of redbay (Persea borbonia sensu lato) have succumbed to the disease since the early 2000s (ca 1/3 of the pre-invasion population). In addition, numerous native shrub and tree species in the family are susceptible and threatened in the Western Hemisphere. Genetic markers were used to test the hypothesis that the vector and pathogen entered North America as a single introduction. With a portion of the cytochrome oxidase I gene, a single X. glabratus haplotype was detected in the USA. Similarly, Amplified Fragment Length Polymorphisms indicated that 95% (54 of 57) of the isolates of R. lauricola that were examined were of a single clonal genotype; only minor variation was detected in three polymorphic isolates. Similar levels of disease developed after swamp bay (P. palustris) was inoculated with each of the four genotypes of R. lauricola. It is proposed that a single founding event is responsible for the laurel wilt epidemic in the United States.
Today Jason Smith will be speaking at Purdue Forestry and Natural Resources graduate seminar today about the current state and future impacts of Laurel Wilt Disease.
Please join us for a seminar on Tuesday, October 31, at 12:30, by Gildas Gateble, from Institut Agronomique neo-Caledonien. The title of his talk will be: “An overview of New Caledonia’s plant biodiversity: Origins, characteristics, and threats, with a focus on the genus Oxera” . The seminar is co-sponsored by the UF School of Forest Resources and Conservation and the UF Biodiversity Institute.
Native Lauraceae (e.g. sassafras, redbay) in the southeastern USA are being severely impacted by laurel wilt disease, which is caused by the pathogen Raffaelea lauricola T. C. Harr., Fraedrich and Aghayeva, and its symbiotic vector, the redbay ambrosia beetle (Xyleborus glabratus Eichhoff). Cold temperatures are currently the only viable limitation to the establishment of X. glabratus in northern populations of sassafras…