Скачать или смотреть FL Torreya in Highlands NC: 90 yrs de facto rewilding (2015)

"Assisted migration" for climate-endangered Florida Torreya inadvertently began 90 years ago, when botanist Thomas Grant Harbison planted this species of conifer tree on his mountainside land in Highlands, North Carolina. April 2015, Torreya Guardians document this gone-wild grove — likely, the best and oldest example of how this ancient native lineage grows beneath a deciduous canopy and how slowly it is dispersed by squirrels. Hence the need for human-assisted migration in this time of rapid climate shift.

Connie Barlow narrates with camera, while Jack Johnston explores, identifies, and measures the Torreya grove and the surrounding plants.

Table of contents (with hotlinked timecodes):

00:07 Introduction, setting, species history
00:49 video tour begins with seed shadow documentation
02:29 close look at 4 year old seedling
03:34 survey of overtopping trees
05:00 the 6 original specimens are measured
06:26 how the late Bob Zahner described the 6 trees
07:13 measuring continues on the 6 trees
07:54 view directly up from center of Torreya grove
08:07 interlude: photos of diseased specimens in Florida
08:22 return to video-documentation of Highlands grove
09:39 lower limbs extend far outward horizontally from trunks
10:02 basal sprouting examples (a normal Torreya habit)
10:32 forest floor beneath the Torreya grove
11:18 naturally recruited sapling near road (17-inch girth, 14-ft tall)
12:23 a nearby giant white oak, red maple, basswood, buckeye
14:05 Jack finds another small tree torreya 30 yards fr grove
15:01 Mayapple clone, trillium, American Holly
15:37 seed shadow vacant on northeast side of grove
16:13 20-foot-long horizontal, full-leaf branch rests on ground
16:56 Jack lists torreya's similarities/differences fr hemlock
17:47 no symptoms of disease
18:07 history of Thomas Grant Harbinson planting these trees
18:54 first example of low-hanging branch w female cone
19:07 speculations on history of grove access to sunlight
19:45 what Torreya seeds look like
20:01 continue video exploration of grove lower branches
20:51 tall, leafy basal sprout
21:12 Jack finds young male cones, prior to pollen dispersal
21:45 a low-hanging branch with a pair of young female cones
22:16 view of house and distant view of Torreya saplings
22:22 observing and measuring 14+ year old "seedling"
26:10 distant view of grove from the road
27:12 3 Recommendations for Action: confirm identity,
core youngest, seek institutional buyer for property

Note: Minimum temperature at this exact location in February 2015 was -12F. Biltmore Torreyas reported to have easily survived -18F in 1985. Cleveland OH Torreyas survived the coldest February on record in 2015: 10 days below zero F, dipping to -17F. Full and updated information on the Torreya trees at this site in Highlands are here: http://www.torreyaguardians.org/highl...

General information on Torreya taxifolia "rewilding" and on the overall topic of "assisted migration" of forest trees during this century of rapid climate change is available at http://www.torreyaguardians.org

Access a list of all the videos on Torreya trees posted on this youtube channel at: http://www.torreyaguardians.org/video...

Two WIKIPEDIA pages put the citizen efforts of Torreya Guardians in context of the overall need for "assisted migration" poleward of native trees:

"Assisted Migration of Forests in North America" - https://en.wikipedia.org/wiki/Assiste...

"Torreya Guardians" - https://en.wikipedia.org/wiki/Torreya...