Google Cloud Speech-to-Text API (Chirp) + Gemini 2.5 Flash Non-Thinking. Treat it as a searchable index of what was broadcast, not a quotation record.
00:01:02In autumn, walk into the valley of Pingnan County, Fujian Province
00:01:06, and you will definitely notice them
00:01:08.
00:01:10On the same hillside, most of the trees are still green.
00:01:14Only this Metasequoia, seen from a distance like
00:01:17fire, is tall and short , and stands out
00:01:21among the green mountains . What is more special
00:01:24than the colors is their rarity
00:01:27. Global wild Metasequoia
00:01:36is listed as critically endangered in the IUCN Red List of Threatened Species
00:01:40. level
00:01:42.
00:01:45And this ancient Metasequoia forest hidden in the Pingnan
00:01:49valley is actually the largest native
00:01:52Metasequoia community
00:01:54in the world.
00:02:04Walking into the valley, the soil underfoot began to become soft ,
00:02:08this
00:02:10approximately 4,000 square meter alpine wetland is the home
00:02:14of Pingnan Metasequoia
00:02:15.
00:02:20pn63,172. PN 53,172.5
00:02:24PN6,293
00:02:27. No. 65 is 22 meters high .
00:03:21This is the secret of Metasequoia's unique breathing roots, like
00:03:25a natural oxygen bar, allowing it to breathe freely
00:03:29in oxygen-deprived mud.
00:03:32In addition, the base of the Metasequoia trunk is swollen into a mound shape
00:03:35, like stone piers, firmly rooted in the soft
00:03:39wetland to resist water erosion. The tannin acid
00:03:43in the bark naturally reduces the risk of insect damage
00:03:47and microbial infection. The three insect mechanisms are interlinked,
00:03:51allowing Metasequoia to firmly root in the intertidal zone
00:03:54. It stands firm against tides, wind and rain
00:03:58.
00:04:02This amazing survival wisdom. Its long
00:04:05epic began about 100 million years ago in the Early Cretaceous
00:04:09period.
00:04:12At that time, Metasequoia was a large family distributed throughout the Northern Hemisphere
00:04:16, until about 2.5 million years ago, when the Quaternary glaciation
00:04:19arrived, and they successively became extinct
00:04:23in Europe, North America and other places
00:04:24.
00:04:27Scientific surveys confirm
00:04:31that there are still wild Metasequoia distributed, but the number is very small.
00:04:34The number of wild plants is less than 1,000 . Southern
00:04:38China is their most important survival sanctuary
00:04:41on Earth. As a survivor of ancient times
00:04:45, Metasequoia has witnessed Earth's geological, climatic
00:04:49changes, and biological evolution history , and is a true
00:04:53natural living fossil . However
00:04:56, its fate has not been so stable. Due
00:05:00to its poor natural renewal ability , coupled with severe insect damage
00:05:03and human activity interference, there are less than 300
00:05:07ancient Metasequoia trees over a hundred years old in the country. And this alpine wetland
00:05:11in Pingnan
00:05:40, in other parts of the world, Metasequoia is rarely seen scattered.
00:05:44Why is Pingnan the only sanctuary
00:05:47for this branch of life ?
00:05:51All this is due to the special protection of nature. The mountains
00:05:55surround a deep and secluded valley, like
00:05:58a natural barrier blocking cold currents, stabilizing the
00:06:02average annual temperature in the area at around 15 degrees Celsius
00:06:05. Groundwater continuously gushes out, moistening
00:06:09The altitude of 1200 meters
00:06:12also allows it to escape the heat
00:06:16in the steaming southern mountains. All possible survival conditions
00:06:20are met here, collectively creating this
00:06:23rare vitality. However, even in
00:06:27this blessed haven , Metasequoia still faces
00:06:31severe challenges. Although its vitality is tenacious,
00:06:35it is difficult to reproduce smoothly in the natural environment
00:06:38.
00:06:40The clues are hidden within.
00:06:52Protect the tree from freezing
00:06:55. But this also exposes its fragility
00:06:58and extreme sensitivity to the environment. The growth of
00:07:02Metasequoia, whether it is seeds, flowers, or seedlings , is very sensitive
00:07:06to environmental factors .
00:07:08And then or the temperature.
00:08:12Relying solely on natural reproduction, Metasequoia can hardly achieve population renewal
00:08:16. For this ancient forest to continue, someone must
00:08:20reach out .
00:08:23Artificial cultivation has become the key to continuing the population
00:08:26. These carefully collected cones and seeds will be
00:08:30sent to the state-owned forest farm's seedling base. After
00:08:34scientific cultivation, they will grow into healthy seedlings
00:08:37. Currently, we have collected
00:08:40nearly 200 copies
00:08:45of Metasequoia seed resources. There are 3,000 grafted seedlings, and the grafting survival rate is as high
00:08:49as 90%. At the same time, the first Metasequoia
00:08:53living gene bank in the country has been established. Artificial
00:08:57propagation has solved the problem of Metasequoia reproduction, and
00:09:00scientific monitoring and in-situ protection of wild ancient Metasequoia communities
00:09:04are also being promoted simultaneously
00:09:06.
00:09:10Tighten it a little.
00:10:11Someone is dedicated to protecting every fragile seed.