Humans have wiped out two-thirds of the plants and animals in the world in 50 years. Do you know which plants have disappeared?

The research team led by the British White Literature Ecology and Water Research Center published a report on the survey of wildlife on the British Island in the recently published Science magazine. The report said that in the past 40 years, the species of native birds in Britain have decreased by 54%, the species of native wild plants have decreased by 28%, and the species of native butterflies have decreased by an astonishing 765,438+0%. Insects, which have always been considered to have a large number of species and strong adaptability, are also facing extinction. Scientists infer that the earth is facing the sixth mass extinction. Dr. Jiang Zhigang, chief researcher of Institute of Zoology, Chinese Academy of Sciences and executive deputy director of China Endangered Species Science Committee, also believes that from the perspective of nature conservation biology, since the industrial revolution, the earth has entered the sixth extinction period. List of Endangered Plants in China Due to the lack of forest resources and the destruction of wildlife habitats, many rare animals and plants in China are in an endangered state. According to preliminary statistics, endangered animal and plant species in China account for 15% to 20% of the total. According to the person in charge of the State Forestry Administration, nearly 200 endemic species have disappeared in China, and some of them are on the verge of extinction. For example, Hainan black-crowned gibbon and Hainan black bear are greatly reduced, and rare plants such as Wangtianshu and borneol are on the verge of extinction; Wild animals such as elephants, peacocks and pheasants have been greatly reduced, and more than 20 rare animals such as elk, wild horses and Xinjiang tigers have been or are basically extinct. According to preliminary statistics, there are more than 300 species of terrestrial vertebrates in China, about 4 10 species and 3 species of wild plants 13 species. Alsophila spinulosa ranks first among 8 protected plants in China. New Zealand is one of the producing areas of spinulosa. It is also the national flower of New Zealand. The situation is getting more and more dangerous. The main taxonomic characteristics of this species of Alsophila spinulosa with slow sporophyte growth are scales at the base of petiole, air sacs on leaf axis, spore number and capsule membrane of sporangium, etc. There are about 230 species of Alsophila spinulosa in China, and there are 2 varieties of 1 1 species in China, which are divided into Alsophila and Alsophila. The reproductive cycle is long, and spore germination, gametophyte development and gamete mating all need a mild and humid environment. Abies Pinaceae was listed as one of the most endangered 12 species in the world by the International Committee for the Protection of Species in 1987. At present, there are only five trees in the natural distribution area, one weak and the other poor. Abies baishanzu, one of the most endangered plants in the world, belongs to the genus Aceraceae. It was first discovered by Zhong Putuo, a famous Chinese plant taxonomist, in Putuo Mountain in May 1930, and then by Professor Zhong Guanguang, a famous Chinese plant taxonomist, in Putuo Mountain in May 1930, by Professor Zheng, a forester. It is said that this kind of tree was not uncommon on Mount Putuo before 1950s. Unfortunately, it gradually died, leaving only this one. The remains of this "precious tree" are about 14 meters high and 60 cm in diameter at breast height. Its bark is gray, its leaves are dark green and its crown is slightly flat. Despite the vicissitudes of life, it is still flourishing and beautiful, adding luster to Putuo Mountain. Carpinus putuo belongs to Carpinus from betulaceae in botany. There are about 40 species in the world and 22 species in China. Widely distributed, North China, Northwest China, Central China, East China and Southwest China all have their footprints. Some kinds of wood are hard and dense, and can be used to make furniture, gadgets and farm tools. Some species are famous garden ornamental plants with beautiful leaves, strange fruit ears and dense branches and leaves. Deciduous tree of Acer in Aceraceae, height 15m. Only distributed in the narrow area of West Tianmu Mountain in Zhejiang Province, only two strains were found in the outer bend of West Tianmu Mountain, and their growth declined. The sterility rate of seeds is high, and the natural regeneration ability is weak. Has been in danger of extinction. Gleditsia sinensis, an endangered leguminous plant. Deciduous trees, 15-20m high. There used to be five ancient trees in Hunan, but now there are only two left. The natural regeneration ability is very weak, and the seedling rate of artificially propagated seeds is low. Acer cornutum is only distributed in a narrow area of West Tianmu Mountain in Zhejiang Province, and its growth has declined. This plant is in danger of extinction because of its high sterility rate and weak natural regeneration ability, and is listed as a national second-class protected plant. The stems of Alsophila spinulosa of Alsophilaceae are generally 10-20cm in diameter and 1-m in height, and some of them can reach more than 10m. At present, Alsophila spinulosa is only distributed in Guizhou, Sichuan, Guangdong and other places in China, and it is a rare and endangered first-class protected plant in China. When it comes to the endangered situation of plant species, it is nothing more than the crisis of Gleditsia sinensis. According to the investigation, there are 5 ancient trees of this species in Nanyue, Hunan Province, and only 2 are left. This kind of tree has dense wood, pods can be used as detergents, and plants have ornamental value in gardens. This species is the original species of Leguminosae, which is of great significance to the study of classification system. In view of the above, this species has been designated as a national first-class protected plant. Gleditsia sinensis is a deciduous tree with a height of 15-20m. Strong branches and thorns grow on the trunk and branches. Leaves are often clustered at the top of branches, with even pinnate compound leaves and leaflets 10- 16. The leaflets are ovoid, 2-6.5 cm long and 1-2.5 cm wide, and the leaflets gradually change near the base. ; ? It's called bathing. Why don't you take a shower? Find γ? Phantom? ] Hey? A certain one? P who? -10, the ovary is densely hairy. After flowering, the pod is elongated, 15-40 cm long, irregularly twisted and densely villous. The seeds are flat, oval, 8- 10 mm long, brown and shiny. This species is only found in valleys and streams near Guangji Temple in Nanyue, Hunan. We should strictly protect the remaining ancient trees and actively carry out research on propagation and introduction. Changsha has been cultivated. This photo is an introduced plant from Huxian Factory in Shenzhen. It seems that this species has a wide adaptability. Knee stalk is a tropical tree species discovered in recent years. There is only one big tree, which rarely blooms and bears fruit, and there are no small trees under the forest. It is urgent to take protective measures to avoid extinction. ? Morphological characteristics are semi-evergreen trees, with a height of13m and a DBH of 60cm; Bark yellow-brown, with developed roots; Branchlets stout; Buds are conical, with 2-3 bud scales, triangular, and 5-8 mm long. Leaves thin leathery, oblong or oblong-lanceolate, 9- 17 cm long. Leaves thin leathery, oblong or oblong-lanceolate, 9- 17 long.