Conservation of biodiversity What is the IUCN Red List of Threatened Species?

There are two reasons for the extinction of species in nature, namely natural causes and man-made causes, of which man-made causes are dominant. If the environment in which a certain creature lives has changed dramatically and is no longer suitable for the survival of this creature, the phenomenon of extinction of this organism may occur, or the whole earth will be greatly changed due to some major event that has suffered a major impact, which may cause the extinction of most organisms on the earth, such as the extinction of the age of the dinosaurs, but this situation is relatively rare. Human activities are the main cause of biodiversity decline, and now that humanity has recognized the importance of protecting the centres of life, the IUCN Red List of Threatened Species has been established, which lists the endangered species on Earth and is updated as appropriate.

Ecosystems are made up of biotic and abiotic factors, all of which affect the stability of ecosystems. There are many different types of ecosystems on Earth, and the stability of these ecosystems varies considerably, from the greater the number of species in an ecosystem to the greater its stability, and the greater its ability to return to its original state if it is affected by the outside world. If biodiversity is destroyed, the stability of the ecosystem will be reduced and the resilience will be destroyed.

The earth is the largest ecosystem, and the extinction of any kind of organism will have an impact on the biodiversity of the earth, and eventually will also have an impact on the human beings living on the earth, so it is imperative to protect biodiversity. At present, many countries have also developed measures to protect biodiversity and continue to implement them.

For example, the establishment of a red list is one such measure, which helps to protect endangered organisms and makes them less likely to become extinct. At the same time, we should also increase publicity and education for people, so that people can realize the importance of protecting biodiversity, consciously regulate their own behavior, and do not arbitrarily do some behaviors that damage the ecological environment.

It is the most authoritative directory for the collection of endangered species, which was compiled in the 60s of the last century and covers a wide range of contents.

This red list is a list of all plants and animals that are about to become extinct every time in the world.

It refers to the species that are very low in number and are about to become extinct, and they must be protected well, and if they are seen, they must be turned in.

The IUCN Red List of Threatened Species divides species into seven levels of endangerment, from highest to lowest: extinct, extinct in the wild, critically endangered, endangered, vulnerable, near threatened, and least threatened. Critically endangered, endangered, and vulnerable species are collectively referred to as threatened species.

1. Extinction: If there is conclusive evidence that the last individual of a taxon has died, the taxon is considered extinct.

2. Extinction in the wild: If a taxa is known to live only in cultivation and captivity, or only as a naturalized population far from its past habitat, it is considered to be extinct in the wild.

3. Critically endangered: When the probability of a taxon's wild population facing imminent extinction is very high, that is, when it meets any of the critically endangered criteria, the taxon is listed as critically endangered.

4. Endangered: When a taxon does not meet the critically endangered criteria, but its wild population has a high probability of extinction in the near future, that is, it meets any of the criteria for endangerment, the taxon is listed as endangered.

5. Vulnerable: When a taxon does not meet the criteria of critically endangered or endangered, but in the future, the probability of extinction of its wild population is high, that is, it meets any of the criteria of vulnerability, the taxon is listed as vulnerable.

6. Low Risk: By assessing taxa that do not meet any of the critically endangered, endangered, or vulnerable levels. Taxa classified as low concern can be further sub-graded, i.e., protection-dependent, near-threatened and requiring concern.

7. Least concern: Among the existing species, it has been assessed but does not belong to any other classification. This group of species is less threatened and has a relatively safe conservation status. Many common species such as protogenites, night herons, raccoons, etc., fall into this category.

There are two ways to classify endangered animals: 1 Two-level method This is the standard for the classification of national key protected animals in China, which is formulated according to the comprehensive evaluation and demonstration of many factors such as the scientific value, economic value, number of resources, endangerment degree and whether it is unique to China. Level I:

It refers to rare or endangered wild animals that are unique to China. Category II: Wild animals with sparse exponential populations, narrow distribution areas, and threatens to be extinct.

2 Six-level method This is the classification method of threatened species by the International Union for Conservation of Nature (IUCN) in its famous "Red Book", and in recent years, it has also begun to be used in some of the "Red Books of Endangered Animals in China" published in China. Extermination: Refers to extinct in the wild, but there are still remnants of captive-bred or free-range animals, such as elk.

Extinct in China (EX): refers to the extinct state of the wild in China, and there are still wild ones abroad, such as the high-nosed antelope. Endangered (e):

Wild populations have been reduced to the point of extinction or extinction, and risk factors such as crested ibises and South China tigers continue. Vulnerable (v): Wild populations are declining significantly and are bound to fall if effective conservation measures are not taken"Endangered"or because of the proximity of a person"Endangered"level, which must be protected to ensure"Endangered"species of survival, such as golden cats, clouded leopards.

Rare (R): Since the classification was designated, there have been only a limited number of records of discoveries, such as the Groovetooth Flying Squirrel. Deficiencies (i):

The situation is not obvious, but there are indications that they may belong to or are suspected to be endangered or endangered, such as Przewalski's gazelle and pseudovampire bats.

1. Taiwan clouded leopard

Also known as the clouded leopard, lotus leaf leopard, and tortoiseshell leopard, it belongs to the cats endemic to Taiwan.

It is also the largest wildlife on the island of Taiwan.

One. The Taiwanese clouded leopard has a length of one meter, a tail length of one meter, and a weight of 16 to 23 kilograms. It is pale grayish-brown all over its body, and there are about 6 cloud-like dark markings on both sides of its body, which is why it is called a clouded leopard.

2. Dromedary

The body is about 3 meters long and more than 2 meters high, and it is named because it has a hump. It is slightly taller than the Bactrian camel, and its body is also thinner than that of the Bactrian camel, with longer and slender legs. The head is small, the neck is thick and long, curved like a gooseneck.

The body is tall and has brown body hair. The eyes are heavy eyelids, the nostrils can open and close, the limbs are slender, the hooves are as large as plates, and the toes and planters have thick skin, all of which are suitable for walking in sand.

3. Taiwan sika deer

It is an endemic subspecies of Taiwan, which was once widely distributed in the mountains of eastern Taiwan, inhabiting the edges of mixed coniferous and broad-leaved forests and mountainous steppe areas. They feed on grasses, leaves, shoots, bark, mosses, etc., and are most active at dusk and early morning.

4. Ring-tailed lemur

It's primates. Lemuridae, an animal of the genus Lemur. The head body length is about 30-45 cm, the tail length is 40-50 cm, and the weight is about 2 kg.

The head is small, the forehead is low, the ears are large, both ears have a lot of hair, the sides of the head are also long hairy, the snout is long and prominent, and the lower incisors are comb-shaped, making the whole face look like a fox, and it is named because of the markings of the tail band.

5. Greenland sleeping shark

It can reach a maximum of 7 meters and can be as long as a great white shark.

Comparable. Known for its slow motion, it lives farther north than any shark. They are close relatives of the Pacific sleeping shark.

dorsal fin 2, usually with one spine each; Anal fin disappears. There are 5 gill holes, located in front of the low pectoral fin base. Lateral ocular position.

Greenland sleeping shark meat contains a neurotoxin called trimethylamine oxide.

The above content is reference: Encyclopedia - IUCN Red List of Threatened Species.

Giraffes, tuna, sharks and other animals. As the Earth's environment becomes more and more hostile, these animals are gradually losing their habitat and the risk of extinction increases.

Wisent. Modo dragon has a very peculiar appearance. Baby gray dolphin. Rays, very cute. Albacore tuna, very domineering. Black and white rhinoceros, the number is very small.

IUCN Red List of Threatened Species (2018) document.

The IUCN Red List of Threatened Species (2018), which began in 1963, is the most comprehensive list of the conservation status of plant and animal species in the world, and is considered the most authoritative indicator of the state of biodiversity. The directory is compiled and maintained by the International Union for Conservation of Nature. The IUCN Red List is based on strict criteria to assess the risk of extinction of thousands of species and subspecies.

The guidelines are based on species and region, and are intended to reflect the urgency of conservation efforts to the public and policymakers, and to assist the international community in averting species extinction.