Update 1: It's a job AR! @ [Email? Protected] @. @ @ [Email? Protected] #. # $$$$$$$$ $.$
Update 2: And their living habits!
At present, biologists have id
Update 1: It's a job AR! @ [Email? Protected] @. @ @ [Email? Protected] #. # $$$$$$$$ $.$
Update 2: And their living habits!
At present, biologists have identified about 6.5438+0.4 million species of animals and plants, but the exact number of species in the world is still unknown, and it is estimated to be between 5 million and 3.
0 million. In addition, it is estimated that there is about 17 every year.
500 species are extinct, which is equivalent to one species disappearing from the earth every half hour! Endangered plant name: Aquilaria sinensis, also known as Aquilaria sinensis and Aquilaria sinensis, is on the verge of extinction. Reason: This kind of tree is much longer than the lowlands, and it is most common in the geomantic forest behind the village. But "Aquilaria sinensis" is a vulnerable variety because it is cut down at will in Chinese mainland. How humans protect them: Aquilaria sinensis mainly grows in southern China (including China and Hongkong). However, due to massive logging, the wild agarwood outside Hong Kong is scarce, and the trees of agarwood are also very rare. The Red List of IUCN Endangered Plants in 2000 listed Aquilaria sinensis as a vulnerable plant. As for its protection, Aquilaria sinensis is "an important source of medicinal materials", "only found in Jinghong (including Hainan Island) and Guangxi" (that is, endemic to China), "mainly found in semi-evergreen monsoon rain forest within 400 meters above sea level". When people collect medicinal resin, a large number of trees are cut down and destroyed, and habitat disappearance and habitat migration often occur (Oldfieldetal.
1998)。 In addition, all agarwood (Aquilari. ) is regulated by the Convention on International Trade in Endangered Species of Wild Fauna and Flora. . In China, Aquilaria sinensis has been listed in the national list of key protected wild plants (1999), which is a part of the government decree issued by the State Council. The China Plant Red Book pointed out that agarwood was severely damaged and the number of agarwood decreased sharply because people randomly collected resin for medicine, and it belongs to vulnerable species (edited by State Environmental Protection Bureau and Institute of Botany, Chinese Academy of Sciences, 1992). The Rare and Endangered Plants in Guangdong published in recent years (South China Institute of Botany, Guangdong Wildlife Protection Management Office, 2003) reported that the agarwood in Guangdong Province is very rare and endangered due to excessive logging. Because Aquilaria sinensis is protected by law in Chinese mainland, it is also regarded as a precious plant in Hong Kong, and it has been included in the book Rare Plants in China and Hong Kong (South China Institute of Botany, Agriculture, Fisheries and Conservation Department, 2003). The following is the information about "Aquilaria sinensis" for your reference: the present situation of China rare and endangered plant "Aquilaria sinensis" in Hongkong, China. Aquilaria sinensis, also known as Aquilaria sinensis and Aquilaria sinensis, has an aromatic resin. In China and Hongkong, agarwood was widely planted in the early days and then made into spices, which were sold to many provinces in China, Southeast Asia and even as far away as * * *. This place is famous for transporting and selling incense, so there is "China Hongkong" (the port for transporting spices) (Iu
1983; China Hongkong Herbarium
2003)。 In 2003, AFCD conducted a field survey of the local geomantic forest, with a total of 1 16 sites, of which 84 sites found agarwood. This kind of tree is much longer than the lowlands, and it is most common in the geomantic forest behind the village. Aquilaria sinensis is a vulnerable species because it is arbitrarily cut down in Chinese mainland. Recently, illegal logging of agarwood has spread to Hong Kong, which is a matter of concern. Characteristic agarwood belongs to Daphne family and is an evergreen tree, ranging from 6 to 20 meters high, with smooth bark, light gray or dark gray (Figure 1) and white or light yellow wood, so it is also called "agarwood". Young branches are sparsely pilose, leaves alternate, leathery, obovate to elliptic, usually 5- 1 1 cm long, 2-4 cm wide, with 15-20 pairs of veins, which are not obvious and almost completely symmetrical, and grow horizontally. These are all useful characteristics for identifying Aquilaria sinensis in the field (Figure 2). The leaf top is short and sharp, the leaf base is wide and wedge-shaped, and the leaf margin is complete and smooth. Flowers are yellow-green, fragrant and arranged in terminal or axillary umbels. Capsule is woody, obovate, 2.5 to 3 cm long and covered with short gray hairs (Figure 3). When it matures, it splits into two flat shells. When the fruit breaks, a silk thread will grow at the bottom, and one or two seeds will hang in the air, which is very similar to the situation that the caterpillar spins silk and hangs itself on the branch (Figure 4). Whether this feature has biological significance remains to be studied. Aquilaria sinensis is a precious aromatic wood, which can be used to make spices and medicines. In the past, it was used to make thread incense and spices, but this industry has declined in Hong Kong. The resin of Aquilaria Resinatum can be made into precious Chinese medicine "Aquilaria Resinatum" for treatment. According to the records of traditional Chinese medicine, there are two ways to extract aloes resin in large quantities. One is to invade the trunk with natural fungi, and the other is to cut the bark (5 cm deep). The resin of the same tree can be accumulated by cutting the bark 3 to 4 cm deep, and collected after several years. If the wood block is heated or burned to make the resin become liquid and seep out, a small amount of resin can be collected. If a part of the trunk or branch has resin and gives off fragrance, it will be sold under the name of "Daphne". The reason why agarwood produces resin may be the reaction of fungal invasion or broken trunk. Resin-rich fragrant trees are generally more than 20 years old. Although not every tree is invaded by fungi, due to the increasing demand, people in some areas cut down trees at will to find trees with fungi. Good quality agarwood is mostly taken from Aquilaria sinensis, which is similar to Aquilaria sinensis. China once imported this product from tropical Asia, but today, the supply has been greatly reduced. Because the resin of agarwood has become a substitute for agarwood, agarwood has also been cut down in large quantities. Herbarium/Herbarium/Special Topics/Aquilaria sinensis/Aquilaria sinensis _ C 2010-04-2221:210 Supplement: As mentioned above, Aquilaria sinensis is common in lowlands in China, especially in the fengshui forest behind the countryside. Although Aquilaria sinensis is not widely planted in Hong Kong at present, it has been widely planted in South China and Hong Kong and then made into incense, which may explain why there are still a large number of Aquilaria sinensis around the countryside today. Even though the history of planting Aquilaria sinensis in Hong Kong is quite long, the local Aquilaria sinensis is within the geographical distribution range of this species and thrives in the wild, so it has become a native plant in Hong Kong (Iu
1983)。 2010-04-2221:218 supplement: it has been very rare to collect Daphne in mainland China and Hong Kong, but recently it was found that someone illegally cut agarwood in the suburbs of Hong Kong. On the whole, although these incidents did not seriously endanger the survival of Aquilaria sinensis in Hong Kong, those Aquilaria sinensis whose trunks were cut off may not be recovered (Figures 5 and 6). According to the Forest and Suburb Ordinance (Chapter 96), plants in forest areas and artificial forests on * * * land are protected. In case of violation, the maximum fine is 25.
000 yuan, and imprisonment for one year. 2010-04-2221:21:27 Supplement: Summary From the perspective of plant conservation in Hong Kong, there is not much agarwood left in other areas of China, so the agarwood in Hong Kong can be regarded as the only relatively complete population in China. In the past, the communities to which local agarwood belongs (lowland broad-leaved forest and fengshui forest) have always been deeply loved by villagers, and have been properly protected by local laws, including the Country Parks Ordinance (Chapter 208) and the Forest and Suburb Ordinance (Chapter 96). Recently, most of the illegal logging accidents of Aquilaria sinensis involve non-sustainable collection, which has a certain impact on Aquilaria sinensis in Hong Kong. It can be seen that the protection of this rare and endangered plant in China needs great attention. 2010-04-2221:24: 56 supplement: treelovers/index? Knomoretrees & Lang = # 3 2010-04-22 22:17:18 Supplement: The growth habit of "Aquilaria sinensis" is located near and south of the Tropic of Cancer, and it belongs to the tropical and subtropical monsoon climate with high temperature, rainy and humid, with an annual average temperature/. The average temperature in July is above 28℃, the extreme minimum temperature can be reduced to-1.8℃, the annual precipitation 1600-2400 mm, and the relative humidity is 80-88%. I like moist and loose latosol or mountain yellow soil with thick soil layer and much humus. Most of them are distributed in mountain rainforests or semi-evergreen monsoon forest. It is often mixed with Cyclobalanopsis glauca, Huang Tong, Olive and Catalpa. It is a weakly positive tree species, fashionable and shade-tolerant. The initial growth is slow, and it gradually increases after 10 years. The average annual height growth of 20-30-year-old plants can reach 90 cm, and the average DBH growth can reach 65438±0cm. Flowering in March-May, fruit ripening in September-65438+1October. 2010-04-22 22:17: 26 supplement: please refer to hudong/wiki/%E5% 9c% 9f% E6% B2% 89% E9% A6% 99 for the propagation method of "Aquilaria sinensis".
Reference: @ @ * * @
Tonyleung052, you!
You are both friends of the intelligentsia.
Abstain.
Phalaenopsis died out because it was picked in large quantities. Supplement: reduce picking. Supplement: Cactus is facing the problem of extinction, but not every species. It takes 20 to 90 days to germinate (just because of the variety), and it takes a long time to bear fruit (two years at the earliest). Moreover, people often cut down trees, which leads to plant death and affects the ecology. Desertification affects the growth of cactus. 2010-04-2221:23: 20 supplement: Nepenthes can cause a mountain fire in Tomb-Sweeping Day every day. As long as it causes a mountain fire, Nepenthes on the mountain will be born to die. Secondly, because many people don't know how to plant pitcher plants, they will die after buying them, and the number of pitcher plants is decreasing because of a large number of high-rise buildings. 2010-04-2221:26: 37 supplement: the greenhouse effect, acid rain, pollution and deforestation will all change the ecosystem. When these changes happen suddenly, biological individuals may not have enough time to adapt to the new environment. Therefore, the disappearance of habitat makes organisms on the verge of extinction, and human activities are the main factors. = Environmental Protection 2010-04-2221:33: 00 Supplement: According to the Convention on International Trade in Endangered Species of Wild Fauna and Flora, Nepenthes belongs to the protected listed plants in Appendix II. Although Nepenthes is not an endangered species, its trade may lead to extinction. Therefore, the convention stipulates that Nepenthes can be traded, but it must first obtain the permission of the convention. Legislative protection ... 2010-04-22 23: 20:15 supplement: the living habits of Phalaenopsis.
Between Caitlin and Guo Lan.
Namely temperature, humidity, sunlight, etc. Are all lower than Jia Delialan.
Shangguolan (reporting age, Su Xin). Poor disease resistance is the weakness of Phalaenopsis.
Easily infected by bacteria
Its leaf quality and taste are also very suitable for insects.
So take care of it a little more than other species. Always do a good job of disinfection and prevention.
Pay attention to ventilation
If kept fresh, these materials can be planted smoothly. 20 10-04-22 23:22:38 supplement: Chinese name: cactus life habit: the stem is multi-jointed, with many segments connected with each other, oval, flat and thick, with needle-like leaves, which can prevent water evaporation and animal trampling. Flowers sessile, yellow, with many perianth, many pistils and single stamens. Berries are inverted oval, red when ripe, edible and contain most seeds. 20 10-04-22 23:26:37 supplement: Nepenthes living habits. knowledge. yahoo/question/question? qid=7006 120304052