After dinner the next morning, Fang Ye held a meeting with the civilian staff to discuss the design of other exhibition boxes. He was really a little busy with so many exhibition boxes. There were too many materials to find.


    Civilian personnel have collected a lot of information for some time, which is useful at this time, including the original habitat, suitable temperature and food of various animals, and put forward their own ideas and opinions.


    In addition to the general exhibition box, there are some exhibition areas with larger space in the amphibious and crawling hall, with an area of 20-50 square meters!


    At present, two are prepared, one for Zhuyeqing and the other for Chinese giant salamander.


    Both belong to amphibians and reptiles with great reputation and characteristics in China. Of course, there should be some arrangement in their exhibition area. Although the size of bamboo leaf green is small, it is not a waste to use a large exhibition area.


    Chinese giant salamander is commonly known as giant salamander. Although it is called fish, it is not a fish, but the largest amphibian in existence. The largest body length can reach two meters. It is one of China''s national treasures.


    The earliest fossil found is 165 million years ago. It can be said to be a living fossil of the animal kingdom! The giant panda, also known as a living fossil, has a history of only 8 million years.


    Compared with ordinary frogs and toads, giant salamanders are much more picky about their living environment. In nature, all habitats where giant salamanders haunt are dense mountain forests with vegetation coverage of 80% - 90%. There must be plenty of water around. There must be mountain streams and streams. Giant salamanders need wet skin to help them breathe. The dense jungle can not only block the sun, but also create an air environment with high humidity, Avoid suffocation due to dry skin.


    Even if the adult giant salamander has the ability to climb the land, it only dares to move on the land next to the stream. Therefore, the mountain stream and running water are the necessary conditions for the survival of the amphibian giant salamander!


    In addition, the water temperature of 16-28 degrees is the most comfortable for the giant salamander. When the water temperature is lower than 4 degrees or higher than 33 degrees, the food intake of the giant salamander will decrease, the action tends to be slow and the growth will be slow.


    The giant salamander is also very particular about the geology and landform of its habitat. It likes to inhabit in limestone areas. Under the long-term erosion of the river, many natural karst caves, underground rivers and caves with backwater will be produced in these areas. Adult giant salamanders generally live alone, but once they identify a cave, they will not move easily.


    These caves have not only become the best refuge for giant salamanders, where they take refuge from light and natural enemies, but also the back garden for their hatching offspring. It is precisely because of this specific hidden breeding place that giant salamanders have been handed down from generation to generation for hundreds of millions of years.


    Moreover, the giant salamander also has high requirements for water quality. It is not too much to say that it has a habit of cleanliness. The water suitable for life must be clear and clean, rich in minerals, and the water-soluble oxygen content cannot be less than 5 mg / L. in the stage of larval development and growth, the water oxygen content is even higher than 5.5 mg / L, which is close to the standard of human healthy drinking water.


    Dense forest, moist air, suitable temperature, hidden caves, flowing river water, clean water quality and rich food are basically indispensable for giant salamander.


    It is precisely because of the harsh requirements for the living environment that the giant salamander is also regarded as an environmental indicator, known as the "canary in coal". If you can see the giant salamander in the wild, it shows that the environment here is quite good and can basically be called a paradise.


    However, with the increase of human activities and environmental pollution, the number of wild populations has decreased sharply and is in extreme danger. It is listed as a national second-class protected wild animal.


    With the breakthrough of Chinese giant salamander artificial breeding technology, giant salamanders have even been moved to the table, and many protected areas have also purchased young giant salamanders from giant salamander farms for release.


    It seems that the protection situation of the giant salamander is very good. In fact, a study on the giant salamander in recent years shows that the Chinese giant salamander population contains at least five different evolutionary branches, that is, five different subspecies. Disorderly introduction, breeding and reintroduction have greatly damaged the genetic diversity of the giant salamander, and the wild giant salamander may be disappearing silently.


    Another typical example of the harm of gene pollution is the hybridization between Domestic Yak and wild yak. The gene pollution brought by hybridization will reduce the size of wild yak, lose some adaptive characteristics of cold tolerance and low oxygen content in the plateau, and reduce the survival range that can be selected, which will bring a series of effects.


    Therefore, the exhibition of giant salamander is not only to show this ancient living fossil, but also has high protection and education value. It is very alarming to see the crisis faced by giant salamander.


    First, as an environmental indicator, giant salamanders are highly sensitive to climate change and environmental pollution that can lead to species extinction. If they go first, other species will gradually follow suit.


    Another can introduce the exhibition board about gene pollution to tell tourists the harm of gene pollution and not to release it at will! We must release the animals with scientific guidance, otherwise we are not doing good, but doing evil.


    The popular science exhibition board in the raccoon exhibition area described the species invasion caused by release, and the combination of the two phases is better.


    To design the exhibition environment for the giant salamander, it is natural to imitate the mountain streams, waterfalls and pools in the wild.


    The exhibition area of giant salamander is a long and narrow side, with a width of 2.5 meters and a length of 12 meters. A curved stream is arranged inside. The shallowest part of the stream is 20-30 cm, and the deepest pool is one meter deep.


    The bottom of the stream is covered with a layer of small pebbles, and the top is covered with some large pebbles. It seems that the edges and corners of the stones have been erased by the erosion of the stream over the years, one by one round and smooth.


    The water circulation system is installed to maintain the purification of the water body. The cold water system simulates the natural water temperature and is controlled at about 18 degrees. The sprinkler, fog making and lighting systems simulate natural rainfall, morning fog and so on.


    The stream is the tourist''s side, so that visitors can watch the water section below the water level closely. The giant salamander moves in the extremely clear and transparent water, and some medaka will be placed in the water.


    Medaka is a small silver translucent fish. It is also sensitive to water quality changes. It likes clear water. As a neighbor of giant salamander.


    Opposite the exhibition area is the black wet river bank, with mountains and stones standing. Under a dripping rock wall, there is a dark cave concave into it, like a mysterious cave. It can be used as the residence of giant salamander.


    Acorus calamus, ferns, brown bamboo and moss, which grow slowly and have strong negative tolerance, are selected as plants in Hunan at an altitude of about 700-1200m. Some are scattered on the rock wall, and then several sunken trees are placed on the river bank.


    The trickling water drips down the rock wall, slow and urgent. Some fall directly into the water, some hit the green leaves of ferns, and the brown bamboo casts a mottled shadow in the water. The giant salamander and medaka swim and play in the extremely clear water. In such an environment, they will certainly live a very comfortable life.