After eating early the next morning, Fang Ye had a meeting with the civilian staff to discuss the design of the other exhibition boxes, he was indeed a little busy with so many exhibition boxes, and there were too many materials to find.

The civilian staff had collected a lot of information in the previous period, which came in handy at this time, including the original habitat of various animals, suitable temperatures and food, and put forward their own ideas and opinions.

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

At present, there are two preparations, one for Zhu Yeqing, and the other for Chinese giant salamanders.

Both belong to China's well-known and distinctive amphibians and reptiles, and of course the exhibition area for them should have some rows. Although Zhu Yeqing's size is small, it is not a waste to use a large exhibition area.

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

The earliest fossils found are 165 million years old, making them living fossils of the animal kingdom! The giant panda, also known as a living fossil, is only 8 million years old.

Compared with the general frog toad, the giant salamander is much more picky about the living environment, in the natural world, where there is a giant salamander in the habitat, is a dense mountain forest with a vegetation coverage rate of up to 80%-90%, there must be sufficient water sources around the mountain streams, the giant salamander needs to rely on moist skin to assist breathing, and the dense jungle can not only block the sun, but also create a humid air environment to avoid it because of dry skin and suffocation.

Even if an adult giant salamander has the ability to climb onto land, it only dares to move on land close to a stream, so mountain streams and flowing water are essential conditions for the survival of amphibians like giant salamanders!

In addition, the water temperature of 16-28 degrees Celsius is the most comfortable for giant salamanders, and when the water temperature is lower than 4 degrees Celsius or higher than 33 degrees, the giant salamander's food intake will decrease, and its movement tends to be sluggish, and its growth will be slow.

The giant salamander is also very particular about the geology and topography of its habitat, it likes to inhabit limestone areas, under the long-term erosion of river water, these areas will produce many natural caves, dark rivers and caves with backflow water, adult giant salamanders generally live alone, once they identify a cave will not easily move.

These caves are not only the best refuge for giant salamanders, where they can rest from the light and predators, but also as the backyards where they hatch their offspring, and it is because of this specific hidden breeding place that the giant salamanders have been passed down from generation to generation for hundreds of millions of years.

And the giant salamander also has high requirements for water quality, it is not an exaggeration to say that there is a habit of cleanliness, the water quality suitable for life must be clear and clean and rich in minerals, the amount of dissolved oxygen in water can not be less than 5 mg per liter, and the oxygen content of water is even higher than 5.5 mg per liter in the stage of larval development and growth, which is close to the standard of healthy drinking water for human beings.

Dense forests, humid air, suitable temperatures, hidden caves, flowing rivers, clean water, and abundant food are all indispensable for giant salamanders.

Because of the strict requirements for the living environment, the giant salamander is also regarded as an environmental indicator organism, known as the "canary in the coal", and if you can see the giant salamander in the wild, it means that the environment here is quite good, and it can basically be called a paradise.

However, with the increase of human activities and environmental pollution, the wild population has declined sharply, and it is already critically endangered, and it is listed as a national second-class protected wild animal.

With the breakthrough of artificial giant salamander breeding technology in China, giant salamanders have even been brought to the table, and many conservation areas have purchased juvenile salamanders from giant salamander farms for release.

In fact, a study on giant salamanders in recent years has shown that the Chinese giant salamander population contains at least five different evolutionary clades, that is, five different subspecies, and the disorderly introduction, breeding and release of giant salamanders have greatly damaged the genetic diversity of giant salamanders, and wild giant salamanders may be silently extinct.

Another typical example of genetic contamination is the crossbreeding of domestic yak and wild yak, which will make the wild yak smaller in size, lose some of the adaptation characteristics to the plateau cold tolerance and low oxygen content, and reduce the survival range of the choice, which will bring a series of impacts.

Therefore, the giant salamander on display is not only to show this ancient living fossil, but also has a high conservation and educational value, and it is very alarming to see the crisis faced by the giant salamander.

First and foremost, giant salamanders are highly sensitive to climate change and environmental pollution that can lead to extinction, and if they go first, other species will follow.

Another one can introduce a sign about genetic contamination to tell visitors about the dangers of genetic contamination, and they can't be released at will! There must be scientific guidance for the release of animals, otherwise it is not for good, but for evil.

The popular science display board in the raccoon exhibition area in front of it introduced the invasive species caused by the release, and the combination of the two has a better effect.

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

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

The bottom of the stream is paved with a layer of small pebbles, and then some large pebbles are paved on top, and it is clear that the stream has been washed over the years, erasing the edges and corners of the stones, and they are 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 controls it at about 18 degrees, and the spray, fogging and lighting systems simulate the natural rainfall, morning fog and other weather.

The stream is on the tourist's side, so that visitors can get a close-up view of the water below the water level, and the giant salamanders move in the crystal clear water, and some medaka are placed in the water.

The medaka is a small, silvery translucent fish that is also sensitive to changes in water quality, preferring clear water, and is a neighbor of the giant salamander.

Opposite the exhibit is a black, wet stream bank with rocks towering, and under a dripping rock wall, there is a hollow black cave that can be used as a dwelling place for giant salamanders.

The slow-growing and negative-tolerant calamus, fern, palm bamboo and moss at an altitude of about 700-1200m above sea level in Hunan were selected as plants, and some were scattered and scattered, and then a few pieces of sunken wood were placed on the bank of the stream.

A trickle of water drip down the rock wall, sometimes slowly, sometimes urgently, some directly into the water, some hitting the emerald green leaves of ferns, palm bamboos casting mottled shadows in the water, giant salamanders and medaka swimming and playing in the crystal clear water, such an environment is bound to live very pleasantly.