Chapter 625

In a city with a dome, insects are flying all over the sky. They are constantly gnawing at the leaves of the plants, making the original environment full of vitality become broken and desolate.

A large number of insects are rampant, and even other animals are unable to withstand such a terrible disaster. The streets are full of dead animals, and their bodies are also eaten by insects, and even become a hotbed for hatching new insects.

"Failed again!" Chen Xin, who saw this scene, could not help sighing, and the researchers who saw this scene with him became very depressed.

"It's really hard to build a stable ecosystem artificially!" A researcher could not help but abandon himself and almost lost the confidence to continue.

This is the 17th time that they failed. Although this time the whole ecosystem persisted longer than any previous test, the whole ecosystem collapsed because of the gradual death of birds and the almost exponential reproduction of insects.

Before that, the 16 attempts they made also ended in failure.

For the first time, because the species of plants were not well controlled, insects produced toxins after eating the leaves of plants, poisoned birds and their corpses, and then indirectly poisoned other animals, resulting in the collapse of the whole ecosystem.

The second time, although we noticed the problem of plant species, the number of birds in the city was unbalanced due to the hunting of pet cats. In the end, you still led to a flood of insects and the collapse of the whole ecosystem.

The third is a surge in the number of birds, eating up all the insects; The fourth time, the predatory birds were put in to maintain the balance. As a result, the common birds were killed because of the territory problem; For the fifth time

Looking at the experimental records, Chen Xinfan did not want to recall how he had failed before.

In all the 17 experiments, they only insisted on the shortest ecosystem for seven months, and the longest one was this one. Although it lasted for 10 years, it finally collapsed.

"What's the problem? We have fully considered the demand and output of all animals in the whole food chain. Why do we still collapse? " A researcher is unwilling to question, as if he is questioning other people, as well as himself.

Facing this problem, Chen Xin sighed helplessly: "the ecological balance itself is very fragile. Any variable can easily break the original balance. It takes a long time for nature to form a stable coexistence relationship to form a stable structure.

The idea that we are now trying to artificially bring together several organisms to build a balanced and stable ecosystem is really idealistic. "

Although Chen Xin doesn't think this is impossible, after so many failures, even he has to admit that a truly stable ecological environment is far from being formed by adding several kinds of organisms.

Perhaps there is a natural enemy relationship between the two species, but the effect of population number, environmental carrying capacity and other environmental factors often leads to the result is not as ideal as expected, and the difference between the theoretical result and the actual result may be just a little variable, which will lead to the difference between the two.

"Are we thinking the wrong way?" Although seventeen consecutive failures frustrated everyone, some researchers still put forward new ideas: "in our previous experiments, animals were put in at one time. As a result, due to the different reproduction speed, the development speed between populations was different. As a result, a balanced ecosystem could not be formed, and the ecosystem soon collapsed every time.

This time, we tried to propagate the species to a certain scale, and then put them in batches. The whole ecosystem collapsed in ten years, which lasted longer than every time before. So should we adjust our thinking? "

"It's reasonable for you to say that ecological balance should be a kind of dynamic balance. There should be some flexibility in the number of different populations, so that the whole ecosystem has a certain fault tolerance rate and automatic correction function. Maybe we should really change our thinking." Chen Xin listened to the researcher's words and nodded in agreement.

Their previous experiments mainly relied on Professor Li's successful experience in studying the ecological agriculture system, combining several coexisting animals and plants according to the consumption and supply relationship in the food chain, in order to build a balanced ecological system.

But it is clear that the ecosystem is not simply composed of several species.

In particular, the changes of environmental factors will affect the ecology of species, and there is a relationship of mutual influence between different species.

In this case, there are quite a few variables that affect the final ecological balance. Although Chen Xin can simulate the impact of various environmental variables here, he can't calculate a correct answer.

In other words, there are correct answers, but the conditions they provide are not enough to calculate the optimal solution.

In the face of such a situation and seventeen consecutive experimental failures, it is also a good choice to change ideas.

"It seems that we have overlooked another important factor." At this time, a researcher is trying to repeat the test just now. Just looking at the result, he suddenly found a blind spot.

Hearing what the researcher said, Chen Xin looked at him curiously: "what did you find?"

"What we need to build is an urban ecosystem, right? But so far, it seems that we have not taken the city as a variable into the whole ecosystem! And all we have been simulating is the ecology of animals and plants, not the existence of human beings. " The researcher spoke out about his findings.

"That's right, but we can't build a stable ecosystem without considering cities and human activities. If human activities and cities are added as influence variables, it will be more difficult to achieve a balance." Although other researchers agree with his findings, they do not agree with his ideas.

Chen Xin has some different views on this. He interrupted the debate between the two researchers and thought about it for a while. He said: "since we want to change our thinking, it is a way to add urban variables and human activities into the ecosystem as a reference. After all, this is the result we want. Now it is a better way to calculate, isn't it?

Moreover, what we should consider more than that is how to build this system first, so that it can run smoothly, instead of being destroyed for various reasons like now. "

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