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Chapter 623 Ecological Issues

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    In terms of ecological system research, Chen Xin can't help much. After all, this is not his area of ??expertise.

    But he is quite good at biological cultivation.

    After all, when breeding large cold-resistant wolf dogs before, Chen Xin personally presided over the entire project, and participated in the entire breeding process, including the training and actual use of the individual after they were bred. Chen Xin was involved in it, so he can be said to be rich in experience.

    It¡¯s just that the animals needed to build an ecological system are not large animals, or the demand for large animals is not that great.

    In naturally formed ecosystems and food chains, large animals usually reside at the top of the food chain, which is the last link in the closed loop of the entire ecosystem.

    It is also commonly known as the ecological niche of the wolf in the cycle of rabbits eating grass, wolves eating rabbits, the wolf dying and rotting in the ground, and grass growing again.

    This ecological niche is necessary in the natural cycle, because if rabbits have no natural enemies, they will reproduce without restriction and eventually exceed the limits that the environment can bear, leading to the collapse of the entire ecosystem.

    Kangaroo Nation has experienced this once, and even before the disaster, they were still deeply troubled by it.

    Back then, the Kangaroo Country unscrupulously massacred local native thylacines and other top-of-the-food-chain creatures. As a result, local rabbits, kangaroos and other creatures lost their natural enemies, and began to multiply in large numbers, destroying pastures, causing a sharp deterioration of the local ecology, and posing a threat to the country's livestock industry.  The industry suffered a heavy blow, and kangaroos became overrun.

    At that time, Kangaroo Country also tried some efforts, such as banning the hunting of thylacines and offering bounties on rabbits and kangaroos, but in the end they had little effect, and the country even needed to introduce wolves from abroad to curb the reproduction of rabbits.

    The reason is that they killed all the organisms at the top of the ecological niche, causing the entire biological chain to lose balance.

    But if it is placed in a small ecological environment like a dome city, the existence of such large predators does not seem to be too necessary.

    This is easy to understand. Such a small ecological environment has limited carrying capacity and cannot sustain the survival needs of large predators.

    This is why the old saying goes that there is no room for two tigers in one mountain. Large predators in the wild will have their own territory, and they will expel other large predators from their territory to ensure that they can obtain enough food.

    However, a small ecological environment like a dome city can still host some small herbivorous or omnivorous animals. Large predators such as wolves and tigers are really unnecessary and may also threaten the safety of residents in the city.  .

    As for smaller predators such as cats and dogs, they are also not suitable for the dome city, but the reason why they are not suitable is due to breeding issues.

    If you are someone who has a little understanding of the ecosystem, you will know that in the ecological niche, the organisms at the top of the food chain are rarer in number and more difficult to reproduce.

    Top predators such as tigers and lions can breed three to four cubs in one litter, which is a very high yield. Usually there are only one or two cubs, and they only breed once a year, so the population is very large.  Difficult to expand.

    As for small and medium-sized predators such as cats and dogs, their reproductive capabilities are relatively stronger, and it is common to have three or four children in one litter.

    If it is a smaller animal, their reproduction number will be even greater. A litter of more than a dozen like mice is not considered fertile among small creatures.

    The smaller the body size, the more it can only rely on quantity to ensure the continuation of the population.

    This is not a restriction imposed by the rules of the world in a novel, but an inevitable consequence of biological evolution and ecological evolution.

    And the most important thing is that if the dome city wants to maintain the self-sustainability, operation and balance of the ecological system, it needs more tiny creatures such as earthworms that we can¡¯t usually see, rather than cats and dogs.  They are all considered big guys.

    "What if you want to raise cats and dogs?" During lunch, listening to Chen Xin talking about these issues, Mo Qingyan asked Chen Xin with great concern.

    She has always wanted to raise a cat, a cute kitten, which is completely different from Qin Lan who wants to raise a dog and train it into a police dog.

    "It depends on how you want to keep them. If you just keep them at home as pets, it's not a big problem. Just make sure that the cats and dogs have enough food, are neutered and neutered, and don't let the cats and dogs run around. Just like raising them before  They are almost like pets and will not cause too much burden on the ecology." Chen Xin has really considered this issue seriously. As cats and dogs are one of the animals with the closest relationship to humans, there must be many people who want to keep cats and dogs.

     When a disaster strikes, it is very difficult to ensure people's survival. Pets such as cats and dogs are not considered at all. Therefore, in addition to private shelters that may also raise some pets or animals, official shelters  No one is allowed to bring pets in.

    Now that the situation is gradually improving and material supplies are guaranteed, there will definitely still be people like Mo Qingyan who want to keep pets to accompany them.

    In Chen Xin's view, this is not a big deal. Although some people will say that if no one has enough to eat, there will be nothing to feed pets, but in Chen Xin's view, as long as people who want to keep pets are willing to pay more  The labor and remuneration can afford the cost of raising a pet. This is not something that cannot be done.

    But after listening to his answer, Mo Qingyan had more ideas, so she asked him: "What will happen if the pet runs away and becomes a stray cat or dog?"

    "If that's the case, we can only kill them." There was a trace of cruelty in Chen Xin's words, but he still explained patiently: "The damage caused by stray cats and dogs to the ecology is very serious. Dogs are slightly better, there is nothing special about it."  Strong desire to hunt.

    But cats are animals full of hunting impulses at their core. They are also one of the few animals in the animal kingdom that hunt for fun. Even if a cat is sterilized and cannot reproduce, its existence will  poses a great threat to the local ecology.

    So if stray animals like cats and dogs appear in the wild in the dome city, they can only be hunted. After all, the ecology of the dome city is much more fragile than the natural ecology in the original urban environment. Once it is destroyed, it may cause  The collapse of the entire ecological environment.  "

    "Well, I can understand it. Stray cats and dogs themselves are a very harmful problem." Regarding Chen Xin's attitude on this issue, Mo Qingyan showed an understanding attitude, but her emotions were obviously still  Seems a little down.  (Remember the website address: www.hlnovel.com
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