Lead
"The Yangtze River saury is a matter of a net, and the construction of a gate at the mouth of the lake is a matter of a family."
This sentence fully illustrates the special features of Poyang Lake and the dilemma of Poyang Lake.
The so-called dilemma, on the one hand, the number of saury in the Yangtze River is increasing, and they are facing the problem of not being able to reproduce and grow naturally, and on the other hand, the saury fish in the Yangtze River will breed in Poyang Lake.
Therefore, the Yangtze River saury is a net thing, as long as the number of saury in Poyang Lake is missing, then the Yangtze River saury will decrease accordingly.
But in order for the saury to reproduce and grow naturally, should the sluice gates at the mouth of Poyang Lake be built?
This leads to another problem, that is, the construction of the gate at the mouth of Poyang Lake is a family matter.
Whether the sluice gates are built or not, they are likely to have a great impact on Poyang Lake and the Yangtze River.
So what will these effects be?
It is precisely because the whole society is particularly concerned about this issue, so everyone's opinions on this issue are also uneven, so how big is the hidden danger of building a gate at the mouth of Poyang Lake?
Poyang Lake, the world's three largest fishing grounds.
Many people are no strangers to Poyang Lake, a lake located in Jiangxi Province and a famous lake in the middle reaches of the Yangtze River.
Every summer, because the Yangtze River water is bound to arrive, the area of Poyang Lake will continue to grow, even larger than the area of the Yangtze River, which can be described as a major feature.
Therefore, Poyang Lake is also known as "the largest in the world".
In addition to its area, it is also quite rich in aquatic resources.
Although its area is only 1/6 of the Fairy Lake, the aquatic resources of Poyang Lake are the first in the world, and there are thousands of species, so the abundant aquatic resources have also made Poyang Lake one of the world's three major fishing grounds.
And its aquatic resources are not just a lot of fish species, the most famous of which is the Yangtze River saury, its spawning ground is Poyang Lake, and it is also one of the only spawning grounds in the world.
Therefore, the name Poyang Lake is also indistinguishable from the Yangtze River saury in everyone's impression.
So why did the Yangtze River saury choose Poyang Lake as its spawning ground?
Why don't they look elsewhere in the Yangtze River?
In fact, this is inextricably linked to the special geographical location of Poyang Lake, where there is abundant sediment from the Yangtze River.
Therefore, the close connection between Poyang Lake and the Yangtze River not only makes the water level of Poyang Lake very amazing, but also makes Poyang Lake very rich in aquatic resources.
There is also an important passage between the two, which is the main stream of the Yangtze River.
In April, the Yangtze River flows slowly into the northwest of Poyang Lake, and in November, the Yangtze River gradually weakens, which reduces the water level of Poyang Lake.
This seasonal cycle makes there is a good communication between Poyang Lake and the Yangtze River, so that the water quality of Poyang Lake is still clear, and not only that, but also the number of aquatic resources in Poyang Lake is increasing.
Therefore, the communication between Poyang Lake and the Yangtze River is also a blessing for the aquatic resources of Poyang Lake, which also allows the saury of Poyang Lake to spawn and reproduce here with peace of mind.
The instant fission of the Yangtze River saury is the price of the fishing ban.
In 2019, a nationwide ban on fishing in the Yangtze River was implemented, which means that the fish in the Yangtze River will be more protected, but it will also affect the ecological environment of Poyang Lake.
Because in 2019, all the fish in the Yangtze River came from Poyang Lake, and the number of saury in the Yangtze River was as many as billions, which made the aquatic resources of Poyang Lake even more precious.
This also means that people can no longer fish in Poyang Lake at will, once they catch too much, it will inevitably lead to a gradual decrease in the amount of aquatic resources in Poyang Lake, and people will no longer be able to eat saury.
This is also a kind of helplessness for the Yangtze swordfish, whose numbers are increasing, making it difficult for them to survive in the natural environment.
Some of the saury fish in Poyang Lake are four years old, some are five years old, but many more are three years old, and they are quite numerous, but it is difficult for them to survive in Poyang Lake.
Because during their breeding period, they need more and more space and food, and now they can only fight with other swordfish to survive.
In the end, only a small number of saury survived, which led to a gradual decline in the number of saury in Poyang Lake, so in 2019, fishing was banned in both the Yangtze River and Poyang Lake.
The implementation of this policy is naturally welcomed by everyone, but it will also face some long-term problems.
In fact, in Poyang Lake, this situation has already occurred in the early days, that is, after catching too many fish, the number of fish in Poyang Lake will gradually decrease, and even some species of fish have become endangered.
Some of these species of fish are unique to Poyang Lake, without which Poyang Lake would not be so famous and would not have such abundant aquatic resources.
Therefore, the restoration and protection of aquatic biological resources is also a very important thing.
It involves the appetite of human beings, as well as the living environment of other biological species and fish.
This is a long-term task that requires not only the support of the government, but also the concerted efforts of the whole society, so that we can protect a unique lake like Poyang Lake.
With the construction of sluice gates at the mouth of the lake, where will the fish resources go?
At a time when everyone was enthusiastic about the aquatic biological resources of Poyang Lake, an article titled "The Lake Mouth Builds a Gate, and the Yangtze River Saury Fish Goes Online with 100 Fish" plunged everyone into a tragic quarrel.
The author of this article, a fisherman with 30 years of experience in saury fishing, has seen with his own eyes that at the mouth of Poyang Lake, after the main stream of the Yangtze River, there are dozens of large net bags in almost every net, and the number of saury in each net bag is hundreds.
One of the main reasons why these saury fish are so large is that their spawning grounds have been reduced, and this phenomenon has only begun to appear in the last two years.
It is precisely because of this that there is a lot of discussion, some people think that the sluice gates should be built in the mouth of Poyang Lake as soon as possible, while others oppose it, arguing that the construction of sluices may affect the restoration of aquatic biological resources.
Therefore, on the question of whether to build a sluice gate in the mouth of the lake, everyone's opinions are also uneven.
So will the construction of sluices affect aquatic living resources?
In fact, this question is not a one-size-fits-all question.
In some cases, the construction of a sluice gate does have an impact on living aquatic resources, but in other cases it can only be constructed for protection.
Either way, there are multiple perspectives to consider.
If a sluice gate is built in the mouth of the lake, then the ecological environment and fish resources of Poyang Lake will bear the brunt of the project, and they will face severe tests because of this construction project.
This is because the communication channel between Poyang Lake and the Yangtze River will be closed, and Poyang Lake will also lose the opportunity to communicate with the Yangtze River, which is also a huge blow to fish.
Whether it is a knife fish or a carp, they need the water flow of the Yangtze River to be able to shuttle back and forth freely, and to be able to successfully complete the process of reproduction.
In addition, the other biodiversity of Poyang Lake is also inseparable from the communication with the Yangtze River.
Therefore, once the mouth of the lake is closed, it is likely that the fish stocks in Poyang Lake will gradually decline, and even some types of fish will be endangered.
This is also an irreversible loss to the ecological environment of Poyang Lake.
However, if a sluice gate is not built in the mouth of the lake, the number of saury in Poyang Lake will be staggering.
Their numbers will increase, which is also a threat to other fish and aquatic resources in Poyang Lake.
Long-term overfishing will also lead to a gradual decline in the number of other fish species in Poyang Lake.
This will also have a certain impact on the ecological environment of Poyang Lake.
Therefore, when considering whether to build a sluice gate at the mouth of the lake, it should be considered comprehensively and weigh the pros and cons.
Some people may think that if the number of saury in Poyang Lake is too large, then as long as people stop overfishing, their numbers will slowly decrease over time.
But this is not realistic, because in Poyang Lake, the saury is a predatory fish that needs more and more food to meet the needs of breeding.
epilogue
Whether it is the issue of building a sluice gate at the mouth of the lake or the issue of the Yangtze River fishing ban policy, we should consider it from the perspective of the overall ecological environment.
Only in this way will we be able to find a solution that will not only protect the ecological balance of Poyang Lake, but also protect the sustainable use of aquatic living resources.