Lead
"This year, the number of mandarin fish in the Yangtze River system is in an explosive state, and it is rumored on the Internet that many reservoirs in the upper reaches of the Yangtze River and the main tributaries of the Yangtze River are mandarin fish, and the leaves are all growing, and many of them weigh 3-4 catties."
Some time ago, such pictures began to circulate on the Internet, and the focus of these pictures is precisely mandarin fish, in which it can be seen that not only the leaves grow very large, but also like small gas canisters, which is not a good phenomenon.
The Yangtze River has always been the most important water system in the mainland, and it is also the economic lifeline of the mainland, and the ecological environment of the Yangtze River is the continuous improvement of the water access project in the future.
However, with the explosion of fish on the Yangtze River, what impact will this have on the ecological environment of the Yangtze River?
The reason for the surge in the number of mandarin fish in the Yangtze River.
Today's surge in the Yangtze mandarin fish population is due to the mainland's recent legislation on fishing bans and long-standing ecological protection.
The Yangtze River is the most important river in the mainland, its upstream is formed in the Qinghai-Tibet Plateau, after a distance of more than 7,000 kilometers to form the unique water ecological environment of the downstream, and the Yangtze River basin is not only the most important agricultural and animal husbandry zone in the mainland, but also the most populated area in the mainland, many cities are gathered in this famous river in China.
But the Yangtze River is not perfect, and the ecological changes that have been almost firmly recorded in the Yangtze River basin over the past millennia are now evident evidence of human interference.
In 1970, however, the fishing industry in the Yangtze River basin was under real threat, as hydropower stations in the upper reaches of the Yangtze River were completed and commissioned, leading to the construction of the Three Gorges Reservoir, the largest hydropower project in the upper reaches of the Yangtze River.
Completed in 1997, the Three Gorges Reservoir is an unprecedented reservoir that brings together water from eight tributaries of the upper reaches of the Yangtze River and is now the world's largest hydropower station with the largest storage capacity.
The mandarin fish of the Yangtze River is also a major biological endemism of the Yangtze River, the mandarin fish is known as the "lighthouse of the Yangtze River waters", the parent fish that spawns in the main stream of the Yangtze River, and is an important tributary of the upper reaches of the Yangtze River, and is known for its high fish rate, high spawning rate and high reproductive ability.
Therefore, the status of mandarin fish in the water system of the Yangtze River is also very important, but now after nearly 100 years of development, the biological framework of the Yangtze River in nature has changed beyond recognition, and the number of mandarin fish has also changed during this week.
In 1983, the number of mandarin fish in the main tributaries of the Yangtze River exceeded 1.1 billion, and after the completion of the Three Gorges Reservoir, the population of mandarin fish appeared in the Yangtze River in a biennial period, and in 1999 the number had reached 5.6 billion.
The blocking function of the Three Gorges Dam has had a huge impact on the healthy growth of mandarin fish, so the number of fish in the Yangtze River has gradually increased since 2000.
In 2004, according to the China Fishery Association, the Yangtze River Fishery Economic Research Center, the Fishery Resources Management Commission, the Fisheries Office of the State Council and the Institute of Agricultural Social and Economic Development jointly issued the "Notice on Announcing the Total Catch of Mandarin Fish in Xing'an and Reducing the Age Limit", and according to a series of subsequent developments, the number of mandarin fish in the Yangtze River has gradually become abundant.
But the large number of mandarin fish can also lead to some ecological problems, first of all, problems in the food chain, mandarin fish, also known as "mackerel", is a predatory fish, which feeds on algae, zooplankton and some other invertebrates, so once the predatory nature of mandarin fish surges, it will affect the living environment of other species.
This phenomenon in the food chain is called the "predator release effect", which is also studied in ecology, and essentially refers to the impact of a decrease in the number of predators on the food chain, which may be mainly due to the increase in the number of predators in the lower food chain and the decrease in the number of organisms in the upper food chain.
Problems caused by the explosion of mandarin fish populations.
The main reason for this is the lack of predator control at the top of the food chain.
In the case of an explosion in the number of mandarin fish in the Yangtze River, it may lead to a decrease in the number of predators in the upper part of the food chain, and an increase in the number of predators in the lower layer will undoubtedly lead to a decrease in the number of organisms in the upper food chain.
However, there are many fish in the Yangtze River, and this predator release effect will not only appear on the mandarin fish, but also on some large and vulnerable fish in the Yangtze River.
At the same time, the number of predatory fish is decreasing, which means that the number of fish with fewer predators will gradually increase, which may have a great impact on the ecological environment of the Yangtze River.
At present, the number of mandarin fish has not been out of control, but from the current situation, its number has surged, coupled with the uncontrolled development of human fishing, may lead to an increase in the number of mandarin fish, while the number of other fish will decrease, which will have a huge impact on the ecological environment of the upper reaches of the Yangtze River.
Secondly, the surge in the number of mandarin fish may lead to a decrease in the number of some other fish in the Yangtze River waters, which will lead to a significant reduction in the purification capacity of nutrients such as ammonia nitrogen and nitrite produced by the decomposition of some suspended organic matter in the Yangtze River, thus affecting the water quality of the Yangtze River.
And the surge in mandarin fish populations can also have an impact on the entire ecological network, and the balance of the ecological network is basically dynamic, and this balance is usually formed on the data that we can aggregate, and when the number of a key species changes, it affects the balance of the whole network.
Significant changes in any single species in an ecosystem can affect the health and stability of the ecosystem as a whole.
The importance of ecological protection.
Therefore, it is very important to maintain the ecological balance of the Yangtze River, not only to detect whether the ecosystem has been out of balance, but also to trace the causes of the imbalance, so as to take appropriate measures and cooperate with the plan to solve the imbalance.
As far as the mainland is concerned, it is equally important to maintain the ecological balance of the Yangtze River while promoting the development of the Yangtze River Economic Belt, which was previously released in 2016 by the Yangtze River Basin Ecological and Environmental Protection Plan, which is of great significance for maintaining the ecological balance of the Yangtze River Basin.
This is not only thanks to the suspension of some water conservancy projects in the Yangtze River basin, but also thanks to the mainland government's policy of banning fishing and vigorously reducing the ban on fishermen.
Moreover, the various ecological environment improvement systems on the mainland are very worthy of our praise, and there are countless living beings in the biological kingdom on the land of China, and there are natural laws in them.
Therefore, the explosion of mandarin fish is not feared, it is important to try to find a suitable balance, but what to do is a difficult question.
It is also in this context that it is also necessary to control the population of China, and at the same time to raise people's awareness of the ecosystem and better communicate with the natural world.
And while exploring the laws of nature, we should respect them and accept the gifts of nature with a humble heart.
At the same time, it is also necessary for the next generation to understand the importance of the ecosystem, enhance the respect for the ecosystem, and have great significance for human survival.
This is an important way to maintain the stability of the earth's ecosystem, and it is also an important way for us to live in harmony in the ecosystem and improve the ecological environment.
At the same time, it is also the direction and motivation for countless scientists to forge ahead and continue to explore.
Maintaining the harmony and balance of the ecosystem is also the wish of countless citizens and public participants who play a major role, and it is the common aspiration of all mankind.
epilogue
Therefore, in order to protect China's water system environment, we must not only care for the government, but also the joint efforts of the whole society, only in this way can we maintain the ecosystem of the Yangtze River, as well as China's natural resources, and protect the ecological balance of the Yangtze River basin.
At the same time, it is also our common responsibility to make the Yangtze River better serve the people, and to let the human society continue to develop in a better direction.