The "sea of grass" is not the seaIt is one of the three major plateau lakes in China located in the middle of the Yunnan-Guizhou Plateau.
In 2014, a series of conservation policies were implemented to save the ecosystemStop the boating tourFishing, swimming, pollution and breeding are prohibited in the lake.
Surprisingly, it didn't take long for this decision to trigger a butterfly effectThe sea of grass is "full of fish", and the aquatic plants are eaten up, becoming a "bald sea"!
So, how did the "sea of grass" problem come about? The Yangtze River is also facing the same problem, will it follow in its footsteps?
Caohai is located in Guizhou Province and is one of the important tributary lakes in the upper reaches of the Yangtze RiverIn order to protect the ecological environment, a fishing ban has been implemented.
However, the unexpected thing isAfter the ban on fishing, the number of fish in the grass sea has increased dramaticallyThe ecological environment has changed dramatically.
According to the monitoring of a university in Guizhou,The sea of grass alone is 25 square kilometers and there are as many as 1200 million fish, with an average of 48 fish, which is higher than the density of artificially farmed fish ponds.
The large number of fish activities makes the lake muddy, the aquatic weeds cannot grow normally, and at the same time, they cannot eat the food needs of so many fish, so they can only feed on aquatic weedsThis leads to a further reduction of aquatic weeds in the sea of grasses, which becomes a vicious circle.
Faced with the grim ecological situation, the local environmental authorities took actionAttempts to control fish populations through moderate fishingto restore a stable ecosystem.
However, due to the large number of fish, it is difficult to fish, and there are also difficulties in processingThis is a completely new topic.
Compared with Caohai, there are many similar plateau lakes in Guizhou Province that are facing a similar dilemmaMost of these lakes are located in remote mountainous areas, which are sparsely populated and have a fragile ecological environment.
With the influx of immigrants and the development of tourism,Ecosystems have been damaged to varying degreesIn order to protect the ecology, some lakes have implemented fishing bans and swimming restrictions.
But we must recognize that ecosystems are a complex organic wholeAny initiative needs to be carefully assessed for its impact on the balance of the system.
Guizhou Province has taken the construction of ecological civilization as a priority development strategy, and has set up a special investigation team for the ecological problems of lakes such as CaohaiA series of measures have been taken, including investigation and monitoring, scientific demonstration, classification guidance, and regular evaluation.
While protecting the ecology and promoting sustainable economic and social development, experts also called for strengthening popular science education for the public and enhancing everyone's awareness of environmental protectionMake environmental protection measures understand and support all sectors of society.
In the coming period, Guizhou Province will continue to carry out ecological environment monitoring and assessment workResearch to determine the carrying capacity and rational use patterns of different ecosystems.
On this basis, we should formulate a feasible protection and utilization plan, and at the same time, strengthen exchanges and cooperation with upstream and downstream areas, and coordinate the ecological protection of the river basinAchieve sustainable use of water resources.
Let's work together to preserve the green mountains and rivers for future generationsProtect the living water of the homeland.
In 2020, China officially implemented a ten-year fishing ban policy on the Yangtze River, and in the past three years, under strong supervision, illegal fishing in the Yangtze River basin has decreasedAll kinds of fish resources are showing a recovery trend.
According to monitoring data released by the China Fishery Association and the fishery administration department of the Yangtze River basin, the fish population in the Xiangjiang section has increased by 23 species compared with before the fishing banThe number has also increased by 15 times.
In the main stream of the Yangtze River, the number of fish at the confluence of the Jinsha and Han rivers has nearly doubled from before the fishing banThe population reached 58 species.
Scientists tracked sturgeon tagged sturgeons into the worldThe released sturgeon can gradually adapt to the Yangtze River and migrate along the river.
The release also confirmed that the number of finless porpoises, which once only existed in more than 1,000, has increased to 1,249 in 2022, and some rare fish that have not appeared in the past 20 years, such as the natural protected animal Baiji fishIt also appears again in Poyang Lake and so on.
It can be said thatThe continued fishing ban has played an important role in the maintenance of the Yangtze River ecosystem.
However, we should also be soberly aware that there is still a long way to go to fully restore the ecological environment of the Yangtze River, although monitoring has found that the age structure and body size of some dominant fish, such as whitebait and herring, have improvedHowever, many rare fish such as the Chinese sturgeon are still underfrequent.
Investigations by scientific research institutions have found that overfishing has seriously affected the natural reproduction of Chinese sturgeonsThe survival rate of artificially bred Chinese sturgeons is also not high.
Due to the accumulation of water pollution problems over the years, the living environment of these rare fish has deteriorated, and they are also facing great survival pressure, and some large migratory fish such as white sturgeon have become extinct in the Yangtze River, and they should be allowed to return to their native riverLong-term protection and efforts are needed.
In addition, factors such as illegal fishing, hydropower project barriers, and rising water temperaturesIt also increases the difficulty of protection.
According to law enforcement agencies, although illegal fishing has decreased significantly since the ban on fishing in the Yangtze River, individual fishermen are still operating illegally in the prohibited areasThis poses a threat to the fish stocks that are recovering.
Large-scale hydropower projects have also blocked the migration pathways of migratory fish, and global warming has led to an increase in river temperaturesAll these have an adverse impact on the survival and migration of fish in the Yangtze River Basin.
It can be said that the restoration of the ecological environment of the Yangtze River requires the joint efforts of all partiesIn order to gradually achieve the goal of abundant fish resources and good water quality.
The problems caused by the 10-year fishing ban in Caohai are largely due to the fact that fishing is only over-restrictedLack of active measures to restore biodiversity.
This gives us a revelationThe Yangtze River fishing ban cannot mechanically copy the Caohai model, while restricting fishing, focus on restoring species diversity.
Supervision should continue to be strengthened, illegal fishing should be cracked down, and a good environment should be created for the restoration of fish resourcesUse high-tech means such as drones and satellite imagery to improve the effectiveness of supervision.
Through the scientific compensation mechanism, guide fishermen to adopt environmentally friendly production methodsAffected fishermen can be appropriately subsidized to install environmentally friendly fishing gear, such as glow-in-the-dark fishing tackle.
At the same time, we will increase investment in scientific research and continue to summarize the lessons and lessons of the Yangtze River fishing banProvide a basis for formulating scientific and rational policiesIt is necessary to strengthen the investigation of fish resources and environmental monitoring, and establish a scientific database.
Strengthen public awareness of environmental protection, create an atmosphere for the whole society to jointly protect the ecology of the Yangtze River, and carry out publicity and educationRaise public awareness of protection.
If all parties work together to scientifically formulate and implement a fishing ban policy, we will be able to avoid the mistakes of Caohai and ensure that the fish resources of the Yangtze River can fully recover as soon as possibleMother Yangtze River will always maintain its vitality.
How unwise policies can disrupt the ecological balance,and how to better protect the ecological environment.
The ecological balance of rivers and lakes is facing a serious threat from human activities, and overfishing destroys the ecosystemCausing species extinction.
In order to protect the ecological environment, some regions have implemented a complete ban on fishing, but these policies are often not well considered and cannot be adapted to local conditions, resulting in social problemsEcosystems have also not been effectively protected.
Different regions have different situations, and the one-size-fits-all fishing ban policy does not take this into account, and it causes fishermen to lose their jobsNor can it meet the needs of fishing enthusiasts.
This not only affects the livelihoods of fishermen, but also deprives the public of their right to participate in the sport, and some fishermen have to fish illegally in order to surviveThis in turn exacerbates the damage to the ecosystem.
It is worth mentioning that the simple ban on fishing has limited the scientific community's access to aquatic resource surveys, and some harmless scientific research activities have been classified as "off-limits".It also influences our in-depth understanding of the ecosystem.
More seriously, ecosystems are complex networks, and a simple ban on fishing will not restore its balance, for example, when the population of a particular species of fish declinesThe food chain will be disrupted.
The biological chain that is closely linked between the upstream and downstream can have a chain reaction that we often struggle to ** its impact, and the decline of some species can even lead to the proliferation of othersInstead, it endangers ecosystems.
Therefore, we need to develop individual protection measures for each ecosystemRather than one-sided and arbitrary interventions.
In addition, the sudden suspension of existing fishing activities will also have a impact on the local economyMany coastal cities rely heavily on fisheriesThe fishing ban policy needs to consider both new jobs and financial compensation.
If it is simply banned, without providing other economic pillarsThen these regions are likely to fall into recession, which will not only affect the present, but also change the direction of future development in these regions.
The lesson from these failures is that we need to better understand the uniqueness and complexity of each ecosystem, and that policies cannot be simplifiedThere are various possible impacts to consider.
At the same time, policies need to be flexible enough to adapt to changes in the environment, and finally, we need to focus on the self-regulating capacity of ecosystemsAvoid excessive external intervention.
Protecting the ecological environment requires comprehensive consideration of various factorsSimple prohibitions are often counterproductiveWe need to respect the laws of nature and try to find a balance.
Only in this way can man and nature truly live in harmonyOnly then can our homes be sustainable.
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