The largest outbreak of Enteromorpha Enteromorpha. Recently, the offshore waters of Qingdao, Shandong Province were once again invaded by Enteromorpha Enteromorpha. This is also the 15th consecutive year that Enteromorpha Enteromorpha has affected Qingdao.
The mainstream view is that the cause of the Enteromorpha enterocystis outbreak is excessive levels of nitrogen, phosphorus and other nutrients in the ocean.
At present, Qingdao City has dispatched more than 7,300 ships and salvaged about 240,000 tons of Enteromorpha Enteromorpha.
The Largest Enteromorpha Outbreak 1 Recently, the coastal waters of Qingdao, Shandong Province were once again invaded by Enteromorpha. This is also the 15th consecutive year that the Enteromorpha disaster has affected Qingdao.
According to monitoring from the Beihai Forecast Center of the Ministry of Natural Resources, the scale of enteromorpha disasters in the Yellow Sea has reached a record high.
Qingdao City has launched the "Emergency Disposal for Salvage Enteromorpha Enteromorpha in Coastal Seas" project to ensure that Enteromorpha enteromorpha does not come ashore, or rarely comes ashore, and minimizes the impact of disasters.
At present, Qingdao City has dispatched more than 7,300 ships and salvaged about 240,000 tons of Enteromorpha Enteromorpha.
Zhang Yongju, leader of the Qingdao Marine and Fishery Administrative Law Enforcement Detachment, said that the area covered by Enteromorpha algae in Qingdao waters this year is nine times that of last year.
Qingdao City has issued an orange warning for marine macroalgae disasters on June 18 and initiated a secondary emergency response.
At present, the dense area of ??Enteromorpha has reached the coastal waters of Qingdao City. Affected by the continuous southeasterly wind and reciprocating current, it has caused huge pressure on offshore disposal.
At the enteromorpha enteromorpha centralized disposal point in Qingdao’s Badaxia Square, the reporter saw that trucks filled with enteromorpha enteromorpha were driving here one after another, unloading the enteromorpha enteromorpha and stacking it in the open space of the square, waiting for the next step of centralized disposal and utilization.
At present, Qingdao uses satellite remote sensing, helicopters, maritime cruises, nearshore monitoring, Enteromorpha trackers and other means to increase monitoring and forecasting and comprehensive information analysis, timely adjust maritime interception forces, optimize the layout of nearshore interception networks, and fully implement maritime
Block Enteromorpha.
Zhang Yongju said that Qingdao City has set up three lines of defense on the sea to reduce the landing rate of Enteromorpha Enteromorpha to the greatest extent and ensure that Enteromorpha Enteromorpha does not come ashore or rot.
"We are afraid of strong winds, waves, fog and heavy weather. Once such bad weather comes, fishing boats cannot move, and there is a risk that Enteromorpha enteromorpha will get close to the shore. This is what we are most worried about." The largest outbreak of Enteromorpha enteromorpha 2 Yellow Sea Enteromorpha
The mainstream view of the cause of the outbreak is that the cause of the Enteromorpha Enteromorpha outbreak is excessive levels of nitrogen, phosphorus and other nutrients in the ocean—seawater eutrophication is the root cause of the disease.
Since the 1970s, offshore industry and agriculture have developed rapidly, the amount of domestic wastewater discharged by coastal cities has increased day by day, and offshore cage farming activities have become more and more frequent. This has increased the discharge of organic pollutants, leading to offshore
The water quality is getting richer and richer.
Data from the "China Marine Ecological Environment Bulletin" shows that the distribution area of ??Enteromorpha green tide in my country's Yellow Sea remains within the range of 30,000 to 60,000 square kilometers all year round, with the largest coverage area of ??200 to 600 square kilometers.
Especially in recent years, the scale of Enteromorpha Enteromorpha outbreaks has shown an expansion trend. For example, the maximum coverage area in 2019 was 508 square kilometers, and it increased to more than 1,700 square kilometers in 2021.
The occurrence area of ??Yellow Sea Enteromorpha The frequent outbreaks of Yellow Sea Enteromorpha reflect the increasingly severe eutrophication problem, which is beyond doubt.
It should be pointed out that seawater eutrophication is not a problem in the Yellow Sea itself. The same phenomenon is more prominent in the East China Sea.
Take the 2020 survey report as an example.
Among the four sea areas surveyed, the East China Sea has a total area of ??48,000 square kilometers of polluted seawater, which is much larger than the 25,000 square kilometers of the Yellow Sea and the 13,000 square kilometers of the Bohai Sea, accounting for more than half of the total polluted area of ??my country's offshore waters. .
Overview of water pollution in China’s coastal waters From the perspective of eutrophication of water quality, the East China Sea is the most serious, followed by the Yellow Sea.
Research in recent years has also proven that the outbreak of Enteromorpha cannot be entirely blamed on the offshore waters of Shandong, but also on the seaweed farming in southern Jiangsu.
Jiangsu seaweed farming In the coastal waters of Jiangsu, in addition to land-based input and offshore farming, there is another important source of nutrients: the nutrient transport of the Nanhuang Ocean Current.
The rising ocean currents along the northern coast of Jiangsu have led to excess nitrogen and phosphorus in the surface layer of the South Yellow Sea. Coupled with the continuous transport of organic matter from the Yangtze River, this has further aggravated the eutrophication of Jiangsu's offshore waters.
The Yangtze River flows straight into the East China Sea. More and more studies have shown that the shoals in northern Jiangsu are the "seed bank" for the northern green tide outbreak, where the larvae of Enteromorpha prolifera breed and fatten.
From March to April every year, the seaweed in northern Jiangsu enters the harvesting stage. At that time, a large number of enteromorpha algae segments will fall off the culture rafts and seedling ropes, float on the sea, continue to gather all the way north, and finally form
Tens of thousands of hectares of "sea grassland".
Enteromorpha can also "turn waste into treasure". As early as 2009, domestic experts analyzed the nutritional content of Enteromorpha.
The results show that the protein content in the dry matter of Qingdao Enteromorpha is as high as 11%, the crude fat is 1.5%, and it also contains 1.5% calcium and 9.58% amino acids.