Agriculture Idol

Chapter 77 The First Emergence of Ecological Restoration
The meeting with Li Chengxin was an old professor who helped Li Chengxin do seawater sampling and analysis before. Thinking that July and August are summer vacations, the school is fine, and his former student Li Chengxin contracted a ping of coastline to do a governance experiment by the sea, which made him very interested , it was a good opportunity to organize students to do summer field internships, so I brought a few of my postgraduate and doctoral students here.

In the yard behind Li Chengxin's boat house, several students started to build tents by themselves.

The village committee attached great importance to the professors and students from these institutions of higher learning, and suggested that Professor Yang and his students live in the village committee, or rent a bed in a family with few people in the village, but Professor Yang refused.After all, he came out to do scientific research, and he didn't have much funding, and he didn't want to bother the villagers too much.What's more, in summer, Li Chengxin is the only one living in this small yard. The yard is spacious and it is convenient to go to the beach, so why not just set up a tent at his house.In fact, the conditions for living in tents are not bad. In contrast, the students are more willing to camp.After all, Li Chengxin was Professor Yang's former student, and he could be regarded as the senior brother of these students.With such an extra layer of relationship, it is convenient for everyone to learn from each other. If you live with the village committee, you may have to be trembling for fear of ruining the property of the peasant uncles.

A few villagers who brought people here from the entrance of the village have long heard that these are graduate students, doctoral students, and old professors from the city. Those who can study at this level are all noble figures, and they are all happy to help. Simple tasks such as carrying daily necessities.As for the instruments they brought with them, they just looked around. When they heard people chatting before, they said that the instruments brought by these schools are basically imported from abroad. They are old and expensive. If they are broken With their economic conditions, they cannot afford to pay.

Having said that, those who wanted to go up and touch those bright white, high-end looking things also stopped.

This is why Li Chengxin hastily bid farewell to the crew and returned to Hongming Village.

The old professor Yang Qifeng is over 60 years old this year. He stayed in the Department of Marine Meteorology of the Ocean College more than 30 years ago to teach. More than 20 years ago, he was a professor at the School of Marine Environment.Now the main research directions include water environmental ecology and zooplankton ecology, fishery waters environmental ecology and bioremediation technology, etc., holding countless national-level project topics in hand.

This is not the kind of "brick house", but a real "expert".

When Professor Yang came over, he couldn't wait to call Li Chengxin, rowed his small sampan, and studied the circle of bamboo clumps Li Chengxin made for the survival of small creatures and the hanging net mussels used to filter seawater.

The influence of the red tide is still there, but compared to the previous live broadcast, the red color has become much lighter, and the water has become clear, and even small fish have settled nearby.

After the students set up their accommodation tents, one of the oldest and most experienced students instructed everyone to take out the kayaks, and some people took out the diving equipment, warmed up, and prepared the equipment to inflate the kayaks .

The next step they have to do is to install camera surveillance equipment in the nearby waters and beaches.

A few people got into the kayaks and took their diving equipment to chase after Professor Yang. Afterwards, Professor Yang would instruct them to install underwater video recording equipment.

Those who stayed on the shore installed cameras and carried out surveying and mapping work on the shore under the instructions of the experienced student Xiao Jia.

After a week, I went to check the mussels placed on the hanging net at the end of the sea area contracted by Li Chengxin. As soon as I got close, Li Chengxin found something wrong.

"Huh? Why is the floating platform so green?" Li Chengxin asked strangely.

When they made sea urchin breeding cages last year, they used freshly cut bamboo, so the pontoons were emerald green at that time.But when making this small pontoon, Brother Xiaoyong used old bamboo poles left over from the last time. They were all the ones that turned yellow after drying. It is absolutely impossible for them to turn green again due to soaking in water.

"It's algae." Professor Yang pulled the floating platform to the side of the small sampan, scooped it into the water, and picked up a large handful of slippery seaweed, "It should be because during the red tide, the algae are rich in nutrients due to seawater And those produced by mass reproduction are all attached to the bottom of the floating platform."

Li Chengxin also fished below, and observed the situation in the water with a periscope. There were dense seaweeds growing under the floating platform, intertwined with the mussels, swaying with the current, and looked very Cthulhu.

Seeing that the algae under the floating platform were all green, Professor Yang felt relieved: "That's good, there are no plants in the water in your area, and these algae can just carry out photosynthesis and provide oxygen for this area."

When it was over, they called Li Chengxin to help, and together they fished the hanging net containing the mussels out of the water and put them on the floating platform for observation.

"Wow! This change is really big!"

The hanging net with mussels was thicker than Li Chengxin remembered, and more small mussels were attached to the net ropes, and occasionally there were clumps of barnacles.

He took out his mobile phone and showed Professor Yang what it looked like when they first made the hanging net of mussels. Compared with the one in front of them now, the hanging net at that time was much slimmer and cleaner.

"This is probably because during the red tide, the single-celled plankton increased in large quantities, which made these mussels full, so they reproduced a large number of small shells. In this way, there are more mussels, and the ability to purify seawater is also greater. stronger."

With the loss of seawater in the net bag, a few small crabs actually ran out of the mussel pile. These omnivorous small crabs can clean up the remains of shells and seaweed, and have also become the mussel hanging net ecosystem. a part of.

Professor Yang nodded again and again: "This first step in restoring the ecology has been done very well."

Back on the shore, several students were collecting sand and stones for biological analysis in the marked sampling area on the beach and rocky beach.

Bivalves such as Meretrix meretrix are an important indicator for assessing ocean currents and coastal environments.

Clams are buried shellfish and are mostly found in the intertidal zones of coastal inner bays near relatively flat river mouths, as well as in fine sand and mud beaches in shallow sea areas.The habitat depth varies with the water temperature and individual size. It is mid-July now and the temperature is extremely hot. The clams live in the shallow layer and are very easy to find.

Meretrix meretrix is ​​a broad-temperate brackish water shellfish, which mainly feeds on tiny planktonic (or benthic) diatoms.It has the habit of moving from the mid-tidal zone to the lower zone of the low-tidal zone with changes in water quality factors or growth habits, commonly known as "running flow".Fertilized-fertilized-egg-hatched are all in the planktonic juvenile stage for about two weeks.From March to June, when the juvenile Meretrix meretrix grows to 1-1.5 centimeters, it will find a beach to live on, which is called "bottoming".It will take another one to three years to grow to a size of 3-5 cm and start the next round of reproduction.

Meretrix meretrix also has the ability to purify seawater and sand by eating organic matter in sandy beaches.

After some searching, one or two clams of about 10 cm can be found at basically every sampling point with a radius of 1 cm.Although the number is relatively small and the average width is relatively small, it at least proves that the ecology on this coast is still healthy-it would be even better if you can find sea earthworms, which are far more capable of purifying sand than meretrix clams. But they were not found on this coast.

(End of this chapter)