<h1>01</h1>
It was a dull afternoon, and the sun was catching up with cars on the asphalt, approaching the horizon. When you reach Fuxian Lake, the sun pours obliquely on the lake, but the wind comes with the coolness of the lake. At that moment, I seemed to touch the years of Fuxian Lake, and in the flowing water of those years, it was full of bitterness and sentimentality, but it was also completely different from the sea, and every layer of waves was full of mercy.
This is the second time I have come to Fuxian Lake, the second time I have known Fuxian Lake, witnessed her glass and made friends with the little life living in Fuxian Lake.
<h1>02</h1>
The Fuxian Lake ecosystem belongs to the freshwater ecosystem, although the freshwater ecosystem only accounts for a very small part of the earth's aquatic environment, they are indispensable and crucial to the terrestrial ecosystem.
The temperature of Fuxian Lake affects the distribution of organisms, which is similar to the ocean, but on a relatively small scale. The area near the edge of the lake is the shore area, where the light reaches the bottom of the water and where rooting plants grow. Further into the middle of the lake is the center of the lake, which is home to plankton and fish. Beyond the depth that effective light can penetrate, is the lake bottom area that lacks light. Although the surface of the lake bottom area is unremarkable, it hides the intense biological activity caused by the decay of organic matter. Anaerobic bacteria occupy the bottom of the water below the lake bottom area, but the bottom of the lake shore area is full of aerobic decomposition organic matter.
Although the biodiversity of Fuxian Lake is far inferior to that of the sea, in fact, fuxian Lake still has a fairly rich species. In fact, as early as the Cambrian period 540 million years ago, the earth was almost covered by the ocean, china's land map has not yet formed, the Yunnan-Guizhou region is still a quiet shallow sea, and today's Fuxian Lake is in this area. At that time, the area where Fuxian Lake was located was deposited with large phosphorus-bearing formations, and this substance happened to be related to the explosion of life. As a result, countless marine creatures have evolved their lives here. After hundreds of millions of years of changes, the sea water has long receded, and Fuxian Lake, which is formed by the accumulation of water in the graben basin formed by strong ground fracture, is still full of vitality.
<h1>03</h1>
In fact, diving in Fuxian Lake is a test of patience. Unlike most dive shops in Southeast Asia, the source of customers here may be mainly locals, so everyone is used to a different kind of laziness. Sometimes it is not a good thing to say that you can go into the water at 10 o'clock, but for various reasons, you can wait for 1 or 2 hours and wear a 7MM wet suit. While waiting, he accidentally found a stranded squid. Some learned elderly people in the local area call them the squid. In fact, sturgeon is not a local fish, it is an exotic species. In the literature, the increase rate of exotic fish in Fuxian Lake is amazing, from 9 species in 1983 to 14 species in 1996, especially since the mid-1990s, with the intensification of human activities, the increase in alien species in Fuxian Lake has become more obvious.
In the earlier survey, there were 39 species (subspecies) of fish in Fuxian Lake, including 25 species of indigenous fish, of which 12 species of endemic fish. Among them, the anti-wave fish is the most famous. Anti-wave fish is a rare indigenous fish unique to Fuxian Lake, belonging to the carp order, with a green belly and white belly, shaped like a short shuttle, small and exquisite, about 10 cm long. It was once nearly extinct due to overfishing. With the strengthening of protection and artificial breeding in recent years, the anti-wave fish have regained their vitality. It is a pity that this dive did not see the anti-wave fish copied to the market for thousands of yuan.
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<h1>04</h1>
Diving in Fuxian Lake, the whole world is no longer the blue of the ocean, nor is it the blue that the surface of the plateau lake looks like. In Fuxian Lake, the whole world is a green, a turbid green. In this green, it is full of invisible life. The blurred green in the distance is like a mountain range under the water, beautiful and lonely. Up and down the water, between the virtual image and the real image, it is like a lingering ambiguity with Fuxian Lake, and human beings will always be completely attracted by such beauty.
Like many lakes, Fuxian Lake also undergoes seasonal temperature stratification in a cyclical manner. The whole process generally begins with the warm water surface of the summer sun. When the water temperature warms, the density of the water will become smaller, the weight will become lighter, and thus it will float above the colder, denser water layer, which is the cause of the oblique thermosphere.
In the second dive of the day, without warning, it entered the oblique thermosphere, and the temperature dropped directly to 14 degrees. The wet suit of 7MM seems to be unable to resist the coldness of Fuxian Lake, and the whole space is filled with a breath of silence. Summer seems to have suddenly come to an end, sinking into the boundless cold winter. The surging coldness kept me in a detached calm, leaving the chill that was firmly stationed at the tip of my finger useless. Those small fish, who only have 3 seconds of memory, rush past, they are lost only people who have not remembered, and I hold them tightly in memory.
<h1>05</h1>
This time in the diving in Fuxian Lake, I did not really see the diversity of Fuxian Lake's biological diversity, but the unique coldness of Fuxian Lake still made me immersed in it. Maybe one day, I will fall in love with Fuxian Lake like the people here. In the future, I will once again meet with the various little lives in Fuxian Lake, and the green that is full of life here will be added to my colorful world and will never fade.