Answer: The marine food chain refers to the marine biological community, from self-sustaining bacteria or organic matter formed by photosynthesis, through plankton, to herbivores, to carnivorous animals at all levels, and in turn forms predators and prey. to the needs of eaters. The structure of the food chain is similar to that of a pyramid. The base is very large and each level is smaller than the previous level. The entire network is made up of a variety of complex food chains. p>
For example The most common: algae - small fish, shrimp - sharks, mackerel, tuna, etc.
From the point of view of the evolution of life, although researchers of various schools have different opinions on the origin of life, the ocean is the land. The mother of life is still the dominant view.
Before the earth was formed, there were many asteroids orbiting around it.r of the sun in the universe, and the planets The original earth was created by the impact. The fireball is full of volcanoes, covered with hot lava, and the sky is filled with dense water vapor emitted from the interior of the earth, forming the primitive atmosphere of the earth. the earth.
As the number of collisions decreases, the earth begins to form from the outside. It gradually cools inward, forming a thin crust on the surface as water vapor in the atmosphere condenses into rain; she fell to the surface. Rainwater accumulated in depressions for a long time, forming a primitive ocean.
Why? We believe that the first life forms appeared in the ocean (actually, "in the water" means more appropriately), because the environment at that time was more favorable in the water than on land. The temperature on earth was either cold or hot; it was either strong winds or stronghe rains, which varied considerably. formed by rainwater seems to be very stable, very suitable for the birth and reproduction of life.
The first life on earth appeared about 3.2 billion years ago , and these life forms are only the simplest. a single-celled body that can only be seen under a microscope. After billions of years of continuous evolution, today it has formed an abundant variety of life.
Regarding the process of evolution of terrestrial organisms, you can use The 24-hour schedule is explain. At midnight, life began, but it was not until nine o'clock in the evening that life invaded the earth. All life previously existed in the ocean, which shows that in the history of the earth. , life in the ocean has existed in abundance since ancient times.
It is estimated that there are approximately 5 to 50 million species, but only 1.46 million species have been recorded, and most of the unrecorded species ofhe species still exist in unknown corners of the ocean; There are a total of 33 phyla in the world biological classification, and the ocean has 32 phyla, and 12 of them only exist in the ocean and cannot be found nearby. the ocean You will find that there are indeed many more species of marine life than on land.
There are many tiny phytoplankton and zooplankton on the surface of the ocean, there are tuna, mackerel and migratory fish; in the middle of the sea ; there are beautiful fish, shrimp and shellfish in the hot springs area; there are barnacles, clams and algae in the intertidal zone; there are juvenile fish, juvenile shrimp...etc. estuary.
The reason why the ocean can accommodate millions of people Millions of colorsColorful and rich species with their own characteristics, and the marine food chain including up to tkings at six levels, are closely linked to the vastness of living space.
The marine food chain refers to marine life. community, from autonomous bacteria or organic matter formed by photosynthesis, to plankton, herbivores and carnivorous animals at all levels, the demand relationship between predators and prey is formed in sequence. The structure of the food chain is similar to that of a pyramid, with a very small base. Larger, each higher level is smaller than the previous one. The entire network is formed by a variety of complex food chains.
Phytoplankton is the most important primary producer in the food chain, like algae. Then, in the sun, phytoplankton converts carbon dioxide and water into carbohydrates through photosynthesis, that is, they convert solar energy into chemical energy in the form of chemicals, store it and release it. fofeeds on second-tier zooplankton (such as krill) and other herbivores. Sexual and omnivorous animals feed. Since most phytoplankton are a group of organisms so small that it is difficult to distinguish them with the naked eye, it is not easy to see their shapes, but from the wide area of photosynthetic distribution shown by satellite. photos Look, these are the giants of the ocean.
Small fish and shrimp belong to the second and third levels of the marine food chain. They feed on phytoplankton or zooplankton. food chain. The top layer of the pyramid, such as sharks, mackerel, tuna, etc.
In terms of living space, marine life is much luckier than land species. the land is 510 million square kilometers, and the ocean occupies The average depth of the ocean is 3,795 meters, almost the height of Yushan Mountain. In asuch a vast space, the topography of the seabed is the same as that of the earth, with mountains, narrow valleys, volcanoes. From the coast, they can be divided into continental shelf, continental slope, ocean plain, seamount, mid-ocean ridge, abyss and trench. Even if the depth is different, the pressure varies greatly, but in theory, as long as the pressure is adjusted well, marine life can float, feed, mate and reproduce in the sea very quietly.