An example of the destabilizing effect of destroying a forest ecosystem

The biological chain refers to the interdependent chain relationship formed by animals, plants and microorganisms providing food to each other. This relationship is easy to see in nature.

For example, where there are trees, there are often birds, and where there are flowers, there are often insects. Plants, insects, birds, and other organisms are bound together by a chain of organisms, dependent on each other to live and die.

Examples of biological chains are often all around us, and they benefit humanity immensely. For example, the leaves and fruits grown by plants provide food for insects, insects become a food source for birds, and with birds, there will be eagles and snakes, and with eagles and snakes, rodents will not become plagued .......

When animal droppings and carcasses are returned to the soil, microorganisms in the soil break them down into simple compounds that provide nutrients to the plant and cause it to grow new leaves and fruits. In this way, the biological chain establishes a healthy cycle of substances in nature. The biological chain can also be understood as the food chain in nature, which forms the phenomenon of "one thing descending from one thing" in nature, maintaining the natural quantity balance between species.

Humans and nature are also connected through the food chain. Human food is mainly derived from plants and animals. Plants and animals are nourished from the natural environment before they grow.

If these animals and plants contain ingredients from environmental pollution, it is dangerous for people to eat them. For example, if there is mercury pollution in nature, and some microorganisms in the soil can convert mercury into organic mercury, fish will store organic mercury in their bodies if they eat such microorganisms, and if people eat such fish, mercury will enter human nerve cells, and people will get the terrible Minamata disease. Minamata disease is the most typical example of human pollution of the environment, and the contaminants end up entering the human body through the food chain and seriously harming human health.

Hehe, there are frequent sandstorms, serious soil erosion, and it also has an impact on the content of oxygen.

China's Loess Plateau is the best example: First, resource destruction. Human beings excessively consume various mineral resources. According to traditional consumption calculations, the world's oil is only enough to last for 50 years, and coal and natural gas are only enough to be exploited for 200-300 years.

The second is ecological destruction. In the 50 years of the last century, half of the world's forest resources have been lost. According to the Food and Agriculture Organization of the United Nations, 2,000 square meters of forest are destroyed every minute on the planet.

The third is desertification. The world's desertified land has reached 36 million square kilometers, almost the land of China, the United States and Russia combined.

Fourth, species decline. On average, one species is wiped out every day on Earth, and it is expected that 6,000 plant species will be wiped out on Earth in the next 30-40 years.

Fifth, environmental degradation. Environmental degradation is a prominent problem caused by industrial civilization and unsustainable development for human beings. The London smog incident of 1952, which killed 4,000 people in five days.

Others such as water pollution, acid rain, photochemical pollution, etc. are manifestations of destruction of nature Marivan is a small island in the Indian Ocean, in 1945, the first expedition from South Africa came here, and a few mice that came with the ship also quietly slipped ashore, and in 1948, the mice became the overlord of the island, and the expedition team transported in 5 cats to catch mice, but the taste of seabirds is better than mice, cats do not catch mice but eat birds, as a result, cats breed to 2,500, birds suffer, 600,000 are eaten a year.

In the thirties of the 20th century, some traders transported African giant snails to the Hawaiian Islands for human breeding and consumption. Some snails are old and inedible, so they are thrown into the wild, and within a few years, snails multiply in large numbers, everywhere, gnawing vegetables and fruits into a mess. People spray chemicals, and the land cannot be removed after 15 years of ploughing.

Americans have long imported goldfish from Japan, and in 1973, some goldfish accidentally fell into the water of Washington state, and then multiplied in large numbers, and a few years later, goldfish took over 10 lakes; The trout in the lake could not compete with the goldfish for food, and the production was greatly reduced, and the fishicide could not kill the goldfish, and the fishermen complained bitterly.

Rabbits are not native to Australia, and there were no rabbits there until 1859. But in that year, a farmer brought a herd of hares from England, a total of 24 of them. Little did he know that his move would cause an agricultural disaster.

In Australia, rabbits have few natural predators, so over the decades they have become a big problem. They eat crops, destroy newly sown seeds, gnaw tender bark and teeth, and burrow into the ground to damage fields and river banks. Nor does fencing prevent them from encroaching on farmers' fields.

Over the course of a few decades, Australia's agriculture has suffered heavy losses.

1. Air pollution is soot-type pollution, with dust and acid rain being the most harmful, and the degree of pollution is intensifying.

2. Acid rain is mainly distributed in the south of the Yangtze River, the east of the Qinghai-Tibet Plateau and the Sichuan Basin. Acid rain is the most polluted region in central China.

3. The waters of rivers, lakes and reservoirs are generally polluted to varying degrees, except for some inland rivers and large reservoirs, the pollution has become an aggravating trend, and the water pollution near industrially developed cities and towns is particularly prominent.

4. Among the seven major river systems (Pearl River, Yangtze River, Yellow River, Huai River, Hailuan River, Liao River, and Songhua River), the Yellow River Basin, Songhua River, and Liaohe River Basin are seriously polluted.

5. Total phosphorus and total nitrogen pollution in large freshwater lakes are widespread, and eutrophication is serious.

6. The Bohai Sea and the East China Sea are heavily polluted in the four major sea areas, while the South China Sea is lighter.

7. The deterioration of the ecological environment of fishery waters has not fundamentally changed, and is showing an aggravating trend.

8. Urban environmental pollution is aggravating.

9. Urban ground water pollution is generally serious and shows a deteriorating trend. The vast majority of rivers are polluted to varying degrees.

10. 2 3 rivers and more than 10 million hectares of farmland across the country are polluted.

China's Loess Plateau was still a primeval forest during the Han Dynasty, but excessive deforestation led to soil erosion.

Theodore, USA. Roosevelt wanted the deer in the Kaibab Forest to be effectively protected and multiplied. He declared the Kaibaber Forest a national hunting reserve and decided to hire hunters to go there to the little plum wolf.

Later, in 1942, less than 8,000 diseased deer were left in the middle finger of the entire Kaibab Forest.

"The Way of Nature".

This one mainly writes that because humans do not obey the way of nature (that is, the ecosystem), they help the turtles who think they are scouts reach the sea, so that the returnees climb out of the holes one after another, and become the lunch of the birds.

On the surface, humans have helped the turtles, but in fact they have harmed the turtles.

Tell us not to violate the ecosystem, they are the law.

Helping them, but actually harming them.

For example, in the fifties, China launched a campaign to eradicate sparrows as the "four pests". However, in the years following the killing of sparrows, there was a serious insect infestation, which caused huge losses to agricultural production. Later scientists discovered that sparrows are good at eating pests.

The sparrows were eliminated, and the pests had no natural enemies, so they multiplied on a large scale, leading to a series of tragic consequences such as insect plagues and farmland harvests. The balance of ecosystems is often a dynamic equilibrium that nature has established over a long period of time. Once disrupted, some balances cannot be rebuilt, and the consequences may be irreparable by human efforts.

Therefore, human beings should respect the ecological balance and help maintain this balance.

Actually, I don't know, just ask someone

Ecosystems are interconnected. For example, forest ecosystems provide water, oxygen, etc., and urban ecosystems, farmland, etc., will be destroyed after they are destroyed.

Once a forest ecosystem is destroyed, it can have an impact on other ecosystems on several levels:

1) For river ecosystems: many forest ecosystems are located in the source of rivers, and forests have an important protective effect on upstream hydrology and water quality, such as rainwater can be gradually released through the slow release effect of forests, but once destroyed, a large degree of precipitation will immediately fall on the surface, forming surface runoff, resulting in soil erosion, and rainwater mixed with a large amount of mud and soil organic matter accumulates more and more, which may lead to debris flows or catastrophic floods in steep terrain; Surface runoff that is not filtered by forests and mixed with a large amount of sand and gravel flows into the river channel, which will lead to the destruction of the river ecosystem and the alteration of aquatic habitat.

2) For grassland ecosystems: forest ecosystems are also a powerful barrier to grassland ecosystems, playing a role in preventing wind and fixing sand and protecting ecological diversity. Once the forest system is destroyed, the grassland is exposed to severe winds, especially in spring, when the vegetation has not yet returned to green, which will lead to dusty weather, and sandstorms will become more and more intense, because of the lack of vegetation to protect the surface, there will be sand and dust into the wind, resulting in the aggravation of the degree of sand and dust; The destruction of grassland seed banks adversely affects future vegetation restoration.

3) For farmland ecosystems: forest ecosystems have the functions of conserving water sources, increasing humidity, and attenuating regional climate disasters. However, once destroyed, soil erosion is serious, land organic matter declines rapidly, soil fertility declines, and farmland yields decline.

4) For the urban ecosystem: the forest ecosystem can effectively increase the content of negative oxygen ions in the city and increase the atmosphere of urban leisure and vacation.

Hope it helps.

How did you end up with this question???

formation of lactomar eutrophication; mercury poisoning in Japan; Fluoride destroys the ozone layer; deterioration of the ecological environment of the Aswan Dam; the evil results of the application of "666" and "DDT"; The "greenhouse effect" of the planet

In 1934, the Black Storm in the western United States destroyed more than 4,500 acres of arable land; In 1963, a major storm occurred in the agricultural reclamation area of the former Soviet Union, destroying more than 300 million acres of land; The destruction of forests also led to the extinction of the ancient Babylonian civilization; The Thar Plain, between India and Pakistan, has been reduced to a desert due to deforestation, covering an area of 650,000 square kilometers; The deterioration of the ecological conditions in the Yellow River Basin in China stems from the destruction of forest vegetation in the upper reaches of the Yellow River, and the Yangtze River will become the second Yellow River. The deterioration of ecological conditions in the northeast forest area is mainly due to the unreasonable logging and over-logging of forests in the southwest and northeast forest areas.

forest pests and diseases caused by overhunting natural enemies of insects; In India, the killing of otters in large quantities has increased the number of diseased fish and reduced fish production; In Australia, where animal husbandry is developed, dung beetles are infested due to cow dung covering grasslands.

Like surface water, groundwater is also threatened by pollution, mainly from the infiltration of surface or soil water, agricultural nitrogen fertilizer and oil and phenol in garbage pollute groundwater, once nitrate in nitrogen fertilizer enters the ground, it will be converted into nitrite, which can be converted into carcinogens in the human body. The destruction of surface vegetation and the drainage of wetlands reduce the infiltration of surface water, thereby lowering the diving surface. Due to the excessive needs of cities and industry, fresh water is constantly being pumped out for domestic and industrial use and then re-discharged as surface sewage, which also leads to further decline of the diving surface.

On the other hand, extensive and frequent irrigation can enhance the infiltration effect, allowing the diving surface to rise all the way to the surface. In arid areas, the land infiltrated by water causes the precipitation of salts in the groundwater due to abnormal evaporation, and sooner or later becomes saline-alkali land that cannot be cultivated.

Water conservation.

Water on the planet seems to be inexhaustible, but in fact, in terms of current human use, only fresh water is the main water resource, and only a small part of fresh water can be used by people. Freshwater is a renewable resource, and its renewability depends on the Earth's water cycle. With the development of industry and the increase of population, a large number of water bodies have been polluted; In order to pump river water, many countries have built dams in the upper reaches of rivers, which has changed the flow of water and seriously affected the circulation and self-purification of water.