The main functions of the tropical rainforest, the environmental characteristics of the tropical rai

Environmental characteristics of tropical rainforest: 1. Rainy: annual precipitation can reach more than 2000 mm. 2. High temperature: the average annual temperature is 25 30, the average temperature of the coldest month is also above 18, and the extreme maximum temperature is mostly below 36.

Tropical rainforests are mainly found in Southeast Asia.

Northern Australia, Amazon River in South America.

river basins, the Congo River basin in Africa, Central America, and numerous Pacific islands. The main role of tropical rainforests is to regulate the climate, prevent soil erosion, purify the air, and ensure that the material circulation of the earth's biosphere is carried out in an orderly manner.

Tropical rainforest climate.

The main reasons for the formation: 1. Located in the tropics, it is the main reason for the formation of tropical rainforest climate with high temperature throughout the year. 2. Affected by the equatorial low pressure throughout the year, the prevailing updraft is the main reason for the formation of tropical rainforest climate with rainy weather throughout the year.

The rainforest is the world's largest biological gene bank, as well as a huge active bank for the biological cycle transformation and storage of carbon. The protection of rainforests has become one of the most pressing ecological issues at present.

1. The tropical rainforest is a kingdom of trees, and it is extremely rich in species.

2. Perennial high temperature and rain, the average temperature of each month is between 25-28, and the precipitation can reach more than 2000 mm.

3. There are many kinds of animals.

4. The special prosperity of vines and epiphytes is an adaptation mode for special competition for space, which has a great impact on the forest structure.

Tropical rainforest: Tropical rainforest is a forest ecosystem on Earth that is commonly found in tropical areas near the equator, mainly in Southeast Asia, northern Australia, the Amazon basin in South America, the Congo River basin in Africa, Central America, and many Pacific islands. Tropical rainforests are undoubtedly one of the most precious resources that the Earth has given to all living things on Earth. Since more than 25% of modern medicines are now extracted from tropical rainforest plants, tropical rainforests are known as the "world's largest pharmacy".

At the same time, because the photosynthesis of many rainforest plants has a particularly strong ability to purify the earth's air, among which the Amazon rainforest alone produces 1 3 of the world's total oxygen, so it has the reputation of "the lungs of the earth".

Rainforest trees, a lot, have very large leaves. There are also many dangerous animals or plants.

Very useful and helpful for writing essays.

1.Purifying the air: purifying the air.

2.It has a natural epidemic prevention effect.

3.Natural oxygen plant.

4.Natural muffler.

5.It has a regulating effect on the climate.

6.Change the low air flow.

7.Dust removal and filtration of wastewater.

8.Habitat for a wide variety of animals.

9.In addition, tropical rainforests also have a material use, providing timber for production and living.

1. Air purification: air purification.

2. It has a natural epidemic prevention effect.

3. Natural oxygen plant.

4. Natural muffler.

5. It has a regulating effect on the climate.

6. Change the low air flow.

7. Dust removal and filtration of sewage.

8. Habitat of a variety of animals.

9. In addition, tropical rainforests also have material uses to provide timber for production and life.

It is high temperature and rainy throughout the year, and there are obvious dry and wet seasons. The annual variation of solar radiation is small, and because the sun passes through the zenith twice before and after the spring and autumn equinoxes in a year, the annual variation of meteorological elements has the characteristics of bimodal type.

The average monthly temperature varies between 24-28 in a year, and the annual temperature difference is generally not more than 5, especially in the ocean, usually not more than 1. The diurnal variation of temperature is larger than that of the year, and the diurnal range can reach 10-15.

However, the daily maximum temperature rarely exceeds 35, and the daily minimum temperature rarely falls below 20. Humidity is high throughout the year, with an average of more than 90% in the case of the lower Amazon. Precipitation is abundant, mostly accompanied by thunderstorms, with an annual precipitation of 1500-3000 mm, and a maximum of more than 6000 mm in mountainous areas, such as 9470 mm of annual precipitation in Benja, a volcanic foothill in Cameroon, Africa.

The seasonal distribution of precipitation is relatively even, but there are still significant differences in individual regions.

1. The tropical rainforest is a kingdom of trees, and it is extremely rich in species.

2. In this environment with suitable hydrothermal conditions, the competition for light and living space is extremely strong.

3. The special prosperity of lianas and epiphytes is a special adaptation mode for competing for space, which has a great impact on the forest structure.

4. The variety of animals is also rich and diverse.

1. Purify the air - the purification of the air, with the rapid development of industrial and mining enterprises and the rapid increase of fossil fuels for human life, the polluted air is mixed with a certain amount of harmful gases, threatening human beings, of which sulfur dioxide is a widely distributed and harmful harmful gas. All living things have the ability to absorb sulfur dioxide, but the rate and ability to absorb it are different. Plants have a huge leaf area and absorb much more sulphur dioxide than other species.

It has been determined that the air in forests contains 15 to 50% less sulphur dioxide than in open areas. In the summer of high temperature and humidity, the absorption rate of sulfur dioxide by the forest will increase with the vigorous physiological activity of the forest. The relative humidity is above 85%, and the forest absorbs sulfur dioxide 5 10 times faster than the relative humidity of 15%.

2. It has a natural epidemic prevention effect, and trees can secrete fungicide with strong lethality, killing germs and microorganisms in the air, and has a certain health care effect on human beings. The amount of bacteria per cubic metre of air in different environments has been measured: 1,000 in crowded parks, 340,000 in downtown streets, and only 55 in forested areas.

In addition, the amount of fungicide secreted by trees is also considerable. For example, one hectare of juniper can secrete 30 kilograms of fungicide per day, which can kill germs such as diphtheria, tuberculosis, and dysentery.

3. Natural oxygen plant, oxygen is the basic condition for human ingenuity to maintain life, the human body has to breathe oxygen and discharge carbon dioxide at all times. It is common knowledge that a healthy person who does not eat or drink for three or two days will not be fatal, but a short few minutes of lack of oxygen will die. It is recorded in the literature that in order for a person to survive, he needs to inhale kilograms of oxygen every day, and filial piety residue excretes kilograms of carbon dioxide.

Areas where tropical rainforests are distributed have high annual rainfall, usually above 1,800 mm and in some places as much as 3,500 mm. The rainfall is evenly distributed throughout the year, and it is humid all year round, and the relative humidity of the air is more than 95%. The average precipitation is more than 2032 mm per year, which is more than the annual evaporation.

There is no significant seasonal variation, with temperatures generally around 30 during the day and about 20 at night.

The topography of the rainforest region is complex and varied, from lowland plains with rocky hills to highland canyons with streams. The landscape creates a rainforest landscape with many forms. In the forest, quiet ponds, rushing streams, and cascading waterfalls are everywhere; Towering trees, tangled vines, and lush flowers and plants are intertwined into a green labyrinth.

The early rainforest is the richest region on Earth for its fauna. The abundant plant species provide food and habitat for a wide variety of animals. Tropical rainforests can provide a large amount of timber, precious economic plants, can maintain a lot of biodiversity, and play an important role in maintaining ecological balance and preventing environmental degradation.

However, tropical rainforests are rich in rainfall, poor soils, and highly competitive among species, and when forests are destroyed, they can cause soil erosion, leading to environmental degradation and making it difficult to recover. Therefore, the protection of tropical rainforests is urgent, and has long become an important issue of general concern to all countries in the world.