"The Biosphere is the Largest Ecosystem" Understanding the Biosphere PPT Courseware 4

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"The Biosphere is the Largest Ecosystem" Understanding the Biosphere PPT Courseware 4

1. Diverse Ecosystems

forest ecosystem

Distribution: Humid or relatively humid places.

Features: There are many kinds of animals and plants in a stable state.

Plants: Mainly trees, with a small amount of shrubs and herbs.

Animals: Since it is easy to find abundant food and habitat in trees, there are many types of arboreal and climbing life.

Functions: 1. Provide humans with a large amount of wood and forestry by-products 2. Improve the ecological environment

grassland ecosystem

Distribution: Arid areas with little annual rainfall.

Features: There are few types of animals and plants. In different seasons or years, the rainfall is uneven, and the number and types of animals and plants will change drastically.

Plants: Mainly herbs, a few shrubs, and very few trees.

Animals: In order to adapt to grassland life, most animals have the characteristics of digging holes and running fast.

Function: 1. The animal husbandry industry is developed, providing people with a large amount of meat, milk and fur.

2. Regulate the climate and prevent the land from being eroded by wind and sand.

Characteristics of various ecosystems

Forest ecosystem: distributed in humid areas with a wide variety of animals and plants. Forests play an important role in conserving water sources and maintaining soil and water, and are known as "green reservoirs".

Grassland ecosystem: Distributed in arid areas, where there is very little annual rainfall, there is a lack of tall plants, and there are fewer species of animals and plants than in forest ecosystems.

Marine ecosystem: consists of oceans and marine life. Most of the plants in the ocean are tiny phytoplankton; there are many kinds of animals, most of which can flow in the water.

Freshwater ecosystem: It consists of freshwater waters such as rivers, lakes or ponds and freshwater organisms.

Wetland ecosystem: An ecosystem formed under watery and over-humid conditions. Swamp plants predominate and there are many types of animals. Wetlands have the functions of purifying water sources, storing floods and fighting droughts.

Farmland ecosystem: It is an artificial ecosystem, with crops as the main body and relatively few species of animals and plants.

Urban ecosystem: Human beings play an important dominant role in urban ecosystem. The variety and quantity of plants are small. The consumers are primarily humans, not wildlife.

2. The biosphere is a unified whole

Analyze the following information.

A river is an ecosystem. Reptiles such as turtles and crocodiles living in the river will crawl to the river bank to lay eggs. The heron eats fish, shrimp, mussels and other animals in the river, but it builds its nest in the big tree by the river. Animals on land sometimes go to the river to drink water.

Sunlight and air are not unique to river ecosystems. Rainfall brings moisture from elsewhere and washes soil from the land into rivers. Wind can also carry distant plant seeds into rivers. River water can be used to irrigate farmland. In some places, people also get their drinking water from rivers.

Discussion: What ecosystems are river ecosystems related to?

Summary: River ecosystems are closely related to many ecosystems. appears in:

1. From the perspective of abiotic factors, sunlight shines on all ecosystems, the atmosphere circulates continuously and regularly, and water and water vapor also move around the world. Earth-wide movement. All ecosystems on Earth are affected by these factors.

2. In terms of regional relationships, various ecosystems are also interrelated. Our mother rivers, the Yellow River and the Yangtze River, originate from the forest ecosystem and grassland ecosystem at their source in the west.

3. From the perspective of organisms in the ecosystem, many tiny organisms, pollen, and seeds can move with the atmosphere and reach different ecosystems. Fish migration, bird migration. Human activities can take living things to different places.

The dangers of special alien invasions

Eupatorium adenophora: also known as liberation grass and destruction grass. Originating from Central America, the whole plant is poisonous, crowds out other plants, harms farmland and animal husbandry, and is known as a plant killer. Since crossing the ocean and arriving in my country, it has grown wildly, destroying a large amount of fertile farmland wherever it goes and causing great harm to agricultural production. There is currently no good prevention and treatment method.

Ragweed: Vicious weed. Native to North America, it inhibits other species and is harmful to human health when it blooms and sheds pollen, causing "hay fever" and "hay fever".

Water hyacinth: native to Brazil, it blocks rivers, pollutes water quality, and harms the environment. Unreasonable introduction of species has caused great harm to my country's aquaculture industry.

in conclusion:

Various ecosystems in the biosphere may seem unrelated to each other due to geographical separation, but in fact they all have certain connections.

The entire biosphere is a whole in structure and function. It is the largest ecosystem on earth.

The biosphere is the common home of all living things. Protecting the biosphere is everyone’s responsibility!

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Update Time: 2024-10-08

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