The ecological role of light intensity and the adaptation of organisms are briefly described

The intensity of light and chicken manure has an important impact on the growth and morphogenesis of organisms. Different plants respond differently to light intensity, forming two ecological types: positive plants and negative plants.

According to the adaptation of plants to different light intensity, plants can generally be divided into three categories:

(1) Sunny plants(2) Shade plantsShade plants (sciophytes) are plants that grow better in low light conditions than in bright light. Weak light is relative to the light intensity of the plants in the sun, not the weaker the light intensity, the better, if the light is too weak to reach the light compensation point of the plants in the shade, they will not be able to grow normally. In general, shady plants can grow and develop normally at 1 50 years of full light, and their optimal light intensity for photosynthesis is lower than that of full sunlight.

Plants in the shade mostly grow in moist, shady places or in dense forests. For example, the ferns under the forest judge Lao Zheng plants, bryophytes, and even money grass, as well as hemlock, yew, ginseng, three.

Seven, Banxia, etc.

(3) Shade-tolerant plantsShade-tolerant plants are plants that fall somewhere in between. This type of plant has a wide adaptability to light intensity, but grows best under the sunshine of Quanhanling. The minimum amount of light they require is approximately equal to 1 15 1 6 of full illumination.

Generally, the strength of shade tolerance varies according to the nutrient conditions, temperature and water status of the soil. For example, wheat winter, polygonatum bamboo, spruce, codonopsis, cinchona and so on are shade-tolerant plants.

Answer: Choose A.

Among the various life phenomena listed below, moths are adapted to changes in light intensity.

1) Sufficient light can effectively promote plant photosynthesis, promote the growth of cells = large and differentiation of tissues and organs, developed mechanical tissue, good root development, and increased chlorophyll content; Lack of light can have an inhibiting effect on growth, such as yellowing. At the same time, insufficient light reduces the synthesis and accumulation of photosynthetic products in the body, which affects development. In the young fruiting stage, insufficient light can cause poor fruit setting or fruit drop.

Sufficient light is conducive to the increase of sugar content and anthocyanins in fruits, and improves the quality of fruits.

2) Since light intensity is very important for plant growth and development, morphogenesis, etc., plants have formed different ecotypes in the long-term adaptation process, such as positive plants, negative plants, shade-tolerant plants, etc. During the growth and development of these plants, they have different requirements for light intensity. Students often do not think comprehensively about this kind of problem.

Therefore, when it comes to the relationship between environmental factors and plants, it is necessary to know the influence of environmental factors on the growth and development of plants, and also to consider the ecological adaptability of plants.

1. Briefly describe the ecological role of light quality.

2. Briefly describe the ecological role of light quality and the adaptation of organisms.

3. Discuss the ecological role of light quality.

4. Briefly describe the light quality and light intensity.

ecological role.

5. The ecological role of light quality and the adaptation of organisms.

6. What is light quality in ecology?

1.Sunlight.

by infrared light, visible light.

and ultraviolet light, different light quality has different effects on organisms.

2.Photosynthesis.

The spectral range is only in the visible region.

3.Infrared light mainly causes thermal changes.

4.Ultraviolet light mainly promotes vitamin D

formation and bactericidal effect, etc.

5.Visible light also has an effect on biological reproduction, body color changes, migration, hairiness replacement, growth, development, etc.

6.The effect of ambient light factors on organisms and the adaptation of organisms to ambient light conditions.

7.Light provides plants with the energy they need for photosynthesis, controls their growth, development, and distribution, determines the composition of plant communities, and affects the survival, activity, and distribution of animals.

8.Light is the main information that organisms use to detect seasonal changes in the environment and produce corresponding responses.

9.This is the light ecology.