Energy flow in high school biological ecosystems

1) Because producers can use solar energy, etc., to supplement their energy inputs, other consumers can only compensate for energy input through producers.

2) 5 higher.

4) Due to the impact of disasters, plants were damaged, pandas were underfed, and the formation of mudslide belts cut off the panda migration corridor, making some populations "reproductive islands".

1.In addition to the production, other trophic levels are not able to photosynthesize, cannot synthesize nutrients on their own, and energy decreases in the process of transmission, so energy input must be compensated.

2.The energy from the herbivores to the carnivores is, and the carnivores need to be compensated by the outside world after being consumed in various ways is at least (5). Animals with a higher trophic level will receive greater effects after **.

4.Because of the impact of the disaster, a large number of plants have died, panda food** has decreased, and the number of pandas has decreased.

1. Producers produce energy that cannot meet consumer demand.

2 5 Higher (the top carnivore requires a high compensation input, indicating that the number of carnivores in their food has decreased a lot, and that carnivores have a large impact in a disaster).

4 Food loss directly affects panda populations.

1.The energy is constantly decreasing in the transfer.

2.5 higher.

4.Fewer plants, less food**, less reproduction.

Senior 2 Introduction] The following is a recommended knowledge point about biology in the second year of high school: the energy flow of the ecosystem, if you think it is very good, welcome to comment and share Thank you for reading and supporting!

Nouns: 1. Energy pyramid: The energy values of each trophic level per unit time can be drawn from low to high, so as to form a pyramid figure, which is called an energy pyramid.

Statement: 1. Starting point: starting from the producer fixing the solar energy (input energy).

2. The total amount of solar energy fixed by the producer = the total amount of energy flowing through the ecosystem.

3. Channel: Transmission (transfer of energy) along the trophic level of the food chain

And it can be considered that the energy assimilated by one trophic level = the energy lost by breathing, the energy released by the solver and the energy assimilated by the next trophic level. But the situation is different for trophic levels.

5. Features: Changyan transmission direction: roll-resistant unidirectional flow (energy can only flow from the previous trophic level to the next trophic level, but not the reverse flow);Delivery efficiency:

The transfer efficiency is 10% to 20% (the transfer efficiency of energy between two adjacent trophic levels is only 10% to 20%).

6. The main purpose of studying the energy flow in the ecosystem is to try to adjust the energy flow relationship next to the ecosystem, so that the energy flows to the most beneficial part of human beings.

7. Calculation rules: the shortest food chain and 20% transmission efficiency should be selected for the minimum consumption, and the longest food chain and the minimum delivery efficiency of 10% should be selected for the maximum consumption.

Hello, recently because of some things, I haven't been online for a while, if you delay the answer to the question, I apologize here.

In fact, the problem is quite simple, whether it is told by the teacher or explained in the encyclopedia, there is no problem.

Alienation refers to the oxidation and decomposition of part of its own substances and the discharge of metabolic wastes or the release of energy, but how do these self-substances come about? Obviously, the self-substance comes from assimilation.

For example, the food you eat is only digested and absorbed into your own substance, and then it is metabolized by alienation. Of course, the products of assimilation may not all be decomposed by alienation, but it is obvious that the energy of alienation is necessarily the product of assimilation.

In this case, the energy in the manure is the part of the cow that is excreted before it is absorbed, and it is certainly not counted as the amount of assimilation. The amount of respiration is the energy released by consuming its own energy substances, and these energies are inevitably the products of assimilation, that is, if the respiration volume is 48%, it will inevitably consume 48% of the assimilation products, and it can be seen that assimilation must include the part that is consumed.

I don't know if it's detailed enough.

Life as a whole, the various processes in life cannot be separated.

All kinds of topics about biology, and I hope to work together.

Assimilation refers to the amount of organic matter obtained by the organism. Part of this energy is used by respiration, that is, oxidized and decomposed by dissimilation, another part flows to the next trophic level, and part is stored in the body.

Therefore, the amount of assimilation cannot be equated with assimilation, which is the energy obtained through assimilation, but the purpose of obtaining these organic substances is to carry out dissimilation and decompose these organic substances to release ATP.

In an organism, assimilation and dissimilation should exist simultaneously.

I wonder if I can understand this?

Energy is transferred through the food chain and food web, and solar energy is the energy of all life activities**. It enters the ecosystem through the photosynthesis of green plants and then transfers from green plants to various consumers. The characteristics of energy flow are:

1.One-way flow – energy released into the environment by various parts of the ecosystem through various pathways and can no longer be used by other organisms;

2.Decreasing – The amount of energy fixed by the various parts of the ecosystem is decreasing gradually.

In general, the further you move to the back of the food chain, the fewer the number of organisms, creating a pyramid-shaped trophic hierarchy.

The form of ecosystem energy flow in living organisms.

It is the chemical energy that flows in the form of organic matter.

The energy flow of an ecosystem refers to the process of energy input, energy transfer, and energy loss

1. Energy input: The starting point of energy flow in the ecosystem is the solar energy fixed by the producers (mainly plants) through photosynthesis. The channels through which energy flows are the food chain and the food web.

2. Energy transfer: In the energy flow of the ecosystem, energy changes in the form of solar light energy and chemical energy and thermal energy loss in organic matter in living organisms. Energy flows in the form of chemical energy in organic matter (food) in the trophic levels of the food chain.

3. Energy loss: The main way of energy loss in the energy flow of the ecosystem is through the cellular respiration of the organisms at each trophic level in the food chain and the cellular respiration of the decomposers, which are mainly lost in the form of heat. Hope it helps.

Any ecosystem needs to be constantly replenished with energy from outside the system in order to maintain the normal functioning of the ecosystem.

The structure and function of the ecosystem of the eight biologicals of Beijing Normal University - the material cycle is accompanied by the flow of energy.

Energy utilization, for example, the manure of silkworms can be fed to fish, which improves the utilization rate of energy. If it's not a mulberry fish pond.

If silkworm dung is used to raise fish, the energy in the dung is wasted.

The feces are broken down by microorganisms and lost in the form of heat energy, which is not beneficial to humans.

If it flows into the fish, it can be eaten by humans, which improves the utilization rate of energy.

The energy transfer efficiency is 10 -20, except for the problem of finding the maximum and minimum values, in the exam and calculation, the corresponding value will be given for you to calculate.

We are generally not asked to calculate utilization during the exam because we can't. In multiple-choice questions, we are often asked to distinguish between utilization and delivery efficiency.

High School Biology. Teacher blog, please Liu Qiang. Blog.

Select: Energy.

Less loss improves the efficiency of energy utilization.

B: The decomposer cannot facilitate the return flow of energy.

C: Farm fertilizer can only improve production efficiency and production, and it has nothing to do with energy flow.

D: As can be seen from the figure, following the [material recycling], this practice only improves energy utilization, but does not improve the transfer efficiency.

I know the figure...

b is incorrect, the decomposer cannot facilitate the flow of energy.

The description in the diagram is incorrect.

The total energy input into the ecosystem is the fixed energy and artificial inputs of the producer.

The total energy flowing through the ecosystem is the total energy in the bodies of all producers, consumers, and decomposers in the ecosystem.

There is a difference between the two, the difference is that there is a loss of energy when energy is transferred through the food chain.