The problem of university ecology is advanced by the masters!

1.False: Completely-Not quite.

2.False Higher.

3.The creators and builders of the community are called the building species.

4.False accumulation period - stable period.

5.The plant communities with the same or similar life forms and the same ecological relationship to temperature and water conditions are combined into vegetation types.

6.False: Swap the two.

7.False k-countermeasures.

8.False: Reproduction-growth.

9.False: Swap the two.

10.False does not exist - exists.

Damn, it's all wrong.

ps What university are you in?

The process of community formation can be simply divided into three stages:

1. Open or pioneer community stage.

Although only a few individuals of these species can survive and reproduce at the beginning, or only a small part survive in the habitat, this initial established population has played an extremely important role in laying the foundation for the subsequent environmental transformation and subsequent invasion and settlement of the same or heterogeneous individuals.

2. The stage of unstable canopy closure.

With the development of the community, the population increases, and when there is a certain number of species, the living area is gradually improved.

The utilization of resources has gradually changed from imperfect to fully utilized. Thus, at this stage, there is intense competition between species, with some species settling down and being given the opportunity to reproduce, while others are rejected. At the same time, species that make full use of natural resources and survive in competition between species have developed, using and sharing resources from different perspectives.

Through competition, relative equilibrium is gradually reached.

3. The stage of canopy stabilization.

Species enter into coordinated evolution through competition and balance, so that the use of resources is more adequate and effective. Sometimes, some coexisting species may be added to make the community structure more perfect, so that the community can develop into a top pole community consistent with the local climate, and the community has a relatively fixed species composition and number ratio, and the community structure is more complex.

1.False There is also natural selection and segregation.

2.False is generally higher than a single group.

3.The staggered species are the best among the dominant species, that is, the plant species with the largest coverage (the largest weight) and the largest abundance. The building species is the creator and builder of the community.

Plant species that have obvious control over the structure of the community and the formation of the community environment are called dominant species.

4.False Stabilization period.

5.False Vegetation type is the main high-level unit of vegetation classification. It is formed by the combination of plant communities with the same or similar life forms of the building species and the same ecological relationship to temperature and water conditions.

6.False: Biomass and energy swapped (biomass inverted, such as phytoplankton in marine ecosystems).

7.The mistake is that the k-countermeasure niche is generally narrow.

8.Wrong growth.

9.Wrong: Swap back and forth.

10.False: Non-existent becomes existing.

The main research issues of ecology are described as follows:

Ecology is the science that studies the interrelationships between organisms and their surroundings.

The survival, activity, and reproduction of living organisms require a certain amount of space, matter, and energy. In the process of long-term evolution, organisms gradually develop special needs for certain physical conditions and chemical components of the surrounding environment, such as air, light, moisture, heat and inorganic salts. The material and energy required by various organisms and the physical and chemical conditions to which they adapt are different, and this characteristic is called the ecological characteristics of the species.

The survival of any organism is not isolated: there is mutual assistance and competition between individuals of the same species; There is also a complex relationship between plants, animals and microorganisms. Human beings are constantly transforming the environment to meet their own needs, and the environment in turn affects human beings.

With the expansion and diversification of human activities, the relationship between human beings and the environment is becoming more and more prominent. Therefore, the scope of modern ecological research has expanded to include complex systems of various types of ecosystems, including human society, in addition to biological individuals, populations and biological communities. The source of population and capital collapse faced by mankind.

Several major issues, such as the environment, are the research content of ecology.

But classification is not the goal, ecology is mainly to solve the relationship between organisms and the environment, such as the study of the changes of various organisms themselves, the study of the absorption and purification of organisms to the environment, the study of organisms to the environment adaptation and evolution, etc., which is also the reason for the vigorous development of the national ecological collar air tour area.

1. It's not that you can do whatever you want, it mainly depends on what you do with the boss, and some bosses have to do the project even if it has nothing to do with the ecology. What you want to do is a river, or the Loess Plateau or something, that's what hydraulics or environmental science does, and there's a big gap between doing it and doing it.

2. Whatever you choose is the same, the reason is 1, with the boss, the boss will also follow the project, which project has money to earn, and which one will be done. However, plants and animals still score a little, and my personal opinion is that there is basically no future for learning plants, and it may be a little more high-tech to do animals, and if it is changed to bioengineering, it is possible to do genes, or it may be made into biomedicine.

3. The production is much better, the technology is strong, and it is useful to go out, but the pure ecology is basically useless.

4. Wuhan Institute of Biology, Chinese Academy of Sciences, or West China Biotech, Sichuan University, I only know these two.

5. I don't have to do the exam, just do English and mathematics, but don't say that I can't pass politics.

At present, I am personally doing a postdoctoral fellow in ecology, which is basically not interesting, I suggest you don't choose this, technology first, pure ecology is a flicker.

Good luck.

Whether in the south or in the north, it is best to grow on the southern slope, how can it be that the northern slope is the southern boundary, and does the southern slope of the south not grow trees? So d is wrong upside down.

The correct expression is that in the distribution area of tree species, the southern slope is the southern boundary of the northern tree species, and the northern slope is the northern boundary of the southern tree species.

It should be "the southern slope is the lower limit of the northern tree species, and the southern slope is the upper boundary of the northern tree species", I personally think.

Simple thinking. In the distribution area of a tree species, if there is a mountain now, can this tree species grow only one side and not the other? Hillsides are generally not the dividing line for the distribution of tree species.

In the distribution area of tree species, there is no clear distinction between northern and southern tree species, and there is no boundary, such as the plant distribution of Mount Kilimanjaro.

The southern slope is the southern boundary of the northern tree species, and the northern slope is the northern boundary of the southern slope tree species.

It's d, it seems to be wrong, and the reverse is.

I think that the northern species and the southern species should be changed to the masculine species and the feminine species.

Studying ecology, the employment situation of undergraduates is not optimistic, because ecology is a theoretical science, it is not as simple as technical or engineering science, and you can work immediately after graduating from undergraduate; Ecology is an emerging discipline of basic theoretical science, which is very popular abroad, but it is still very weak in China.

Therefore, there are almost no counterpart enterprises after graduating from the bachelor's degree, such as gardening, greening, environmental protection or environmental impact assessment companies, etc., of which the latter two, you also need to obtain a practicing license, provided that the working experience, that is to say, it is difficult for you to get a high-income salary in the first 5 years of undergraduate graduation.

Choosing a major in ecology requires systematic learning, you need to continuously improve and take the path of scientific research, which is the best direction for you to choose this major, then you need to obtain a master's degree or doctorate, and then go abroad for further study, which is the only way for you. If you think that you are not suitable for scientific research, then you should give up this major and choose a major that is better to find a job nowadays, such as electronic engineering, finance, business administration, etc.

1) The total amount of energy fixed by forest ecosystems is very large, usually larger than other ecosystems, comparable to wetlands (including shallow seas and some coral reefs).

2) the structure of energy flow in forest ecosystems is complex;

It could not be concluded that the BAI species preferred the DU habitat conditions of the community. zhi because, in a community DAO ecosystem edition.

, community membership types can be divided into:

Dominant species and colony species, sub-dominant species, associated species and rare or occasional species. The status and role of different community members in the community are different. From this principle, you can conclude that your conclusions may not be true.

To give a simple example, if the species is an occasional species in a community, then it may be a relict or an alien species, and its presence here alone does not indicate whether it is a relict or alien species. It is not possible to say whether it is dependent on the habitat conditions of the community.

The living conditions of living organisms can only judge that organisms are likely to survive in this environment. But if the environment is not within the living conditions of the organism, then there must be no such organism.

Harbin has the potential to become a temperate rainforest with precipitation of up to 2,000 millimeters, and the local latitude is the same as that of the temperate rainforest in the Pacific region of North America. If 500 millimeters of precipitation falls in Guangzhou, it may become a Mediterranean-like climate and develop into an evergreen leafy forest.

1、。3、d。(The answer is not necessarily standard).

1. Photosynthesis of plants.

The raw materials used are carbon dioxide and water, which can increase the carbon dioxide concentration if there is not enough light.

2. The area of the cold zone is relatively small, so the distribution of alpine grassland is small.

3. Modern ecology is biased towards the microscopic direction, and molecular ecology and the like may need mathematical linear methods to study.