What is the difference between primary succession and secondary succession?

<> Primary succession: The succession that takes place on the original bare land or the original wasteland is called primary succession, also known as primary succession. Primary succession can occur in both water and terrestrial environments.

Secondary succession: The succession that occurs after most of the original plant communities have disappeared due to fires, floods, cliff avalanches, wind disasters, human activities, etc. Occurs by the regrowth of roots, seeds, etc., that have entered or remained elsewhere.

It can be thought that it appeared in the middle of the development of the primary succession series. This gradual succession is called a subsere. To put it simply, primary succession is the succession of vegetation groups from a clearing with no living organisms, while secondary succession is the succession of vegetation from an open space with a certain number of plant bodies.

There was no living thing in the primary succession, and there was no living thing in the secondary succession, but after some reason, it was abandoned or redeveloped after a disaster.

The difference between primary succession and secondary succession is that there is no similarity in the occurrence of divine deeds, different starting conditions, and different development changes.

First, it happens differently.

1. Primary succession: Primary succession occurs on the original bare ground where there has never been biological growth or although there has been biological growth, it has been completely wiped out.

2. Secondary succession: secondary succession occurs on the secondary bare land where a community is disturbed by floods, fires or human activities, and the vegetation in the community is seriously damaged.

Second, the starting conditions are different.

1. Primary succession: The vegetation of primary succession is destroyed, and the original soil conditions do not exist.

2. Secondary succession: The vegetation of the secondary succession is destroyed, but the original soil conditions are basically retained.

Third, the development and change are different.

1. Primary succession: Organisms of primary succession start to develop and change from the lowest level.

2. Secondary succession: The organisms of secondary succession start to develop and change from the lower level, and retain the seeds or other propagules of plants.

The main differences between primary and secondary succession are:The starting conditions are different

According to the definition of primary succession and secondary succession, primary succession refers to the succession that occurs in a ground where there has never been a clump but is covered by vegetation, or where vegetation has previously existed but has been completely wiped out.

Secondary succession refers to the succession that occurs in places where the original vegetation no longer exists, but the original soil conditions of Kai Zhengmin are basically preserved, and even plant seeds or other propagules are retained. It can be seen that the difference between the two is mainly manifested in the fact that the starting conditions are not the same.

The speed and tendency of secondary succession

1. The speed of succession. In most of the secondary bare land, the soil conditions of the original community are still preserved, and even the propagules of some plants in the original community are still preserved. There may also be unspoiled communities in the vicinity of bare land.

In short, it has certain soil conditions and seeds. Therefore, the succession rate is generally faster at each stage in the secondary succession series.

2. Succession tendency. In general, when the effect on the secondary plant community is stopped, the succession of the secondary plant community still tends to return to the type of the original community before the destruction.

Answer B According to the definition of primary and secondary succession: primary succession is the succession that occurs in a ground that has never been covered by vegetation, or in a place where vegetation used to exist but has been completely wiped out. Secondary succession refers to the succession that occurs in places where the original vegetation no longer exists, but the original soil conditions are basically preserved, and even the seeds or other propagules of plants are retained.

It can be seen that the difference between the two is mainly manifested in the different starting conditions. View the original post

The main difference between the two is the starting conditions.

Expand your knowledge:Primary succession: refers to the succession of a ground that has never been covered by plants, or a place where vegetation originally existed but has been completely wiped out.

Secondary succession: It refers to the succession that occurs in places where the original vegetation no longer exists, but the original soil conditions are basically preserved or even the seeds or other propagules of plants are retained.

The primary succession takes longer and the speed is slower than the secondary succession, and the influencing factors of the secondary succession are human activities, while the influencing factors of the primary succession are natural elements.