What is ecological succession? Primary succession?

Secondary succession?

What is a pioneer species?

Question:

1. What is ecological succession?

2. Primary succession?

3. Secondary succession?

4. What is a pioneer species?

(these questions worth more than 10 points)

1.

The process that describes how the structure of a biological community

2.

Ecological succession that begins in essentially lifeless areas

3.

When the severity of disturbance is insufficient to remove all the existing vegetation and soil from a site

4.

Species that arrive first in a newly created environment

Explanation:

1.

Ecological succession is the process that describes how the structure of a biological community (that is, an interacting group of various species in a desert, forest, grassland, marine environment, and so on) changes over time. ... The structure of this community becomes more complex as new species arrive on the scene.

2.

Primary succession is an ecological succession that begins in essentially lifeless areas, such as regions in which there is no soil or where the soil is incapable of sustaining life (because of recent lava flows, newly formed sand dunes, or rocks left from a retreating glacier).

3.

Secondary succession occurs when the severity of disturbance is insufficient to remove all the existing vegetation and soil from a site. Many different kinds of disturbances, such as fire, flooding, windstorms, and human activities (e.g., logging of forests) can initiate secondary succession.

4.

Species that arrive first in a newly created environment (such as an island rising out of the sea) are called pioneer species, and they, through their interactions with one another, build a rather simple initial biological community.

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thymine. in rna, thymine is replace by uracil

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