Thus, it is the type of succession in which plants and animals recolonize a habitat after a major disturbance like a landslide, lava flow, wildfire, etc. It occurs when a climax community gets destroyed. Secondary succession takes place in an ecosystem where the disturbance did not eliminate all life forms and nutrients from the environment.
Small plants emerge, followed by larger plants at the beginning of the succession. They develop into tall trees that block the sunlight and change the structure of the organisms below the canopy. By the end of all this, the climax community arrives. Mostly insects and weedy plants are the first organisms to recolonize in secondary succession. Gradually more complex and stable species of plants and animals arrive.
Stability in the ecological structure of a biological community is established when the area remains undisturbed for a long period. Primary Succession. Secondary Succession. It is a type of succession that starts from barren or uninhabited land.
It is the type of succession which occurs in a habitat where life existed previously. It occurs in lifeless or barren areas. It occurs in recently denuded or previously inhabited areas. Time to complete. Takes around years, which may be more.
It takes place in 50 to years. Physical Conditions. Conditions are least suitable for the survival of life. Soil is devoid of nutrients or there is no soil at all. As life once existed. There is the presence of soil and may also even some nutrients in the soil. Email address: Your name:. Possible Answers: None of these. Correct answer: An environment lacking plant and animal life.
Explanation : Primary succession is the colonizing of a new environment that lacks organisms and plant life. Report an Error. Which of the following best describes when secondary succession occurs? Possible Answers: A previously inhabited environment. Correct answer: A previously inhabited environment.
Explanation : Secondary succession can be described as the colonization of a habitat that once supported plant and animal life but was abandoned due to ecological disturbance. Possible Answers: Secondary succession. Pioneering succession. Primary succession. Correct answer: Secondary succession. Explanation : Primary succession occurs in an environment without previous life, or a barren habitat.
Possible Answers: Lichen. Oak trees. Pine trees. Correct answer: Lichen. Possible Answers: In an environment recently burned by a wildfire. Correct answer: On a newly created volcanic island. Possible Answers: During the summer. Correct answer: Near early stages of succession. Explanation : Pioneer species are the first species to colonize an environment, and thus would be found in the early stages of succession. Possible Answers: Lava flow.
Correct answer: Lava flow. Possible Answers: keystone species. Correct answer: pioneer species. Explanation : The first species to inhabit an area that has been disrupted are called pioneer species. Copyright Notice. View AP Biology Tutors. Jeffrey Certified Tutor. It gets develops from the migrants and previous occupants. Favorable environment In the beginning, the environment is unfavorable. The environment is favorable, since the beginning. Reproductive structure Absent of any previous community.
Present of the previous community use to live in that area. Primary Succession is the initial stage of the development of any community. As it starts growing from the area where there is no suitable condition for sustaining life. Gradually the advancement goes on, from the barren area, rocks and non-vegetative fields to the expansion of the developed community.
The evolution is so slow that it takes thousands of years to build such area. Primary Succession is the first life form to appear in any environment, whether it is a terrestrial, marine or fresh water.
In this case, there is no previous living material present. And the organisms which establish themselves in the initial stage are called the primary colonizers or pioneer and community of that species is called primary community. Lichens and algae are the typical examples of this succession.
The community that existed previously, but has been removed due to the natural disturbances. Even the land still marks the presence of the essential nutrition, which is required by all forms of life to grow.
This kind of succession occurs in the forest, which has been cut recently, plowing fields, flooded lands and the area which were destroyed due to natural calamities. Thus it can be said that Secondary Succession occurs when the land of primary succession get disturbed, due to some biological cause or internal factors. Given below are the substantial points, for distinguishing between both kind of ecological succession:.
0コメント