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MCQ on Ecological Succession

This article has 8 Multiple choice questions on the topic of Ecological succession.

Ecological succession – the change in the habitat or ecosystem is known as ecological succession. These changes occur so the weaker species are eliminated and strongest prevail

  1. Which of these refers to the ecological succession on sand? 

  1. Xerosere

  2. Psammosere

  3. hydrosere

  4. halosere

Answer: B. Psammosere. A Psammosere is a seral community, a type of biological succession that started on freshly exposed coastal sand. Sand dune systems are the most prevalent Psammosere. When plants colonize bare sand, primary succession can occur. Sand dunes form over time as the sand accumulates, increasing the terrain above sea level. A Psammosere is a type of succession in sand dunes.

  1. In ecological succession, the intermediate developmental phase is known by what name?

  1. ecesis

  2. climax

  3. nudation

  4. sere

Answer: D Sere, A seral community is an intermediate stage in an ecosystem’s ecological succession on its way to its climax community. Often, more than one seral stage develops before climax conditions are reached. Each set of plants in the succession is referred to as a seral community. The plant communities that inhabit a place that has never been vegetated are referred to as primary succession. The pioneer community is another name for this group. In a seral community, computer modeling is sometimes employed to estimate anticipated succession phases.

  1. Which of these about ecological succession is incorrect?

  1. food chain relationships become more complex

  2. species diversity increases as succession proceeds

  3. role of decomposers becomes all the more important

  4. is a random process

Answer: D it is a random process, The process through which the mix of species and environment in a given region changes over time is known as ecological succession. These communities gradually supplant one another until a “climax community” emerges, such as a mature forest, or until a disruption, such as a fire, happens. In ecology, ecological succession is a basic concept.

  1. Which of the following orders of basic processes are involved in succession ?

  1. invasion -> stabilisation -> completion and coaction -> reaction -> nudation

  2. nudation -> stabilisation -> completion and coaction -> invasion -> reaction

  3. invasion -> nudation -> completion and coaction -> reaction -> stabilisation

  4. nudation -> invasion -> completion and coaction -> reaction -> stabilisation

Answer: D nudation -> invasion -> completion and coaction -> reaction -> stabilisation. Nudation: Succession begins with the development of an exposed spot known as Nudation (disturbance). The emergence of propagules is alluded to by the term “relocation. Ecesis is a term that refers to the foundation and early stages of vegetative development. Rivalry emerges when vegetation settles, matures, and spreads, and diverse species compete for space, light, and nutrients. Autogenic processes, such as the creation of humus, impact the living area during this stage, and one plant network replaces another. Adjustment: stable peak network architecture, as far as anybody knows.

Primary progression refers to successional features that begin with the colonisation of an area that hasn’t been recently impacted by an environmental network, such as freshly uncovered stone or sand surfaces, magma streams, recently revealed frozen tills, and so on. Pioneer microbes, plants (lichens and greeneries), the lush stage, smaller bushes, and trees are among the stages of important evolution. When there is food available to consume, creatures begin to regenerate. It has reached the peak network stage when it has become a fully functional working environment.

Auxiliary progression refers to aspects that emerge after an extremely disturbing effect or the expulsion of a preceding network. Pre-unsettling influence conditions have a significant impact on elements in the auxiliary progression, such as soil improvement, seed banks, remaining natural problems, and leftover living life forms. Network change in the early stages of optional evolution might be rather quick due to residual fruitfulness and prior animals.

  1. What is the name of the word for all living creatures that occupy an area that is experiencing primary succession in its early stages?

  1. Climax community

  2. Settled community

  3. Dense community

  4. Pioneer community

Answer: D Pioneer community, Smaller species, such as bacteria and fungi, are frequently the first to arrive when succession occurs in a given region. The pioneer community is made up of the earliest creatures to occupy a region. Biological succession occurs as a result of these pioneer colonies.

The pioneer community refers to the early settlers. Lichens, mosses, ferns, and microbes are examples of creatures with minimal nutritional needs. They crack the worn rock surface as they colonise, which aids in the formation of the initial thin layer of soil.

  1. What is the name of the process in which older plant and animal communities are replaced by younger ones?

  1. Primary succession

  2.  Secondary succession

  3. Nitrogen fixation

  4.  Oxidation

Answer: B Secondary succession, Secondary succession refers to an ecosystem’s ability to regenerate after everything else has been destroyed. The lava within a volcano causes damage to plant and tree life in the region where it erupts. If the ground damaged by a volcanic eruption is not covered with fresh volcanic rock, soil roots and plant parts can regenerate.

  1. Which of the following successions is represented by soil changes due to erosion?

  1. Allogenic succession

  2.  Autogenic succession

  3.  Computational succession

  4. Emigrational succession

Answer: A Allogenic succession, Succession driven by the abiotic components of an ecosystem is known as allogenic succession. In contrast, autogenic succession is driven by the biotic components of the ecosystem. Allogenic succession happens on a time scale that is proportionate with the disturbance.

8. What is meant by succession driven by the biotic components of an ecosystem?

  1. Allogenic succession

  2. Autogenic succession

  3. Computational succession

  4. Migration succession

Answer: B Autogenic succession, They produce succession in autogenic succession plants by capturing light through leaves, producing detritus, and fixing nitrogen. Although the processes of autogenic succession have long been discussed, the importance of living things in affecting the path of succession was recognized early on. The concept of succession is most often associated with communities of vegetation and forests, though it is applicable to a broader range of ecosystems. In contrast, allogenic succession is driven by the abiotic components of the ecosystem.