Ecological Succession
Ecological Succession: Overview
This topic covers concepts, such as, Ecological Succession, Primary Succession, Secondary Succession, Xerarch Succession & Hydrarch Succession etc.
Important Questions on Ecological Succession
Arrange the following communities in the order of their appearances:
Seral, pioneer, climax
In a bare rock which one of the following organisms first colonise _____.
A violent volcanic eruption wiped out most of the life forms in an island. Over different forms of simple organisms colonised this region, followed by the emergence of other organisms such as shrubs, woody plants, invertebrates and mammals. This ecological process is referred to as
One of the following statements is not true with reference to a successive seral stages.
Choose the correct statements.
A) Developing a carbon tax system will help in prevention of global warming.
B) Biome is the major ecological community consisting of all ecosystems.
C) Primary succession in water starts with planktons free floating angiosperms, rooted hydrophytes sedges, grasses and finally trees as forest.
D) Eugen Warming classified plant communities.
Identify the incorrect statement regarding ecological succession:
1. Primary succession takes longer than secondary succession.
2. Both hydrarch and xerarch successions proceed to a similar climax community.
3. Pioneers in secondary hydrarch succession are invariably phytoplankton.
4. As succession proceeds the number and type of animals and decomposers change due to change in the vegetation.
Of the following statements which ones apply for a climax ecosystem?
i. More organic matter occurs as dead than live organisms
ii. Production to community respiration ratio is 1:1
iii. There is maximum niche specialization and minimum niche separation
iv. There are many large and long lived individuals
The nature of climax community depends upon
The entire sequence of communities that successively change in a given area are called
Secondary succession begins in areas where natural biotic communities have been destroyed due to
Which of the following is/are correct with regard to ecological succession.
(A) An important characteristic of all communities is that composition & structure constantly change in response to the changing environment conditions.
(B) This change is orderly and sequential, parallel with the changes in the physical environment
(C) These changes lead finally to a community that is called climax community.
(D) The species that invade a bare area are called climax community.
The sequence of communities of primary succession in water is
During the process of ecological succession, the changes that take place in communities are
Succession in a forest ecosystem is characterized by changes in species diversity, biomass, and net primary productivity as shown in the graph below. Identify curves and
Select the correct statement regarding A, B, C, D, E and F.
The characters that gets changed when ecological succession happens is
(a) Energy use efficiency
(b) Nutrient conservation
(c) Complexity of food web
(d) Species diversity
Which of the following statements is untrue regarding ecological succession?
