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
Name the the process that describes how the structure of a biological community over time, whether it is ecological succession or ecological pollution.
What are the changes that occur to reach a climax community?
Fill in the blank with the correct word given in the bracket.
The species that invade the bare area are termed as _____ (endemic/pioneer) species.
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.
Name the pioneer community in lithosere. (Blue-green algae/Lichen/ Fungi)
The final and more or less stable community in the biotic succession is called, whether it is Seral community or Climax community.
The ecological succession taking place in dry area is xerarch.
From algae to forest, explain in relation with the succession.
How many of the following changes occur during ecological succession?
(a) Increase in species diversity
(b) Increase in structural complexity
(c) Decrease in humus content of soil
(d) Niche becomes specific and narrower
(e) Less immobilisation of nutrients
Which of the following forms the pioneer community in hydrarch succession?
Consider the following statements and select the correct option that fills in the blanks.
I. A ......... food chain begins with dead organic matter.
II. In xerarch succession the series progress from ................ conditions.
III. Breaking down of detritus into small particles by earthworm is called .........
During an ecological succession, many changes occur. Select the wrong statement with respect to succession.
(i) Some species colonise and some species disappear
(ii) Diversity will not change during succession.
(iii) The total biomass increases.
(iv) The species number increases.
Which of the following is not true about succession?
Which of the following forms the pioneer community in hydrarch succession?
