Home
Class 12
BIOLOGY
During an ecological succession, many ch...

During an ecological succession, many changes occur. Select the wrong statement with respect to succession.
(i) Some species form colonies and some species disappear
(ii) Diversity will not change during succession.
(iii) The total biomass increases .
(iv) The species number increases.

A

(i) and (ii)

B

only (iii)

C

only (ii)

D

(iii) and (i)

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding ecological succession, we need to analyze each of the provided statements and determine which one is incorrect. Here’s a step-by-step breakdown: ### Step 1: Understand Ecological Succession Ecological succession is a gradual process through which ecosystems change and develop over time. It involves a series of stages where different communities of organisms replace one another, leading to a stable climax community. ### Step 2: Analyze Each Statement 1. **Statement (i): Some species form colonies and some species disappear.** - This statement is **correct**. During succession, certain species may thrive and form colonies, while others may not adapt to the changing environment and thus disappear. 2. **Statement (ii): Diversity will not change during succession.** - This statement is **incorrect**. Diversity typically increases during succession as new species colonize the area and adapt to the changing conditions. Therefore, diversity does change. 3. **Statement (iii): The total biomass increases.** - This statement is **correct**. As more species establish themselves and the ecosystem matures, the total biomass generally increases due to the greater number of organisms and their interactions. 4. **Statement (iv): The species number increases.** - This statement is **correct**. As succession progresses, the number of species typically increases until the climax community is reached. ### Step 3: Identify the Wrong Statement From the analysis, we can conclude that the wrong statement with respect to succession is: - **(ii) Diversity will not change during succession.** ### Final Answer The wrong statement is **(ii) Diversity will not change during succession.** ---
Promotional Banner

Similar Questions

Explore conceptually related problems

Ecological succession is _______and _________change in species compostion.

What changes occur during ecological succession?

Select the wrong statements with respect to DNA . (i) The backbone of DNA is formed by the sugar-phosphate chain. (ii) The two strands of the Polynucleotide are anti-parallel. (iii) The nitrogen bases are parallel to the backbone . (iv) The backbone contains a hydrogen bond.

which of the following ecological characteristics undergo change during succession? (a) Humus content of soil (b) total biomass (c) number of species (d) temperature

A: Niche become general and broader during biotic succession. R: Species diversity increases but organic matter is decreased.

Assertion: During an ecological succession, the number of species increases, the community biomass increases and the community's ratio of respiration to photosynthesis also increases.

Match the following and select the correct option. (a) Earthworm (b) Succession (c) Ecosysem service (d) Population growth (i) Pioneer species (ii) Detrivore (iii) Natality (iv) Pollination

Choose how many of the given statement are not correct about the Tropics ? (i) Greater species diversity compared to Temperate (ii) Subjected to frequent glaciations in the past (iii) Great seasonal variations are seen here (iv) Enviornment is relatively constant

Write whether the following statements are true or false . (i) Communities with more species tend to be more stable that those with less species. (ii) David Tilman found that plots with less species showed less year-to-year variation in total biomass. (iii) A stable community must be resistant to invasions by exotic species. (iv) Effect of reduction in diversity has been explained by Alexander von Humboldt through rivet popper hypothesis.

Read the following statements w.r.t predation and select the two wrong statement (i) Predators help in maintaining species diversity in a community. (ii) Predators in nature are prudent . (iii) Predators cannot reduce the intensity of competition among competing prey species . (iv) Predators do not act as conduits for energy transfer across trophic levels .