Which of the following attributes indicate stability in a biological community? 1. Inability to recover from occasional disturbances 2. Low inter-annual variation in productivity 3. High susceptibility to invasive alien species Select the correct answer using the code given below:

Correct Option The correct option is 2 only Explanation 1 only stable biological community is characterized by its ability to maintain equilibrium despite environmental fluctuations. According to ecological principles, particularly those highlighted by David Tilman’s long-term ecosystem experiments, stability is linked to consistency in productivity, resilience to disturbances, and resistance to invasions. Statement-wise Analysis - Statement 1 is Incorrect: 1 only stable community should not show too much variation in productivity from year to year. Low inter-annual variation in biomass or productivity indicates that the ecosystem functions are consistent and reliable over time. - Statement 2 is Correct: Stability implies resilience. 1 only stable community must be either resistant to occasional disturbances (natural or man-made) or resilient enough to recover after such disturbances. An inability to recover indicates instability. - Statement 3 is Incorrect: 1 only stable community is characterized by its resistance to invasions by alien or exotic species. High susceptibility to such invasions suggests that the community lacks the robustness or niche occupation required to prevent new species from disrupting the existing balance. Key Takeaway Key Takeaway: The three main attributes of a stable biological community are constant productivity (low variation), resilience (recovery from disturbance), and resistance to invasive species.

Which of the following attributes indicate… - NCERT Class 12 Environment & Ecology MCQ

NCERT Class 12 Environment & Ecology — Chapter 2: Biodiversity and Conservation

mcqmedium

Which of the following attributes indicate stability in a biological community?

Inability to recover from occasional disturbances
Low inter-annual variation in productivity
High susceptibility to invasive alien species

Select the correct answer using the code given below:

NCERT textbook question

From NCERT Biology (Chapter 12 & 13) · Page 6

Options

A1 only
B1, 2 and 3
C1 and 3 only
D2 only

Did you get this right?

Solution

Correct Option

The correct option is

2 only

Explanation

1 only

stable biological community is characterized by its ability to maintain equilibrium despite environmental fluctuations. According to ecological principles, particularly those highlighted by David Tilman’s long-term ecosystem experiments, stability is linked to consistency in productivity, resilience to disturbances, and resistance to invasions.

Statement-wise Analysis

Statement 1 is Incorrect:
1 only
stable community should not show too much variation in productivity from year to year. Low inter-annual variation in biomass or productivity indicates that the ecosystem functions are consistent and reliable over time.
Statement 2 is Correct: Stability implies resilience.
1 only
stable community must be either resistant to occasional disturbances (natural or man-made) or resilient enough to recover after such disturbances. An inability to recover indicates instability.
Statement 3 is Incorrect:
1 only
stable community is characterized by its resistance to invasions by alien or exotic species. High susceptibility to such invasions suggests that the community lacks the robustness or niche occupation required to prevent new species from disrupting the existing balance.

Key Takeaway

Key Takeaway: The three main attributes of a stable biological community are constant productivity (low variation), resilience (recovery from disturbance), and resistance to invasive species.

Your note

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