NEET · BiologyHard
Which of the following best describes the relationship between ecosystem stability and species richness as observed in David Tilman's long-term field experiments?
- A.Stability decreases linearly with increasing species richness
- B.Stability shows no correlation with species richness
- C.Stability increases with species richness and shows less year-to-year variation in biomass
- D.Stability is highest at intermediate levels of species richness
Show correct answer & step-by-step solution
Correct answer: C — Stability increases with species richness and shows less year-to-year variation in biomass
Solution
- David Tilman conducted long-term ecosystem experiments using outdoor plots.
- He observed that plots with higher species richness showed less year-to-year variation in total biomass.
- Increased species richness contributes to higher productivity and greater resistance to environmental perturbations.
- Hence the answer is (C).
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