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Increased diversity contributes to highe...

Increased diversity contributes to higher productivity. This was evident from the experimental results of

A

Ehrlich

B

haeckel

C

Humboldt

D

Tilman

Text Solution

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The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding the Concept**: The question states that increased biodiversity contributes to higher productivity. This means that ecosystems with a greater variety of species tend to produce more biomass and have more stable outputs over time. 2. **Identifying the Researcher**: We need to find out which scientist conducted research that supports this claim. The options provided are Ehrlich, Haeckel, Humboldt, and Tillman. 3. **Reviewing Relevant Research**: - George David Tillman conducted extensive research over 20 years on 200 plots in a grassland ecosystem. - His findings indicated that plots with a higher number of species showed less year-to-year variation in total biomass. This suggests that more diverse ecosystems are more stable and productive. 4. **Analyzing Tillman's Conclusions**: - Tillman concluded that increased diversity (more species) leads to increased productivity (more biomass). - He emphasized that the stability of a community is linked to the richness of species present, meaning that the more diverse an ecosystem is, the more productive it will be. 5. **Selecting the Correct Answer**: Based on Tillman's research and conclusions, we can confidently select option 4, Tillman, as the correct answer to the question. **Final Answer**: The correct option is **4. Tillman**. ---
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