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Answer: 2. Species area relationships

Key idea: Alexander von Humboldt studied plant diversity in South American forests.

He found that species richness rises with the area explored, but only up to a limit, giving the species-area relationship, \(\log S=\log C+Z\log A\). Limiting factors (Liebig), population growth equations (Verhulst-Pearl) and biodiversity categories are credited to others. Answer: (2).

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report
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