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Question

Identify the ecologist from the given hints.
(i) He carried out long-term ecosystem experiments using outdoor plots.
(ii) In his experiments, he showed that increased diversity contributed to higher productivity.

  1. Ahmed Khan
  2. David Tilman
  3. Stanley Cohen
  4. Earnest Chain
  5. Herbert Boyer

A
David Tilman
B
Stanley Cohen
C
Herbert Boyer
D
Earnest Chain
E
Ahmed Khan
Solution
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George David Tilman is an American ecologist. It is said that a stable community should not show too much variation in productivity from year to year; it must be either resistant or resilient to occasional disturbances (natural or man-made), and it must also be resistant to invasions by alien species. David Tilman’s long term ecosystem experiments using outdoor plots show how these attributes are linked to species richness in a community. Tilman found that plots with more species showed less year-to-year variation in total biomass. He also showed that in his experiments, increased diversity contributed to higher productivity.
So, the correct answer is 'David Tilman'.

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