Question

“Stability of a community depends on its species richness” Write how David Tilman shows this experimentally.

Answer 1

By using outdoor plots, Davide Tilman showed the survival of a population depends on its species richness. The outdoor door plot includes various species in each plot.

Complete answer:
First we should know about David Tilman to answer this question. David Tilman is best known for his scientific and theoretical work on competitiveness and the mechanistic causes of multispecies coexistence, and for showing that biodiversity is of fundamental importance to the functioning of habitats by rigorous field experiments and theory. Tilman spent his life creating biodiversity and species structure theories that he evaluated in studies that were specifically designed and controlled. In both algal and grassland ecosystems, his work on resource competitiveness has helped shape ecology into a more informative and quantitative science.
In the experiment of David Tilman, he shows-

The long-term ecosystem experiment by David Tilman reveals that plots of more species display fewer year-to-year variance in overall biomass.
In his experiment, he also found that greater diversity led to higher productivity.
David Tilman thus illustrates that "the stability of a community depends on the richness of its species."

Note: Tilman was elected in 2002 to the National Academy of Sciences for this and many other achievements. Tilman proposes a new theory of species diversity and abundance within ecosystems in his Inaugural Paper, published in this issue of PNAS.