Which of the following observations were an outcome of studies by David Tilman and coworkers at Cedar Creek,Minnesota on ecosystem stability? Check all that apply.
A)Plots with more species showed less year-to-year variation in biomass.
B)Species-rich plots were less affected by drought than species-poor plots.
C)Over-yielding was observed in more recent work at Cedar Creek.
D)Nitrogen uptake and total biomass produced were negatively correlated to species richness.
E)More diverse plots were less susceptible to invasion by new species.

Question

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David Tilman and coworkers at Cedar Creek, Minnesota, found that plots with more species showed less year-to-year variation in biomass, indicating greater ecosystem stability (A). They also observed that species-rich plots were less affected by drought, showing resilience to environmental stress (B). Over-yielding, which is higher productivity in species-rich plots compared to the sum of their monocultures, was observed in more recent work at Cedar Creek (C). Additionally, more diverse plots were found to be less susceptible to invasion by new species, suggesting that biodiversity can act as a barrier to species invasion (E). The statement about nitrogen uptake and total biomass being negatively correlated to species richness (D) is incorrect; in fact, studies often find positive correlations between biodiversity and ecosystem functions like biomass production.

Which of the Following Observations Were an Outcome of Studies