David Tilman suggested:

What characteristics make a community stable?

What are the effects of biodiversity on ecosystem functioning?

Explain briefly the 'rivet popper hypothesis' of Paul Ehrlich.

According to the Rivet Popper Hypothesis,rivets represent $........$.

Which of the following characteristics are seen in a stable community?
$i$. It is strong enough to withstand environmental disturbance and recovers quickly.
$ii$. It is resistant to invasive species.
$iii$. It exhibits constant change in biomass production over a period of time.
$iv$. It has more species diversity.