This study suggested that the risk of extinction of species in species-rich communities are higher as compared to species-poor communities. The largest web lost fifty percent of the total species when the smallest web lost only ten percent of species at same level of temperature variability. This indicates that species-poor communities are more robust than species-rich communities at same level of perturbation. Previous studies has illustrated that density of the species decreases with increasing number of species in the food web. Therefore, those species with low density lies closer to the extinction thresholds which cause higher extinction risk in species-rich community as seen in this study.

This study also suggested a quick abrupt change in food web when the food web crossed a lower threshold. The mechanism behind quick abrupt change is due to direct extinction of species by increased temperature variability and indirect secondary extinction triggered by the extinction of primary producer.The loss of resource in small food web will lead to quick bottom-up extinction cascade, and a greater possibility of community collapse when the community has a few basal species.

Similarly, the study also suggested that the time taken to lose 1/6 of the species decreased as the number of species in food web increased. As discussed earlier, it is probably due to higher density species in small food webs.

The results showed that highly sensitive species showed extremely high extinction risk even in small raise in temperature variability. This indicates that in recent future, at same level of temperature variability, tropical species will probably suffer more due to raise in temperature.

At global scale, species existing on lower latitude are more sensitive to increasing temperature than the species existing in higher latitude. Studies have shown that, the current temperature at higher latitudes is quite different from the optimum temperature of the species. So, one can speculate when exposed to similar level of temperature variation, species from higher latitude will be less affected as compared to lower latitude species. But global climate change predictions have shown that the magnitude of temperature variation will be larger in higher latitude. Considering this fact tropical and temperate community might be equally vulnerable to changing climate.

Present study suggested that connectance only has weak effects on extinction risk . It is not clear why complexity of community did not show any noticeable difference in mean extinction risk of species with respect to increasing temperature variability.

It is suggested that temperature itself affects the connectance of food webs by affecting relative activation energies required for handling time and attack rate. It is argued that in warmer environments predators develop generalist behaviors by spending more time in searching for prey than handling which increases connectance. This suggests that we need to understand how the increasing temperature will affect food web connectance before attempting to evaluate the response of ecological community to temperature variability.