The biome to which all of these organisms would be best adapted is the -

The rate that would change would be the  searching efficiency/attack rate. there are only two other rates in this model: the  growth rate of prey, and the  predator or consumer mortality rate.the  searching efficiency/attack rate is what indicates how effectively can a predator capture its prey whether in the searching process or actual capturing/attacking process. 

Ascientist will use that to figure out how or why things are the certain way they are i hope this

Iwould assume they all have the sun in the center.