Why can’t the producers in some ecosystems make an unlimited supply of organic material?

It is an increase in the amount of algae and other producers that result from a large input of a limiting nutrients. ... Producers often cannot produce an unlimited supply of organic material because 1 or more nutrients are in short supply.

as the gila monster consumes the eggs or young of the desert cottontail and gambel's quail, thus its main food supply is only accessible for a restricted time duration every year. however, for this, the gila monsters exhibit three adaptations, which elevate their survival rate in the desert condition.  

first, is that they possess huge bodies, and can consume greater concentrations of food during a small period. secondly, they require to feed infrequently as they can accumulate fat in their tails. ultimately, their rate of metabolism is very low, so that they can burn their reservoirs of fat gradually.  

b.have there own function.