Monosaccharides are simple sugar unit molecules, whereas polysaccharides are enormous, linking thousands of sugar units. Monosaccharides provide cells with short-term energy. Polysaccharides provide long-term energy storage and rigid structure to cell walls and exoskeletons of animals.
I think your answer is a hot summer. during this phase, there would be rapid growth in vegetation leading to increased population in rabbits and other rodents...