Why does an increase in precipitation and in the number of nearby factories have a greater impact on the occurrence of Mary flowers then change in temperature length and date an invasive species?

Increased precipitation and the amount of local factories have a larger effect on the incidence of mayflowers than shifts in weather, day duration and invasive species.

It is how the rise in moisture allows the plants to thrive and further, because water causes the plants to expand. Water is very essential for plant production.

Water lets the plant transfer nutrients from the soil across its stems and leaves. Water makes the plant cool, stable and allows the plant to produce its own fat.