It affects it because the organisms that eat grass are not gonna be able to eat and they are gonna die then the rest of the organisms are not gonna have nothing to eat
Animals that depend on this grass will either starve, or go elsewhere for food. This means that the carnivores that prey on those grass eating animals will also go hungry. This will severely disrupt the ecosystem.
Nocturunal animals can survive without water because they can avoid the heat of the day ...ground water cause its supplies house holds and it provides drinking water and watering plants