These fluctuations may also affect the predators that feed on these prey items, such as wolves, foxes and owls. These predators must either find an alternate source of prey or risk starvation and death. Ecological Succession. When changes to either abiotic or biotic factors affect an entire ecosystem, ecological succession occurs.
A temporary decrease in blood flow to the brain results in unconsciousness, or fainting. Many disorders, some of them serious, can cause this.
When you feel like you are going to faint, then lie down and elevate your legs. In the alternative, sit down and put your head between your knees until the fainting spells pass. A couple of feeling faint or pass out prevention measures are: increase salt intake.