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.
While Harlow brushed off the incident coolly, thereâs no denying fainting can be pretty frightening (especially when it happens on live TV!). Getting a little too hot isn't the only reason you might faint. Here's what's really going on, plus 5 reasons you might pass out.