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Which would most likely decrease the genetic variation in the human population?
a link in the food chain is probable broken. ( a species became extinct)
Decrease.
alternately increase and decrease
If the human population was reduced to a very small number of interbreeding individual then this small population, denied outbreeding, would have very little genetic variation. Humans, who went through a bottleneck event about 70,000 years ago, are considered a " small " species because they have little genetic variation in comparison to many other species. Google cheetah to see how this concept works.
It will decrease
decrease the number of hawks
Famine
The aliens start attacking them more
The shrimp population will decrease
the plankton population would decrease
The population's size will decrease.