The gentoo penguins of antarctica depend on the icy habitat for nesting areas for their young. how could increased methane in the atmosphere affect the population of gentoo penguins in antarctica? . (a)the penguin population will increase due to longer and colder winters.. (b)the penguin population will decrease due to longer and colder winters.. (c)the penguin population will increase due to shorter and warmer winters.. (d)the penguin population will decrease due to shorter and warmer winters.