Glossary of Ecology - G

G

• Genetic bottleneck - is an evolutionary event in which a significant percentage of a population or species is killed or otherwise prevented from reproducing.
• geographic dispersal - when an organism moves into another region to join another community.
• Global ecology - examines ecological phenomena at the largest possible scale, addressing macroecological questions
• global ecophagy - the consuming of an ecosystem.
• global warming - the warming of the Earth's average temperature of near-surface air and oceans
• grassland - and where grass or grasslike vegetation grows as the dominant form of plant life
• greenhouse effect - warming that results when solar radiation is trapped by the atmosphere, which is caused by gases that allow sunshine to pass through but absorb heat that is radiated back from the warmed surface of the earth