redOrbit: Species living in restricted environments such as the tropics may lack adequate variation in their genes and be unable to adapt to climate change, according to a new study. Adaptation is a physiological or behavioral change that makes an organism better suited to its environment, and more likely to survive and reproduce. Because adaptations usually occur due to a change (or mutation) in a gene, species with a more varied set of genes to begin with, are likely to have a better basis …