narrowbased

Narrowbased is a term used in the field of evolutionary biology to describe a species or lineage that has a relatively small geographic range. This can occur due to various factors, including historical events such as glaciations, volcanic eruptions, or human activities like deforestation and urbanization. Narrowbased species often exhibit unique adaptations to their specific environment, which can make them vulnerable to changes in their habitat. They may also have reduced genetic diversity compared to species with broader ranges, as they have fewer opportunities for gene flow with other populations. This can increase the risk of inbreeding and genetic disorders. Conservation efforts are often focused on narrowbased species to prevent their extinction, as they play crucial roles in their ecosystems and may have unique evolutionary histories. Examples of narrowbased species include the Hawaiian silversword and the Galápagos tortoise.