Environmental drivers such as sea level affect genetic evolution and point to where conservation efforts may be focused. What drives crocodile evolution? Is climate a major factor or changes in sea levels? Determined to find answers to these questions, researchers from McGill University discovere
American Crocodile . This species of crocodile is native to the Americas, ranging from the southeastern United States to northern South America. It is an apex predator and is typically found in coastal saltwater habitats, such as mangrove swamps and lagoons. American crocodiles are known for their long, slender snout and powerful jaws, and can grow up to 5 meters in length. Credit: Hans Larsson
What drives crocodile evolution? Is climate a major factor or changes in sea levels? Determined to find answers to these questions, researchers fromdiscovered that while changing temperatures and rainfall had little impact on the crocodiles’ gene flow over the past three million years, changes to sea levels during the Ice Age had a different effect.
American Crocodile on the Pacific coast of Panama. They are considered to be a threatened species, and conservation efforts are underway to help protect and conserve populations. Credit: José Avila-Cervantes The team compared the climate tolerance of living populations of American crocodiles to the paleoclimate estimates for the region over the past 3 million years – the time span of extreme climate variation during the Ice Age.
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