A recent extensive study of genomes from all 21 modern bat families, along with an analysis of numerous fossil bats, has put an end to the debate on the origins of bats. According to the findings published in the journal Nature, it is believed that the earliest bats emerged in Europe approximately 65 million years ago.
The study, led by Sonja Vernes from the Bat1K consortium, indicates that previous speculations suggesting Asia, Africa, or North America as potential bat origins were inconclusive due to limited fossil evidence. Vernes explained that bats’ ability to fly allowed them to disperse worldwide over millions of years.
By sequencing genomes from 103 bat species, researchers uncovered that ancient bats had 26 chromosomes and evolved shortly after the extinction of dinosaurs. The analysis revealed that bats developed echolocation early in their evolution. Notably, the study identified the fossil bat Vielasia, which lived 50 million years ago and displayed bone structures indicative of echolocation, as an essential branch in the bat family tree.
Today, bats are a diverse group of animals, with approximately 1,500 species worldwide, representing a significant portion of mammalian diversity. The study’s family tree illustrates the relationships among the 21 bat families.
The research data, now accessible globally, holds promise for understanding bat longevity and disease resistance. Bats have puzzled researchers with their exceptional longevity and resistance to viral diseases, prompting further exploration into their genomes for potential health applications.
Vernes highlighted the unique communication learning process in bats, similar to humans, which has sparked her interest in studying vocal communication in bats. Collaborating with researchers worldwide, including Canadians like Burton Lim, who contributed samples for genome testing, the study assembled a team of 600 researchers from 64 countries.
Lim, an assistant curator at the Royal Ontario Museum, shared insights into his collection process and highlighted the critical role bats play in ecosystems, from pollination to pest control. Making bat genomes widely available for research aims to encourage studies exploring unique bat features like echolocation and genetic adaptability.
Ecologist Christina Davy praised the study for shedding light on the intricate history of bats and emphasized the importance of genetic diversity in conservation efforts. The vast genetic datasets made available by the study are expected to catalyze various research initiatives in bat biology and evolution.
Overall, the comprehensive study of bat genomes offers a significant advancement in understanding bat evolution and may pave the way for addressing broader questions in the field.
