Bats - Evolutionary Origin

Why in News?

A comprehensive analysis of bat genomes and fossil records suggests that bats originated in Europe approximately 65 million years ago.

• Study conducted by – 137 scientists from 64 countries under the Bat1K consortium.
• Key Findings – It challenges earlier hypotheses that bats originated in Africa or North America.

• Evolutionary Significance – The study demonstrates that two key characteristics, flight and echolocation, emerged early in bat evolution.
  • Flight – It provided bats with a significant advantage in dispersal.
  • Some modern bat species are capable of migrating thousands of kilometres.
  • Echolocation
  • Bats emit vocalizations or calls.
  • They detect and interpret returning echoes.
  • This information is used to navigate and locate prey, particularly in low-light conditions.
• Fossil evidence indicates that echolocation evolved prior to the diversification of modern bats.
• Ecosystem Services
  • Pollination of plants supports the maintenance of biodiversity.
  • Regulation of insect pest populations contributes to reduced crop damage.
  • Seed dispersal facilitates forest regeneration.
• Connections to Human Health
  • Bats host a wide range of viruses without exhibiting disease symptoms.
  • Unique immune system adaptations contribute to their resilience.
  • Bats exhibit unusually long lifespans relative to their small body size.
• Bat‑Inspired Medicine
  • Genetic studies provide insights into mechanisms of disease resistance and longevity.
  • These findings have potential applications for advancing human health innovations.

Reference

The Hindu | Bat’s Evolutionary Origin