A universal temperature law governs all life on Earth, according to a groundbreaking discovery by researchers at Trinity College Dublin. They've uncovered a 'universal thermal performance curve' (UTPC) that applies to every living species, from bacteria to lizards and sharks. This curve reveals how organisms respond to temperature changes, showing a gradual increase in performance until an optimal point, after which performance drops sharply with rising temperatures. The UTPC effectively 'shackles evolution' as no species can escape its influence on temperature-dependent biological performance.
The UTPC connects seemingly unrelated data sets, combining tens of thousands of performance curves for different species and performance metrics. It demonstrates a consistent trend: performance increases with temperature until a peak (optimum), then drops sharply with further temperature increases. This pattern holds across various life forms, from bacteria to plants, reptiles, fish, and insects. The study suggests that species may face greater limits when adapting to global climate change, as warming temperatures could reduce the viable performance window for many species.
Andrew Jackson, a professor in Zoology at Trinity's School of Natural Sciences, explains that the UTPC's shape is remarkably similar across thousands of species, but optimal temperatures vary widely. Despite this diversity, the UTPC reveals a universal thermal performance shape. Dr. Nicholas Payne, the senior author, emphasizes the study's in-depth analysis of over 2,500 thermal performance curves, showcasing the pattern's consistency across major life groups. The research suggests that evolution has only managed to adjust the curve's position, not its overall shape, indicating a fundamental thermal performance law that all life forms must follow.
The next step is to search for exceptions to this universal law. The researchers aim to identify species that might deviate from the UTPC, which could provide valuable insights into how life adapts to temperature changes. This discovery has significant implications for understanding the limits of species' adaptability in a warming world, prompting further exploration and discussion.
