Evolution of Flowering Plants Driven by Two Major Heatwaves Over 140 Million Years, Study Finds

Ancient climate shifts paved the way for the rich diversity of flowering plants, new research reveals

According to НВ — Техно: An international team of scientists from Australia and Austria has uncovered that two of the hottest climate episodes in the past 140 million years triggered both widespread extinctions and a rapid evolutionary surge in flowering plants. These events ultimately led to the vast variety and global dominance of angiosperms seen today. Flowering plants, also known as angiosperms, represent the most widespread group of plants on Earth, encompassing around 400,000 species worldwide.

Periods of intense global warming

The first significant warming phase took place roughly 100 million years ago during the mid-Cretaceous period. The second occurred at the dawn of the Cenozoic era. Lasting several million years each, these heatwaves coincided with the disappearance of many ancient species and the emergence of new ones. Researchers examined over 60,000 fossilized pollen and spore samples spanning 130 million years, enabling them to draw these conclusions.

Unlike past gradual climate changes, today's global warming is accelerating at an unprecedented pace, far quicker than the natural processes that previously allowed species millions of years to adapt. Flowering plants play a vital role in terrestrial ecosystems by forming intricate relationships with animals, fungi, and bacteria. They are also crucial in absorbing carbon dioxide, highlighting their importance in maintaining ecological balance.

The findings emphasize how historical climate fluctuations profoundly shaped plant evolution and biodiversity, offering valuable insights amid current environmental challenges. For a deeper understanding, the full study is accessible via the provided link.

This research underscores the need to comprehend plant evolutionary history in the context of ongoing ecological changes. Studying past climate conditions can aid scientists and policymakers in better predicting the effects of current global warming and crafting strategies to protect biodiversity. Given their essential role in ecosystem stability, the future of flowering plants depends on their ability to adapt to rapidly changing environments.

Understanding the impact of environmental factors on plant resilience is crucial, especially in light of recent findings on how drought influences aspen's defenses. This research highlights the complex interactions between climate conditions and plant survival, further illustrating the challenges faced by flora in a rapidly changing world.