Their reliance on a healthy, sunlit ocean made them a canary in the coal mine, and they perished as the ecosystem they dominated collapsed. This gas would have combined with water vapor to form sulfuric acid, leading to a sharp and sudden drop in ocean pH.
Comparing Ammonites to Nautilus: Survival Traits in the Extinction Event
The nautilus, a distant relative that also survived the extinction event, has a simpler, more robust shell and a different reproductive strategy, releasing fewer, larger offspring that are better equipped to survive harsh conditions. Furthermore, their complex coiled shells, while hydrodynamically efficient and perhaps used for buoyancy control, may have been a liability in the chaotic aftermath of the impact.
This strategy, while successful for dispersal, made them completely dependent on the health of the planktonic ecosystem, which was the first to collapse during the impact winter. Why Ammonites Were Especially Vulnerable While the K-Pg event was a global catastrophe, the reasons ammonites were hit so much harder than their distant cousins, the nautilus, lie in their specific biology and life history.
Comparing Ammonites to Nautilus: Survival Traits in the Extinction Event
These larvae were essentially planktonic, drifting with the currents and forming a crucial part of the marine plankton community. Without a stable supply of food, populations would have crashed rapidly.
More About Why did ammonites go extinct
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More perspective on Why did ammonites go extinct can make the topic easier to follow by connecting earlier points with a few simple takeaways.
