Human activity and climate change likely combined to drive late Quaternary extinctions
In short: A review of research on Late Quaternary extinctions found that the disappearance of large and slow-breeding mammals across the globe suggests a significant human contribution. While environmental shifts played a role, the specific pattern of which species vanished provides strong evidence for human hunting and habitat alteration as primary drivers.
The research highlights that while extinctions were not immediate upon first human contact, humans likely precipitated them through direct hunting and indirect impacts like competition. However, the global scale of these extinctions may have been less severe if climatic changes had not coincided with human activity.
This review synthesizes existing studies to weigh different extinction models. A limitation of the current debate is the difficulty of isolating human impacts from environmental factors in the fossil record.
Why it matters: Understanding the past helps us see how human activity and climate change can interact to threaten biodiversity.
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Sources
- Summary by Intellect · source: Research: Koch and Barnosky (2006). Late Quaternary Extinctions: State of the Debate. Annual Review of Ecology Evolution and Systematics.
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