Human activity is driving a massive global decline in animal populations
In short: Researchers have highlighted a significant and under-recognized trend of global biodiversity loss caused by human activity. While the extinction of species often captures headlines, the study reveals a more pervasive issue: a dramatic drop in the abundance of surviving animals. Since 1500, 322 terrestrial vertebrate species have gone extinct, while the remaining populations have seen an average decline of 25%.
The study also notes that invertebrate populations are facing similar pressures, with 67% of monitored groups showing a 45% mean decline in abundance. These shifts are considered a major driver of global ecological change, potentially impacting both ecosystem health and human well-being.
This review synthesizes existing data to illustrate the scale of 'Anthropocene defaunation.' A primary limitation is that many knowledge gaps remain regarding the specific mechanisms of these declines, which complicates our ability to predict or limit their future impacts.
Why it matters: The loss of animal abundance, not just total extinction, is a primary driver of global ecological change.
Opens the Intellect+ feed with this card first. Swipe up for the next one.
Sources
- Summary by Intellect · source: Research: Dirzo et al. (2014). Defaunation in the Anthropocene. Science (New York, N.Y.).
To cite this card, link to https://intellectplus.co.uk/app/science-research-human-activity-is-driving-a-massive-global-decline-in-animal.
How we source, check and correct cards: Editorial standards.
General information, not professional advice. Spotted an error? Flag the card or see corrections and complaints.
Intellect Plus is a visual educational discovery platform for exploring fascinating facts and ideas. Brain Food, Not Brain Rot. What is Intellect Plus?
Related
More in Science · Latest · A–Z · All topics
