Living Planet Index: interpreting wildlife population trends correctly
Quick dive
- The 2026 Living Planet Index dataset covers mammals, birds, reptiles, amphibians and fish, not invertebrates or plants.
- Across 35,803 wildlife populations, the article reports an average decline of 73% since 1970, while exactly 50% of populations declined, 43% increased and 7% remained stable.
- The index is calculated from rates of change in monitored populations and uses a geometric mean; it does not directly measure species extinctions or the number of individuals lost globally.
- Regional trends vary sharply: Latin America and the Caribbean showed an average decline of 95%, Asia 49%, Europe 23% and Africa 80% in the reported dataset.
- exam_relevance: tests biodiversity indicators, geometric means, population versus species concepts and ecological interpretation; it echoes UPSC Prelims 2019 biodiversity questions and Mains GS-III conservation themes, with the 50/43/7 split exposing a likely data-misreading trap.
Full explanation
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