Global biodiversity has declined
The Living Planet Index reflects the overall health of our planet's biodiversity.
It works a bit like a stock exchange index, by tracking average changes in animal populations from around the world.
The Index in detail:
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The 30% decline means that on average, species population sizes were 30% smaller in 2007 than in 1970.
This decline is seen in all biomes.
And is highest in freshwater habitats.
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But the trend is not the same all over the world
Tropical and temperate regions show starkly divergent trends.
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As do high-income and low- and middle-income countries.
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Scroll over the map below to see the Living Planet Index in more detail in different habitat types in tropical and temperate areas.
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