The biggest assessment of global insect abundances to date shows a worrying drop of almost 25% in the last 30 years, with accelerating declines in Europe that shocked scientists. Other experts estimate 50% of insects have been lost in the last 50 years.
Insects are by far the most varied and abundant animals and are essential to the ecosystems humanity depends upon. They pollinate plants, are food for other creatures and recycle nature’s waste. Losses of insects are driven by habitat destruction, pesticides and light pollution.
Insects are by far the most varied and abundant animals and are essential to the ecosystems humanity depends upon. They pollinate plants, are food for other creatures and recycle nature’s waste. Losses of insects are driven by habitat destruction, pesticides and light pollution.
The research, published in the journal Science, also examined how the rate of loss was changing over time. “Europe seems to be getting worse now – that is striking and shocking. But why that is, we don’t know,” said van Klink. In North America, the declines are flattening off, but at a low level.
Elsewhere, data is much more sparse. “But we know from our results that the expansion of cities is bad for insects because every place used to be more natural habitat – it is not rocket science,” said van Klink. “This is happening in east Asia and Africa at a rapid rate. In South America, there is the destruction of the Amazon. There’s absolutely no question this is bad for insects and all the other animals there. But we just don’t have the data.”
https://www.theguardian.com/environment/2020/apr/23/insect-numbers-down-25-since-1990-global-study-finds
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