Insect declines: Apocalypse Now to Great Expectations

Some interesting syntheses of long-term insect data have been published in the last few months. These synthesis studies attempt to provide an answer to the big question mark raised by the recent insect apocalypse narrative.

This is how much of an impact a single study that gets lots of attention can have on the direction of science. The insectageddon opinion piece that started this ball rolling had fundamental flaws that are now well-documented (unfortunately it is still being widely cited in scientific literature and popular media as supposed evidence of decline). Sure, one could argue it got people talking about an important issue that we already had decades of evidence for.

But at what cost? Its long-term effects on science communication and scientific efforts are most concerning, something we flagged in our analysis published earlier this year.

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Special issue on insect conservation and population trends

The latest issue of Insect Conservation & Diversity is out, a special issue on insect population trends. I’m really happy I was able to contribute to a few papers in this issue as both editor and author (obviously not the same papers in each case!).

Thanks to Editor in Chief Raphael Didham for pulling together a great collection of papers, as well as rallying the editorial team to contribute to the issue with this really useful peer-reviewed paper summarising the key challenges involved in measuring insect population trends. This paper is really timely, as it highlights some of the potential pitfalls involved in estimating population changes over time.

Ecological data (e.g. long-term data on animal population trends) are not like simplified stock market trends or sports team stats. They are confounded by numerous complex environmental and measurement factors, many of which an observer may not be aware of. Nature isn’t simple and we’re kidding ourselves if we want a quick and easy answer to sum up everything, everywhere. Continue reading