I have been working for years on biological invasions. You know, the species that are put into regions in which they don’t belong and that just expend madly and outcompete everything, unchecked. A bit like Mcdonald’s in France. Because I’ve also started working on the impact of climate change on biodiversity, I’ve naturally wondered (like many) whether climate change would affect biological invasions.

My group – Biodiversity Dynamics – has produced already some awesome work on that. For example, see here, here or here. Or here and here. Or here. Ok, I stop. You see, they produce too much, I’m not the only one to say that.

Anyways, because climate change is likely to make winters milder and habitats climatically more suitable year-round for cold-blooded animals like insects, we have been wondering whether invasive insects would be able to invade other regions with climate change. There are many very nasty bugs out there.

For example, the Asian predatory wasp is an invasive hornet in Europe that butchers pollinating insects, especially bees, thereby affecting the production of many wild and cultivated plants. And we all remember what Einstein said about pollinators: « if bees were to disappear, humans will disappear within a few years » (we all remember that because it’s one of the few things he said that we understood). The highly invasive red imported fire ant is feared for its impacts on biodiversity, agriculture and cattle breeding, and the thousands of anaphylactic shocks inflicted to people by painful stings every year (with hundreds of deaths). Between the USA and Australia, over US$10 billion are spent yearly on the control of this insect alone. The tiger mosquitoes are vectors of pathogens that cause dengue fever, of the chikungunya virus and of about 30 other viruses. And I could go on.

Most of these nasty creatures are now unable to colonize northern regions of Europe or America, or southern regions of Australia, for example, because they cannot survive cold temperatures. But how will this change? Where and when which species will invade with rising temperatures? What will be the costs in terms of species loss? In terms of agricultural or forestry loss? In terms of diseases to cattle, domestic animals and humans? What will be the death toll if insects that are vectors of malaria can establish in new, highly populated areas?

All these questions, we’ve proposed to study them from a list of 20 of the worst invasive insect species worldwide. And we got selected (ie financed), so brace yourself, we are going to provide some answers. Soon. I just need to hire a couple of postdocs first to do all the work for me.


I don’t care; I don’t like popcorn anyway

  1. […] InvaCost will look at the impact on invasive insects, when climate change allows them to invade regi…. […]


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