Elevated ozone disrupts mating boundaries in drosophilid flies

Nan-Ji Jiang, Xinqi Dong, Daniel Veit, Bill S. Hansson and Markus Knaden ()
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Nan-Ji Jiang: Max Planck Institute for Chemical Ecology
Xinqi Dong: Max Planck Institute for Chemical Ecology
Daniel Veit: Max Planck Institute for Chemical Ecology
Bill S. Hansson: Max Planck Institute for Chemical Ecology
Markus Knaden: Max Planck Institute for Chemical Ecology

Nature Communications, 2024, vol. 15, issue 1, 1-8

Abstract: Abstract Animals employ different strategies to establish mating boundaries between closely related species, with sex pheromones often playing a crucial role in identifying conspecific mates. Many of these pheromones have carbon-carbon double bonds, making them vulnerable to oxidation by certain atmospheric oxidant pollutants, including ozone. Here, we investigate whether increased ozone compromises species boundaries in drosophilid flies. We show that short-term exposure to increased levels of ozone degrades pheromones of Drosophila melanogaster, D. simulans, D. mauritiana, as well as D. sechellia, and induces hybridization between some of these species. As many of the resulting hybrids are sterile, this could result in local population declines. However, hybridization between D. simulans and D. mauritiana as well as D. simulans and D. sechellia results in fertile hybrids, of which some female hybrids are even more attractive to the males of the parental species. Our experimental findings indicate that ozone pollution could potentially induce breakdown of species boundaries in insects.

Date: 2024
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DOI: 10.1038/s41467-024-47117-7

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