Summary: A researcher from Mainz University has published a summary of their work on the worldwide decline in insect populations and potential solutions in a special issue of Biology Letters. The decline in insect numbers and diversity is attributed to land-use intensification for agriculture and building development, climate change, and invasive species as a result of human trade. These factors interact with each other, making ecosystems more susceptible to climate change and invasive species. Specialized insect species are most affected, leading to homogenization of insect communities across habitats. This decline in diversity threatens the stability of ecosystems, as fewer insects are available for pollination and pest control, and less food is available for insect-eating animals. The researchers suggest standardized techniques for monitoring insect diversity across habitats and countries, the creation of interconnected nature reserves, and measures to reduce the spread of invasive animal and plant species through globalized trade and tourism.

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Materials provided by Johannes Gutenberg Universitaet MainzNote: Content may be edited for style and length.

Journal Reference:

  1. Martin M. Gossner, Florian Menzel, Nadja K. Simons. Less overall, but more of the same: drivers of insect population trends lead to community homogenizationBiology Letters, 2023; 19 (3) DOI: 10.1098/rsbl.2023.0007

Cite This Page:

Johannes Gutenberg Universitaet Mainz. “The reasons why insect numbers are decreasing.” ScienceDaily. ScienceDaily, 27 April 2023. <>.

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