For years, the disappearance of insects went unnoticed, but today the evidence is overwhelming: the world is losing not only the quantity but also the diversity of insects, which severely threatens the stability of nature.
A team led by Florian Menzel, a professor at the Institute of Molecular and Organismic Evolution at the Johannes Gutenberg University (Germany), warns that we are witnessing a global collapse of insect populations. The research, published in the journal Biology Letters of the Royal Society, compiles more than a decade of studies and temporal analyses spanning between 10 and 120 years.
Main Causes of the Decline
The researchers identify three key factors explaining this trend:
- Intensification of land use: intensive agriculture, urbanization, and deforestation.
- Climate change: extreme temperatures and alteration of life cycles.
- Invasive species: introduced through global trade and tourism.
These factors reinforce each other: a degraded ecosystem is more vulnerable to climate change and facilitates the expansion of invasive species, which displace native ones.
Ecological Consequences
The disappearance of insects directly affects pollination and natural pest control, pillars of the food chain. Examples like the decline of bumblebees show how the reduction of pollinators impacts plants and, consequently, birds, reptiles, and mammals.
Ultimately, fewer insects mean less resilient ecosystems and a higher risk of environmental collapse.
Proposed Solutions
The editorial, prepared alongside biologist Nadja Simons and forest entomology professor Martin Gossner, proposes urgent measures:
- Standardized monitoring: create global systems to measure insect diversity, especially in understudied regions.
- Network of interconnected reserves: allow species to migrate to more suitable habitats in the face of climate change.
- Control of invasive species: curb their expansion through stricter regulations in trade and tourism.
An Urgent Call
Experts insist that the insect crisis is as severe as deforestation or climate change but receives less media attention. The loss of these small animals implies the disappearance of essential ecological functions that sustain life on the planet.
Science warns that we are facing a global insect collapse that threatens biodiversity and food security. The solution requires international cooperation, stricter environmental policies, and a paradigm shift in land use. Acting now is crucial to prevent this silent crisis from becoming irreversible.
