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Insect immunity in the Anthropocene.

Md Kawsar Khan1,2, Jens Rolff1

  • 1Institute of Biology, Freie Universität Berlin, Königin-Luise-Str. 1-3, Berlin, 14195, Germany.

Biological Reviews of the Cambridge Philosophical Society
|November 5, 2024
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Summary
This summary is machine-generated.

Human activities like pollution and climate change harm insect immunity, increasing disease spread and insect decline. More research is needed on combined environmental stressors to protect ecosystems and public health.

Keywords:
global changehost–pathogen interactionsinsect declinepollutionvector‐borne diseases

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Area of Science:

  • Ecology
  • Environmental Science
  • Immunology

Background:

  • Anthropogenic activities drive global change, impacting insect physiology and immune defenses.
  • These alterations can contribute to widespread insect decline and shifts in insect-transmitted diseases.
  • Insect immune responses are vital for pathogen defense, with suppressed immunity reducing fitness.

Purpose of the Study:

  • To synthesize evidence on how anthropogenic factors affect insect immunity.
  • To understand the link between altered insect immunity and insect-borne diseases.
  • To identify research gaps and inform conservation strategies.

Main Methods:

  • Literature synthesis of studies on anthropogenic impacts on insect immunity.
  • Review of evidence for direct and indirect effects of environmental stressors.
  • Analysis of consequences for insect fitness and disease dynamics.

Main Results:

  • Insecticides and heavy metals directly inhibit immune pathways.
  • Global warming, heatwaves, CO2, and landscape degradation indirectly reduce immunity by depleting energy reserves.
  • Anthropogenic factors impair pathogen clearance, increasing vector-borne disease risk and contributing to insect mortality and reduced reproduction.

Conclusions:

  • Anthropogenic factors significantly compromise insect immunity through direct and indirect mechanisms.
  • Understanding combined stressors is crucial for accurate risk assessment.
  • Mitigation efforts are essential to protect insect populations, reduce disease transmission, and safeguard ecosystems.