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Does artificial light at night alter moth community composition?

Kylee Grenis1, César Nufio2,3, Gina M Wimp4

  • 1Department of Biological Sciences, University of Denver, Denver, CO, 80210, USA.

Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
|October 29, 2023
PubMed
Summary
This summary is machine-generated.

Artificial light at night (ALAN) significantly impacts moth communities. Increased sky glow reduces moth abundance and diversity, altering community composition, highlighting light pollution

Keywords:
Lepidopteraartificial light at night (ALAN)biodiversity losscommunity ecologyecological trap

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Area of Science:

  • Ecology
  • Environmental Science
  • Entomology

Background:

  • Ecological studies on artificial light at night (ALAN) often overlook community-level dynamics.
  • ALAN is a suspected driver of insect and biodiversity declines, necessitating community-focused research.
  • Understanding species-specific responses to ALAN is crucial for assessing its broader ecological impacts.

Purpose of the Study:

  • To investigate how different types of artificial light at night affect moth community composition.
  • To test the hypothesis that moth species exhibit differential responses to ALAN, leading to community shifts.
  • To determine the influence of local light sources, sky glow, site area, and vegetation on moth diversity.

Main Methods:

  • Moth communities were sampled in prairie fragments in Colorado, USA.
  • The study utilized both light and bait traps to capture moths.
  • Statistical analyses examined the relationship between ALAN metrics (sky glow, local light sources) and moth community parameters (abundance, species richness, composition).

Main Results:

  • Increased sky glow was found to decrease overall moth abundance and species richness.
  • Sky glow significantly shifted moth community composition, particularly evident in data from bait traps.
  • Local light sources exhibited contrasting effects on moth community composition compared to sky glow.

Conclusions:

  • Artificial light at night demonstrably impacts moth communities at a community level.
  • Sky glow is a significant factor altering moth community structure and diversity.
  • Further research into the nuanced effects of different ALAN types is essential for understanding light pollution's impact on biodiversity.