Philosophical Transactions of the Royal Society B: Biological Sciences
Restricted accessResearch articles

Part-night exposure to artificial light at night has more detrimental effects on aphid colonies than fully lit nights

Robin Heinen

Robin Heinen

Terrestrial Ecology Research Group, Department for Life Science Systems, Technical University of Munich School of Life Sciences, 85354 Freising, Germany

[email protected]

Contribution: Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Project administration, Validation, Visualization, Writing – original draft, Writing – review & editing

Google Scholar

Find this author on PubMed

,
Oriana Sanchez-Mahecha

Oriana Sanchez-Mahecha

Terrestrial Ecology Research Group, Department for Life Science Systems, Technical University of Munich School of Life Sciences, 85354 Freising, Germany

Contribution: Investigation, Methodology, Writing – review & editing

Google Scholar

Find this author on PubMed

,
T. Martijn Bezemer

T. Martijn Bezemer

Institute of Biology, Section Plant Ecology and Phytochemistry, Leiden University, 2333 BE Leiden, The Netherlands

Contribution: Conceptualization, Investigation, Methodology, Validation, Writing – review & editing

Google Scholar

Find this author on PubMed

,
Davide M. Dominoni

Davide M. Dominoni

School of Biodiversity, One Health & Veterinary Medicine, University of Glasgow, Glasgow G61 1QH, Scotland

Contribution: Conceptualization, Investigation, Methodology, Validation, Writing – review & editing

Google Scholar

Find this author on PubMed

,
Claudia Knappe

Claudia Knappe

Institute of Biochemical Plant Pathology, Institute of Biochemical Plant Pathology, D-85764, Neuherberg, Germany

Contribution: Data curation, Formal analysis, Methodology, Validation

Google Scholar

Find this author on PubMed

,
Johannes Kollmann

Johannes Kollmann

Chair of Restoration Ecology, Department for Life Science Systems, Technical University of Munich, 8534 Freising, Germany

Contribution: Conceptualization, Investigation, Methodology, Writing – review & editing

Google Scholar

Find this author on PubMed

,
Anton Kopatsch

Anton Kopatsch

Research Unit Environmental Simulation, Helmhotz, Munich, D-85764, Neuherberg, Germany

Contribution: Formal analysis, Investigation, Software, Validation, Visualization, Writing – review & editing

Google Scholar

Find this author on PubMed

,
Zoë A. Pfeiffer

Zoë A. Pfeiffer

Terrestrial Ecology Research Group, Department for Life Science Systems, Technical University of Munich School of Life Sciences, 85354 Freising, Germany

Contribution: Investigation, Methodology, Project administration

Google Scholar

Find this author on PubMed

,
Michael Schloter

Michael Schloter

Research Unit Comparative Microbiome Analysis, Helmhotz, Munich, D-85764, Neuherberg, Germany

Chair of Soil Science, Department for Life Science Systems, Technical University of Munich, 85354 Freising, Germany

Contribution: Conceptualization, Investigation, Methodology, Validation, Writing – review & editing

Google Scholar

Find this author on PubMed

,
Sarah Sturm

Sarah Sturm

Terrestrial Ecology Research Group, Department for Life Science Systems, Technical University of Munich School of Life Sciences, 85354 Freising, Germany

Contribution: Investigation, Methodology, Project administration, Validation

Google Scholar

Find this author on PubMed

,
Jörg-Peter Schnitzler

Jörg-Peter Schnitzler

Research Unit Environmental Simulation, Helmhotz, Munich, D-85764, Neuherberg, Germany

Contribution: Conceptualization, Investigation, Methodology, Resources, Validation, Writing – review & editing

Google Scholar

Find this author on PubMed

,
A. Corina Vlot

A. Corina Vlot

Institute of Biochemical Plant Pathology, Institute of Biochemical Plant Pathology, D-85764, Neuherberg, Germany

Chair of Crop Plant Genetics, Faculty of Life Sciences: Food, Nutrition and Health, University of Bayreuth, D-95447, Kulmbach, Germany

Contribution: Conceptualization, Formal analysis, Investigation, Methodology, Resources, Validation, Writing – review & editing

Google Scholar

Find this author on PubMed

and
Wolfgang W. Weisser

Wolfgang W. Weisser

Terrestrial Ecology Research Group, Department for Life Science Systems, Technical University of Munich School of Life Sciences, 85354 Freising, Germany

Contribution: Conceptualization, Funding acquisition, Investigation, Methodology, Resources, Validation, Writing – review & editing

Google Scholar

Find this author on PubMed

    Artificial light at night (ALAN) threatens natural ecosystems globally. While ALAN research is increasing, little is known about how ALAN affects plants and interactions with other organisms. We explored the effects of ALAN on plant defence and plant–insect interactions using barley (Hordeum vulgare) and the English grain aphid (Sitobion avenae). Plants were exposed to ‘full’ or ‘part’ nights of 15–20 lux ALAN, or no ALAN ‘control’ nights, to test the effects of ALAN on plant growth and defence. Although plant growth was only minimally affected by ALAN, aphid colony growth and aphid maturation were reduced significantly by ALAN treatments. Importantly, we found strong differences between full-night and part-night ALAN treatments. Contrary to our expectations, part ALAN had stronger negative effects on aphid colony growth than full ALAN. Defence-associated gene expression was affected in some cases by ALAN, but also positively correlated with aphid colony size, suggesting that the effects of ALAN on plant defences are indirect, and regulated via direct disruption of aphid colonies rather than via ALAN-induced upregulation of defences. Mitigating ecological side effects of ALAN is a complex problem, as reducing exposure to ALAN increased its negative impact on insect herbivores.

    This article is part of the theme issue ‘Light pollution in complex ecological systems’.

    Footnotes

    One contribution of 17 to a theme issue ‘Light pollution in complex ecological systems’.

    Electronic supplementary material is available online at https://doi.org/10.6084/m9.figshare.c.6837639.

    References