# First steps: insects, light and plant–pathogen life on a campus

> A field project in which I studied how insects respond to light and how plants and their pathogens interact across the IISER Pune campus, using field-ecology…

Source: https://khushisingh.in/research/ecology-first-steps/
Author: Khushi Singh (khushisingh.in). Licence: CC BY 4.0 for text and original illustrations, unless a credit says otherwise.
Evidence labels used on this site: established, strong evidence, emerging, hypothesis, debated. Where a page has Simple, Curious and Expert versions, all three follow.

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[Research](https://khushisingh.in/research/) · Completed · September–October 2023

IISER Pune · Prof. Sutirth Dey

Organism: [Insects and plants](https://khushisingh.in/research/model-system/#campus-insects-plants)

The question

How do insects respond to light, and how do plants and their pathogens interact in a campus ecosystem?

A field project in which I studied how insects respond to light and how plants and their pathogens interact across the IISER Pune campus, using field-ecology methods. It is where my habit of careful observation began.

## Where my curiosity started

Every later project, from molecules to embryos, grew from the same habit: **look closely, ask a simple question, test it carefully.** In this early project I watched insects drawn to (or away from) light, and the quiet arms race between plants and their pathogens around the campus.

## How insects respond to light

Many night-flying insects gather at lamps, while others avoid light. High-speed 3D tracking showed why the gatherers get stuck: they do not fly straight at the light, but keep their back turned toward the brightest part of their view, a reflex that keeps them level under the sky and makes them circle a lamp (Fabian et al. 2024). (evidence: strong evidence) Light at night also changes feeding, mating, navigation and predation, and brighter, bluer lights tend to have stronger effects (Owens & Lewis 2018). (evidence: strong evidence)

*[Here the web page has an interactive activity; open the source URL to use it.]*

## What I took away

Biology happens at every scale, from a moth at a lamp to a protein in a droplet. The best questions often start outdoors, and behaviour is one of the most sensitive read-outs of how an animal senses its world, which I now measure in flies in my [behavioural studies](https://khushisingh.in/research/behaviour-and-metabolism/).

## Methods used

- Field ecology methods
- Observation and simple experiments

[What these methods are →](https://khushisingh.in/research/toolbox/)

## References

1. Fabian ST, Sondhi Y, Allen PE, Theobald JC, Lin HT (2024) Why flying insects gather at artificial light. Nature Communications 15:689. [doi:10.1038/s41467-024-44785-3](https://doi.org/10.1038/s41467-024-44785-3)
2. Owens ACS, Lewis SM (2018) The impact of artificial light at night on nocturnal insects: a review and synthesis. Ecology and Evolution 8:11337–11358. [doi:10.1002/ece3.4557](https://doi.org/10.1002/ece3.4557)
3. Owens ACS, et al. (2020) Light pollution is a driver of insect declines. Biological Conservation 241:108259. [doi:10.1016/j.biocon.2019.108259](https://doi.org/10.1016/j.biocon.2019.108259)