Skyglow and especially direct streetlight pollution alter moth communities

Light pollution caused by artificial light at night (ALAN) affects biodiversity worldwide and is still increasing. Species vary in their response to ALAN, but the impact on communities remains poorly understood. Effects of indirect light pollution by skyglow and direct streetlight pollution on communities have usually been addressed separately, and in most studies so far, urbanisation levels are a confounding factor for ALAN effects per se. Here, we sampled garden moth communities according to a study design that integrated two levels of direct streetlight pollution and two regional skyglow levels to test for additive effects of both types of ALAN. We also tested whether ALAN conditions related to community changes in species’ morphological, behavioural and life-history traits. Both skyglow and streetlights negatively affected moth abundance. Species richness and diversity decreased under direct streetlight, independent of skyglow levels. Both types of ALAN affected moth community compo..., , # Data from: Skyglow and especially direct streetlight pollution alter moth communities

Dataset DOI: [10.5061/dryad.6djh9w1d2](10.5061/dryad.6djh9w1d2)

## Description of the data and file structure

The dataset \"EVdS et al-EnvPol.xlsx\" contains: moth abundance data from gardens under different skyglow levels and with or without nearby streetlights; environmental data for each garden; moth species traits. Moths were sampled in collaboration with citizen scientists, using both light and bait traps. Light trapping took place on pre-defined nights; moths were photographed by the volunteers ,and moths were identified by the first author using local literature. Bait traps remained continuously active for several days; trapped moths were collected by the authors and identified using local literature and moth genitalia examination. All missing data given as NA.

### Files and variables

#### File: EVdS\_et\_al-EnvPol.zip

**Description:** This dataset contains all data used for our analyses i...,