Data and code from: Urban-driven homogenization of aquatic subsidy size structure cascades to riparian predator communities

The export of emergent aquatic insects is a critical energy subsidy for terrestrial food webs. While urbanization is known to alter stream communities, its effects on the size structure of these subsidies and the consequences for riparian predators remain poorly understood. This dataset was generated to investigate how impervious land cover affects the body-size distribution of emergent aquatic insects and, in turn, the community structure and diet of riparian spiders along two urban streams in Québec, Canada. The data package contains comprehensive information linking environmental drivers to community and trophic responses. The data package contains comprehensive information linking environmental drivers to community and trophic responses, organized into several files. It includes detailed data on emergent aquatic insect communities, featuring family-level identification, abundance counts, and individual body length measurements (mm) for thousands of specimens collected from floating ..., , # Data and code from: Urban-driven homogenization of aquatic subsidy size structure cascades to riparian predator communities

Dataset DOI: [10.5061/dryad.v6wwpzh8z](https://doi.org/10.5061/dryad.v6wwpzh8z)

## Description of the data and file structure

This dataset (File_3.zip) contains the data and R code required to replicate the analyses, testing the hypothesis that urbanization, measured by impervious cover, alters the body-size structure of emergent aquatic insect subsidies, which in turn affects the diet and community structure of riparian spiders. Data were collected from 20 sites distributed along two rivers (Milette and Sables) in Quebec, Canada, representing a gradient of watershed urbanization.

The geospatial, environmental, and community data include: watershed-level land-use metrics (e.g., proportion of impervious cover, distance from upstream); discrete and continuous site-level physicochemical water quality measurements (e.g., temperature, conductivity, dissolved oxyge..., ,