Data for: Interactions between temperature and predation impact insect emergence in alpine lakes

While insect populations are simultaneously threatened by many local and global scale stressors, the interacting effects of these factors remain poorly understood. These interactions between stressors, whether additive or antagonistic, may have profound effects on our assumptions about and predictions for any given system. Here we address this gap by exploring the interactive effects of introduced predators and elevated temperatures on emerging aquatic insects across alpine lakes. Using a crossed factorial field survey, we examine whether warmer temperatures either directly affect the magnitude or diversity of insect emergence, or mediate the impacts of predation via interactions with predator presence. Based on data from >11,000 insects collected across a two-year period, we find a 71% reduction in insect emergence associated with an additional 3.6° C of water temperature in oligotrophic alpine lakes. While our work confirms prior findings that predator presence drives strong reduct..., , Raw data files are in .csv format and can be opened with any text editor.
We used open source R software to write code, conduct analyses, and produce visualizations., # Data from: Interactions between temperature and predation impact insect emergence in alpine lakes

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This repository contains all data and code used to prepare the manuscript \"Interactions between temperature and predation impact insect emergence in alpine lakes\" (Owens et al 2023).

## Description of the Data and file structure

### Data files

Data files `combined_unsummed_etraps` and `combined_orderlevel_etraps` contain the raw counts of insects that were collected from our emergence traps in alpine lakes in California's Sierra Nevada during summers 2019 and 2021.

The column 'fish' indicates the absence (0) or presence (1) of introduced trout. The column 'block' indicates the relative elevation of each lake (1 = highest; 2 = mid; 3 = lowest pair). The column 'lake' has a 3 letter code that uniquely identifies each lake in the study (see Owens et al. 2023 supplementary material for list of exact lake locations). The column 'sample_date' is the day on which each trap was collecte...