2023-GroupD

This is a hypothesis-driven project. We are testing the following hypotheses.

1. The intensity of artificial light at night affects the frequency of bird-building collisions (alpha = 0.05).
2. The frequency of bird-building collisions varies among species (alpha = 0.05).

Group work was divided by the following predictions.

• Prediction 1a, the frequency of bird-building collisions increases with the intensity of artificial light: Samina Hess.
• Prediction 2a, the frequency of bird-building collisions increases in species with lower wing maneuverability: Yunhua Ren.
• Prediction 2b, the frequency of bird-building collisions is lower in omnivore species than in non-omnivore species: Leslie Gao.

The contents of the group repository are as follows.

Data (raw and processed):

• Bird-building collision data from Winger et al. (Chicago_collision_data.csv).
  • Genus: genus of each lethal bird-building collision observed
  • Species: species of each collision observed
  • Date: date on which collision was observed, Y/M/D format
  • Locality: location where collision was observed(MP: McCormick Place convention centre and CHI: downtown Chicago)
• Collision data in wide format (Chicago_collision_data_wide.csv).
  • Species_Name: scientific name of each species
  • collision_freq: total number of collisions per species
• Light intensity data from Winger et al. (Light_levels_dryad.csv).
  • Date: date on which light intensity was quantified, Y/M/D format
  • Light_Score: measure of intensity of artificial light at night, values from 1 to 17
• Bird body mass and wingspan data from Avibase (Bird_Mass_Wingspan_Windload.csv).
  • Species_Name: scientific name of each species
  • Avg_Body_Mass_g: average body mass of each species in grams
  • Avg_Wingspan_cm: average wingspan of each species in centimeters
  • Wind_Load: wind load of each species, Avg_Body_Mass_g (g)/ Avg_Wingspan_cm (cm)
• Processed bird body mass and wingspan data (merged_data.csv).
  • Species_Name: scientific name of each species
  • Avg_Body_Mass_g: average body mass of each species in grams
  • Avg_Wingspan_cm: average wingspan of each species in centimeters
  • Wind_Load: wind load of each species, Avg_Body_Mass_g (g)/ Avg_Wingspan_cm (cm)
  • collision_freq: total collision frequencies per species
• Trophic level of each species from Avibase (trophic_level.csv).
  • x: scientific name of each species
  • trophic_level: trophic level of each species (Omnivore, Carnivore, Herbivore)

Analyses:

• Analyses for Prediction 1 (prediction_1.Rmd).
• Analyses for Prediction 2a (2a_data_cleaning_merging.Rmd, prediction_2a.Rmd).
• Analyses for Prediction 2b (prediction_2b.Rmd).

Other files:

• This README.md file.
• Project proposal (EEB313_Project_Proposal.pdf).
• Mid-project update (Mid-project update.pdf).
• Presentation slides(EEB313_Pre.pdf).
• Project report (Final_project_report.pdf).