Table 1 Summary of the explanatory wildland bird diversity variables
From: Global impacts of fire regimes on wildland bird diversity
Factor | Variable | Pre-processed | Source |
|---|---|---|---|
Climatic | Palmer Drought Severity Index | Normalized mean data per pixel for a 20-year time series | Abatzoglou et al. 2018 |
Thermal amplitude | |||
Mean temperature | |||
Precipitation accumulation | |||
Evapotranspiration | |||
Environmental | Land cover | Mask: remove water bodies, ice areas, among others | https://lpdaac.usgs.gov/data/, last access: 20 June 2021 |
Distance to water bodies | Euclidean distance to water bodies and normalized data for each pixel | ||
Net photosynthesis | Normalized mean data per pixel for a 20-year time series | ||
Normalized difference vegetation index | |||
Biomass | Normalized mean data per pixel | ||
Vegetation continuous field | Normalized mean data per pixel for the period of 2014–2020 | ||
Geological | Soil map | Grouping into the 26 main soil categories | Nachtergaele et al. 2010 |
Topographic | X coordinate | Estimation of the centroid of each pixel | https://lpdaac.usgs.gov/data/, last access: 20 June 2021 |
Y coordinate | |||
Slope | Normalized data for each pixel | ||
Digital elevation model | |||
Aspect | Estimation from digital elevation model, normalized data for each pixel | ||
Anthropic | Road density | Normalized data for each pixel | https://www.globio.info/resources, last access: 20 June 2021 |
Population density | Normalized mean data per pixel for a 20-year time series | Dobson et al. 2000 | |
Distance to human infrastructures | Euclidean distance to human infrastructures and normalized data for each pixel | https://lpdaac.usgs.gov/data/, last access: 20 June 2021 https://www.globio.info/resources, last access: 20 June 2021 | |
Dynamic | Tree canopy cover change | Normalized mean data per pixel for the period 1982–2016 | https://glad.umd.edu/dataset/, last access: 25 June 2021 |
Short vegetation cover change | |||
Bare coil cover change |