Table 3 Description of predictors variables used in habitat suitability models.

From: Extreme migratory connectivity and apparent mirroring of non-breeding grounds conditions in a severely declining breeding population of an Afro-Palearctic migratory bird

Variable

Description

Scale (m)

Unit

Link

NDVI

Monthly NDVI

Mean NDVI for each month of the year between 2001 and 2020

250

https://lpdaac.usgs.gov/data/

Maximum NDVI

Maximum monthly NDVI

250

https://lpdaac.usgs.gov/data/

Minimum NDVI

Minimum monthly NDVI

250

https://lpdaac.usgs.gov/data/

Climate

Precipitation

Maximum precipitation

Mean accumulated precipitation during the wettest month between 2001 and 2020

4000

mm

https://www.climatologylab.org/terraclimate.html

Minimum precipitation

Mean accumulated precipitation during the driest month between 2001 and 2020

4000

mm

https://www.climatologylab.org/terraclimate.html

Summer precipitation

Mean accumulated precipitation from June to October

between 2001 and 2020

4000

mm

https://www.climatologylab.org/terraclimate.html

Winter precipitation

Mean accumulated precipitation from November to February between 2001 and 2020

4000

mm

https://www.climatologylab.org/terraclimate.html

Monthly precipitation

Mean accumulated precipitation for each month of the year between 2001 and 2020

4000

mm

https://www.climatologylab.org/terraclimate.html

Annual precipitation

Accumulated precipitation of a given year

4000

mm

https://www.climatologylab.org/terraclimate.html

Temperature

 

Maximum temperature

Mean maximum temperature during the warmest month between 2001 and 2020

4000

°C

https://www.climatologylab.org/terraclimate.html

Minimum temperature

Mean minimum temperature during the coldest month between 2001 and 2020

4000

°C

https://www.climatologylab.org/terraclimate.html

PDSI

Palmer Drought Severity Index for a given year

4000

https://www.climatologylab.org/terraclimate.html

Elevation

30

m

https://srtm.csi.cgiar.org/

Land cover

Cropland, rainfed

300

https://www.esa-landcover-cci.org/?q=node/164

Mosaic natural vegetation

300

https://www.esa-landcover-cci.org/?q=node/164

Forest

300

https://www.esa-landcover-cci.org/?q=node/164

Shrubland

300

https://www.esa-landcover-cci.org/?q=node/164

Urban

300

https://www.esa-landcover-cci.org/?q=node/164