EUNIS Classification Systems • eunis.habitats

EUNIS habitats are provided as the tidy data set eunis_habitats, each row corresponding to a habitat at varying levels of description.

eunis_habitats
#> # A tibble: 13,115 × 8
#>    classification section version group level code    name           description
#>    <chr>          <chr>   <chr>   <chr> <int> <chr>   <chr>          <chr>      
#>  1 EUNIS_2012     NA      2012    NA        1 A       Marine habita… "Marine ha…
#>  2 EUNIS_2012     NA      2012    NA        2 A1      Littoral rock… "Littoral …
#>  3 EUNIS_2012     NA      2012    NA        3 A1.1    High energy l… "Extremely…
#>  4 EUNIS_2012     NA      2012    NA        4 A1.11   Mussel and/or… "Communiti…
#>  5 EUNIS_2012     NA      2012    NA        5 A1.111  [Mytilus edul… "On very e…
#>  6 EUNIS_2012     NA      2012    NA        5 A1.112  [Chthamalus] … "Very expo…
#>  7 EUNIS_2012     NA      2012    NA        6 A1.1121 [Chthamalus m… "Very expo…
#>  8 EUNIS_2012     NA      2012    NA        6 A1.1122 [Chthamalus] … "Areas of …
#>  9 EUNIS_2012     NA      2012    NA        5 A1.113  [Semibalanus … "Exposed t…
#> 10 EUNIS_2012     NA      2012    NA        6 A1.1131 [Semibalanus … "Very expo…
#> # ℹ 13,105 more rows

EUNIS four classifications

The eunis_habitats data set comprises four habitat classifications:

EUNIS classification from 2007, revised in 2012.
EUNIS marine classification from 2019.
EUNIS marine classification from 2022.
EUNIS terrestrial classification from 2021.

The column classification distinguishes which is which:

dplyr::distinct(eunis_habitats, classification)
#> # A tibble: 4 × 1
#>   classification
#>   <chr>         
#> 1 EUNIS_2012    
#> 2 EUNIS_M_2019  
#> 3 EUNIS_M_2022  
#> 4 EUNIS_T_2021

For example, to access the level 1 marine habitats classified according to EUNIS revision of 2022 ("EUNIS_M_2022"):

dplyr::filter(eunis_habitats, classification == "EUNIS_M_2022", level == 1L)
#> # A tibble: 3 × 8
#>   classification section version group   level code  name            description
#>   <chr>          <chr>   <chr>   <chr>   <int> <chr> <chr>           <chr>      
#> 1 EUNIS_M_2022   marine  2022    benthic     1 M     Marine benthic… Marine ben…
#> 2 EUNIS_M_2022   marine  2022    pelagic     1 MH    Pelagic water … The water …
#> 3 EUNIS_M_2022   marine  2022    ice         1 MJ    Ice-associated… Sea ice, i…

And to list ice habitats (level 2):

dplyr::filter(eunis_habitats,
              classification == "EUNIS_M_2022",
              group == "ice",
              level == 2L) |>
  dplyr::select("code", "name")
#> # A tibble: 4 × 2
#>   code  name             
#>   <chr> <chr>            
#> 1 MJ1   Sea ice          
#> 2 MJ2   Freshwater ice   
#> 3 MJ3   Brine channels   
#> 4 MJ4   Under-ice habitat