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Table 2 Results of the best approximating Generalized Additive Model for explaining variation in diatom species richness

From: Distribution patterns of epilithic diatoms along climatic, spatial and physicochemical variables in the Baltic Sea

edf Ref.df Chi.sq P value  
Water temperature 1.693 1.904 4.903 0.07862
pH 2.000 2.000 13.483 0.00118**
Salinity 1.000 1.000 1.229 0.26757
Total phosphorus 1.788 1.952 9.732 0.00749**
Total nitrogen 1.675 1.889 7.922 0.01741*
Dissolved oxygen 1.628 1.853 3.452 0.15513
Precipitation 1.000 1.000 1.117 0.29058
Longitude 1.000 1.000 1.033 0.85607
Exposition 1.000 1.000 0.891 0.34508
  1. Edf estimated degrees of freedom, Ref.df referenced degrees of freedom
  2. Statistical significances: *** p < 0.001; ** p < 0.01; * p < 0.05; p < 0.1