Table 1 Contributions of the 22 biotic and abiotic predictors to boosted regression tree models relating latitudinal trends to the (relative) abundance of the ten secondary superclasses + CO2-fixation pathways and PP at Depth 1 (n = 75) along the GO-SHIP P15S transect.
Pathway/process | Parameter 1 | Parameter 2 | Parameter 3 | Parameter 4 | Parameter 5 | cv |
|---|---|---|---|---|---|---|
PP | [Nanoplankton] (26%) | [Hex.Fuco] (26%) | [Pras] (16%) | [POC] (6%) | [NH4+] (4%) | 0.91 ± 0.02 |
CO2-fixation | Temperature (25%) | [Total pigment] (20%) | [Nanoplankton] (15%) | [chl b] 13%) | [O2] (7%) | 0.842 ± 0.04 |
Energy metabolism | Temperature (12%) | Salinity (12%) | [NH4+] (10%) | [chl b] (9%) | [Microplankton] (8%) | 0.757 ± 0.08 |
Nucleotide biosynthesis | Salinity (20%) | δ13C (16%) | Temperature (15%) | [Nanoplankton] (7%) | [Silicate] (6%) | 0.725 ± 0.13 |
Cell structure and cell wall biosynthesis. | Temperature (56%) | [NH4+] (18%) | [Zeaxanthin] (4%) | δ13C (3%) | [Picoplankton] (3%) | 0.955 ± 0.01 |
Amino acid biosynthesis | [Picoplankton] (34%) | Temperature (11%) | [Total pigment] (11%) | chl b (8%) | δ15N (5%) | 0.796 ± 0.05 |
Secondary metabolite biosynthesis | chl b (29%) | [Total pigment] (20%) | [Nanoplankton] (8%) | δ15N (7%) | C:N ratios (5%) | 0.822 ± 0.05 |
Cofactor biosynthesis | [Total pigment] (43%) | Salinity (8%) | [PON] (7%) | [Silicate] (7%) | δ15N (4%) | 0.837 ± 0.03 |
Vitamin biosynthesis | Temperature (30%) | [NO3−] (17%) | [Total pigment] (13%) | [NO2−] (9%) | [Fuco] (6%) | 0.946 ± 0.02 |
Lipid biosynthesis | Temperature (45%) | [NO3−] (9%) | [NO2−] (6%) | Salinity (5%) | [DV.Chl-a] (5%) | 0.956 ± 0.01 |
Carbohydrate biosynthesis | Temperature (56%) | [NH4+] (18%) | [Zeaxanthin] (4%) | δ13C (3%) | Salinity (3%) | 0.945 ± 0.01 |
Fermentation | Temperature (28%) | [Picoplankton] (23%) | [NO2−] (11%) | [Fuco] (10%) | δ13C (4%) | 0.928 ± 0.02 |
