Table 2. Diazotrophic microplankton abundance during the Malaspina expedition.
| Prov | nTrich | Trichodesmium | ndia | Richelia | Rhizosolenia | Hemiaulus Hauckii |
|---|---|---|---|---|---|---|
| 106 trichomes m−2 | 106 colonies m−2 | 106 cells m−2 | 106 cells m−2 | |||
| NASE | 11 | 3.20±5.64 | 10 | 0.24±0.36 | 0.58±0.40 | 2.19±4.16 |
| NATR | 13 | 25.06±15.24 | 14 | 0.15±0.39 | 1.03±1.02 | 2.11±3.18 |
| WTRA | 7 | 48.51±63.80 | 7 | 0.02±0.04 | 1.90±3.49 | 0.00±0.00 |
| SATL | 21 | 7.32±20.01 | 24 | 4.64±12.61 | 6.96±18.12 | 21.42±59.95 |
| CARB | 3 | 47.00±46.67 | 5 | 0.28±0.62 | 1.35±1.90 | 2.23±1.97 |
| ISSG | 19 | 0.92±1.33 | 19 | 0.15±0.37 | 0.61±0.82 | 25.14±98.58 |
| SPSG | 9 | 23.82±32.98 | 9 | 0.33±0.41 | 1.84±1.40 | 0.21±0.33 |
| PEQD | 6 | 0.17±0.23 | 6 | 0.00±0.00 | 1.48±0.94 | 0.05±0.13 |
| PNEC | 12 | 2.80±2.22 | 12 | 0.00±0.00 | 1.92±3.09 | 0.00±0.01 |
| NPTG | 15 | 0.93±0.70 | 14 | 0.00±0.00 | 0.33±0.52 | 0.55±1.82 |
Averaged photic layer depth-integrated abundance of Trichodesmium spp. trichomes, Richelia colonies, Rhizosolenia spp. and Hemiliaulus hauckii spp. computed for the tropical and subtropical biogeographical provinces crossed during the Malaspina expedition (Prov.): NASE (NE Atlantic Subtropical Gyral), NATR (North Atlantic Tropical Gyral), WTRA (Western Tropical Atlantic), SATL (South Atlantic Gyral), CARB (Caribbean), SPSG (South Pacific Subtropical Gyre), PEQD (Pacific Equatorial Divergence), PNEC (North Pacific Equatorial Countercurrent) and NPTG (North Pacific Tropical Gyre). nTrich and nDia are the number of stations where Trichodesmium spp. and the other diazotrophic microphytoplankton groups were determined, respetively. Errors correspond to standard deviations.