Table 1 Temperature, inorganic and organic nutrient concentrations within Trichodesmium blooms at three different developmental stages (sparse, slick and PCD-like), as well as in clear and sewage-affected seawater.

From: Untreated sewage outfalls do not promote Trichodesmium blooms in the coasts of the Canary Islands

Site Latitude (°N) Longitude (°E) Temperature (°C) NO3 + NO2–− (µM) PO43− (µM) NH4+ (µM) DOC (µM) DON (µM) DOP (µM)
Sparse Trichodesmium colonies 27.46° 382′ 15.43° 243′ 24.7 0.37 ± 0.06 0.12 ± 0.01 0.47 ± 0.17 163.68 ± 15.41 2.63 ± 0.78 0.50 ± 0.02
Slick Trichodesmium colonies 27.48° 343′ 15.44° 776′ 23.64 0.27 ± 0.01 0.16 ± 0.04 0.25 ± 0.03 232.87 ± 33.95 1.51 ± 0.20 0.55 ± 0.04
PCD-like Trichodesmium colonies 27.44° 930′ 15.41° 307′ 23.75 0.28 ± 0.01 2.64 ± 0.41 0.97 ± 0.24 418.48 ± 51.74 2.35 ± 0.18 0.26 ± 0.10
Clear seawater 27.44° 420′ 15.44° 547′ 23.45 0.26 ± 0.08 0.15 ± 0.01 0.23 ± 0.02 112.21 ± 3.68 1.20 ± 0.28 0.48 ± 0.06
Sewage water 27.49° 37′ 15.46° 78′ 23.34 0.27 ± 0.04 0.16 ± 0.01 1.84 ± 2.47 218.09 ± 1.99 2.00 ± 0.68 0.40 ± 0.05