Natural iron fertilization by shallow hydrothermal sources fuels diazotroph blooms in the ocean.Iron is an essential nutrient that regulates productivity in ~30% of the ocean.  Compared with deep (>2000 meter) hydrothermal activity at mid-ocean ridges that provide iron to the ocean's interior, shallow (<500 meter) hydrothermal fluids are likely to influence the surface's ecosystem. 
THERM
Natural iron fertilization by shallow hydrothermal sources fuels diazotroph blooms in the ocean.Iron is an essential nutrient that regulates productivity in ~30% of the ocean.  Compared with deep (>2000 meter) hydrothermal activity at mid-ocean ridges that provide iron to the ocean's interior, shallow (<500 meter) hydrothermal fluids are likely to influence the surface's ecosystem. 
THERM
Natural iron fertilization by shallow hydrothermal sources fuels diazotroph blooms in the ocean.Iron is an essential nutrient that regulates productivity in ~30% of the ocean.  Compared with deep (>2000 meter) hydrothermal activity at mid-ocean ridges that provide iron to the ocean's interior, shallow (<500 meter) hydrothermal fluids are likely to influence the surface's ecosystem. 
THERM