How might upwelling from ocean vents affect the ocean biome?

Question

How might upwelling from ocean vents affect the ocean biome?

Answer 1

I don't think that you mean upwelling.  Upwelling is when deep, nutrient rich ocean waters are brought to the surface.

I am assuming that you are refering to hydrothermal vents.  If I am correct in my assumption then below is my answer.

A hydrothermal vent is a geyser on the seafloor. It continuously spews super-hot, mineral-rich water that helps support a diverse community of organisms. Although most of the deep sea is sparsely populated, vent sites teem with a fascinating array of life. Tubeworms and huge clams are the most distinctive inhabitants of Pacific Ocean vent sites, while eyeless shrimp are found only at vents in the Atlantic Ocean.

The chemicals contained in the vent fluids support a thriving ecosystem on the ocean floor. This ecosystem is completely independent of the sun's energy. Microbes, some symbiotic, combine vent chemicals with oxygen and use the resultant energy to make food and to grow.  Large animals populate the sulfide mounds and the surrounding bare lava, living on the energy harnessed by the microbes.