How does temperature-driven stratification influence nutrient availability and coastal productivity?

How does temperature-driven stratification influence nutrient availability and coastal productivity?

• A. Stratification reduces vertical mixing, limiting nutrient supply from deep water and potentially reducing productivity unless upwelling or mixing occurs.
• B. Stratification increases mixing and nutrient supply to surface, boosting productivity.
• C. Stratification occurs only in winter and has no effect on productivity.
• D. Stratification always leads to unlimited phytoplankton growth.

Answer: (C)