Which ecological shift occurs when increased stratification impedes vertical mixing within an ocean gyre?

💡 Explanation

When increased stratification occurs, reduced vertical mixing prevents nutrient replenishment from deeper layers to the photic zone because density differences inhibit upwelling. Therefore primary productivity decreases due to nutrient limitation, rather than enhanced availability, increased biodiversity, or macroalgae growth which all rely on consistent nutrient supply.

• Near river floodplains, which process results in loess accumulation?
• Which risk increases near transform plate margins during locked phases?
• Which outcome occurs when strong temperature gradient appears in the upper troposphere during winter?
• Which mechanism primarily controls orographic lift leading to enhanced cirque formation on mountain windward slopes?
• Which risk increases greatly when heavy rainfall saturates volcanic ash depositions?
• Following subduction of the Juan de Fuca plate, which outcome characterizes deformation inland?