Which risk increases when floating plastic debris accumulates within subtropical gyres?

💡 Explanation

When plastic accumulates, it intercepts sunlight because this reduces photosynthetic activity of phytoplankton thus deceasing their ability to uptake carbon dioxide through biological pumps, leading to lower carbon sequestration rates. Therefore decreased rate result rather than methane, mixing or upwelling which involve distinct fluid dynamics.

• Which outcome occurs when a glacial lake outburst?
• Which process limits vegetation establishment during primary pedogenesis?
• Which outcome arises when strong katabatic winds erode topographic obstructions in glacial valleys?
• Which outcome results downstream when extensive levee construction constricts a river?
• Which mechanism causes oxygen depletion in deep ocean layers during thermohaline circulation slowdown?
• Which risk significantly increases near a subduction zone after a megathrust earthquake?