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 mechanism causes increased orographic enhancement of precipitation on prevailing windward slopes?
• Which ecological impact results when upwelling weakens substantially along the Peruvian coast?
• Which mechanism causes cyclonic rotation in low-pressure weather systems in the Northern Hemisphere?
• Which landscape outcome results when groundwater flows along limestone fractures?
• Which risk increases when a warming climate thaws discontinuous permafrost beneath taiga forest?
• Which mechanism causes crustal deformation near a transform fault boundary?