Which mechanism creates fringing reef 'haloes' in tropical islands?

💡 Explanation

Nutrient-export from island sediment creates haloes because it impacts the rate of herbivory; less algae, bare zones. The mechanism here is trophic cascade, therefore algal grazing rates increase closer, rather than ocean productivity or freshwater influx reducing pH.

• Which atmospheric feedback amplifies surface warming during an El Niño event in the eastern Pacific?
• Which outcome leads to increased fjord oxygen depletion after accelerated glacial melt?
• Which outcome results when excessive groundwater extraction accelerates limestone dissolution?
• Which consequence results when a meander cutoff occurs, altering stream flow?
• Which process creates natural levees alongside a river experiencing meander cut-off, where an oxbow lake forms?
• Which outcome regarding seismic waves increases with strike-slip fault locking?