What human activities contribute to sedimentation on coral reefs?

Sedimentation on coral reefs is significantly influenced by human activities that disrupt natural landscapes and soil stability. Coastal construction and deforestation lead to soil erosion, as trees and vegetation that typically hold soil in place are removed. When it rains or during storms, loose sediments can wash into the ocean, smothering coral reefs and affecting their health and growth.

The impact of these practices can be profound. Increased sedimentation can block sunlight, which corals need for photosynthesis, and can also carry nutrients that lead to algal blooms, further harming the delicate balance of coral ecosystems.

While other human activities, such as increased fishing and ocean dumping, may also have negative effects on coral reefs, they do not directly contribute to sedimentation in the same manner as coastal construction and deforestation. Similarly, tourism development and recreational activities may lead to physical damage or pollution, and marine research and coral farming are generally aimed at restoration and understanding, not at contributing to sedimentation. Therefore, the focus on coastal construction and deforestation as primary contributors to sedimentation on coral reefs is well-justified.