Testing a Multi-Tiered Stress-Gradient Model for Risk Assessment Using Sediment Constituents from Coral Reef Environments

by B. H. Lidz,
P. Hallock,

Document Type: Proceeding Paper

Part of: Carbonate Beaches 2000


Coral reefs are threatened worldwide by stresses ranging from local to global in extent. Local stresses range from boat/ship groundings and sewage outfalls to dredging and coastal clearing. Regional threats include nitrification via major rivers and the atmosphere, as well as proliferation of new diseases introduced into an area by mechanisms such as ships, exotic species, or atmospheric input. Global threats result from atmospheric changes including ozone depletion and increased atmospheric CO/d2. Ozone depletion causes an increase in intensities of biologically damaging UVB radiation. Increasing Co/d2 has been linked to global warming, more intense ENSO events, and decreasing aragonite saturation in sea surface waters.

Subject Headings: Reefs and sills | Risk management | Sediment | Ozone | Sewage | Dredging | Rivers and streams | Diseases

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