human impacts on coral reefs
DESCRIPTION
Human Impacts on Coral Reefs. Part 1 Natural Stresses and Human Uses. Factors Correlated with Healthy Coral Reef Growth. water temperature range: 18 – 29 C normal seawater salinity: 32 – 35 ‰ low inorganic nutrient concentrations (oligotrophic waters) clear, transparent water - PowerPoint PPT PresentationTRANSCRIPT
Human Impacts on Coral Reefs
Human Impacts on Coral Reefs
Part 1Natural Stresses and Human Uses
Part 1Natural Stresses and Human Uses
Factors Correlated with Healthy Coral Reef Growth
Factors Correlated with Healthy Coral Reef Growth
• water temperature range: 18 – 29C• normal seawater salinity: 32 – 35 ‰
• low inorganic nutrient concentrations (oligotrophic waters)
• clear, transparent water
• little or no sedimentation
• vigorous water motion
• water temperature range: 18 – 29C• normal seawater salinity: 32 – 35 ‰
• low inorganic nutrient concentrations (oligotrophic waters)
• clear, transparent water
• little or no sedimentation
• vigorous water motion
Natural Sources of Stress on Coral Reefs
Natural Sources of Stress on Coral Reefs
• intense storms
• El Niño
• disease
• volcanic eruptions
• predator population explosions
• natural stream and river runoff
• exceptionally low tides
• intense storms
• El Niño
• disease
• volcanic eruptions
• predator population explosions
• natural stream and river runoff
• exceptionally low tides
Impacts of El NiñoImpacts of El Niño
Marine Life Impacted
Drought
Floods Tropical Storm
Forest Fires Bird life impacted
Coral Reef Damage Coastal Erosion
Some Local Human ImpactsSome Local Human Impacts
• thermal effluents
• sewage discharges and agricultural runoff
• mechanical damage to reefs
• sedimentation
• destructive resource extraction practices
• introduced species
• loving a reef to death
• thermal effluents
• sewage discharges and agricultural runoff
• mechanical damage to reefs
• sedimentation
• destructive resource extraction practices
• introduced species
• loving a reef to death
Global Human ImpactsGlobal Human Impacts
• global warming• ozone depletion• ocean acidification
• global warming• ozone depletion• ocean acidification
Possible Consequences of Stresses and Impacts on Corals and Coral Reefs
Possible Consequences of Stresses and Impacts on Corals and Coral Reefs
• outright mortality of coral tissues
• breakage of coral colonies
• bleaching
• diseases
• slower growth
• reduced reproduction and recruitment
• competitive exclusion by other organisms
• increased reef erosion
• outright mortality of coral tissues
• breakage of coral colonies
• bleaching
• diseases
• slower growth
• reduced reproduction and recruitment
• competitive exclusion by other organisms
• increased reef erosion
Modern Uses of Coral ReefsModern Uses of Coral Reefs• Seafood• Food Additives and Toiletries• Health and Medicine Products• Research and Education• Jewelry and Art• Marine Aquarium Specimens• New Land• Cement & Other Building Supplies• Shoreline Protection• Recreation
• Seafood• Food Additives and Toiletries• Health and Medicine Products• Research and Education• Jewelry and Art• Marine Aquarium Specimens• New Land• Cement & Other Building Supplies• Shoreline Protection• Recreation