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Introduction Global climate change and human activities are altering the ecological condition of estuarine and coastal ec...
Visual representation of eutrophication
Global climate change impacts Changes in the climate system will cause detrimental effects on: a) ecosystem structure and...
Global climate change impacts Effects on temperature and salinity would increase water stratification a) Higher surface w...
Global climate change impacts Regional wind patterns – will cause changes in circulation and mixing Tropical storms and ...
Global climate change impacts Sea level rise – Coastal wetlands are further affected by increasing erosion, flooding and ...
Eutrophication and human activities Related to excessive loading of nutrients – stimulates phytoplankton growth Anthropo...
Case history Mississippi River watershed and Gulf of Mexico  a) Examples of continental – scale ecosystems that     have ...
Distribution of bottom – water hypoxia
Effects of tropical storms on dissolved oxygen
Summary Coastal water quality is declining due to human activities (global climate, hydrological cycles, landscapes and t...
Questions
Paper discussion on Rablais et al. 2009
Paper discussion on Rablais et al. 2009
Paper discussion on Rablais et al. 2009
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Paper discussion on Rablais et al. 2009

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Presentation on global change and eutrophication of coastal waters by Ingrid Venero

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Transcript of "Paper discussion on Rablais et al. 2009 "

  1. 1. Introduction Global climate change and human activities are altering the ecological condition of estuarine and coastal ecosystems by intensifying problems such as eutrophication
  2. 2. Visual representation of eutrophication
  3. 3. Global climate change impacts Changes in the climate system will cause detrimental effects on: a) ecosystem structure and function b) trophic interactions c) habitat ranges d) migration patterns
  4. 4. Global climate change impacts Effects on temperature and salinity would increase water stratification a) Higher surface water temperatures tend to strengthen pycnoclines – less vertical water circulation b) Increase in freshwater runoff would help increase concentration of nutrients in the surface and decrease surface water salinity
  5. 5. Global climate change impacts Regional wind patterns – will cause changes in circulation and mixing Tropical storms and hurricanes – increased vulnerability of coastal habitats and potential effects on stratification Enhanced hydrological cycle – more water, sediments and nutrients reaching the coastal zone which are likely to enhance eutrophication
  6. 6. Global climate change impacts Sea level rise – Coastal wetlands are further affected by increasing erosion, flooding and saltwater intrusion and may reduce the services they provide as ecosystems.
  7. 7. Eutrophication and human activities Related to excessive loading of nutrients – stimulates phytoplankton growth Anthropogenic activities (industrialization and mechanized farming) produce huge quantities of reactive nitrogen and phosphorus which promote eutrophication processes.
  8. 8. Case history Mississippi River watershed and Gulf of Mexico a) Examples of continental – scale ecosystems that have suffered from landscape changes and are constantly exposed to increasing nutrient loads
  9. 9. Distribution of bottom – water hypoxia
  10. 10. Effects of tropical storms on dissolved oxygen
  11. 11. Summary Coastal water quality is declining due to human activities (global climate, hydrological cycles, landscapes and the flux of nutrients such as nitrogen and phosphorus) These excess nutrients are finding their way to coastal zones in increasing amounts and are predicted to increase the incidence and severity of eutrophication and hypoxic water formation. There has to be a reduction of nutrient loads to prevent further degradation
  12. 12. Questions
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