mervin defeo etal 2009
DESCRIPTION
Discussion of the paper by DeFeo et al. 2009 on threats to sandy beach ecosystems.TRANSCRIPT
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Defeo et al, 2009
TREATS TO SANDY BEACH ECOSYSTEMS:
A REVIEW
Paper discussion
By
Mervin E. Pérez
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GOAL
• Provide physical and ecological attributes of sandy
beach ecosystems and their main antropogenic
pressures.
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ecological features
• Dissipative beach
• Has a wide, low gradient swash zone
http://www.ozcoasts.gov.au/conceptual_mods/beaches/wdb.jsp
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• Reflective beach
• Steeper, narrow beach and swash zone
http://www.ozcoasts.gov.au/conceptual_mods/beaches/wdb.jsp
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SAND DYNAMIC
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SANDY ECOSYSTEM FAUNA
Birds
Turtles
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Sandy Ecosystems
Services
Mitigate erosion
Recycle system
Biodiversity
Nursery areas
Nesting areas
Food Chain
Transition area
Human recreation
Buffering zone
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Sandy Ecosystems
Stressor
Recreation
Nourishment (restoration)
Pollution
Exotic species
Climate change
Mining
Urban expansion
Exploitation
Cleaning
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Sandy Ecosystems
Stressor
Recreation
Nourishment (restoration)
Pollution
Exotic species
Climate change
Mining
Urban expansion
Exploitation
Cleaning or grooming
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TO DISCUSS
• How big is the problem?
• Can we mitigate threats in sandy ecosystems?
• Do we have tools to mitigate the stressors?
• How can we deal with paradigm issues?
• What are the best methods to mitigate negative factors on sandy ecosystems?
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EXERCISE
THE CASE OF THE MONTERRICO MARINE
PROTECTED AREA IN GUATEMALA
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HOW CAN WE RESOLVE THE PROBLEM?
AUDIENCE OPINION
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WHAT WE NEED TO RESOLVE
• Climate change in sandy ecosystems (long-term and large-scale stressor)
• The effect of cleaning frequency on sandy ecosystems
• Off-road vehicles could affect ecological organization
• Ecological features long-term data are necessary
• Physical disturbance frequency, intensity and exotic species
• Protected areas and multi-disciplinary analysis (paradigm shifts)