Post on 14-Jun-2015
description
transcript
Defeo et al, 2009
TREATS TO SANDY BEACH ECOSYSTEMS:
A REVIEW
Paper discussion
By
Mervin E. Pérez
GOAL
• Provide physical and ecological attributes of sandy
beach ecosystems and their main antropogenic
pressures.
ecological features
• Dissipative beach
• Has a wide, low gradient swash zone
http://www.ozcoasts.gov.au/conceptual_mods/beaches/wdb.jsp
• Reflective beach
• Steeper, narrow beach and swash zone
http://www.ozcoasts.gov.au/conceptual_mods/beaches/wdb.jsp
SAND DYNAMIC
SANDY ECOSYSTEM FAUNA
Birds
Turtles
Sandy Ecosystems
Services
Mitigate erosion
Recycle system
Biodiversity
Nursery areas
Nesting areas
Food Chain
Transition area
Human recreation
Buffering zone
Sandy Ecosystems
Stressor
Recreation
Nourishment (restoration)
Pollution
Exotic species
Climate change
Mining
Urban expansion
Exploitation
Cleaning
Sandy Ecosystems
Stressor
Recreation
Nourishment (restoration)
Pollution
Exotic species
Climate change
Mining
Urban expansion
Exploitation
Cleaning or grooming
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?
EXERCISE
THE CASE OF THE MONTERRICO MARINE
PROTECTED AREA IN GUATEMALA
HOW CAN WE RESOLVE THE PROBLEM?
AUDIENCE OPINION
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)