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Save Rio Tigre....Save All Osa's Rivers

What Is the Threat?

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Good Bye to River Otters?
What's at Stake
What Is the Threat?
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Community Fights to Save Its River
Help Save Entire Watersheds

 
A HUGE ECOLOGICAL DISASTER

rivermine.gif

40% of the river will be mined

Sedimentation and changes in river turbidity, temperature, speed and oxygen balance will effect the entire river ecosystem and food chain with direct repercussions on the Golfo Dulce.

 

 
v FAUNA:
Macroinvertebrates: essential components of any ecosystem, they are very important to maintain water quality and are highly affected by Gravel Mining (cf. Will Flower report).
 Fishes, freshwater shrimps, birds, bats, spiders, amphibians, reptiles, etc., feed on Macroinvertebrates
 Freshwater shrimps and some fishes need to go to the sea for their first molt and will be directly affected by sedimentation and turbidity.
 River Otter – a CITIES Appendix 1 Endangered Species – is present in the Rio Tigre.
A large part of its diet consists of freshwater shrimp.
v DISAPPEARANCE OF VEGETATION ON THE RIVER EDGE
 Reduction of organic particles, reduced quantity of prey and microhabitat diversity
 Vegetation is used by amphibians for breeding vocalizations and protection during the day.
 Protective vegetation is used by mammals to access river.
 
v DISAPPEARANCE OF SMALL PONDS AND WET AREAS ALONG EDGES OF RIVER
 Amphibians species use these temporary slow moving ponds for reproduction.
v EROSION UPSTREAM CREATING LANDSLIDES AND ADDITIONAL SEDIMENTS
 
v QUALITY AND QUANTITY OF WATER REACHING AQUIFER IS EFFECTED
 
v POSSIBLE CONTAMINATION OF THE RIVER BY HYDROCARBONS AND OILS
 
v GOLFO DULCE: SEDIMENTATION IN MANGROVES AND REEFS

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