Gulf Coast's Ecological Heritage at RiskThe Gulf Statesspacer
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Confront the Challenge
• Climate in the Gulf
• The Report
• For Teachers

Discover the Solutions
• Overview
• Slow the Change
• Speed our Response

Explore the Impacts
• Overview
• Water Resources
• Sea-Level Change
• Human Perspectives

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Florida
Florida Panther
Introduction
Climate Projections
Freshwater Resources
Agriculture
Forestry
Coastal Development
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Unique Habitats
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Freshwater Resources
Florida is currently facing a growing demand for freshwater resources. Freshwater is needed for urban residential and industrial uses, irrigation, the prevention of saltwater intrusion in coastal aquifers, and the maintenance of healthy aquatic ecosystems. Demand for fresh water will rise as Florida's population increases. Competing demands on limited water resources due to growth alone will increase freshwater management challenges with or without climate change. Climate change could complicate this situation, since any change in rainfall, evaporation, groundwater recharge rates, and runoff patterns would affect ecosystems and all users of fresh water. For example:

  • Greater freshwater losses because of increased temperatures and evaporation will magnify the water resource challenges of the future if rainfall stays at current levels.

  • Water control structureA trend of more extreme rainfall events has already been detected. Extreme runoff from these events can produce overload on the sewage systems with resulting septic contamination of surface and coastal waters.

  • Drought conditions would exacerbate the formation of sinkholes, a natural feature of limestone geology.

  • Where rainfall amounts decline, especially during critical times of the growing season, drought and widespread freshwater shortages could increase. Restrictions on the water use and withdrawal from aquifers—already occurring periodically today—could become more common.

  • Sabal PalmWhere saltwater intrudes into coastal groundwater sources due to sea-level rise, freshwater resources could be further affected. Where saltwater intrudes into freshwater marshes, vegetation with low salt tolerance—such as the Sabal Palm—would be decimated.

  • Higher water temperatures impact aquatic ecosystems by changing aquatic food webs and species communities. Higher water temperatures also reduce the amount of dissolved oxygen in the water, diminishing water quality, and in extreme cases, leading to fish kills.


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Photo Credits:
Panther - South Florida Water Management District.
Water control structure - South Florida Water Management District.
Sabal Palm - U. S. Geological Survey.
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