Comparing and refining karst disturbance index methods through application in an island karst setting

Area of Science:

• Environmental Science
• Geology
• Ecology

Background:

• Karst environments are sensitive to anthropogenic impacts due to interconnected surface and subsurface systems.
• The Karst Disturbance Index (KDI) is a tool for assessing these impacts, with existing applications in Florida and Italy.
• The KDI requires further refinement for global application, especially in unique island settings.

Purpose of the Study:

• To test and refine the Karst Disturbance Index (KDI) in the vulnerable karst area of Arecibo, Puerto Rico.
• To compare the original and modified KDI methods in an island context.
• To identify necessary improvements and additional indicators for the KDI.

Main Methods:

• Applied and compared two common methods of the Karst Disturbance Index (KDI) in Arecibo, Puerto Rico.
• Evaluated the KDI's applicability and validity in a geographically isolated island karst setting.
• Identified specific indicators for KDI improvement, including Mogote Removal and Coastal Karst.

Main Results:

• Both KDI methods indicated high disturbance levels (Original: 0.54, Modified: 0.69).
• The study highlighted the need for additional indicators tailored to island karst environments.
• Significant considerations for improving the KDI's accuracy and scope were uncovered.

Conclusions:

• The Karst Disturbance Index (KDI) is a valuable tool for assessing disturbance in island karst settings.
• Modifications, including new indicators and adjusted weighting, are recommended for broader KDI application.
• The refined KDI can empower stakeholders to evaluate karst disturbance effectively, irrespective of expertise.