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Protection of the East Maui Watershed and Local Grazing Lands A GIS Aerial-

CIG Projects in PIA | Pacific Islands Area NRCS
 CIG Projects in the Pacific Islands Area:

Protection of the East Maui Watershed and Local Grazing Lands: A GIS Aerial-Based Approach

Grantee: Tri-Isle Resource Conservation & Development

Miconia calvescens is a broad-leaf tree native to Central and South America which has invaded the islands of Maui and other islands in the Hawaiian chain, including Kauai, Oahu, and Hawaii. Miconia is widely recognized as the most invasive and ecosystem-modifying of all tropical weed species. Miconia reaches reproductive maturity in less than five years. A single tree produces 10 to 20 million seeds per year and seeds can remain viable in the soil for at least ten years before germinating. Seeds are spread by fruit-eating birds, and in contaminated soil adhering to hiking shoes, equipment, vehicles, and forest animals.

Miconia calvescens is an aggressive non-native plant that threatens Maui�s East Watershed and adjacent grazing lands. This project proposes to use a GIS-based approach to locate and control miconia on forest and grazing lands. Survey and control work will be conducted primarily by helicopter, using aerial management units to guide operations and ensure through coverage. Ground-based operations will supplement aerial work where use of helicopters may not be appropriate.

The project objectives are to:

  • Establish management units for aerial survey and control of Miconia calvescens around grazing lands and adjacent forested areas.
  • Systematically map the highly invasive Miconia calvescens within established management units, using an integrated GPS/GIS system.
  • Systematically remove miconia, using a GPS-GIS system to record the number, size and location of plants removed.
  • Work collaboratively with landowners to maintain project area clear of miconia.
  • Prevent inadvertent vectoring of miconia seeds from the project area using strict decontamination protocols.
  • Summarize and share results via preparation of a technical report.

   � Final Report (PDF; 1.38 MB)