![]() |
![]() |
|||||||
|
||||||||
|
USGS Looks at Moloka'i's Coral Reefs
In mid-April, a team of scientists from several USGS offices visited Moloka'i as part of a new investigation into the condition of the reefs along the south coast of the island. According to Mike Field (Menlo Park and Monterey Bay Office), chief scientist for the project, "The coral reefs along the south coast of Moloka'i are richly diverse and are the most extensive in the Hawaiian Islands. They are a valuable resource to the people of Hawai'i, and we are making efforts to map the reef and evaluate its health." Pat Chavez (Flagstaff) is guiding the remote-sensing aspect of the project and was on hand with specially processed aerial photographs for use in reconnaissance ground control. Of particular interest to the team is the amount of muddy sediment delivered to the reef by erosion and runoff. Large amounts of mud can affect the health and growth of corals, which in turn can affect the health and abundance of fish and crustaceans on the reef. Mike Bothner and Peter Gill (Woods Hole) took core samples from sites along the south coast to help characterize the history of sediment runoff. Layers of mud and sand in the cores, especially from those samples taken in the ancient fishponds (which have been trapping mud for decades), will be analyzed to provide insight about the recent history of sediment runoff. Mike Field and Hank Chezar (Menlo Park) collected aerial video footage and photographs of the entire south coast to help get an overview of the shoreline and to look for runoff plumes. With the help of Susan Cochran (Monterey Bay Office), they also took underwater video footage and photos for the purpose of mapping the coral reefs. Future studies will include researchers from the University of Hawai'i and the WRD office in Honolulu. The team was encouraged by the favorable reception they received from the community. Local residents expressed their excitement about the project in various ways. From discussions resulting in valuable insights, to a mention in the local high-school newsletter, their hospitality and enthusiasm was endless.
|
![]() |
![]() in this issue:
Moloka'i Coral Reefs George's Bank Moorings: Photo Essay
![]() |