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To be or not to be endangered? Listing of rare Hawaiian coral species called into question
Date:12/2/2010

Coral reef ecosystems are one of the most diverse habitats on the planet, providing habitat for a wide variety of marine animals. Unfortunately, coral reefs and their associated fish, algae, and invertebrate species are in worldwide decline. In 2009, 83 rare corals were petitioned to be listed under the United States Endangered Species Act. The National Oceanic and Atmospheric Administration (NOAA) National Marine Fisheries Service is currently reviewing the status of the coral on the petition. If the listing is granted, it will afford higher protection and designate critical habitat for these corals. But are all the 'species' on this list really species?

A challenge to the evaluation is that coral "species" definitions are presently based on the coral skeleton, which can be so variable that it is often difficult to distinguish between groups. All 83 species on the petition can be found in the United States with 9 corals found in Hawai'i. Identifying which of the corals on this list are endemic (unique to each region), rare, or at risk of extinction, may prove difficult because it is not clear which corals interbreed. Scientists at the Hawai'i Institute of Marine Biology (HIMB), an organized research unit in the University of Hawai'i at Mānoa's School of Ocean and Earth Science and Technology, examined the genetic and structural features of all the Hawaiian species from the common genus Montipora. Of these corals, three are under evaluation for listing under the Endangered Species Act (M. dilatata, M. flabellata, M. patula, more commonly known as Hawaiian Reef Coral, Blue Rice Coral, and Sandpaper Rice Coral). Surprisingly, researchers found that colony shape, color, and growth form can vary wildly, and may be misleading as to their species identity.

The seven Hawaiian coral species were found to belong to one of only four closely related genetic groups. Fine-scale measurements of the surface texture matched these genetic grou
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Contact: Carlie Wiener
cwiener@hawaii.edu
647-296-0491
University of Hawaii at Manoa
Source:Eurekalert  

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