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Marine & Environmental Sciences Faculty Articles
Diversity and Biogeography of the Scleractinian Coral Fauna of Easter Island (Rapa Nui)
ORCID
0000-0002-6003-9324
ResearcherID
F-8807-2011
Document Type
Article
Publication Title
Pacific Science
ISSN
0030-8870
Publication Date
1-2007
Abstract
Three surveys at Easter Island (Rapa Nui) spanning the period 1999-2005, and examination of private and museum collections, have revealed a depauperate zooxanthellate scleractinian fauna. Collections were all made off island shelf exposures, from tide pools to 70 m with scuba, and by dredging to 100 m. With synonymies, reassignments, and two new records in the families Pocilloporidae and Faviidae, the Easter Island coral fauna now comprises 13 species. Pocilloporid and poritid coral abundances were generally high on all island shelves protected from southern swells. A cluster analysis of the coral fauna relationships of 19 south, central, and far-eastern Pacific sites indicates a strong affinity between those of Easter Island and the far-eastern Pacific equatorial region (e.g., Colombia, Ecuador, Panamá, and the Galápagos Islands). The precipitous drop in coral species richness from the Pitcairn Island group (61 species) to Easter Island suggests the presence of a dispersal barrier between these two remote southeastern Pacific areas, separated by ~1,800 km of deep ocean waters. Consideration of the surface circulation based on satellite-tracked surface drifters confirms this conclusion. Surface currents are from east to west along the topography on which Easter and Sala-y-Gómez Islands sit, suggesting a substantial barrier to recruitment from the west.
DOI
10.1353/psc.2007.0005
Volume
61
Issue
1
First Page
67
Last Page
90
Additional Comments
National Geographic Society grant #: 6047-97; NSF grant #s: OCE-0002317, OCE-0036525000, OCE-0119976; NOAA grant #: NA16OA1443
NSUWorks Citation
Peter W. Glynn, Gerard M. Wellington, Bernhard Riegl, Donald B. Olson, Eric Borneman, and Evie A. Wieters. 2007. Diversity and Biogeography of the Scleractinian Coral Fauna of Easter Island (Rapa Nui) .Pacific Science , (1) : 67 -90. https://nsuworks.nova.edu/occ_facarticles/310.
Comments
©2007 by University of Hawai'I Press