Coral Reefs

, Volume 26, Issue 3, pp 679–687 | Cite as

Vertical zonation of megabenthic taxa on a deep photosynthetic reef (50–140 m) in the Au’au Channel, Hawaii

  • S. E. Kahng
  • C. D. Kelley


This study surveyed several locations at depths between 50 and 140 m within the Au’au Channel, Hawaii to characterize the deep reef habitat and determine the depth distribution and relative abundance of the dominant, habitat forming megabenthic taxa. In the Au’au Channel, the depth distribution of megabenthic taxa exhibited a pattern of vertical zonation with relatively few taxa dominating each zone. Macroalgae particularly Halimeda spp. and to a lesser extent scleractinian corals Leptoseris spp. were dominant between 50 and 80 m; Leptoseris spp. were dominant between 80 and 90 m as macroalgae decreased in abundance; the invasive octocoral Carijoa riisei was dominant between 90 and 100 m primarily on rugose features; Antipathes spp. and Leptoseris spp. were dominant between 100 and 120 m on exposed fossil reef; and small wire corals were dominant between 120 and 140 m. In general, the percentage of live benthic cover decreased with depth, particularly below 90 m where a large majority of the area was uncolonized, soft substrata. The gradient of downwelling light intensity appears to play a major role in regulating the depth distribution of photosynthetic organisms, skilophilous organisms, and other benthic fauna, which compete for space with dominant photosynthetic species. The depth of the seasonal thermocline also appears to play an important role in limiting the distribution of tropical benthic species.


Deep coral reef Community structure Vertical zonation Leptoseris Antipathes Halimeda 



We gratefully acknowledge the support of this research by grants from the Hawaii Undersea Research Laboratory (HURL) and the National Oceanic and Atmospheric Administration, Project # R/CR-8, sponsored by the University of Hawaii Sea Grant College Program, SOEST, under Institutional Grants No. NA05OAR4171048 from NOAA Office of Sea Grant, Department of Commerce. The views expressed herein are those of the authors and do not necessarily reflect the views of NOAA or any of its subagencies. Special thanks to E. Hochberg for assistance with the optical data and H. Spalding for assistance with macroalgae taxonomy.


  1. Agegian CR, Abbott IA (1985) Deep water macroalgal communities: A comparison between Penguin Bank (Hawaii) and Johnston Atoll. Proc 5th Int Coral Reef Symp 5:47–50Google Scholar
  2. Boland RC, Parrish FA (2005) Description of fish assemblages in the black coral beds off Lahaina, Maui, Hawaii. Pac Sci 59:411–420CrossRefGoogle Scholar
  3. Coles SL, Fadlallah YF (1991) Reef coral survival and mortality at low temperatures in the Arabian Gulf: new species-specific lower temperature limits. Coral Reefs 9:231–237CrossRefGoogle Scholar
  4. Colin PL, Devaney DM, Hillis-Colinvaux L, Suchanek TH, Harrison JT (1986) Geology and biological zonation of the reef slope, 50–360 m depth at Enewetak Atoll, Marshall Islands. Bull Mar Sci 38:111–128Google Scholar
  5. Fletcher C, Sherman C (1995) Submerged Shorelines on O’ahu, Hawai’i: archive of episodic transgression during the deglaciation. J Coast Res 17:141–152Google Scholar
  6. Fricke HW, Knauer B (1986) Diversity and spatial pattern of coral communities in the Red Sea upper twilight zone. Oecologia 71:29–37CrossRefGoogle Scholar
  7. Fricke H, Meischner D (1985) Depth limits of Bermudan scleractinian corals: a submersible survey. Mar Biol 88:175–187CrossRefGoogle Scholar
  8. Fricke HW, Vareschi E, Schlichter D (1987) Photoecology of the coral Leptoseris fragilis in the Red Sea twilight zone (an experimental study by submersible). Oecologia 73:371–381CrossRefGoogle Scholar
  9. Grigg RW (1965) Ecological studies of black coral in Hawaii. Pac Sci 19:244–260Google Scholar
  10. Grigg RW (1976) Fisheries management of precious and stony corals in Hawaii. UNIHI-SEAGRANT-TR77–03. University of Hawaii Sea Grant, Honolulu, p 48Google Scholar
  11. Grigg RW (2001) Black coral: history of sustained fishery in Hawai’i. Pac Sci 55:291–299CrossRefGoogle Scholar
  12. Grigg RW (2004) Harvesting impacts and invasion by an alien species decrease estimates of black coral yield off Maui, Hawai’i. Pac Sci 58:1–6CrossRefGoogle Scholar
  13. Grigg RW, Grossman EE, Earle SA, Gittings SR, Lott D, McDonough J (2002) Drowned reefs and antecedent karst topography, Au’au Channel, S.E. Hawaiian Islands. Coral Reefs 21:73–82Google Scholar
  14. Hillis-Colinvaux L (1986a) Deep water populations of Halimeda in the economy of an Atoll. Bull Mar Sci 38:155–169Google Scholar
  15. Hillis-Colinvaux L (1986b) Halimeda growth and diversity on the deep fore-reef of Enewetak Atoll. Coral Reefs 5:19–21CrossRefGoogle Scholar
  16. Jones AT (1993) Review of the chronology of marine terraces in the Hawaiian Archipelago. Quaternary Sci Rev 12:811–823CrossRefGoogle Scholar
  17. Kahng SE (2006) Ecology and ecological impact of an alien octocoral, Carijoa riisei, in Hawaii. PhD thesis, University of Hawaii, p 284Google Scholar
  18. Kahng SE, Grigg R (2005) Impact of an alien octocoral, Carijoa riisei, on black corals in Hawaii. Coral Reefs 24:556–562CrossRefGoogle Scholar
  19. Kahng SE, Maragos JE (2006) The deepest zooxanthellate, scleractinian corals in the world? Coral Reefs 25:254CrossRefGoogle Scholar
  20. Kleypas JA, McManus JW, Menez LAB (1999) Environmental limits to coral reef development: Where do we draw the line? Am Zool 39:146–159Google Scholar
  21. Lang JC (1974) Biological zonation at the base of a reef. Am Sci 62:272–281Google Scholar
  22. Liddell WD, Ohlhorst SL, Boss SK (1988) The significance of Halimeda as a space-occupier and sediment-producer, 1–750 m, North Jamaica. Proc 6th Int Coral Reef Symp 3:127–132Google Scholar
  23. Littler MM, Littler DS, Blair SM, Norris JN (1985) Deepest known plant life discovered on an uncharted seamount. Science 227:57–59CrossRefGoogle Scholar
  24. Littler MM, Littler DS, Blair SM, Norris JN (1986) Deep-water plant communities from an uncharted seamount off San Salvador Island, Bahamas: Distribution, abundance, and primary productivity. Deep-Sea Res 33:881–892CrossRefGoogle Scholar
  25. Maragos JE, Jokiel P (1986) Reef corals of Johnston Atoll: one of the world’s most isolated reefs. Coral Reefs 4:141–150CrossRefGoogle Scholar
  26. Reed JK (1985) Deepest distribution of Atlantic hermatypic corals discovered in the Bahamas. Proc 5th Int Coral Reef Symp 6:249–254Google Scholar
  27. Schlichter D, Meier U, Fricke H (1994) Improvement of photosynthesis in zooxanthellate corals by autofluorescent chromatophores. Oecologia 99:124–131CrossRefGoogle Scholar
  28. Wolanski E, Colin P, Naithani J, Deleersnijder E, Golbuu Y (2004) Large amplitude, leaky, island generated, internal waves around Palau, Micronesia. Estuar Coast Shelf Sci 60:705–716CrossRefGoogle Scholar
  29. Yamano H, Hori K, Yamauchi M, Yamagawa O, Ohmura A (2001) Highest-latitude coral reef at Iki Island, Japan. Coral Reefs 20:9–12CrossRefGoogle Scholar

Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  1. 1.Department of OceanographyUniversity of HawaiiHonoluluUSA
  2. 2.Hawaii Undersea Research LaboratoryUniversity of HawaiiHonoluluUSA

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