Publications

Kahng and Grigg 2005


scientific_article | Coral Reefs

Impact of an alien octocoral, Carijoa riisei, on black corals in Hawaii

Kahng SE, Grigg RW


Www fec836ca290318f37dc3ecd481f22b98faf488d5ddef687807ca6b76d8e893ed
Gscholar 58dd9f05df3b8d1811d087e8507325500777053d6677b471fd75373a30a4cee1

Abstract

In 2001 Carijoa riisei, an octocoral native to the tropical Western Atlantic, was discovered overgrowing black corals in the Au’au Channel in Hawaii. In this paper data from a 2001 survey are reanalyzed and combined with new data from 2003 and 2004 to assess the ecological impact in greater detail. C. riisei differentially affected reproductively mature black coral colonies with maximum impact between 80 and 105 m. The pattern of C. riisei over growth on black corals and C. riisei on the substrata appears to be bounded by high irradiance in shallow water and cold temperature in deep water. Evidence suggests that the C. riisei settlement on black corals is facilitated by other epifauna. Once established, C. riisei spreads vegetatively and smothers the coral. The success of the C. riisei invasion appears to be unaided by anthropogenic disturbance and is at least partially attributable to Hawaii’s depauperate shallow-water (<100 m) octocoral fauna.

Research sites

10.1007   s00338 005 0026 0
Keywords
Adobe pdf disabled addd0070fc849240f18943197db4226a4caf211ae987143710823268485043aa
Log-in to access PDFs


Meta-data
Depth range
30- 115 m

Mesophotic “relevance”
0x mentions

Word count
3439 words

Fields
Ecology

Research focus
Alcyonacea (Soft Corals) Antipatharia (Black Corals)

Locations
Hawaii

Research platforms
Remotely Operated Vehicle (ROV) Manned Submersible
Author profiles
Sam Kahng ( 15 pubs)
Research sites (dec deg)
Hawaii
Au'au Channel
Lat: 20.856 Long: -156.731