Effect of nutrient enrichment on the complementary (secondary) metabolite composition of the soft coral Sarcophyton ehrenbergi (Cnidaria: Octocorallia: Alcyonaceae) of the Great Barrier Reef

2000 ◽  
Vol 136 (1) ◽  
pp. 63-68 ◽  
Author(s):  
B. G. Fleury ◽  
J.C. Coll ◽  
E. Tentori ◽  
S. Duquesne ◽  
L. Figueiredo
Keyword(s):  
Great Barrier Reef ◽  
Secondary Metabolite ◽  
Nutrient Enrichment ◽  
Soft Coral ◽  
Barrier Reef

Two new species of alcyonacean-associated shrimp genus Alcyonohippolyte Marin, Okuno & Chan, 2010 (Crustacea: Decapoda: Hippolytidae) from the Great Barrier Reef of Australia

Zootaxa ◽  
2011 ◽  
Vol 3123 (1) ◽  
pp. 49 ◽  
Author(s):  
IVAN MARIN
Keyword(s):  
New Species ◽  
Great Barrier Reef ◽  
Soft Coral ◽  
Barrier Reef ◽  
Lizard Island ◽  
Two New Species ◽  
Organ Pipe ◽  
Antennular Peduncle

Two new species of symbiotic hippolytid shrimps of the genus Alcyonohippolyte Marin, Okuno & Chan, 2010 are described from Lizard Island, the Great Barrier Reef of Australia. Alcyonohippolyte tenuicarpus sp. nov. is associated with xeniid soft coral of the genus Heteroxenia Kolliker, 1874 and differs from the congeners by a long rostrum greatly exceeding antennular peduncle and slender carpal segments of pereiopod II. Alcyonohippolyte tubiporae sp. nov. is associated with organ pipe coral of the genus Tubipora Linnaeus, 1758, possibly T. musica Linnaeus, 1758 (Alcyonacea: Tubiporidae), and differs from the congeners by equal distal and proximal carpal segments of pereiopod II. Both species can be clearly separated from the congeners ecologically and by coloration.

Predation on soft corals (Octocorallia: Alcyonacea) on the Great Barrier Reef, Australia

1994 ◽  
Vol 45 (7) ◽  
pp. 1281 ◽  
Author(s):  
JK Griffith
Keyword(s):  
Great Barrier Reef ◽  
Soft Coral ◽  
Barrier Reef ◽  
Soft Corals ◽  
Quantitative Evidence ◽  
Bite Marks ◽  
First Time ◽  
Predation Rates

Quantitative evidence on predation rates on soft corals is presented for the first time. These measured predation rates were low. Less than 1% of the soft coral colonies present in mapped areas at Heron Island and Beaver Reefs had bite marks. Evidence suggests that over 51% of these bite marks were more than two months old. Predators included the mollusc Ovula ovum and two species of chaetodontid fishes that have not been recorded before as feeding on soft corals.

Occurrence of aggressive mechanisms during interactions between soft corals (Octocorallia : Alcyoniidae) and other corals on the Great Barrier Reef, Australia

1997 ◽  
Vol 48 (2) ◽  
pp. 129 ◽  
Author(s):  
J. K. Griffith
Keyword(s):  
Coral Reef ◽  
Great Barrier Reef ◽  
Soft Coral ◽  
Barrier Reef ◽  
Soft Corals ◽  
Acanthaster Planci ◽  
Coral Reef Community ◽  
Reef Community ◽  
Coral Colony ◽  
Factors Influencing

This study found that on two reefs of the Great Barrier Reef, Australia, most coral colonies within 10 cm of a soft coral colony were interacting to the detriment of one or both colonies. Soft corals were more likely to interact with neighbouring hard corals than with other soft corals. The relative infrequency of ties indicated that two coral colonies were rarely equal competitively. Allelopathy and simple overgrowth were the major aggressive mechanisms of alcyoniids. Soft corals tended to simply overgrow neighbouring hard corals but used allelochemicals more frequently when the neighbour was another soft coral. Other factors influencing the type of aggressive mechanism used included the size of the neighbouring colony. The importance of this to a coral reef community after events such as Acanthaster planci infestations is discussed.

A MODEL OF ALLELOCHEMICAL INTERACTIONS BETWEEN SOFT AND SCLERACTINIAN CORALS ON THE GREAT BARRIER REEF

1993 ◽  
Vol 01 (01) ◽  
pp. 1-17 ◽  
Author(s):  
P.L. ANTONELLI ◽  
P.W. SAMMARCO ◽  
J.C. COLL
Keyword(s):  
Great Barrier Reef ◽  
Soft Coral ◽  
Cost Effective ◽  
Scleractinian Corals ◽  
Toxic Effects ◽  
Barrier Reef ◽  
Central Question ◽  
Soft Corals ◽  
Allelopathic Interactions ◽  
Community Production

The mathematical theory of Volterra-Hamilton systems developed for modelling allelopathic interactions in sessile communities, is utilized here to model cost of terpene production of colonizing soft corals and their highly toxic effects on scleractinian corals of the Great Barrier Reef. The central question asked is what strategies of hard corals, if any, would enable them to survive colonization. Several detailed results are obtained relating quantitative measures of terpene production (v), soft coral encroachment (µ), allelopathic vigour (–K) and community production stability. The model predicts that any factor which reduces soft coral encroachment (which includes direct toxic effects) has survival value. Thus, spatial shapes and distributions of scleractinians or refuge in space, in themselves, may constitute viable “cost-effective” competitive defenses. It is unlikely, however, that scleractinian corals could evolve in such a way as to specifically neutralize terpenes directly, according to this model, although their species-specifically variable resistance to their effects can be accounted for.

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