Elevated levels of nitrogen and phosphorus reduce fertilisation success of gametes from scleractinian reef corals

Harrison, P. L. and Ward, S. (2001) Elevated levels of nitrogen and phosphorus reduce fertilisation success of gametes from scleractinian reef corals. Marine Biology, 139 6: 1057-1068. doi:10.1007/s002270100668


Author Harrison, P. L.
Ward, S.
Title Elevated levels of nitrogen and phosphorus reduce fertilisation success of gametes from scleractinian reef corals
Journal name Marine Biology   Check publisher's open access policy
ISSN 0025-3162
1432-1793
Publication date 2001
Sub-type Article (original research)
DOI 10.1007/s002270100668
Volume 139
Issue 6
Start page 1057
End page 1068
Total pages 12
Place of publication Heidelberg, Germany
Publisher Springer
Language eng
Abstract Spawned gametes were collected from colonies of Acropora longicyathus at One Tree Island and Goniastrea aspera at Magnetic Island, Great Barrier Reef, Australia, for use in fertilisation trials. Mean fertilisation rates were significantly reduced compared with controls (P < 0.003), when gametes from the branching coral A. longicyathus were exposed to elevated ammonium concentrations at 1 μM and above in one cross (60-64% reduction), and at 100 μM in another cross (16% reduction). Mean fertilisation success of A. longicyathus gametes was also significantly reduced compared with controls in both crosses (P = 0.000) at concentrations of 1 μm phosphate and above (35-75% reduction), and at 1 μm ammonium plus 1 μM phosphate and all higher concentrations (68-74% reduction). Similarly, the mean percentage of regular embryos that were developing normally was significantly reduced in most nutrient treatments compared with controls (P = 0.000). Fertilisation trials using gametes from the brain coral G. aspera resulted in a significantly lower percentage of regular embryos (P = 0.001) and a significantly higher percentage of deformed embryos (P = 0.001) developing after exposure to elevated nutrient treatments compared with controls. Mean fertilisation rates for this species were only significantly reduced (P = 0.034) in the 50 μM ammonium plus phosphate treatment in one cross (8% reduction), compared with the control. Therefore, ammonium and phosphate enrichment significantly impairs fertilisation success and embryo development in scleractinian reef corals.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Biological Sciences Publications
 
Versions
Version Filter Type
Citation counts: Scopus Citation Count Cited 51 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Mon, 08 Apr 2013, 21:22:19 EST by Selina Ward on behalf of School of Biological Sciences