Are increased nutrient inputs responsible for more outbreaks of crown-of-thorns starfish? an appraisal of the evidence
Brodie, Jon, Fabricius, Katharina, De'ath, Glenn, and Okaji, Ken (2005) Are increased nutrient inputs responsible for more outbreaks of crown-of-thorns starfish? an appraisal of the evidence. Marine Pollution Bulletin, 51 (1-4). pp. 266-278.
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The cause(s) of primary outbreaks of the coral-eating crown-of-thorns starfish (Acanthaster planci) are still subject to scientific controversy. The possibility of primary outbreaks being linked to terrestrial runoff has been postulated a number of times, suggesting that enhanced nutrient supply is critical for enhanced A. planci larval development. This paper examines the evidence for such a cause, focusing particularly on the Great Barrier Reef (GBR). Nutrient discharges from rivers have increased at least four-fold in the central GBR over the last century, and concentrations of large phyto-plankton (>2um) of the inshore central GBR shelf in the wet season when A. planci larvae develop, is double that of other places and times. Larval development, growth and survival increase almost ten-fold with doubled concentrations of large phyto-plankton. This and other lines of evidence suggest that frequent A. planci outbreaks on the GBR may indeed be a result of increased nutrient delivery from the land.
|Item Type:||Article (Refereed Research - C1)|
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|Keywords:||crown-of-thorns starfish, nutrient runoff, Great Barrier Reef, phytoplankton, Acanthaster|
|FoR Codes:||06 BIOLOGICAL SCIENCES > 0602 Ecology > 060205 Marine and Estuarine Ecology (incl Marine Ichthyology) @ 100%|
06 BIOLOGICAL SCIENCES > 0602 Ecology > 060205 Marine and Estuarine Ecology (incl Marine Ichthyology) @ 0%
06 BIOLOGICAL SCIENCES @ 0%
|SEO Codes:||96 ENVIRONMENT > 9609 Land and Water Management > 960999 Land and Water Management of Environments not elsewhere classified @ 100%|
|Deposited On:||03 Oct 2007|
|Last Modified:||25 May 2013 00:22|
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