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The effects of prolonged darkness on temperate and tropical marine phytoplankton, and their implications for ballast water risk management

DRS at CSIR-National Institute of Oceanography

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Title The effects of prolonged darkness on temperate and tropical marine phytoplankton, and their implications for ballast water risk management
 
Creator Carney, K.J.
Delany, J.E.
Sawant, S.S.
Mesbahi, E.
 
Subject Phytoplankton
Dark incubation
Ballast water
Risk assessment
 
Description Phytoplankton assemblages from tropical (Goa) and temperate (UK) locations were exposed to a 28 day dark period, followed by a period of re-exposure to light. During this time phytoplankton survival and changes in nutrient concentrations were mapped. The tropical plankton water samples showed high nutrient levels after the dark period which were utilised by cells during the re-exposure period. UK experiments looked at the effect of three different water types on population recovery after the 28 day dark period, and differences due to seasonal effects. The population growth observed during the re-exposure period in the tropical population was comparable to that of the temperate population. Water type affected recovery and of the three tested media fresh seawater promoted the highest levels of growth. Seasonality had a significant influence on species survival. Understanding the effects of all these factors can aid the development of effective risk assessments in ballast water management.
 
Date 2011-07-08T09:03:20Z
2011-07-08T09:03:20Z
2011
 
Type Journal Article
 
Identifier Marine Pollution Bulletin, vol.62(6); 2011; 1233-1244p.
http://drs.nio.org/drs/handle/2264/3880
 
Language en
 
Rights An edited version of this paper was published by Elsevier. Copyright [2011] Elsevier.
 
Publisher Elsevier