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Ballast water risk assessment: principles, processes and methods


Barry, SC and Hayes, KR and Hewitt, CL and Behrens, HL and Dragsund, E and Bakke, SM, Ballast water risk assessment: principles, processes and methods, I C E S Journal of Marine Science, 65, (2) pp. 121-131. ISSN 1054-3139 (2008) [Refereed Article]

DOI: doi:10.1093/icesjms/fsn004


Two methods of assessing the risk of species introduction by ballast water are discussed, species-specific and environmental similarity assessments, each for alignment with four proposed principles of risk-based resource management: (i) society accepts that low risk scenarios exist; (ii) risk assessment is capable of identifying low risk scenarios; (iii) risk mitigation strategies exist; and (iv) mitigation costs are less than the cost of performing risk assessment. All four principles were met in some circumstances for both methods. Species-specific ballast water risk assessment is best suited to situations where the assessment can be restricted to a limited set of harmful species on journeys within bioregions where ballast water is a small component of natural genetic exchange. Environmental similarity risk assessment is appropriate for journeys that start and end in locations which have very little or no natural genetic exchange, such as journeys between non-contiguous bioregions. Because a large number of species are not assessed individually, environmental match assessments necessarily will be restricted to fundamental variables such as temperature and salinity. A number of bioregion classifications have been identified in the world's oceans, some of which at a scale that may be appropriate for ballast water management. The suitability of any particular classification, however, needs further examination.

Item Details

Item Type:Refereed Article
Research Division:Environmental Sciences
Research Group:Other environmental sciences
Research Field:Other environmental sciences not elsewhere classified
Objective Division:Environmental Policy, Climate Change and Natural Hazards
Objective Group:Environmental policy, legislation and standards
Objective Field:Trade and environment
UTAS Author:Hewitt, CL (Professor Chad Hewitt)
ID Code:52097
Year Published:2008
Web of Science® Times Cited:65
Deposited By:NC Marine Conservation and Resource Sustainability
Deposited On:2008-05-29
Last Modified:2015-02-08

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