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A review of the molecular evidence for ballast water introduction of the toxic dinoflagellates Gymnodinium catenatum and the Alexandrium 'tamarensis complex' to Australiasia

Citation

Bolch, CJS and de Salas, MF, A review of the molecular evidence for ballast water introduction of the toxic dinoflagellates Gymnodinium catenatum and the Alexandrium 'tamarensis complex' to Australiasia, Harmful Algae, 6, (4) pp. 465-485. ISSN 1568-9883 (2007) [Refereed Article]

DOI: doi:10.1016/j.hal.2006.12.008

Abstract

The potential of ballast water to act as a major introduction vector for toxic dinoflagellates and other phytoplankton is beyond doubt; however, evidence that links the suspected introduced species with a source population is less convincing, especially without supporting historical and biochemical data, or consideration of palaeobiogeographical scenarios that may explain current species distributions. This paper presents new molecular data based on LSU-rDNA and rDNA-ITS sequences that demonstrate an unequivocal and recent link between Temperate Asian and Australasian populations of the toxic dinoflagellates Gymnodinium catenatum and toxic strains of the Alexandrium "tamarensis complex". We integrate our data with supporting evidence from historical distribution records, sediment dating studies, toxin profiles, mating studies and previous molecular studies. We contrast the observed patterns of genetic and biochemical variation with those expected from various palaeobiogeographical scenarios explaining the evolution and natural dispersal of both species. While definitive proof is impossible, the total evidence indicates that these toxic dinoflagellates were introduced to Australasia during the past 100 years, most probably via ballast water from bulk-cargo shipping from Japan and/or south-east Asia. © 2007 Elsevier B.V. All rights reserved.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Marine and Estuarine Ecology (incl. Marine Ichthyology)
Objective Division:Environment
Objective Group:Control of Pests, Diseases and Exotic Species
Objective Field:Control of Pests, Diseases and Exotic Species in Marine Environments
Author:Bolch, CJS (Dr Christopher Bolch)
Author:de Salas, MF (Dr Miguel de Salas)
ID Code:51141
Year Published:2007
Web of Science® Times Cited:63
Deposited By:TAFI - Aquaculture
Deposited On:2007-08-01
Last Modified:2008-04-05
Downloads:0

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