Discharge of ballast residual sediments during de-ballasting procedures: A more realistic estimate of propagule pressure.

Autor: Simard N; Maurice-Lamontagne Institute, Fisheries and Oceans Canada, 850 route de la Mer, Mont-Joli, QC G5H 3Z4, Canada., Weise AM; Maurice-Lamontagne Institute, Fisheries and Oceans Canada, 850 route de la Mer, Mont-Joli, QC G5H 3Z4, Canada., Rochon A; Institut des Sciences de la Mer, Université du Québec à Rimouski, 310 Allée des Ursulines, Rimouski, QC G5L 3A1, Canada., Briski E; GEOMAR Helmholtz Centre for Ocean Research Kiel, Wischhofstraße 1-3, 24148 Kiel, Germany., MacIsaac HJ; Great Lakes Institute for Environmental Research, University of Windsor, Windsor, ON N9B 3P4, Canada., McKindsey CW; Maurice-Lamontagne Institute, Fisheries and Oceans Canada, 850 route de la Mer, Mont-Joli, QC G5H 3Z4, Canada. Electronic address: Chris.McKindsey@dfo-mpo.gc.ca.
Jazyk: angličtina
Zdroj: Marine pollution bulletin [Mar Pollut Bull] 2024 Oct; Vol. 207, pp. 116716. Date of Electronic Publication: 2024 Sep 01.
DOI: 10.1016/j.marpolbul.2024.116716
Abstrakt: Ship ballast residual sediments are an important vector of introduction for non-indigenous species. We evaluated the proportion of residual sediments and associated organisms released during de-ballasting operations of a commercial bulk carrier and estimated a total residual sediment accumulation of ∼13 t, with accumulations of up to 20 cm in some tank areas that had accumulated over 11 years. We observed interior hull-fouling (anemones, hydrozoans, and bryozoans) and high abundances of viable invertebrate resting stages and dinoflagellate cysts in sediments. Although we determined that <1 % of residual sediments and associated resting stages were resuspended and released into the environment during individual de-ballasting events, this represents a substantial inoculum of 21 × 10 7 viable dinoflagellate cysts and 7.5 × 10 5 invertebrate resting stages with many taxa being nonindigenous, cryptogenic, or toxic/harmful species. The methods used and results will help estimate propagule pressure associated with this pathway and will be relevant for residual sediments and nonindigenous species management.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Crown Copyright © 2024. Published by Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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