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Combining Ballast Water Treatment And Ballast Water Exchange: Reducing Colonization Pressure And Propagule Pressure Of Phytoplankton Organisms, Esteban M. Paolucci, Leila Ron, Hugh J. Macissaac
Combining Ballast Water Treatment And Ballast Water Exchange: Reducing Colonization Pressure And Propagule Pressure Of Phytoplankton Organisms, Esteban M. Paolucci, Leila Ron, Hugh J. Macissaac
Biological Sciences Publications
Species richness and species abundance (colonization pressure and propagule pressure, respectively) are commonly used to characterize invasion risk for ballast-water-mediated introductions, which can be high if either parameter is high. For practical reasons, the adopted IMO-D2 standard for organisms in discharged ballast water only considers total abundance of biological indicators, without consideration of species richness or source community. Here we explore the effect of ballast-water source, ballast water exchange, chlorination, or a combination of both (hybrid treatment) on both colonization pressure and propagule pressure for one IMO-D2 size class (≥10 µm and <50 >µm; phytoplankton). A strong reduction of propagule pressure …
Higher Colonization Pressure Increases The Risk Of Sustaining Invasion By Invasive Non-Indigenous Species, Hugh J. Macissaac, Mattias L. Johansson
Higher Colonization Pressure Increases The Risk Of Sustaining Invasion By Invasive Non-Indigenous Species, Hugh J. Macissaac, Mattias L. Johansson
Biological Sciences Publications
Considerable attention has been focused on the concept of Propagule Pressure (number of individuals introduced and introduction events) as a predictor of invasion success (975 papers). Much less well studied is the role of Colonization Pressure (number of species introduced; 24 studies), the complement of propagule pressure. Here we review the invasion history of the Laurentian Great Lakes to predict the risk of a future invasive (i.e. producing adverse ecological effects on other species) non-indigenous species based upon the number of species introduced (colonization pressure), using the recorded history of invasions in this system as our starting point. Historically, 52% …