Assessing the Relationship Between Propagule Pressure and Invasion Risk in Ballast Water (2011) / Chapter Skim
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Pages 137-140
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From page 137... ...
in the context of reducing invasions, ballasting practices designed to minimize the uptake or discharge of living organisms; techniques or treatments designed to remove, kill or inactivate prior to their discharge, organisms inadvertently taken up when water is brought into tanks or ballasted holds; (2) independent of invasion biology considerations, the movement of water into and out of ships' ballast tanks and ballasted holds in such a way as to maximize stability and safety of the ship, its crew, and cargo.
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From page 138... ...
metapopulations -- spatially separated populations of the same species that are linked by dispersal. microorganism -- a wide variety of microscopic organisms consisting of a single cell or cell cluster; includes viruses, which are not cellular (Madigan and Martinko, 2006)
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From page 139... ...
It expresses the number of species that establish as a function of the large-scale release of a varying number of varying species at varying densities. The relationship between invasion risk and propagule pressure is generally held to be positive although the shape of the curve may vary considerably.
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From page 140... ...
. vector strength -- the relative number or rate of established invasions that result within a specified time period from a given vector in a particular region (Carlton and Ruiz, 2005)
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