Definition of "propagule"

Propagule size could be one of these silvical characteristics.

1989, Discovery and Innovation, Volumes 1-2, Academy Science Publishers, page 90

In many combinations of fungi and soils more than one method of estimating propagules will need to be used to provide a valid test of propagule numbers.

1992, I. C. Tommerup, “2: Methods for the Study of the Population Biology of Vesicular-arbuscular Mycorhizal Fungi”, in J. R. Norris, D. J. Read, A. K. Varma, editors, Methods in Microbiology, Volume 24: Techniques for the Study of Mycorrhiza, Academic Press, page 27

Combined with information on organism concentrations, this proxy could allow estimates of either total number of propagules per discharge or cumulative propagule supply over some temporal and spatial scale.

2011, Committee on Assessing Numeric Limits for Living Organisms in Ballast Water, Assessing the Relationship Between Propagule Pressure and Invasion Risk in Ballast Water, National Research Council of the National Academies, National Academies Press, page 126