Measuring Propagule Pressure
The total probability of establishment (E) can be determined using this equation. It considers the fact that each propagule has an independent chance of establishment:
(E) is the total probability of establishment (p) is the probability of a one propagule establishing (N) is the # of propagules arriving at specific location at a certain time (l) is the location (t) is the time
- It is to be noted that the equation can also be written as the standard asymptotic curve (sometimes termed the independence model):
Alpha=shape coefficient which is equivalent to –ln(l – p).
Measures of propagule pressure are have been shown to have specific relationships with the probability of establishment.(Leung et al. 2004)
Read more about this topic: Propagule Pressure
Famous quotes containing the words measuring and/or pressure:
“Man always made, and still makes, grotesque blunders in selecting and measuring forces, taken at random from the heap, but he never made a mistake in the value he set on the whole, which he symbolized as unity and worshipped as God. To this day, his attitude towards it has never changed, though science can no longer give to force a name.”
—Henry Brooks Adams (1838–1918)
“Osteopath—One who argues that all human ills are caused by the pressure of hard bone upon soft tissue. The proof of his theory is to be found in the heads of those who believe it.”
—H.L. (Henry Lewis)