Propagule pressure (also termed introduction effort) is a composite measure of the number of individuals of a species released into a region to which they are not native. It incorporates estimates of the absolute number of individuals involved in any one release event (propagule size) and the number of discrete release events (propagule number). As the number of releases or the number of individuals released increases, propagule pressure also increases. Propagule pressure can be defined as the quality, quantity, and frequency of invading organisms (Groom, 2006). Propagule pressure is a key element to why some introduced species persist while others do not (Lockwood, 2005). Species introduced in large quantities and consistent quantities prove more likely to survive, whereas species introduced in small numbers with only a few release events are more likely to go extinct (Lockwood, 2005). Propagule pressure is a composite measure to the number of individuals released into a non-native region (Lockwood, 2005). Three approaches are used to study and measure propagule pressure. One approach introduces a specific amount of propagules into controlled plots. A second approach allows introduced species to mature and colonize naturally while observing native and non-native species during the colonization. The final approach used to study and measure propagule pressure utilizes records of the numbers of individuals introduced, including natural introductions and intentional introductions (Colautti et al., 2003).
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Propagulepressure (also termed introduction effort) is a composite measure of the number of individuals of a species released into a region to which they...
Look up propagule in Wiktionary, the free dictionary. In biology, a propagule is any material that functions in propagating an organism to the next stage...
through a landscape. Because of its very high dispersal capacity, "propagulepressure" from its regional presence will let it quickly colonize a disturbed...
highways, offer repeated opportunities for establishment (a high propagulepressure). In ecosystems, the availability of resources determines the impact...
so that invasion success would depend on the rate of introduction (propagulepressure) as well as the traits possessed by the organism. The most recent...
have been criticised as mono-causal. "Overall, we expect that low propagulepressure, abiotic stresses, biotic resistance, and a paucity of specific symbionts...
T.; Hulme, Philip E. (2009). "Relative Roles of Disturbance and PropagulePressure on the Invasion of Humid Tropical Forest byCordia alliodora(Boraginaceae)...
that do represent repeated and larger introductions that generate propagulepressure. Among the many explanations for invasive success, however, the enemy...
than for her first destination. Assessing the Relationship Between PropagulePressure and Invasion Risk in Ballast Water. Washington, D.C.: National Academies...
invasion resistance: The use of recruitment functions to control for propagulepressure". Ecology. 95 (4): 920–929. doi:10.1890/13-0655.1. hdl:10182/7461...
commercial activities will change human transport and increase the propagulepressure of some non-native species from zero, e.g., connecting new regions...
highly dependent on salinity and sediment type and no biotic factors. Propagulepressure is a composite measure of the number of individuals of a species released...
National Research Council (2011). Assessing the Relationship Between PropagulePressure and Invasion Risk in Ballast Water (Report). Washington, D.C.: National...
Lockwood; Phillip Cassey; Tim Blackburn (May 1, 2005). "The role of propagulepressure in explaining species invasions". Trends in Ecology & Evolution. 20...
seagrass propagules has so far demonstrated low and variable outcomes, with more than 90% of propagules failing to survive. For propagules to be successfully...
fungi in soil. Watson and Ford defined fungistasis as "when viable fungal propagules, which are not subject to endogenous or constitutive dormancy do not germinate...
associate) Buttonwoods grow 39 to 46 feet tall but do not produce a true propagule in Florida. Tiny brownish flowers are located at the terminal ends of...
itself from the flower stalk but germinates where it is and is known as a propagule. It grows into a slightly curved cylinder up to 15 centimetres (5.9 in)...
basidiospores, measuring 4–7 by 3–5 μm. Small, brownish sclerotia (hyphal propagules) are also formed, arising from the hyphae. Agroathelia rolfsii occurs...
Progress Series 147: 11–19. Martin, K.L.; A.L. Carter (2013). "Brave New Propagules: Terrestrial Embryos in Anamniotic Eggs". Integrative and Comparative...
('breeding dispersal'). Dispersal is also used to describe the movement of propagules such as seeds and spores. Technically, dispersal is defined as any movement...
budding for one/two/many respectively. bulbil A compact multicellular propagule, with its thin-walled, undifferentiated cells produced in acropetal succession...
crop rotation with rice and vegetables. This system is applicable if the propagule (small piece of rhizome) can be planted early in the year. The rhizomes...
Bruguiera and Nypa) to form a propagule (a ready-to-go seedling) which can produce its own food via photosynthesis. The mature propagule then drops into the water...
reproducing asexually through clonal propagation, transplanting rhizome propagules into cultivated settings is possible. Seed propagation is also feasible...
pulmonaria has the ability to form both vegetative propagation and sexual propagules at an age of about 25 years. In sexual reproduction, the species produces...
cost to their host (e.g., via damage to their reproductive organs or propagules, denying the services of a beneficial partner), their net effect on host...
growing season (e.g. in the winter). This involves exposing a seed or other propagule, or a mature perennial plant, to a specific sequence of carefully controlled...
off the trees. Mycopesticides include fungi and fungi cell components. Propagules such as conidia, blastospores, chlamydospores, oospores, and zygospores...
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