The Role of Propagule Pressure in Explaining Species Invasions.¶
Lockwood, J. L., Cassey, P., & Blackburn, T. (2005). The Role of Propagule Pressure in Explaining Species Invasions. Trends in Ecology & Evolution, 20(5), 223-228.
Cited by¶
3 citations across 3 artifacts.
Each citation links to the sentence it supports in the citing article.
Primes¶
- Beachhead Market
- Policy and program pilots: a single jurisdiction or hospital is chosen narrowly so resources concentrate and learning is extracted, with later expansion exploiting demonstrated results and political legitimacy. Invasive-species ecology: a beachhead population establishes in a disturbed margin, builds numbers and local adaptation, and spreads, with propagule-pressure thresholds governing establishment.
This sourceEstablishes propagule pressure as the driver of invasive-species establishment, supporting the finding that multiple smaller introductions outperform one large one.
- Policy and program pilots: a single jurisdiction or hospital is chosen narrowly so resources concentrate and learning is extracted, with later expansion exploiting demonstrated results and political legitimacy. Invasive-species ecology: a beachhead population establishes in a disturbed margin, builds numbers and local adaptation, and spreads, with propagule-pressure thresholds governing establishment.
- Invasive Species
- The clean model has seven primitives — host system, incumbent community, existing control repertoire, newcomer profile, pathway and introduction rate, growth dynamics in the host, and displacement profile — and supports several derivations. Lag-and-release: newcomers often have an inconspicuous lag phase followed by exponential expansion once a threshold is crossed, so control is far cheaper during lag. Propagule pressure: invasion success rises with the number, frequency, and size of introductions, so controlling the pathway scales the whole risk.
This sourceEstablishes that invasion success rises with the number, frequency, and size of introductions, so controlling the introduction pathway scales overall risk.
- The clean model has seven primitives — host system, incumbent community, existing control repertoire, newcomer profile, pathway and introduction rate, growth dynamics in the host, and displacement profile — and supports several derivations. Lag-and-release: newcomers often have an inconspicuous lag phase followed by exponential expansion once a threshold is crossed, so control is far cheaper during lag. Propagule pressure: invasion success rises with the number, frequency, and size of introductions, so controlling the pathway scales the whole risk.
Mechanisms¶
- Pathway Risk Register
- It makes "how does this keep getting in, and who owns that" answerable, ownable, and prioritized, and it reflects the ecological insight that establishment risk scales with propagule pressure
This sourceIdentifies propagule pressure as a key predictor of whether an introduced population establishes successfully.
- It makes "how does this keep getting in, and who owns that" answerable, ownable, and prioritized, and it reflects the ecological insight that establishment risk scales with propagule pressure
Verification¶
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