Expanding the Propagule Pressure Concept to Understand the Impact of Biological Invasions

Ricciardi, Anthony; Jones, Lisa A.; Kestrup, Åsa M.; Ward, Jessica M.

doi:10.1002/9781444329988.ch17

Cited by 25 publications

(22 citation statements)

References 70 publications

(100 reference statements)

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“…V) Organismal influx 17) Propagule pressure Ricciardi et al (2011a) Impacts are a function of the number, composition and frequency of introduced propagules. 18) Colonization pressure Alpert (2006), Lockwood et al…”

Section: ) Environmental Matchingmentioning

confidence: 99%

“…Although the relationship to establishment success has been demonstrated numerous times across a variety of species, the influence of propagule pressure on impact is still poorly elucidated. One mechanism by which propagule pressure can influence impact is by enhancing post-establishment population growth (Ricciardi et al 2011a). Large numbers of initial colonists could increase the rate of population growth by allowing the incipient population to overcome a suite of factors associated with small population size (e.g., Allee effects, stochastic events), and this rapid growth could have concomitant effects on other members of the community.…”

Section: Propagule Pressurementioning

confidence: 99%

“…Ecological impact is correlated with the invader's abundance or performance (e.g., feeding efficiency), which declines with distance between the ambient condition and a physiological optimum, V o , along an abiotic gradient (environmental matching hypothesis), and co-varies with resident species interactions; the latter resulting in either inhibition (biotic resistance hypothesis) or facilitation of the invader (invasional meltdown hypothesis). released by various transport vectors into an area, there is an increasing probability of introduction of harmful genotypes or individuals capable of hybridizing with natives (reviewed in Ricciardi et al 2011a). In addition, the novel genetic admixtures that are produced under such circumstances can lead to higher impacts if they allow a nonnative species to evolve quickly to local conditions, acquire a key trait to expand its niche, or evolve novel resource use.…”

Section: Propagule Pressurementioning

confidence: 99%

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Progress toward understanding the ecological impacts of nonnative species

Ricciardi

Hoopes

Marchetti

et al. 2013

Ecological Monographs

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588

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A predictive understanding of the ecological impacts of nonnative species has been slow to develop, owing largely to an apparent dearth of clearly defined hypotheses and the lack of a broad theoretical framework. The context dependency of impact has fueled the perception that meaningful generalizations are nonexistent. Here, we identified and reviewed 19 testable hypotheses that explain temporal and spatial variation in impact. Despite poor validation of most hypotheses to date, evidence suggests that each can explain at least some impacts in some situations. Several hypotheses are broad in scope (applying to plants and animals in virtually all contexts) and some of them, intriguingly, link processes of colonization and impact. Collectively, these hypotheses highlight the importance of the functional ecology of the nonnative species and the structure, diversity, and evolutionary experience of the recipient community as general determinants of impact; thus, they could provide the foundation for a theoretical framework for understanding and predicting impact. Further substantive progress toward this goal requires explicit consideration of within‐taxon and across‐taxa variation in the per capita effect of invaders, and analyses of complex interactions between invaders and their biotic and abiotic environments.

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Section: ) Environmental Matchingmentioning

confidence: 99%

Section: Propagule Pressurementioning

confidence: 99%

Section: Propagule Pressurementioning

confidence: 99%

See 1 more Smart Citation

Progress toward understanding the ecological impacts of nonnative species

Ricciardi

Hoopes

Marchetti

et al. 2013

Ecological Monographs

Self Cite

606

588

View full text Add to dashboard Cite

show abstract

“…There is growing evidence that propagule pressure and buffering of large native populations against invasions are universal factors determining the outcome of invasions (Simberloff, 2009;Blackburn et al, 2011;Ricciardi et al, 2011). The widespread occurrence of butterfly species on Mediterranean islands and the relatively large island areas suggest that extinctions are comparatively rare events and that most suitable habitat is continually occupied.…”

Section: Phenetic 'Compression' In Western Mediterraneanmentioning

confidence: 99%

Identifying zones of phenetic compression in West Mediterranean butterflies (Satyrinae): refugia, invasion and hybridization

Dapporto¹,

Bruschini

Dincă

et al. 2012

Diversity and Distributions

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Aim Distinct insular populations are generally considered important units for conservation. In island–mainland situations, unidirectional introgressive gene flow from the most abundant, typically continental, populations into the smaller island populations can erase native insular genetic units. As an indication of threat, the concept of phenetic slope is developed, a measure proportional to differentiation and to geographical proximity. Location The Western Mediterranean, including the following islands: Sardinia, Sicily, Corsica, Balearics, circum‐Italian, circum‐Sicilian and circum‐Sardo‐Corsican archipelagos. Eastern Europe is included for comparison. Methods Geometric morphometrics was applied to 2392 male genitalia of seven butterfly species groups. Geographic Information System techniques were used to depict the pattern in the distribution of morphotypes. The slope of variation in genital shape was computed to highlight geographical areas showing abrupt morphological changes. Correlation analyses were performed between the mean slope values across sea straits separating islands and nearest sources and ecological traits of the species that underlie their colonization and migration capacity. Results Phenetic slope analysis has revealed that the strait of Messina and the northern Tyrrhenian Sea support particularly contrasting populations. In these areas, mean slopes for species also correlated with certain ecological traits of the species. Sardinia emerges as the most stable refugium for ancestral mediterranean populations. Main conclusions There is strong support for the hypothesis that Italy has experienced invasion by populations from Eastern Europe with postglacial expansion of these populations across Italy. However, propagules are impeded from invading islands by the expanse of sea straits. Even so, sea straits are not invariably barriers. Our results suggest that wind direction in combination with habitat occupancy may have maintained ancestral insular populations in key locations distinguished by phenetic compression. We conclude that native insular populations acting as barriers to introgression in the areas showing particularly steep phenetic slopes deserve attention in conservation programmes.

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“…Moreover, release of non-native species can lead to biological invasions (Sherwood 2001, Agoramoorthy and Hsu 2005, Chan 2006, Agoramoorthy and Hsu 2007, Corlett 2010) and eradication of established invasive species is often impossible (Pimentel et al 2005). According to the propagule pressure hypothesis of species invasions, high frequency of introduction events or high number of individuals or species introduced per event not only significantly increase the likelihood that introduced species will become established but can also increase impacts on native species (Cassey et al 2004, Lockwood et al 2009, Ricciardi et al 2011. In keeping with this hypothesis, we recently found that high frequency of Buddhist religious release events increased the likelihood of establishment of feral populations of introduced bullfrogs (Liu et al 2012), confirming that propagule pressure from religious releases can lead to biological invasions.…”

Section: Introductionmentioning

confidence: 99%

Ecological knowledge reduces religious release of invasive species

et al. 2013

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Abstract. Globally, ceremonial wildlife release events, originated from the traditions of Buddhism and other Asian religions take place in large numbers every year, and have caused conservation concerns. These releases pose a paradox in that Buddhism is generally considered to have great respect for the environment and a desire to cause no harm to any living being, yet Buddhist wildlife releases have resulted in biological invasions. We explored this paradox by evaluating the release of two highly invasive species (American bullfrogs Lithobates catesbeianus and red-eared slider turtles Trachemys scripta elegans) by 123 Buddhist temples surveyed across four provinces in China and validating survey results with intensive field surveys of release sites. We found that ecological knowledge of invasive species reduced the probability of release; conversely, market availability increased this probability. We suggest that this invasion paradox stems largely from a lack of invasive species knowledge and thus targeted public education about invasive species could be an effective strategy for preventing religious release of invasive species on a global scale.

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Expanding the Propagule Pressure Concept to Understand the Impact of Biological Invasions

Cited by 25 publications

References 70 publications

Progress toward understanding the ecological impacts of nonnative species

Progress toward understanding the ecological impacts of nonnative species

Identifying zones of phenetic compression in West Mediterranean butterflies (Satyrinae): refugia, invasion and hybridization

Ecological knowledge reduces religious release of invasive species

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