Modeling the relationship between propagule pressure and invasion risk to inform policy and management

2013 ◽  
Vol 23 (7) ◽  
pp. 1691-1706 ◽  
Author(s):  
Marjorie J. Wonham ◽  
James E. Byers ◽  
Edwin D. Grosholz ◽  
Brian Leung
Keyword(s):  
Propagule Pressure ◽  
Invasion Risk ◽  
The Relationship

The relationship of propagule pressure to invasion potential in plants

Euphytica ◽  
2006 ◽  
Vol 148 (1-2) ◽  
pp. 87-96 ◽  
Author(s):  
M. Alejandra Martínez-Ghersa ◽  
Claudio M. Ghersa
Keyword(s):  
Propagule Pressure ◽  
Invasion Potential ◽  
Relationship Of ◽  
The Relationship

scholarly journals Temporal modelling of ballast water discharge and ship-mediated invasion risk to Australia

2015 ◽  
Vol 2 (4) ◽  
pp. 150039 ◽  
Author(s):  
Robert C. Cope ◽  
Thomas A. A. Prowse ◽  
Joshua V. Ross ◽  
Talia A. Wittmann ◽  
Phillip Cassey
Keyword(s):  
Biological Invasions ◽  
Ballast Water ◽  
Propagule Pressure ◽  
Water Discharge ◽  
Economic Damage ◽  
Maritime Trade ◽  
Bulk Carrier ◽  
Invasion Risk ◽  
Marine Invasion ◽  
Temporal Modelling

Biological invasions have the potential to cause extensive ecological and economic damage. Maritime trade facilitates biological invasions by transferring species in ballast water, and on ships' hulls. With volumes of maritime trade increasing globally, efforts to prevent these biological invasions are of significant importance. Both the International Maritime Organization and the Australian government have developed policy seeking to reduce the risk of these invasions. In this study, we constructed models for the transfer of ballast water into Australian waters, based on historic ballast survey data. We used these models to hindcast ballast water discharge over all vessels that arrived in Australian waters between 1999 and 2012. We used models for propagule survival to compare the risk of ballast-mediated propagule transport between ecoregions. We found that total annual ballast discharge volume into Australia more than doubled over the study period, with the vast majority of ballast water discharge and propagule pressure associated with bulk carrier traffic. As such, the ecoregions suffering the greatest risk are those associated with the export of mining commodities. As global marine trade continues to increase, effective monitoring and biosecurity policy will remain necessary to combat the risk of future marine invasion events.

scholarly journals Assessing the relative potential ecological impacts and invasion risks of emerging and future invasive alien species

NeoBiota ◽  
2018 ◽  
Vol 40 ◽  
pp. 1-24 ◽  
Author(s):  
James W.E. Dickey ◽  
Ross N. Cuthbert ◽  
Michael Rea ◽  
Ciaran Laverty ◽  
Kate Crane ◽  
...  
Keyword(s):  
Alien Species ◽  
Attack Rate ◽  
Feeding Rate ◽  
Invasive Alien Species ◽  
Propagule Pressure ◽  
Ecological Impacts ◽  
Economic Damage ◽  
Functional Responses ◽  
Invasion Risk ◽  
Pet Trade

Invasive alien species (IAS) cause myriad negative impacts, such as ecosystem disruption, human, animal and plant health issues, economic damage and species extinctions. There are many sources of emerging and future IAS, such as the poorly regulated international pet trade. However, we lack methodologies to predict the likely ecological impacts and invasion risks of such IAS which have little or no informative invasion history. This study develops the Relative Impact Potential (RIP) metric, a new measure of ecological impact that incorporates per capita functional responses (FRs) and proxies for numerical responses (NRs) associated with emerging invaders. Further, as propagule pressure is a determinant of invasion risk, we combine the new measure of Pet Propagule Pressure (PPP) with RIP to arrive at a second novel metric, Relative Invasion Risk (RIR). We present methods to calculate these metrics and to display the outputs on intuitive bi- and triplots. We apply RIP/RIR to assess the potential ecological impacts and invasion risks of four commonly traded pet turtles that represent emerging IAS: Trachemysscriptascripta, the yellow-bellied slider; T.s.troostii, the Cumberland slider; Sternotherusodoratus, the common musk turtle; and Kinosternonsubrubrum, the Eastern mud turtle. The high maximum feeding rate and high attack rate of T.s.scripta, combined with its numerical response proxies of lifespan and fecundity, gave it the highest impact potential. It was also the second most readily available according to our UK surveys, indicating a high invasion risk. Despite having the lowest maximum feeding rate and attack rate, S.odoratus has a high invasion risk due to high availability and we highlight this species as requiring monitoring. The RIP/RIR metrics offer two universally applicable methods to assess potential impacts and risks associated with emerging and future invaders in the pet trade and other sources of future IAS. These metrics highlight T.s.scripta as having high impact and invasion risk, corroborating its position on the EU list of 49 IAS of Union Concern. This suggests our methodology and metrics have great potential to direct future IAS policy decisions and management. This, however, relies on collation and generation of new data on alien species functional responses, numerical responses and their proxies, and imaginative measures of propagule pressure.

scholarly journals Relationship between propagule pressure and colonization pressure in invasion ecology: a test with ships' ballast

2012 ◽  
Vol 279 (1740) ◽  
pp. 2990-2997 ◽  
Author(s):  
Elizabeta Briski ◽  
Sarah A. Bailey ◽  
Oscar Casas-Monroy ◽  
Claudio DiBacco ◽  
Irena Kaczmarska ◽  
...  
Keyword(s):  
Scientific Literature ◽  
Propagule Pressure ◽  
Strong Relationship ◽  
Colonization Pressure ◽  
Selective Pressures ◽  
Number Of Species ◽  
Water And Sediment ◽  
Taxonomic Groups ◽  
The Relationship ◽  
New Habitats

Increasing empirical evidence indicates the number of released individuals (i.e. propagule pressure) and number of released species (i.e. colonization pressure) are key determinants of the number of species that successfully invade new habitats. In view of these relationships, and the possibility that ships transport whole communities of organisms, we collected 333 ballast water and sediment samples to investigate the relationship between propagule and colonization pressure for a variety of diverse taxonomic groups (diatoms, dinoflagellates and invertebrates). We also reviewed the scientific literature to compare the number of species transported by ships to those reported in nature. Here, we show that even though ships transport nearly entire local communities, a strong relationship between propagule and colonization pressure exists only for dinoflagellates. Our study provides evidence that colonization pressure of invertebrates and diatoms may fluctuate widely irrespective of propagule pressure. We suggest that the lack of correspondence is explained by reduced uptake of invertebrates into the transport vector and the sensitivity of invertebrates and diatoms to selective pressures during transportation. Selection during transportation is initially evident through decreases in propagule pressure, followed by decreased colonization pressure in the most sensitive taxa.

scholarly journals Ballast water transport of non-indigenous zooplankton to Canadian ports

2011 ◽  
Vol 69 (3) ◽  
pp. 483-491 ◽  
Author(s):  
Claudio DiBacco ◽  
Donald B. Humphrey ◽  
Leslie E. Nasmith ◽  
Colin D. Levings
Keyword(s):  
Water Transport ◽  
Community Composition ◽  
Ballast Water ◽  
Propagule Pressure ◽  
Taxon Richness ◽  
Marine Science ◽  
Invasion Risk ◽  
Dispersal Barriers ◽  
Natural Dispersal

Abstract DiBacco, C., Humphrey, D. B., Nasmith, L. E., and Levings, C. D. 2012. Ballast water transport of non-indigenous zooplankton to Canadian ports. – ICES Journal of Marine Science, 69: 483–491. Ballast water is one of the primary transport vectors for the transfer and introduction of non-indigenous zooplankton (NIZ). Regulations require vessels from overseas to conduct mid-ocean exchange before discharging ballast in Canadian ports. Intracoastal vessels from nearby ports may be exempt from exchange, whereas intracoastal vessels from more distant ports are required to exchange. Zooplankton in the ballast water of transoceanic exchanged (TOE), intracoastal exchanged (ICE), and intracoastal unexchanged (ICU) vessels arriving at Canada's west (WC) and east (EC) coasts were examined. NIZ density, propagule pressure, taxon richness, and community composition were compared among the three shipping classes. The WC ports received greater densities of NIZ and had greater NIZ propagule pressure than EC ports. Within WC vessels, NIZ propagule pressure and density were significantly greater in ICU vessels. TOE vessels on the EC had the greatest NIZ propagule pressure and density. ICU vessels entering Vancouver ports represented the greatest invasion risk to Canadian waters. These vessels likely mediate secondary invasions by facilitating the transport of unexchanged ballast directly from ports previously invaded, whereas short ICU voyage duration enhances organism survivorship and vessels transport NIZ over natural dispersal barriers.

scholarly journals Assessing the relative potential ecological impacts and invasion risks of emerging and future invasive alien species

NeoBiota ◽  
2018 ◽  
Vol 39 ◽  
pp. 103-126
Author(s):  
James W.E. Dickey ◽  
Ross N. Cuthbert ◽  
Michael Rea ◽  
Ciaran Laverty ◽  
Kate Crane ◽  
...  
Keyword(s):  
Alien Species ◽  
Attack Rate ◽  
Feeding Rate ◽  
Invasive Alien Species ◽  
Propagule Pressure ◽  
Ecological Impacts ◽  
Economic Damage ◽  
Functional Responses ◽  
Invasion Risk ◽  
Pet Trade

Invasive alien species (IAS) cause myriad negative impacts, such as ecosystem disruption, human, animal and plant health issues, economic damage and species extinctions. There are many sources of emerging and future IAS, such as the poorly regulated international pet trade. However, we lack methodologies to predict the likely ecological impacts and invasion risks of such IAS which have little or no informative invasion history. This study develops the Relative Impact Potential (RIP) metric, a new measure of ecological impact that incorporates per capita functional responses (FRs) and proxies for numerical responses (NRs) associated with emerging invaders. Further, as propagule pressure is a determinant of invasion risk, we combine the new measure of Pet Propagule Pressure (PPP) with RIP to arrive at a second novel metric, Relative Invasion Risk (RIR). We present methods to calculate these metrics and to display the outputs on intuitive bi- and triplots. We apply RIP/RIR to assess the potential ecological impacts and invasion risks of four commonly traded pet turtles that represent emerging IAS: Trachemysscriptascripta, the yellow-bellied slider; T.s.troostii, the Cumberland slider; Sternotherusodoratus, the common musk turtle; and Kinosternonsubrubrum, the Eastern mud turtle. The high maximum feeding rate and high attack rate of T.s.scripta, combined with its numerical response proxies of lifespan and fecundity, gave it the highest impact potential. It was also the second most readily available according to our UK surveys, indicating a high invasion risk. Despite having the lowest maximum feeding rate and attack rate, S.odoratus has a high invasion risk due to high availability and we highlight this species as requiring monitoring. The RIP/RIR metrics offer two universally applicable methods to assess potential impacts and risks associated with emerging and future invaders in the pet trade and other sources of future IAS. These metrics highlight T.s.scripta as having high impact and invasion risk, corroborating its position on the EU list of 49 IAS of Union Concern. This suggests our methodology and metrics have great potential to direct future IAS policy decisions and management. This, however, relies on collation and generation of new data on alien species functional responses, numerical responses and their proxies, and imaginative measures of propagule pressure.

scholarly journals The relationship between propagule pressure and establishment success in alien bird populations: a re-analysis of Moulton & Cropper (2019)

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e8766
Author(s):  
Tim M. Blackburn ◽  
Phillip Cassey ◽  
Julie L. Lockwood ◽  
Richard P. Duncan
Keyword(s):  
Population Biology ◽  
Propagule Pressure ◽  
Recent Analysis ◽  
Bird Population ◽  
Establishment Success ◽  
Bird Populations ◽  
Founding Population ◽  
Strong Positive Relationship ◽  
Native Populations ◽  
The Relationship

A recent analysis by Moulton & Cropper (2019) of a global dataset on alien bird population introductions claims to find no evidence that establishment success is a function of the size of the founding population. Here, we re-analyse Moulton & Cropper’s data and show that this conclusion is based on flawed statistical methods—their data in fact confirm a strong positive relationship between founding population size and establishment success. We also refute several non-statistical arguments against the likelihood of such an effect presented by Moulton & Cropper. We conclude that a core tenet of population biology—that small populations are more prone to extinction—applies to alien populations beyond their native geographic range limits as much as to native populations within them.

scholarly journals The risk of establishment of aquatic invasive species: joining invasibility and propagule pressure

2007 ◽  
Vol 274 (1625) ◽  
pp. 2603-2609 ◽  
Author(s):  
Brian Leung ◽  
Nicholas E Mandrak
Keyword(s):  
Invasive Species ◽  
Zebra Mussel ◽  
Dreissena Polymorpha ◽  
Propagule Pressure ◽  
Joint Model ◽  
Aquatic Invasive Species ◽  
Invasion Risk ◽  
Invasion Pattern ◽  
Policy Priority

Invasive species are increasingly becoming a policy priority. This has spurred researchers and managers to try to estimate the risk of invasion. Conceptually, invasions are dependent both on the receiving environment (invasibility) and on the ability to reach these new areas (propagule pressure). However, analyses of risk typically examine only one or the other. Here, we develop and apply a joint model of invasion risk that simultaneously incorporates invasibility and propagule pressure. We present arguments that the behaviour of these two elements of risk differs substantially—propagule pressure is a function of time, whereas invasibility is not—and therefore have different management implications. Further, we use the well-studied zebra mussel ( Dreissena polymorpha ) to contrast predictions made using the joint model to those made by separate invasibility and propagule pressure models. We show that predictions of invasion progress as well as of the long-term invasion pattern are strongly affected by using a joint model.

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