Stochastic modelling of feral plant populations with seed immigration and road verge management

Garnier, Aurélie; Deville, Alexandra; Lecomte, Jane

doi:10.1016/j.ecolmodel.2006.03.031

Cited by 51 publications

(30 citation statements)

References 40 publications

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“…Outside agricultural fields (e.g. field margins, road verges) wild/weedy relatives may be more or less successfully controlled depending on the type of management used and its timing of application (Garnier et al 2006).…”

Section: Diplotaxis Muralis and Diplotaxis Tenuifoliamentioning

confidence: 99%

Quantifying the introgressive hybridisation propensity between transgenic oilseed rape and its wild/weedy relatives

Devos

Schrijver

Reheul

2008

Environ Monit Assess

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In order to estimate the introgressive hybridisation propensity (IHP) between genetically modified (GM) oilseed rape (Brassica napus) and certain of its cross-compatible wild/weedy relatives at the landscape level, a conceptual approach was developed. A gene flow index was established enclosing the successive steps to successfully achieve introgressive hybridisation: wild/weedy relatives and oilseed rape should co-occur, have overlapping flowering periods, be compatible, produce viable and fertile progeny, and the transgenes should persist in natural/weedy populations. Each step was described and scored, resulting in an IHP value for each cross-compatible oilseed rape wild/weedy relative. The gene flow index revealed that Brassica rapa has the highest introgressive hybridisation propensity (IHP value = 11.5), followed by Hirschfeldia incana and Raphanus raphanistrum (IHP = 6.7), Brassica juncea (IHP = 5.1), Diplotaxis tenuifolia and Sinapis arvensis (IHP = 4.5) in Flanders. Based on the IHP values, monitoring priorities can be defined within the pool of cross-compatible wild/weedy oilseed rape relatives. Moreover, the developed approach enables to select areas where case-specific monitoring of GM oilseed rape could be done in order to detect potential adverse effects on cross-compatible wild/weedy relatives resulting from vertical gene flow. The implementation of the proposed oilseed rape-wild relative gene flow index revealed that the survey design of existing botanical survey networks does not suit general surveillance needs of GM crops in Belgium. The encountered hurdles to implement the gene flow index and proposals to acquire the missing data are discussed.

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Section: Diplotaxis Muralis and Diplotaxis Tenuifoliamentioning

confidence: 99%

Quantifying the introgressive hybridisation propensity between transgenic oilseed rape and its wild/weedy relatives

Devos

Schrijver

Reheul

2008

Environ Monit Assess

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“…In the Czech republic Pergl et al (2012) found that only half of the grid cells assumed to be occupied by the invasive species Heracleum mantegazzianum on the basis of cumulative presence data were actually occupied when resurveyed. Third, identifying populations of feral crops as persistent or not is important to assessing their potential role as gene reservoirs and the extent to which they might enhance gene flow across the landscape (Garnier et al, 2006;Bagavathiannan et al, 2010). Monitoring of feral crop populations is required to effectively confine novel traits (Bagavathiannan and Van Acker, 2008), and this necessitates differentiating feral populations which persist from those that are transient.…”

Section: Implications Of Low Population Survivalmentioning

confidence: 99%

“…The population dynamics of feral crop populations are not well understood (Garnier et al, 2006;Pivard et al, 2008a;Bagavathiannan et al, 2010), and in particular little is known about the factors that determine persistence (Pessel et al, 2001). Persistent populations of feral crops can act as reservoirs for genes and bridges for gene flow (Ellstrand et al, 1999;Bagavathiannan and Van Acker, 2008), hindering efforts to contain the traits of both genetically modified (GM) and conventional crops (Bagavathiannan and Van Acker, 2008;Bagavathiannan et al, 2012).…”

Section: Introductionmentioning

confidence: 98%

“…Agricultural regions are among the most invaded habitats (Jauni and Hyvönen, 2010) and feral populations of many crops are widespread in these regions (Gressel, 2005;Garnier et al, 2006). The population dynamics of feral crop populations are not well understood (Garnier et al, 2006;Pivard et al, 2008a;Bagavathiannan et al, 2010), and in particular little is known about the factors that determine persistence (Pessel et al, 2001).…”

Section: Introductionmentioning

confidence: 98%

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Landscape-level persistence and distribution of alien feral crops linked to seed transport

Meffin¹,

Duncan

Hulme³

2015

Agriculture, Ecosystems & Environment

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“…Deployment of life-history modeling approaches has proved a popular and informative strategy to address this need, and has generally confirmed a tendency towards extinction and emphasized the importance of seedbank dynamics and fresh spillage (Aono et al, 2006;Garnier et al, 2006;Pivard et al, 2008aPivard et al, , 2008bSaji et al, 2005;Kowarik, 2007a, 2007b;Yoshimura et al, 2006). These data are useful because they provide a valuable baseline comparator for any transgenic crop.…”

Section: Effects Of Enhanced Fitnessmentioning

confidence: 99%

Fitness and beyond: Preparing for the arrival of GM crops with ecologically important novel characters

Wilkinson

Tepfer

2009

Environ. Biosafety Res.

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The seemingly inexorable expansion of global human population size, significant increases in the use of biofuel crops and the growing pressures of multifunctional land-use have intensified the need to improve crop productivity. The widespread cultivation of high-yielding genetically modified (GM) crops could help to address these problems, although in doing so, steps must also be taken to ensure that any gene flow from these crops to wild or weedy recipients does not cause significant ecological harm. It is partly for this reason that new GM cultivars are invariably subjected to strict regulatory evaluation in order to assess the risks that each may pose to the environment. Regulatory bodies vary in their approach to decision-making, although all require access to large quantities of detailed information. Such an exhaustive case-by-case approach has been made tractable by the comparative simplicity of the portfolio of GM crops currently on the market, with four crops and two classes of traits accounting for almost all of the area under cultivation of GM crops. This simplified situation will change shortly, and will seriously complicate and potentially slow the evaluation process. Nowhere will the increased diversity of GM crops cause more difficulty to regulators than in those cases where there is a need to assess whether the transgene(s) will enhance fitness in a non-transgenic relative and thereafter cause ecological harm. Current practice to test this risk hypothesis focuses on attempting to detect increased fitness in the recipient. In this paper we explore the merits and shortcomings of this strategy, and investigate the scope for developing new approaches to streamline decision-making processes for transgenes that could cause unwanted ecological change.Keywords: environmental risk assessment / fitness / fitness parameters / GM crops / invasiveness / weediness THE CONTEXT OF ENVIRONMENTAL RISK ASSESSMENTThroughout the world, wherever transgenic crops are grown outside the confines of the laboratory, there is a regulatory system for governing and monitoring the conditions under which experimental field trials and/or commercial cultivation is sanctioned. There is considerable variation between individual countries in the legislative frameworks that dictate how decisions to permit, delay or halt the release of a particular transgenic event are made (Capalbo et al., 2003;Cardwell and Kerr, 2008;Guehlstorf and Hallstrom, 2005; Jepson et al., 2005;Kalaitzandonakes et al., 2007;Nasiruddin and Nasim, 2007;Ramjoue, 2007;Salleh, 2006;Zafar, 2007). Nevertheless, there appears to be a growing harmonization of the underlying process that governs decision-making, * Corresponding author: jjw@aber.ac.uk with all systems adopting a case-by-case approach in which large bodies of evidence are first presented and then evaluated in a reiterative fashion.The documents made in support of individual submissions are usually rather weighty and data-rich; they invariably include substantial information relating to the biology and agr...

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Stochastic modelling of feral plant populations with seed immigration and road verge management

Cited by 51 publications

References 40 publications

Quantifying the introgressive hybridisation propensity between transgenic oilseed rape and its wild/weedy relatives

Quantifying the introgressive hybridisation propensity between transgenic oilseed rape and its wild/weedy relatives

Landscape-level persistence and distribution of alien feral crops linked to seed transport

Fitness and beyond: Preparing for the arrival of GM crops with ecologically important novel characters

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