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Neve P, Barney JN, Buckley Y, Cousens RD, Graham S, Jordan NR, Lawton‐Rauh A, Liebman M, Mesgaran MB, Schut M, Shaw J, Storkey J, Baraibar B, Baucom RS, Chalak M, Childs DZ, Christensen S, Eizenberg H, Fernández‐Quintanilla C, French K, Harsch M, Heijting S, Harrison L, Loddo D, Macel M, Maczey N, Merotto A, Mortensen D, Necajeva J, Peltzer DA, Recasens J, Renton M, Riemens M, Sønderskov M, Williams M, Rew L. Reviewing research priorities in weed ecology, evolution and management: a horizon scan. Weed Res 2018; 58:250-258. [PMID: 30069065 PMCID: PMC6055875 DOI: 10.1111/wre.12304] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2017] [Accepted: 02/05/2018] [Indexed: 05/12/2023]
Abstract
Weedy plants pose a major threat to food security, biodiversity, ecosystem services and consequently to human health and wellbeing. However, many currently used weed management approaches are increasingly unsustainable. To address this knowledge and practice gap, in June 2014, 35 weed and invasion ecologists, weed scientists, evolutionary biologists and social scientists convened a workshop to explore current and future perspectives and approaches in weed ecology and management. A horizon scanning exercise ranked a list of 124 pre-submitted questions to identify a priority list of 30 questions. These questions are discussed under seven themed headings that represent areas for renewed and emerging focus for the disciplines of weed research and practice. The themed areas considered the need for transdisciplinarity, increased adoption of integrated weed management and agroecological approaches, better understanding of weed evolution, climate change, weed invasiveness and finally, disciplinary challenges for weed science. Almost all the challenges identified rested on the need for continued efforts to diversify and integrate agroecological, socio-economic and technological approaches in weed management. These challenges are not newly conceived, though their continued prominence as research priorities highlights an ongoing intransigence that must be addressed through a more system-oriented and transdisciplinary research agenda that seeks an embedded integration of public and private research approaches. This horizon scanning exercise thus set out the building blocks needed for future weed management research and practice; however, the challenge ahead is to identify effective ways in which sufficient research and implementation efforts can be directed towards these needs.
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Affiliation(s)
- P Neve
- Rothamsted ResearchBiointeractions & Crop Protection DepartmentHarpendenHertfordshireUK
| | - J N Barney
- Department of Plant Pathology, Physiology and Weed ScienceVirginia TechBlacksburgVAUSA
| | - Y Buckley
- School of Natural Sciences, ZoologyTrinity College DublinDublinIreland
| | - R D Cousens
- Department of Plant SciencesUniversity of CaliforniaDavisCAUSA
| | - S Graham
- School of Social SciencesThe University of New South WalesSydneyNSWAustralia
| | - N R Jordan
- Agronomy & Plant Genetics DepartmentUniversity of MinnesotaSt. PaulMNUSA
| | - A Lawton‐Rauh
- Department of Genetics and BiochemistryClemson UniversityClemsonSCUSA
| | | | - M B Mesgaran
- Department of Plant SciencesUniversity of CaliforniaDavisCAUSA
| | - M Schut
- Knowledge, Technology and Innovation GroupWageningen UniversityWageningenthe Netherlands
- International Institute of Tropical Agriculture (IITA)KigaliRwanda
| | - J Shaw
- School of Biological SciencesThe University of QueenslandBrisbaneQldAustralia
| | - J Storkey
- Rothamsted ResearchBiointeractions & Crop Protection DepartmentHarpendenHertfordshireUK
| | - B Baraibar
- Plant Sciences DepartmentPenn State UniversityUniversity ParkPAUSA
| | - R S Baucom
- Department of Ecology and Evolutionary BiologyUniversity of MichiganAnn ArborMIUSA
| | - M Chalak
- School of Agricultural and Resource EconomicsCentre for Environmental Economics & PolicyUniversity of Western AustraliaCrawleyWAAustralia
| | - D Z Childs
- Department of Animal and Plant SciencesUniversity of SheffieldSheffieldUK
| | - S Christensen
- Department of Plant and Environmental SciencesUniversity of CopenhagenFrederiksbergDenmark
| | - H Eizenberg
- Department of Plant Pathology and Weed ResearchNewe Ya'ar Research CenterAgricultural Research Organization (ARO)Ramat YishayIsrael
| | | | - K French
- School of Biological SciencesUniversity of WollongongWollongongNSWAustralia
| | - M Harsch
- Department of BiologyUniversity of WashingtonSeattleWAUSA
| | - S Heijting
- Wageningen University and ResearchLelystadthe Netherlands
| | - L Harrison
- Environment DepartmentUniversity of YorkYorkUK
| | - D Loddo
- Institute of Agro‐environmental and forest BiologyNational Research Council (IBAF‐CNR)LegnaroItaly
| | - M Macel
- Molecular Interaction EcologyRadboud University NijmegenNijmegenthe Netherlands
| | | | - A Merotto
- Graduate Group in Plant ScienceSchool of AgricultureFederal University of Rio Grande do Sul (UFRGS)Porto AlegreBrazil
| | - D Mortensen
- Department of Ecology and Evolutionary BiologyUniversity of MichiganAnn ArborMIUSA
| | - J Necajeva
- Department of Plant PhysiologyFaculty of BiologyUniversity of LatviaRigaLatvia
| | - D A Peltzer
- Ecosystem Processes and Global ChangeLandcare ResearchLincolnNew Zealand
| | - J Recasens
- Horticulture, Botany and Landscaping DepartmentAgrotecnio, ETSEAUniversitat de LleidaLleidaSpain
| | - M Renton
- Schools of Biological Sciences & Agriculture and EnvironmentAustralian Herbicide Resistance Initiative and Institute of AgricultureThe University of Western AustraliaCrawleyWAAustralia
| | - M Riemens
- Environment DepartmentUniversity of YorkYorkUK
| | - M Sønderskov
- Department of AgroecologyAarhus UniversityFlakkebjergDenmark
| | - M Williams
- Michael Williams & Associates Pty LtdNatural resource Management Facilitators and StrategistsSydneyNSWAustralia
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Abstract
Extensionality is explored form different points of view. Extensional fuzzy subsets from a fuzzy equivalence relation E are considered as observable subsets with respect to the granularity generated by E. Interestingly, they are characterized as the fuzzy subsets that can be obtained as combinations of the fuzzy equivalence classes of E. Extensional mappings are characterized topologically and the set of extensional mappings between two universes are algebraically determined. Specifying the results to fuzzy mappings from a universe X onto [0, 1] an interpretation of type-2 fuzzy subsets of X as fuzzification of its type-1 fuzzy subsets is provided.
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Affiliation(s)
- D. Boixader
- Sec Matemàtiques i Informàtica, ETSAV, UPC, C. Pere Serra 1-15, Sant Cugat del Vallès, 08190, Spain
| | - J. Recasens
- Sec Matemàtiques i Informàtica, ETSAV, UPC, C. Pere Serra 1-15, Sant Cugat del Vallès, 08190, Spain
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Recasens J, Lawry J. Normalizing Possibility Distributions Using t-Norms. INT J UNCERTAIN FUZZ 2003. [DOI: 10.1142/s0218488503002119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
A new approach to normalizing fuzzy sets is introduced where it is assumed that the normalization method is compatible with a given t-norm. In this context it is proved that the most usual ways to normalize fuzzy subsets correspond to the most common t-norms. For a given fuzzy subset μ, the corresponding normalized fuzzy subset [Formula: see text] can be viewed as the distribution of μ conditioned on the (degree of) existence of its elements with maximal membership. From this view point we investigate the less specific normal fuzzy subset of X among the most similar fuzzy subsets to μ and the normal fuzzy subset generating the same fuzzy T-preorder as μ.
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Affiliation(s)
- J. Recasens
- Secció Matemàtiques i Informàtica – ETSAV, Univ. Politècnica de Catalunya, Pere Serra 1-15, Sant Cugat del Vallès, Barcelona, Spain
| | - J. Lawry
- Department of Engineering Mathematics, University of Bristol, Queens Building, University Walk, Bristol, BS8 1TR, UK
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Hernández E, Recasens J. Generating indistinguishability operators from prototypes. INT J INTELL SYST 2002. [DOI: 10.1002/int.10064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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