Search results for "ARABLE WEED"

showing 6 items of 6 documents

Arable-weed flora and its pollen representation: A case study from the eastern part of France

2007

International audience; Local pollen deposition in human-influenced vegetation types is studied with the aim of establishing the relationship between arable-weed vegetation and its pollen representation as an aid in interpreting human presence and impact on vegetation from pollen assemblages. The study area is located in the Franche-Comté region, eastern part of France. The presence of plants within 100 m2 plots and their pollen representation in moss samples within the same plots was recorded from different crops and annual fallows. Patterns in the vegetation and pollen assemblages were investigated separately using principal coordinate analysis (PCoA). Procrustean co-inertia analysis (PCI…

0106 biological sciences010506 paleontologyPollination[SDV]Life Sciences [q-bio]ScleranthusPOLLEN-VEGETATION RELATIONSHIPSpollen–vegetation relationshipsmedicine.disease_cause010603 evolutionary biology01 natural sciencesPollenBotanymedicineEcology Evolution Behavior and Systematics0105 earth and related environmental sciencesbiologyEcologyPaleontologyVegetation15. Life on landbiology.organism_classificationFallopia[SDE.ES]Environmental Sciences/Environmental and Societymodern pollenanthropogenic indicatorsarable weedsTaxonprocrustean analyses[SDE]Environmental SciencesBiological dispersal[SDE.ES] Environmental Sciences/Environmental and SocietyFranceCentaurea cyanus[ SDE.ES ] Environmental Sciences/Environmental and Society
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Variations spatiales et temporelles des communautés adventices des cultures annuelles en France

2007

Although arable weed species are particularly well adapted to habitats characterised by high levels of disturbance(ploughing, harvest), the degree and rate at which agro-ecosytems have been transformed in the last 50 years in Europe(use of chemicals, changes in crop rotations) has led to profound changes in the composition and diversity of arable weedcommunities. This thesis provides an update on the composition and diversity of weed communities that can be foundacross the main crop types and regions of France. It also addresses two objectives i) applying (community) ecologytheories for the analysis and interpretation of spatial and temporal variations in weed communities and ii) using the …

0106 biological sciences[SDE] Environmental Sciences[SDV]Life Sciences [q-bio]specialistsspecies turnovercommunauté.CommunityPlant Science01 natural sciencesVALEURS INDICATRICES D'ELLENBERGarable weedCOMMUNAUTEplant functional typespecies richnessBIOVIGILANCE FLOREfield margins[SDV.EE]Life Sciences [q-bio]/Ecology environmentabundancediversité fonctionnelleGENERALISTESflora shifts04 agricultural and veterinary sciencesfunctional diversityBORD DE CHAMPGROUPE FONCTIONNEL[SDV] Life Sciences [q-bio][SDV.EE] Life Sciences [q-bio]/Ecology environmentGeographyADVENTICESNICHE ECOLOGIQUEfrequency[SDE]Environmental SciencesSPECIALISTESTURNOVERrichesse spécifiquegeneralistsniche écologiqueCHANGEMENT DE FLORE010603 evolutionary biologyEllenberg indicator valuesABONDANCERICHESSE SPECIFIQUEniche breadthfréquencecropping practices changesFREQUENCECHANGEMENT DE TECHNIQUES CULTURALESDIVERSITE FONCTIONNELLEgénéralistes040103 agronomy & agriculture0401 agriculture forestry and fisheriesspécialistesTRAITS BIOLOGIQUES
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Identification of weed community traits response to conservation agriculture

2013

International audience; Conservation agriculture is designed to deliver more sustainable cropping systems by preserving agricultural soils with tillage abandonment. However, knowledge on the impacts of Conservation agriculture adoption on weed infestation level and potential shifts in the composition of weed communities appears low and contradictory. We used a trait-based approach to investigate whether there are shifts in values of a set of traits within weed communities following the adoption of Direct Drilling with cover-crop (DD) which is one of the Conservation Agriculture practices. Weed surveys were conducted across a range of times since conversion to DD in 52 winter wheat fields lo…

0106 biological sciencesno-tillConservation agriculture[SDV]Life Sciences [q-bio]RLQ01 natural sciences[SHS]Humanities and Social SciencesNo-till farming[SDV.BV]Life Sciences [q-bio]/Vegetal Biologyfunctional traits2. Zero hungerEcology[ SDV ] Life Sciences [q-bio]business.industryAgroforestry04 agricultural and veterinary sciences15. Life on land[SDV] Life Sciences [q-bio]Tillagearable weedsGeographyconservation agricultureAgronomyAgriculture[SDE]Environmental Sciences040103 agronomy & agricultureTrait0401 agriculture forestry and fisheriesAnimal Science and ZoologyOrdinationbusinessWeedAgronomy and Crop ScienceCropping010606 plant biology & botany
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Variations spatiales et temporelles de communautés adventices des cultures annuelles en France

2010

Résumé de thèse; National audience

[SDE] Environmental SciencesELLENBERG INDICATOR VALUESFIELDS MARGINS[SDV]Life Sciences [q-bio]ARABLE WEEDPLANT FUNCTIONAL TYPENICHE BREADTHSPECIALISTSFREQUENCYCHANGEMENT DE FLOREABONDANCEVALEURS INDICATRICES D'ELLENBERGFUNCTIONAL DIVERSITYCOMMUNAUTERICHESSE SPECIFIQUEBIOVIGILANCE FLOREFREQUENCESPECIES RICHNESSGENERALISTESCHANGEMENT DE TECHNIQUES CULTURALESBORD DE CHAMPFLORA SHIFTS[SDV] Life Sciences [q-bio]COMMUNITYGROUPE FONCTIONNELDIVERSITE FONCTIONNELLEFUNCTIONAL TRAITSCROPPING PRACTICES CHANGESNICHE ECOLOGIQUESPECIALISTES[SDE]Environmental SciencesTURNOVERABUNDANCEGENERALISTSTRAITS BIOLOGIQUESSPECIES TURNOVER
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Archéophytes et néophytes.Pour une nouvelle détermination des marqueurs polliniques de l'anthropisation. Le cas des milieux cultivés et rudéraux de F…

2007

297p. de synthèse, annexes p.299-414, 15 articles en soumission Diplôme : Dr. d'Universite

[SDV] Life Sciences [q-bio][SDE] Environmental SciencesARABLE WEED-FLORARUDERAL FLORAARCHAEOPHYTESANTHROPOGENIC POLLEN INDICATORS[SDV]Life Sciences [q-bio]MULTIVARIATE ANALYSIS[SDE]Environmental SciencesPALYNOLOGYPOLLEN/VEGETATION RELATIONSHIPNEOPHYTES
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Arable weeds in agricultural landscapes: new paradigms and emerging challenges

2008

National audience

[SDV] Life Sciences [q-bio][SDE] Environmental Sciencesagricultural landscapesarable weeds[SDV]Life Sciences [q-bio][SDE]Environmental Sciencesemerging challenges[SDV.BV]Life Sciences [q-bio]/Vegetal Biology[SDV.BV] Life Sciences [q-bio]/Vegetal BiologyComputingMilieux_MISCELLANEOUS
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