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Artykuły w czasopismach na temat "Végétation concurrente"
SCOTT (John K.) i EVANS (Katherine J.). "La Lutte biologique contre la végétation concurrente en forêt : cas particulier de Rubus fruticosus en Australie." Revue Forestière Française, nr 6 (2002): 585. http://dx.doi.org/10.4267/2042/4946.
Pełny tekst źródłaTellier, Renée, Luc C. Duchesne, Robert S. McAlpine i Jean-Claude Ruel. "Effets du brûlage dirigé et du scarifiage sur l'établissement des semis et sur leur interaction avec la végétation concurrente". Forestry Chronicle 71, nr 5 (1.10.1995): 621–26. http://dx.doi.org/10.5558/tfc71621-5.
Pełny tekst źródłaDietz, Lucie, Lisa Laurent, Eric Lacombe, Jean-Claude Gégout, Jean-Luc Dupouey i Catherine Collet. "Dynamique spontanée de régénération des peuplements du Nord-Est de la France au cours des 20 ans suivant la tempête de 1999". Revue forestière française 74, nr 4 (11.12.2023): 481–94. http://dx.doi.org/10.20870/revforfr.2023.7899.
Pełny tekst źródłaTassin, Jacques. "André Aubréville (1897-1982), a pioneering forester and a visionary mind". BOIS & FORETS DES TROPIQUES 323, nr 323 (7.01.2015): 7. http://dx.doi.org/10.19182/bft2015.323.a31240.
Pełny tekst źródłaCostes, E., S. Jaffuel, A. Audubert, M. Jay, J. Lichou i M. N. Demene. "Chronologie du développement du fruit en relation avec la croissance végétative chez l'abricotier Prunus armeniaca L. cv. Rouge du Roussillon". Canadian Journal of Botany 73, nr 10 (1.10.1995): 1548–56. http://dx.doi.org/10.1139/b95-168.
Pełny tekst źródłaWeaver, Peter L. "Changements à long terme de structure et de composition d'une forêt primaire humide de basse montagne suite au passage d'ouragans a Puerto Rico". BOIS & FORETS DES TROPIQUES 317, nr 317 (1.09.2013): 7. http://dx.doi.org/10.19182/bft2013.317.a20525.
Pełny tekst źródłaStöckli i Sword. "Zolmitriptan als Lingualtablette in der Migräne-Anfallsbehandlung – die ZORO Studie". Praxis 92, nr 9 (1.02.2003): 379–89. http://dx.doi.org/10.1024/0369-8394.92.9.379.
Pełny tekst źródłaRozprawy doktorskie na temat "Végétation concurrente"
Dumas, Noé. "La végétation concurrente de la régénération forestière : évaluation des surfaces colonisées, modélisation de l'abondance et de l'impact sur la régénération ligneuse à l'échelle de la France". Electronic Thesis or Diss., Paris, AgroParisTech, 2022. http://www.theses.fr/2022AGPT0015.
Pełny tekst źródłaForest renewal is a key stage in the life of forest stands as it allows the long-term maintenance of the forest and its associated ecosystem services. Among the factors likely to have a negative impact on forest renewal, colonisation by competitive species can slow down tree regeneration, or even block it for several decades.The objective of this thesis is to estimate the impact of competitive vegetation on tree regeneration on a regional to national scale. The thesis is mainly based on the use of French National Forest Inventory (NFI) data.A first step, using the results of a survey of forest managers, was to establish a list of the main competing species for tree regeneration, and to determine the areas where each species is present with a high abundance. Bramble (Rubus fruticosus), Eagle Fern (Pteridium aquilinum) and Purple Moor-grass (Molinia caerulea) are the main competitive species in France, and are each present with a high abundance in more than 300,000 ha of forests with open canopies in France.In order to better understand the ecology of competitive species, the role of canopy openness on the probability of presence and high abundance of competitive species was studied. For a majority of species, canopy cover has a weak effect on the probability of presence of species. Conversely, species abundance was strongly correlated with canopy cover, with high canopy cover being associated with lower abundance for most competitive species.The effect of competitive vegetation on tree regeneration cover was then modelled at the scale of France for the three main species. High abundance of P. aquilinum and M. caerulea is associated with a relative decrease in tree regeneration cover of about 30% and 40% respectively, compared to situations where these species are present at low abundance. Conversely, R. fruticosus has a more ambivalent effect on tree regeneration. Woody regeneration cover increases slightly on average at intermediate R. fruticosus abundances, and decreases significantly at high abundance of this species.Finally, the probability of presence and high abundance of the three main competing species was modelled, in order to identify the conditions of high abundance and to predict the location of the areas potentially impacted by the appearance of these three species when the canopy is opened. The difficulty of accurately modelling the presence and, more importantly, the level of abundance of these species led to models with poor predictive abilities, which did not allow for robust estimates of the conditions at high risk of colonisation by the three species studied.In conclusion, this thesis has shown that tree regeneration problems related to competitive vegetation species are present on significant areas in French forests. P. aquilinum and M. caerulea have a marked negative effect on tree regeneration regardless of their abundance, whereas the effect of R. fruticosus is only negative at high abundances. Finally, this thesis also demonstrated the importance of modelling presence and abundance separately, and identified the main factors that need to be taken into account to better model species abundance