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Auteur David M. Richardson |
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Affiner la rechercheAlien plants in checklists and floras : towards better communication between taxonomists and ecologists / Petr Pysek in Taxon, vol. 53, n°1 (Année 2004)
Titre : Alien plants in checklists and floras : towards better communication between taxonomists and ecologists Type de document : Livre Auteurs : Petr Pysek, Auteur ; David M. Richardson, Auteur ; Marcel Rejmánek, Auteur ; G. L. Webster, Auteur ; M. Williamson, Auteur Année de publication : 2004 Article en page(s) : pp. 131-143 Langues : Anglais Mots-clés : plante invasive invasion biologique plante exotique hybride plante native naturalisation terminologie graine Résumé : "The number of studies dealing with plant invasions is increasing rapidly, but the accumulating body of knowledge has unfortunately also spawned increasing confusion about terminology. Invasions are a global phenomenon andcomparison of geographically distant regions and their introduced biota is a crucially important methodological approach for elucidation of the determinants of invasiveness and invasibility. Comparative studies of alien floras provide substantial new insights to our understanding of general patterns of plant invasions. Such studies, using information in previously published floras and checklists, are fundamentally dependent on the quality of the assessment of particular species with respect to their taxonomic identity, time of immigration and invasion status. Three crucial decisions should be made when defining the status of a plant species in a given region: (1) whether the taxon is native or alien to that region (origin status); (2) what is its position in the invasion process, i.e., when was it introduced (residence status); and (3) what is the degree of its naturalization and possible invasion (invasion status). Standard floras differ hugely in their treatment of non-native species and those with appropriate categorization of alien species according to their status are rather rare. The present paper suggests definitions of terms associated with plant invasions and places these into the context of floras. Recommendations are outlined on how to deal with the issue of plant invasions in standard floras with the aim of contributing to a better understanding between taxonomists and ecologists and allowing more detailed comparative analyses of alien floras of various regions of the world." (source : auteurs) Type de publication : périodique Référence biblio : Pysek P., Richardson D., Rejmánek M., Webster G.-L., Williamson M., 2004 - Alien plants in checklists and floras : towards better communication between taxonomists and ecologists. Taxon, 53 (1) : 131-143. ID PMB : 33297 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=33297
in Taxon > vol. 53, n°1 (Année 2004) . - pp. 131-143[article]Exemplaires
Cote Localisation Disponibilité aucun exemplaire Ecology and Biogeography of Pinus / David M. Richardson (2000)
Titre : Ecology and Biogeography of Pinus Type de document : Livre Auteurs : David M. Richardson, Auteur Editeur : Cambridge University Press Année de publication : 2000 Importance : 527 p. ISBN/ISSN/EAN : 978-0-521-78910-3 Langues : Anglais Catégories : [Espèces (in biblio)] Pinus Mots-clés : écologie biogéographie évolution systématique macroécologie conservation Résumé : "Pines are the most important group of trees in the world, occuring over large parts of the northern hemisphere, often forming the dominant vegetation cover. They play an important role in the ecosystems of which they form a part and provide a valuable source of fibre, timber and various other products. This volume provides a comprehensive review essential for all concerned with the management of natural and planted pine forests." (source : auteur) Note de contenu : Ecology and biogeography of Pinus : an introduction - Phylogeny and systematics of Pinus - Early evolution of pines - The late Quaternary dynamics of pines in northern Asia - The late Quaternary dynamics of pines in Europe - The late Quaternary dynamics of pines in northern North America - The history of pines in Mexico and Central America - Pines of the Mediterranean Basin - The recent history of pinyon pines in the American Southwest - Macroecological limits to the abundance and distribution of Pinus - Fire and pine ecosystems - Evolution of life histories in Pinus - Genetic variation in Pinus - Seed dispersal in Pinus - Ecophysiology of Pinus - The mycorrhizal status of Pinus - Effects of pines on soil properties and processes - Insect-pine interactions - Diseases and the ecology of indigenous and exotic pines - Pines in cultivation : a global view - Pinus radiata : a narrow endemic from North America takes on the world - Pines as invaders in the southern hemisphere Type de publication : livre Référence biblio : Richardson D., 2000 - Ecology and Biogeography of Pinus. Cambridge University Press, 527 p. ID PMB : 67286 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=67286 Exemplaires
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Titre : Successional changes on a former tank range in eastern Germany : Does increase of the native grass species Molinia caerulea cause decline of less competitive Drosera species? Type de document : Livre Auteurs : Mirijam Gaertner, Auteur ; W. Konold, Auteur ; David M. Richardson, Auteur Année de publication : 2010 Article en page(s) : pp. 63-74 Langues : Anglais Catégories : [Espèces (in biblio)] Drosera
[Espèces (in biblio)] Molinia caeruleaMots-clés : compétition pâturage dynamique de la végétation série de végétation Résumé : "Invasion of natural ecosystems by weedy grasses is often associated with increasing levels of disturbance. However, there is substantial evidence that cessation of disturbance can also lead to plant invasions. This paper explores vegetation development on a former military training area in eastern Germany. Many military training areas have a high nature conservation value as they offer large un-fragmented areas and valuable open landscapes. In eastern Germany, 4.4% of the land is covered by military training facilities. Following German reunification in 1990 large tracts of land that had been used for military training purposes were converted to civil use. Cessation of military activity is leading to a decline of open habitats through natural succession. The study investigates whether succession is accompanied by a spread of dominant species, e.g. Purple moor grass (Molinia caerulea L. Moench) and whether this process results in a decline of pioneer species (e.g., Drosera species). As a potential management option we explored grazing by moose (Alces alces L.) and other wild animals. The current state of the vegetation and its development was investigated at landscape and species levels. The influence of animals was documented by determining the type of ground disturbance and the impact on the herbaceous vegetation. The trajectory of succession involves the increase of species with high competitive abilities, particularly Molinia caerulea, and a decline of less competitive Drosera species. The pattern of development of the vegetation suggests that the Drosera species will soon survive in only a few locations. Wild animals exerted a significant influence on the vegetation, with most disturbances being the result of trampling. Tracks left by animals can provide regeneration niches for the Drosera species. However to guarantee the maintenance of large open habitats other management practices such as sod cutting are required." (source : auteurs) Type de publication : périodique Référence biblio : Gaertner M., Konold W., Richardson D., 2010 - Successional changes on a former tank range in eastern Germany : Does increase of the native grass species Molinia caerulea cause decline of less competitive Drosera species? Nature Conservation, 18 (2) : 63-74. Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=66945
in Nature Conservation > vol. 18, n°2 (Mai 2010) . - pp. 63-74[article]Exemplaires
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Titre : Which Taxa Are Alien? Criteria, Applications, and Uncertainties Type de document : Livre Auteurs : Franz Essl, Auteur ; Sven Buerki, Auteur ; Piero Genovesi, Auteur ; Philip E. Hulme, Auteur ; Jonathan M Jeschke, Auteur ; Stelios Katsanevakis, Auteur ; Ingo Kowarik, Auteur ; Ingolf Kühn, Auteur ; Petr Pysek, Auteur ; Wolfgang Rabitsch, Auteur ; Stefan Schindler, Auteur ; Mark van Kleunen, Auteur ; Vilà Montserrat, Auteur ; John R. U. Wilson, Auteur ; David M. Richardson, Auteur Année de publication : 2018 Article en page(s) : pp. 496-509 Langues : Anglais Mots-clés : biogéographie invasion biologique cryptogénique critère de classification Résumé : "Human activities such as the transport of species to new regions and modifications of the environment are increasingly reshaping the distribution of biota. Accordingly, developing robust, repeatable, and consistent definitions of alien species that serve scientific and policy purposes has become of prime importance. We provide a set of classification criteria that are widely applicable across taxa and realms and offer guidance on their use in practice. The criteria focus on (a) acknowledging the role of assessment uncertainty, (b) incorporating time since introduction, (c) considering infraspecific taxonomic ranks, and (d) differentiating between alien species whose survival depends on explicit human assistance from those that survive without such assistance. Furthermore, we make recommendations for reducing assessment uncertainty, suggest thresholds for species assessment, and develop an assessment scheme. We illustrate the application of the assessment criteria with case studies. Finally, the implications for alien species management, policy, and research are discussed." (source : auteurs) Type de publication : périodique Référence biblio : Essl F., Buerki S., Genovesi P., Hulme P., Jeschke J., Katsanevakis S., Kowarik I., Kühn I., Pysek P., Rabitsch W., Schindler S., van Kleunen M., Montserrat V., Wilson J.-U., Richardson D., 2018 - Which Taxa Are Alien? Criteria, Applications, and Uncertainties. Bioscience, 68 (7) : 496-509. ID PMB : 69137 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=69137
in Bioscience > vol. 68, n°7 (Année 2018) . - pp. 496-509[article]Exemplaires
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