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Auteur David M. Richardson |
Documents disponibles écrits par cet auteur (6)
trié(s) par (Pertinence décroissant(e), Titre croissant(e)) Affiner la rechercheNaturalised Hakea. What species are we actually talking about in Europe ? / Johan Van Valkenburg in Botany letters, vol. 171, n°3 (Année 2024)
Titre : Naturalised Hakea. What species are we actually talking about in Europe ? Auteurs : Johan Van Valkenburg, Auteur ; J. Beyer, Auteur ; P. Champion, Auteur ; Julie Coetzee, Auteur ; Katia Diadema, Auteur ; S. Kritzinger-Klopper, Auteur ; E. Marchante, Auteur ; L. Piet, Auteur ; David M. Richardson, Auteur ; Ines Schönberger, Auteur Article en page(s) : pp. 357-370 Langues : Anglais (eng) Catégories : [Espèces (in biblio)] Hakea
[Thèmes] Flore vasculaire (phanérogames et cryptogames vasculaires)Mots-clés : espèce exotique envahissante Résumé : "Hakea sericea Schrad. & J.C.Wendl. (Proteaceae) is a shrub or small tree native to south-eastern Australia. The species has been introduced to other countries; it has naturalised and become invasive in France, New Zealand, Portugal, and South Africa. During the review process of the Pest Risk Analysis for the European and Mediterranean Plant Protection Organization (EPPO) on Hakea sericea in 2017, the actual identity of the plant causing major negative biodiversity impact in Portugal was questioned. Flowering material from Portugal and additional collections from South Africa and New Zealand were collected in order to clarify the taxonomical status. To make the survey on the proper identity of the Hakea plants invasive in Portugal more concise, all Hakea species encountered in Portugal, France, South Africa and New Zealand were included. For morphological distinction of the species the length of the pistil and fruit characters were used. For molecular analysis Illumina sequencing in combination with de novo assembly and extraction of loci was used. Results show that invasive populations of Hakea in Portugal belong to H. decurrens R.Br a species that, although very similar and sometimes considered synonymous with H. sericea, can be distinguished both morphologically and on the basis of cpDNA. Both species occur in France and in New Zealand, while only H. sericea occurs in South Africa. Both species are invasive and seem to have similar impacts on biodiversity in invaded ranges. The morphologically similar species H. gibbosa (J.White) Cav. occurs in both New Zealand and South Africa. By adopting the H. sericea sensu lato concept for inclusion of the species on the List of Union Concern pursuant of Regulation (EU) No 1143/2014, a potential legislative controversy can be prevented." (source : auteurs) Type de publication : périodique Référence biblio : Van Valkenburg J., Beyer J., Champion P., Coetzee J., Diadema K., Kritzinger-Klopper S., Marchante E., Piet L., Richardson D., Schönberger I., 2024 - Naturalised Hakea. What species are we actually talking about in Europe ? Botany letters, 171 (3) : 357-370. ID PMB : 72723 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=72723
in Botany letters > vol. 171, n°3 (Année 2024) . - pp. 357-370[article]Exemplaires(1)
Cote Localisation Disponibilité P0177-6 Brest Disponible
Titre : Monographs on invasive plants in Europe: Ageratina adenophora (Spreng.) R. M. King & H. Rob Auteurs : Guillaume Fried, Auteur ; Arunava Datta, Auteur ; Giuseppe Brundu, Auteur ; Daniel Chapman, Auteur ; Swen Follak, Auteur ; Danièle Frohlich, Auteur ; David M. Richardson, Auteur ; Johan Van Valkenburg, Auteur ; Rob Tanner, Auteur Article en page(s) : pp. 414-439 Langues : Anglais (eng) Catégories : [Espèces (in biblio)] Ageratina adenophora (Spreng.) R.M.King & H.Rob.
[ZG] EuropeMots-clés : espèce végétale invasive Résumé : "Ageratina adenophora (Spreng.) R.M. King & H. Rob. (Crofton wéed) is a triploid, apomictic perennial herb or sub-shrub native to Mexico that is highly invasive in many parts of. the world. This species thrives in diverse habitats, from wet forest margins to dry slopes and disturbed urban areas. Initially introduced globally as an ornamental plant, it has now naturalized across many continents, including Europe, Asia, Africa, Oceania, and the Americas, often displacing native flora and altering ecosystems. Its introduction to Europe dates back to the 19th century, with naturalization first recorded on the French Riviera. Ageratina adenophora is now established in several southern European countries (Portugal, Spain, France, Italy, Croatia, Greece) and across the Macaronesian islands. It spreads via wind- and water-dispersed seeds and can also propagate vegetatively, particularly along riparian systems and disturbed sites. Despite its prolific reproduction and adaptability, its expansion in Europe has so far remained moderate, possibly due to climatic limitations and unsuitable habitats. Ecologically, A. adenophora exhibits remarkable phenotypic plasticity and physiological adaptations that enable it to survive a range of abiotic stresses including cold, drought, and variable light levels. The species benefits from mutualisms with soil microbes and displays enhanced nitrogen-use efficiency in introduced ranges. Although initially valued for ornamental and medicinal purposes, A. adenophora is now widely recognized as a harmful invader. It invades both natural and semi-natural habitats and has demonstrated a capacity to alter soil chemistry, suppress native vegetation through competition and allelopathy, and host diverse pathogens and endophytes. Ageratina adenophora negatively impacts biodiversity, ecosystem functioning, and agriculture by forming dense, monospecific stands and disrupting native communities. Its presence in biodiversity hotspots and protected areas—such as Himalaya, South Africa, and the Canary Islands—poses significant conservation challenges. Control efforts, including the use of biological agents such as Procecidochares utifis Stone 1947, have yielded mixed results. The most effective method for small areas is to physically remove A. adenophora before it sets seed. This can be done by hand-pulling or cutting. Given the continued spread and resilience of this species there is an urgent need for coordinated management strategies and increased awareness, especially in the face of climate change which may further facilitate its expansion in Europe and beyond." (source : auteurs) Type de publication : périodique Référence biblio : Fried G., Datta A., Brundu G., Chapman D., Follak S., Frohlich D., Richardson D., Van Valkenburg J., Tanner R., 2025 - Monographs on invasive plants in Europe: Ageratina adenophora (Spreng.) R. M. King & H. Rob. Botany letters, 172 (4) : 414-439. ID PMB : 73356 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=73356
in Botany letters > vol. 172, n°4 (Année 2025) . - pp. 414-439[article]Exemplaires(1)
Cote Localisation Disponibilité P0177-6 Brest Disponible Alien 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 : texte imprimé 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 (eng) 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(0)
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Titre : Ecology and Biogeography of Pinus Type de document : texte imprimé 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 (eng) 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(1)
Cote Localisation Disponibilité B1 221 PINAC Brest Exclu du prêt
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 : texte imprimé Auteurs : Mirijam Gaertner, Auteur ; W. Konold, Auteur ; David M. Richardson, Auteur Année de publication : 2010 Article en page(s) : pp. 63-74 Langues : Anglais (eng) 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(0)
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