Portail documentaire

How do plant community ecologists consider the complementarity of observational, experimental and theoretical modelling approaches ? / Thomas Spiegelberger in Plant Ecology and Evolution, 145 (1) (2012) 

Public Citation [article]  inPlant Ecology and Evolution > 145 (1) (2012) . - 4-12 Titre : How do plant community ecologists consider the complementarity of observational, experimental and theoretical modelling approaches ? Type de document : Imprimé Auteurs : Thomas Spiegelberger ; François Gillet (1959-) ; Bernard Amiaud ; Aurélie Thébault ; Pierre Mariotte ; Alexandre Buttler Année de publication : 2012 Article en page(s) : 4-12 Langues : Anglais (eng) Résumé : Background and aims : A large variety of methods are used by ecologists for studies at plant community level. While early works were mainly descriptive, more manipulative experiments are now being undertaken because they provide a better functional understanding and a greater insight into underlying mechanisms. Mathematical models are also being increasingly used, in particular for predicting biodiversity under global change. The aim of this study is to highlight the strengths, limitations, and advantages of these three approaches, namely observational, experimental and theoretical modelling. Methods : We assessed 149 papers published during the last four years in three specialized disciplinary journals (DJ) and 151 papers in three generalist high impact journals (HIJ) dealing with plant ecology, and checked the methods that were used. We asked participants of the ECOVEG7 meeting held in Switzerland (Lausanne, April 2011) whether observational, experimental and theoretical modelling approaches can, or should, be used alone or in combination when studying plant communities and ecosystem functioning in the context of global change. Key results : About 50% of articles published in both journal types used only a single approach. Nevertheless, papers in HIJ used the approaches in similar proportions, while articles in DJ had eight times more observational than modelling studies. Combined approaches represented only 8% in DJ, while this percentage was more than double in HIJ. Conclusion : Plant community ecologists favour a combination of several approaches, but for practical difficulties (communicating among people using different approaches and publication strategies), single approach studies are generally preferred. A combination of the three highlighted approaches seems to be the most appropriate way to respond to future challenges in plant community ecology such as biodiversity loss and impact of climate change as such studies require work on different temporal and spatial scales. Lien pérenne : DOI : 10.5091/plecevo.2012.699 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=142092 Spiegelberger, Thomas, Gillet, François (1959-), Amiaud, Bernard, Thébault, Aurélie, Mariotte, Pierre, Buttler, Alexandre 2012 How do plant community ecologists consider the complementarity of observational, experimental and theoretical modelling approaches ? Plant Ecology and Evolution, 145(1): 4-12.

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
R11939	P-1464	Revue	Centre de documentation	Revues	Consultable

Documents numériques

Consultable Article (2012) Adobe Acrobat PDF

Modern pollen assemblages from grazed vegetation in the western Pyrenees, France: a numerical tool for more precise reconstruction of past cultural landscapes / Florence Mazier in The holocene, 16 (1) (2006) 

Public Citation [article]  inThe holocene > 16 (1) (2006) . - 91-103 Titre : Modern pollen assemblages from grazed vegetation in the western Pyrenees, France: a numerical tool for more precise reconstruction of past cultural landscapes Type de document : Imprimé Auteurs : Florence Mazier ; Didier Galop ; Cécile Brun ; Alexandre Buttler Année de publication : 2006 Article en page(s) : 91-103 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Palynologie, conservation des pollens [CBNPMP-Thématique] Pastoralisme Résumé : Modern pollen assemblages from grazed vegetation in the Pyrenees Mountains (France) were studied with the aim of providing a calibrated model for reconstructing past pastoral activities. The modern analogues were selected to cover the major gradients of grazing pressure and degree of openness. The vegetation was surveyed by means of the synusial integrated method, assessing the structure and the patchiness of the pastoral phytoceonoses. A correlative model (Redundancy analysis) was devised relating 61 modern pollen spectra with 37 explanatory vegetation and land-use variables. It was shown that wooded, open grazed and nitrophilous sites are clearly separated from one another and that the model can be simplified using three relevant vegetation types as explanatory variables: dry heathland, semi-open oak forest and overgrazed community, respectively related to gradients of openness, soil richness and grazing pressure. When reconstructing past pastoral activities with fossil pollen spectra, it is important to consider scale-dependent influences of plant species. Low frequencies of well-dispersed taxa such as Artemisia, Chenopodiaceae, Plantago lanceolata and Plantago major/media must be interpreted with care since they reflect more regional, rather than local, input into the pastoral landscape. In contrast, the simultaneous occurrence of Asteroideae, Cichorioideae, Cirsium-type, Galium-type, Ranunculaceae, Stellaria-type and Potentilla-type pollen is clearly related to grazing on a local scale. Calculation of Davis indices also shows that Cichorioideae, Galium-type and Potentilla-type indicate the very local presence of the corresponding plants. These pastoral plant indicators may have a limited geographical validity, ie, mountainous regions with crystalline bedrock, which may indeed also provide the framework for the application to fossil spectra of the modern pollen/vegetation/land-use models presented here. Lien pérenne : HAL : halshs-00959347 / DOI : 10.1191/0959683606hl908rp Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=148582 Mazier, Florence, Galop, Didier, Brun, Cécile, Buttler, Alexandre 2006 Modern pollen assemblages from grazed vegetation in the western Pyrenees, France: a numerical tool for more precise reconstruction of past cultural landscapes. The holocene, 16(1): 91-103.

Documents numériques

Consultable Article (2006) URL