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Ajouter le résultat dans votre panierHow do plant community ecologists consider the complementarity of observational, experimental and theoretical modelling approaches ? / Thomas Spiegelberger in Plant Ecology and Evolution, 145 (1) (2012)
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
in Plant Ecology and Evolution > 145 (1) (2012) . - 4-12Spiegelberger, 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)
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Titre : First-year results of a multi-treatment steppe restoration experiment in La Crau (Provence, France) Type de document : Imprimé Auteurs : Renaud Jaunatre (1986-) ; Elise Buisson (1977-) ; Thierry Dutoit (1967-) Année de publication : 2012 Article en page(s) : 13-23 Langues : Anglais (eng) Catégories : [CBNPMP-Géographique] La Crau
[CBNPMP-Géographique] Provence
[CBNPMP-Thématique] Restauration des écosystèmesRésumé : Background and aims – Intense agriculture phases on old plant communities, such as Mediterranean steppes, can lead to low resilience. Two main obstacles to the spontaneous recolonization of these plant communities are often the low dispersal of target species and the high dispersal and establishment potential of unwanted species. The aim of the study is to find the most efficient restoration treatments to restore these plant communities. Methods – After the rehabilitation of an herbaceous sheep-grazed community on a formerly intensively cultivated orchard in the last French Mediterranean steppe (La Crau, Provence, France), four experimental restoration treatments were applied to restore the steppe plant community: (i) topsoil removal to lower ruderal species seed banks and soil trophic levels, (ii) nurse species seeding to rapidly occupy niches, and then to provide safe sites for target species once sheep grazing is reintroduced, (iii) hay transfer to provide local species seeds, and (iv) soil transfer to provide local species propagules with associated microorganisms. One year later, plant species richness, composition and diversity are compared. Results – Although the communities developing on areas seeded with nurse species and where topsoil was removed differed most widely from the reference ecosystem, i.e. steppe, these restoration treatments succeeded in achieving their goal by significantly lowering the abundance of unwanted dominant species. While hay transfer did not have a significantly higher species richness than that of the rehabilitated area, it showed promising results, as some germinations of target species were observed. One year only after the treatment was applied, soil transfer provided a community richness and composition very close to that of the reference ecosystem, but not with the same vegetation structure. Conclusion – In order to restore plant community composition, the more the treatment strengthens community dispersal, the more efficient it is. The gain in efficiency is closely linked with the cost of the treatment. Lien pérenne : DOI : 10.5091/plecevo.2012.690 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=142094
in Plant Ecology and Evolution > 145 (1) (2012) . - 13-23Jaunatre, Renaud (1986-), Buisson, Elise (1977-), Dutoit, Thierry (1967-) 2012 First-year results of a multi-treatment steppe restoration experiment in La Crau (Provence, France). Plant Ecology and Evolution, 145(1): 13-23.Exemplaires (1)
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Article (2012)Adobe Acrobat PDF
