Portail documentaire

Microclimate moderates plant responses to macroclimate warming / Pieter de Frenne in Proceedings of the National Academy of Sciences of the United States of America, 110 (46) (2013) 

Public Citation [article]  inProceedings of the National Academy of Sciences of the United States of America > 110 (46) (2013) . - 18561-18565 Titre : Microclimate moderates plant responses to macroclimate warming Type de document : Imprimé Auteurs : Pieter de Frenne ; Francisco Rodríguez-Sánchez ; David Anthony Coomes ; Lander Baeten ; Gorik Verstraeten ; Mark Vellend ; Markus Bernhardt-Römermann ; Carissa D. Brown ; Jörg Brunet ; Johnny Cornelis ; Guillaume Decocq ; Hartmut Dierschke (1937-) ; Ove Eriksson ; Frank S. Gilliam ; Radim Hédl ; Thilo Heinken ; Martin Hermy ; Patrick Hommel ; Michael A. Jenkins ; Daniel L. Kelly ; Keith Kirby ; Fraser J. G. Mitchell ; Tobias Naaf ; Miles Newman ; George Peterken ; Petr Petrik ; Jan Schultz ; Grégory Sonnier ; Hans Van Calster ; Donald M. Waller ; Gian-Reto Walther ; Peter White ; Kerry D. Woods ; Monika Wulf ; Bente Jessen Graae ; Kris Verheyen Année de publication : 2013 Article en page(s) : 18561-18565 Langues : Anglais (eng) Résumé : Signifiance : Around the globe, climate warming is increasing the dominance of warm-adapted species—a process described as “thermophilization.” However, thermophilization often lags behind warming of the climate itself, with some recent studies showing no response at all. Using a unique database of more than 1,400 resurveyed vegetation plots in forests across Europe and North America, we document significant thermophilization of understory vegetation. However, the response to macroclimate warming was attenuated in forests whose canopies have become denser. This microclimatic effect likely reflects cooler forest-floor temperatures via increased shading during the growing season in denser forests. Because standing stocks of trees have increased in many temperate forests in recent decades, microclimate may commonly buffer understory plant responses to macroclimate warming. Abstract : Recent global warming is acting across marine, freshwater, and terrestrial ecosystems to favor species adapted to warmer conditions and/or reduce the abundance of cold-adapted organisms (i.e., “thermophilization” of communities). Lack of community responses to increased temperature, however, has also been reported for several taxa and regions, suggesting that “climatic lags” may be frequent. Here we show that microclimatic effects brought about by forest canopy closure can buffer biotic responses to macroclimate warming, thus explaining an apparent climatic lag. Using data from 1,409 vegetation plots in European and North American temperate forests, each surveyed at least twice over an interval of 12–67 y, we document significant thermophilization of ground-layer plant communities. These changes reflect concurrent declines in species adapted to cooler conditions and increases in species adapted to warmer conditions. However, thermophilization, particularly the increase of warm-adapted species, is attenuated in forests whose canopies have become denser, probably reflecting cooler growing-season ground temperatures via increased shading. As standing stocks of trees have increased in many temperate forests in recent decades, local microclimatic effects may commonly be moderating the impacts of macroclimate warming on forest understories. Conversely, increases in harvesting woody biomass—e.g., for bioenergy—may open forest canopies and accelerate thermophilization of temperate forest biodiversity Lien pérenne : DOI : 10.1073/pnas.1311190110 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=149290 Frenne, Pieter de, Rodríguez-Sánchez, Francisco, Coomes, David Anthony, Baeten, Lander, Verstraeten, Gorik, Vellend, Mark, Bernhardt-Römermann, Markus, Brown, Carissa D., Brunet, Jörg, Cornelis, Johnny, Decocq, Guillaume, Dierschke, Hartmut (1937-), Eriksson, Ove, Gilliam, Frank S., Hédl, Radim, Heinken, Thilo, Hermy, Martin, Hommel, Patrick, Jenkins, Michael A., Kelly, Daniel L., Kirby, Keith, Mitchell, Fraser J. G., Naaf, Tobias, Newman, Miles, Peterken, George, Petrik, Petr, Schultz, Jan, Sonnier, Grégory, Calster, Hans Van, Waller, Donald M., Walther, Gian-Reto, White, Peter, Woods, Kerry D., Wulf, Monika, Graae, Bente Jessen, Verheyen, Kris 2013 Microclimate moderates plant responses to macroclimate warming. Proceedings of the National Academy of Sciences of the United States of America, 110(46): 18561-18565.

Documents numériques

Consultable Article (2013) URL

Vegetation classification and biogeography of European floodplain forests and alder carrs / Jan Douda in Applied vegetation science, 18 (11/2015) 

Public Citation [article]  inApplied vegetation science > 18 (11/2015) . - 17 p. Titre : Vegetation classification and biogeography of European floodplain forests and alder carrs Type de document : Électronique Auteurs : Jan Douda ; Karel Boublik ; Michal Slezak ; Idoia Biurrun ; Josef Nociar ; Alena Havrodová ; Jana Doudová ; Svetlana Acic ; Henri Brisse ; Jörg Brunet ; Milan Chytrý (1967-) ; Hugues Claessens ; János Csiky ; Yakiv Didukh ; Panayotis Dimopoulos ; Stefan Dullinger ; Una FitzPatrick ; Antoine Guisan (1966-) ; Peter J. Horchler ; Richard Hrivnák ; Ute Jandt ; Zygmunt Kącki ; Balázs Kevey ; Flavia Landucci ; Hugues Lecomte ; Jonathan Lenoir ; Jaanus Paal ; David Paternoster ; Harald Pauli ; Remigiusz Pielech ; John S. Rodwell ; Bart Roelandt ; Jens-Christian Svenning ; Jozef Šibík ; Urban Silc ; Zeljko Skvorc ; Ioannis Tsiripidis ; Rossen T. Tzonev ; Thomas Wohlgemuth ; Niklaus E. Zimmermann Année de publication : 2015 Article en page(s) : 17 p. Langues : Anglais (eng) Résumé : Aim: Formalized classifications synthesizing vegetation data at the continental scale are being attempted only now, although they are of key importance for nature conservation planning. Therefore, we aim to provide a vegetation classification and to describe the main biogeographical patterns of floodplain forests and alder carrs in Europe. Location: Europe. Methods: A database of more than 40 000 vegetation plots of floodplain forests and alder carrs across Europe was compiled. After geographic stratification, 16 392 plots were available for classification, which was performed using the supervised method Cocktail. We also searched for new associations using semi-supervised K- means classification. The main biogeographic patterns and climate-related gradients in species composition were determined using detrended correspondence analysis and cluster analysis. Results: Thirty associations of floodplain forests and alder carrs were distinguished, which belong to five alliances. The Alnion incanae includes riparian, seepage and hardwood floodplain forests in the nemoral and hemiboreal zones (dominated by Alnus glutinosa and Fraxinus excelsior) and in the boreal zone (dominated by A. incana). The Osmundo-Alnion represents oceanic vegetation dominated by Alnus glutinosa, Fraxinus angustifolia and F. excelsior distributed mostly on the Iberian Peninsula and composed of species with Atlantic distribution and Iberian endemics. The Populion albae comprises floodplain forests frequently dominated by Fraxinus angustifolia, Populus alba and P. nigra that are widespread in floodplains of large rivers under summer-dry climates in the Mediterranean region. The Platanion orientalis represents eastern Mediterranean floodplain forests dominated by Platanus orientalis. The Alnion glutinosae includes forest swamps dominated by Alnus glutinosa distributed mostly in the nemoral and hemiboreal zones. The main biogeographic patterns within European floodplain forests and alder carrs reflect the climatic contrasts between the Mediterranean, nemoral, boreal and mountain regions. Oceanic flood-plain forests differ from those in the rest of Europe. The hydrological regime appears to be the most important factor influencing species composition within regions. Conclusions: This study is the first applying a formalized classification at the association level for a broad vegetation type at the continental scale. The proposed classification provides the scientific basis for the necessary improvement of the habitat classification systems used in European nature conservation Lien pérenne : DOI : 10.1111/avsc.12201 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=143079 Douda, Jan, Boublik, Karel, Slezak, Michal, Biurrun, Idoia, Nociar, Josef, Havrodová, Alena, Doudová, Jana, Acic, Svetlana, Brisse, Henri, Brunet, Jörg, Chytrý, Milan (1967-), Claessens, Hugues, Csiky, János, Didukh, Yakiv, Dimopoulos, Panayotis, Dullinger, Stefan, FitzPatrick, Una, Guisan, Antoine (1966-), Horchler, Peter J., Hrivnák, Richard, Jandt, Ute, Kącki, Zygmunt, Kevey, Balázs, Landucci, Flavia, Lecomte, Hugues, Lenoir, Jonathan, Paal, Jaanus, Paternoster, David, Pauli, Harald, Pielech, Remigiusz, Rodwell, John S., Roelandt, Bart, Svenning, Jens-Christian, Šibík, Jozef, Silc, Urban, Skvorc, Zeljko, Tsiripidis, Ioannis, Tzonev, Rossen T., Wohlgemuth, Thomas, Zimmermann, Niklaus E. 2015 Vegetation classification and biogeography of European floodplain forests and alder carrs. Applied vegetation science, 18: 17 p..

Documents numériques

Consultable Article (2015) URL