[article]
| 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 |
in Proceedings of the National Academy of Sciences of the United States of America > 110 (46) (2013) . - 18561-18565
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.
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Microclimate moderates plant responses to macroclimate warming in Proceedings of the National Academy of Sciences of the United States of America, 110 (46) (2013)
