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Links across ecological scales: Plant biomass responses to elevated CO2.
Maschler, Julia; Bialic-Murphy, Lalasia; Wan, Joe; Andresen, Louise C; Zohner, Constantin M; Reich, Peter B; Lüscher, Andreas; Schneider, Manuel K; Müller, Christoph; Moser, Gerald; Dukes, Jeffrey S; Schmidt, Inger Kappel; Bilton, Mark C; Zhu, Kai; Crowther, Thomas W.
Afiliación
  • Maschler J; Institute of Integrative Biology, ETH Zurich (Swiss Federal Institute of Technology), Zurich, Switzerland.
  • Bialic-Murphy L; Institute of Integrative Biology, ETH Zurich (Swiss Federal Institute of Technology), Zurich, Switzerland.
  • Wan J; Institute of Integrative Biology, ETH Zurich (Swiss Federal Institute of Technology), Zurich, Switzerland.
  • Andresen LC; Department of Earth Sciences, University of Gothenburg, Gothenburg, Sweden.
  • Zohner CM; Institute of Integrative Biology, ETH Zurich (Swiss Federal Institute of Technology), Zurich, Switzerland.
  • Reich PB; Department of Forest Resources, University of Minnesota, St. Paul, Minnesota, USA.
  • Lüscher A; Hawkesbury Institute for the Environment, Western Sydney University, Penrith, New South Wales, Australia.
  • Schneider MK; Institute for Global Change Biology, and School for the Environment and Sustainability, University of Michigan, Ann Arbor, Michigan, USA.
  • Müller C; ETH Zurich, Institute of Agricultural Science, Zurich, Switzerland.
  • Moser G; Agroscope, Forage Production and Grassland Systems, Zurich, Switzerland.
  • Dukes JS; ETH Zurich, Institute of Agricultural Science, Zurich, Switzerland.
  • Schmidt IK; Agroscope, Forage Production and Grassland Systems, Zurich, Switzerland.
  • Bilton MC; Institute of Plant Ecology, Justus Liebig University, Giessen, Germany.
  • Zhu K; School of Biology and Environmental Science and Earth Institute, University College Dublin, Dublin, Ireland.
  • Crowther TW; Institute of Plant Ecology, Justus Liebig University, Giessen, Germany.
Glob Chang Biol ; 28(21): 6115-6134, 2022 11.
Article en En | MEDLINE | ID: mdl-36069191
The degree to which elevated CO2 concentrations (e[CO2 ]) increase the amount of carbon (C) assimilated by vegetation plays a key role in climate change. However, due to the short-term nature of CO2 enrichment experiments and the lack of reconciliation between different ecological scales, the effect of e[CO2 ] on plant biomass stocks remains a major uncertainty in future climate projections. Here, we review the effect of e[CO2 ] on plant biomass across multiple levels of ecological organization, scaling from physiological responses to changes in population-, community-, ecosystem-, and global-scale dynamics. We find that evidence for a sustained biomass response to e[CO2 ] varies across ecological scales, leading to diverging conclusions about the responses of individuals, populations, communities, and ecosystems. While the distinct focus of every scale reveals new mechanisms driving biomass accumulation under e[CO2 ], none of them provides a full picture of all relevant processes. For example, while physiological evidence suggests a possible long-term basis for increased biomass accumulation under e[CO2 ] through sustained photosynthetic stimulation, population-scale evidence indicates that a possible e[CO2 ]-induced increase in mortality rates might potentially outweigh the effect of increases in plant growth rates on biomass levels. Evidence at the global scale may indicate that e[CO2 ] has contributed to increased biomass cover over recent decades, but due to the difficulty to disentangle the effect of e[CO2 ] from a variety of climatic and land-use-related drivers of plant biomass stocks, it remains unclear whether nutrient limitations or other ecological mechanisms operating at finer scales will dampen the e[CO2 ] effect over time. By exploring these discrepancies, we identify key research gaps in our understanding of the effect of e[CO2 ] on plant biomass and highlight the need to integrate knowledge across scales of ecological organization so that large-scale modeling can represent the finer-scale mechanisms needed to constrain our understanding of future terrestrial C storage.
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Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Asunto principal: Dióxido de Carbono / Ecosistema Límite: Humans Idioma: En Revista: Glob Chang Biol Año: 2022 Tipo del documento: Article País de afiliación: Suiza

Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Asunto principal: Dióxido de Carbono / Ecosistema Límite: Humans Idioma: En Revista: Glob Chang Biol Año: 2022 Tipo del documento: Article País de afiliación: Suiza