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Free atmospheric CO2 enrichment increased above ground biomass but did not affect symbiotic N2-fixation and soil carbon dynamics in a mixed deciduous stand in Wales

By M. R. Hoosbeek, Martin Lukac, E. J. Velhorst, A. R. Smith and D. L. Godbold

Abstract

Through increases in net primary production (NPP), elevated CO2 is hypothesizes to increase the amount of plant litter entering the soil. The fate of this extra carbon on the forest floor or in mineral soil is currently not clear. Moreover, increased rates of NPP can be maintained only if forests can escape nitrogen limitation. In a Free atmospheric CO2 Enrichment (FACE) experiment near Bangor, Wales, 4 ambient CO2 and 4 FACE plots were planted with patches of Betula pendula, Alnus glutinosa and Fagus sylvatica on a former arable field. Four years after establishment, only a shallow L forest floor litter layer had formed due to intensive bioturbation. Total soil C and N contents increased irrespective of treatment and species as a result of afforestation. We could not detect an additional C sink in the soil, nor were soil C stabilization processes affected by FACE. We observed a decrease of leaf N content in Betula and Alnus under FACE, while the soil C/N ratio decreased regardless of CO2 treatment. The ratio of N taken up from the soil and by N2-fixation in Alnus was not affected by FACE. We infer that increased nitrogen use efficiency is the mechanism by which increased NPP is sustained under elevated CO2 at this site

Publisher: Copernicus Publications
Year: 2011
OAI identifier: oai:centaur.reading.ac.uk:18381

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Citations

  1. (2008). Altered patterns of soil carbon substrate usage and heterotrophic respiration in a pine forest with elevated CO2
  2. (2007). Altered soil microbial community at elevated CO2 leads to loss of soil carbon,
  3. (2000). Applicability of the natural 15N abundance technique to measure N2 fixation in Arachis hypogaea grown on an Ultisol,
  4. (2007). Carbon Dioxide Effects on Heterotrophic Dinitrogen Fixation in a Temperate Pine Forest, Soil Sci.
  5. (2000). Carbon-13 input and turn-over in a pasture soil exposed to long-term elevated atmospheric CO2,
  6. (2006). Conifer stem growth at the altitudinal treeline in response to four years of CO2 enrichment,
  7. (2007). Contributions to accelerating atmospheric CO2 growth from economic activity, carbon intensity, and efficiency of natural sinks,
  8. (2009). Coppicing shifts CO2 stimulation of poplar productivity to above-ground pools: a synthesis of leaf to stand level results from the POP/EUROFACE experiment,
  9. (1990). Effect of nodulation, nitrogen fixation and CO2 enrichment on the physiology, growth and dry mass allocation of seedlings of Alnus rubra
  10. (2003). Effects of elevated carbon dioxide concentration on growth and nitrogen fixation in Alnus glutinosa in a long-term field experiment, doi
  11. (2006). Element interactions limit soil carbon storage, doi
  12. (2009). Elevated CO2 effects on plant carbon, nitrogen, and water relations: six important lessonsfrom FACE,
  13. (1979). Estimate of symbiotically fixed nitrogen in field grown soybeans using variations in 15N natural abundance,
  14. (1989). Estimation of symbiotic dinitrogen fixation in alder forest by the method based on natural 15N abundance,
  15. (2003). Europe’s terrestrial biosphere absorbs 7 to 12% of Europen anthropogenic CO2 emissions,
  16. (2002). Forest carbon balance under elevated CO2,
  17. (2006). Free atmospheric CO2 enrichment (FACE) increased labile and total carbon in the mineral soil of a short rotation Poplar plantation,
  18. (2003). Free-air CO2 enrichment (FACE) enhances biomass production in a short-rotation poplar plantation,
  19. (1997). Growth and nitrogen accretion of dinitrogen-fixing Alnus glutinosa (L.) Gaertn. under elevated carbon dioxide,
  20. (2011). Hoosbeek et al.: Elevated [CO2] did not affect N2-fixation and soil C dynamics
  21. (2011). Hoosbeek et al.: Elevated [CO2] did not affect N2-fixation and soil C dynamics 363 carbon dioxide increases soil carbon,
  22. (2003). Importance of mechanisms and processes of the stabilisation of soil organic matter for modelling carbon turnover,
  23. (2009). Increased litter build up and soil organic matter stabilization in a poplar plantation after 6 years of atmospheric CO2 enrichment (FACE): Final results of POP-EuroFACE compared to other forest FACE experiments,
  24. (2007). Increased nitrogen-use efficiency of a short-rotation polar plantation in elevated CO2 concentration,
  25. (2007). Increases in nitrogen uptake rather than nitrogenuse efficiency support higher rates of temperate forest productivity under elevated CO2,
  26. (1996). Manual for soil and water analysis, Backhuys publishers,
  27. (2004). More new carbon in the mineral soil of a poplar plantation under Free Air Carbon Enrichment (POPFACE): Cause of increased priming effect?,
  28. (2005). Net carbon storage in a poplar plantation (POPFACE) after three years of free-air CO2 enrichment,
  29. (1999). Net primary production of a forest ecosystem with experimental CO2 enrichment,
  30. (2006). Organic C and N stabilization in a forest soil: Evidence from sequential density fractionation, doi
  31. (2000). Role of the soil matrix and minerals in protecting natural organic materials against biological attack,
  32. (2005). Soil carbon sequestration and turnover in a pine forest after six years of atmospheric CO2 enrichment,
  33. (1988). Soil Organic Matter Turnover in Long-term Field Experiments as Revealed by
  34. (1993). Soil Survey Division Staff: Soil Survey Manual,
  35. (2006). Stabilization of organic matter in temperate soils: mechanisms and their relevance under different soil conditions – a review,
  36. (2006). Temperature sensitivity of soil carbon decomposition and feedbacks to climate change,
  37. (2003). The contemporary carbon cycle, in:
  38. (2010). The effect of atmospheric CO2 enrichment on biogeochemical cycling of a temperate forest ecosystem, PhD, School of Environment, Natural Resources and Geography,
  39. (2002). Tree and livestock productivity in relation to tree planting configuration in a silvopastoral system in North Wales,
  40. (2003). Troposheric O3 moderates responses of temperate hardwood forests to elevated CO2: a synthesis of molecular to ecosystem results from the Aspen FACE project,

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