Oecologia

, Volume 146, Issue 4, pp 652–658 | Cite as

Nitrogen supply differentially affects litter decomposition rates and nitrogen dynamics of sub-arctic bog species

  • R. Aerts
  • R. S. P. van Logtestijn
  • P. S. Karlsson
Global Change Ecology

Abstract

High-latitude peatlands are important soil carbon sinks. In these ecosystems, the mineralization of carbon and nitrogen are constrained by low temperatures and low nutrient concentrations in plant litter and soil organic matter. Global warming is predicted to increase soil N availability for plants at high-latitude sites. We applied N fertilizer as an experimental analogue for this increase. In a three-year field experiment we studied N fertilization effects on leaf litter decomposition and N dynamics of the four dominant plant species (comprising >75% of total aboveground biomass) in a sub-arctic bog in northern Sweden. The species were Empetrum nigrum (evergreen shrub), Eriophorum vaginatum (graminoid), Betula nana (deciduous shrub) and Rubus chamaemorus (perennial forb). In the controls, litter mass loss rates increased in the order: Empetrum < Eriophorum < Betula < Rubus. Increased N availability had variable, species-specific effects: litter mass loss rates (expressed per unit litter mass) increased in Empetrum, did not change in Eriophorum and Betula and decreased in Rubus. In the leaf litter from the controls, we measured no or only slight net N mineralization even after three years. In the N-fertilized treatments we found strong net N immobilization, especially in Eriophorum and Betula. This suggests that, probably owing to substantial chemical and/or microbial immobilization, additional N supply does not increase the rate of N cycling for at least the first three years.

Keywords

Carbon storage Global warming Litter chemistry Nitrogen cycling Peatland 

References

  1. Aerts R (1997) Climate, leaf litter chemistry and leaf litter decomposition in terrestrial ecosystems: a triangular relationship. Oikos 79:439–449CrossRefGoogle Scholar
  2. Aerts R, Chapin FS (2000) The mineral nutrition of wild plants revisited: a re-evaluation of processes and patterns. Adv Ecol Res 30:1–67CrossRefGoogle Scholar
  3. Aerts R, De Caluwe H (1997) Nutritional and plant-mediated controls on leaf litter decomposition of Carex species. Ecology 78:244–260Google Scholar
  4. Berg B, Matzner E (1996) Effect of N deposition on plant litter and soil organic matter in forest systems. Environmental Rev 5:1–25CrossRefGoogle Scholar
  5. Berg B, Berg MP, Bottner P et al. (1993) Litter mass loss rates in pine forests of Europe and Eastern United States: some relationships with climate and litter quality. Biogeochemistry 20:127–159CrossRefGoogle Scholar
  6. Cornelissen JHC (1996) An experimental comparison of leaf decomposition rates in a wide range of temperate plant species and types. J Ecol 84:573–582CrossRefGoogle Scholar
  7. Gorham E (1991) Northern peatlands: role in the carbon cycle and probable responses to climatic warming. Ecol Appl 1:182–195CrossRefGoogle Scholar
  8. Harborne JB (1997) Role of phenolic secondary metabolites in plants and their degradation in nature. In: Cadisch G, Giller KE (eds), Driven by nature: plant litter quality and decomposition. CAB International, Wallingford, pp 67–74Google Scholar
  9. Hättenschwiler S, Vitousek PM (2000) The role of polyphenols in terrestrial ecosystem nutrient cycling. Trends Ecol Evol 15:238–243CrossRefPubMedGoogle Scholar
  10. Hobbie SE, Vitousek PM (2000) Nutrient limitation of decomposition in Hawaiian forests. Ecology 81:1867–1877CrossRefGoogle Scholar
  11. Houghton JT, Ding Y, Griggs DJ et al. (2001) Climate change 2001: the scientific basis third IPCC report. Cambridge University Press, CambridgeGoogle Scholar
  12. Jonasson S, Michelsen M, Schmidt IK, Nielsen EV, Callaghan TV (1996) Microbial biomass C, N and P in two arctic soils and responses to addition of NPK fertilizer and sugar: implications for plant nutrient uptake. Oecologia 106:507–515CrossRefGoogle Scholar
  13. Köchy M, Wilson SD (1997) Litter decomposition and nitrogen dynamics in aspen forest and mixed-grass prairie. Ecology 78:732–739Google Scholar
  14. Kögel-Knabner I (2002) The macromolecular organic composition of plant and microbial residues as inputs to soil organic matter. Soil Biol& Biochem34:139–162CrossRefGoogle Scholar
  15. Kraus TEC, Dahlgren RA, Zasoski RJ (2003) Tannins in nutrient dynamics of forest ecosystems–a review. Plant and Soil 256:41–66CrossRefGoogle Scholar
  16. Kraus TEC, Zasoski RJ, Dahlgren RA (2004) Fertility and pH effects on polyphenol and condensed tannin concentrations in foliage and roots. Plant and Soil 262:95–109CrossRefGoogle Scholar
  17. Melillo JM, Aber JD, Muratore JF (1982) Nitrogen and lignin control of hardwood leaf litter decomposition dynamics. Ecology 63:621–626CrossRefGoogle Scholar
  18. Palm CA, Rowland AP (1997) A minimum dataset for characterization of plant quality for decomposition. In: Cadisch G, Giller KE (eds), Driven by nature: plant litter quality and decomposition. CAB International, Wallingford, pp 379–392Google Scholar
  19. Pastor J, Stillwell MA, Tilman D (1987) Little bluestem litter dynamics in Minnesota old fields. Oecologia 72:327–330CrossRefGoogle Scholar
  20. Poorter H, Villar R (1997) The fate of acquired carbon in plants: chemical composition and construction costs. In: Bazzaz FA, Grace J (eds), Plant resource allocation. Academic Press, San Diego, pp 39–72Google Scholar
  21. Quested HM, Cornelissen JHC, Press MC et al. (2003) Litter decomposition of sub-arctic plant species with differing nitrogen economies: a potential functional role for hemiparasites. Ecology 84:3209–3221CrossRefGoogle Scholar
  22. Quinn GP, Keough MJ (2002) Experimental design and data analysis for biologists. Cambridge University Press, CambridgeGoogle Scholar
  23. Robinson CH (2002) Controls on decomposition and soil nitrogen availability at high latitudes. Plant Soil 242:65–81CrossRefGoogle Scholar
  24. Robinson CH, Wookey PA, Parsons AN, Potter JA, Lee JA, Callaghan TV, Press MC, Welker JM (1995) Responses of plant litter decomposition and nitrogen mineralisation to simulated environmental change in a high arctic polar semi-desert and a subarctic dwarf shrub heath. Oikos 74:503–512CrossRefGoogle Scholar
  25. Rustad LE, Campbell JL, Marion GM et al (2001) A meta-analysis of the response of soil respiration, net nitrogen mineralization, and aboveground plant growth to experimental ecosystem warming. Oecologia 126:543–562CrossRefGoogle Scholar
  26. Schimel JP, Cates RG, Ruess R (1998) The role of balsam poplar secondary chemicals in controlling soil nutrient dynamics through succession in the Alaskan taiga. Biogeochemistry 42:221–234CrossRefGoogle Scholar
  27. Shaw MR, Harte J (2001) Control of litter decomposition in a subalpine meadow-sagebrush steppe ecotone under climate change. Ecol Appl 11:1206–1223Google Scholar
  28. Sonesson M (1980) Ecology of a subarctic mire. Ecological Bulletins 30 (Stockholm).Google Scholar
  29. Swift MJ, Heal OW, Anderson JM (1979). Decomposition in terrestrial ecosystems. University of California Press, BerkeleyGoogle Scholar
  30. Tietema A (1993) Mass loss and nitrogen dynamics in decomposing acid forest litter in the Netherlands at increased nitrogen deposition. Biogeochemistry 20:45–62CrossRefGoogle Scholar
  31. Vitousek PM, Turner DR, Parton WJ, Sanford RL (1994) Litter decomposition on the Mauna Loa environmental matrix, Hawaii: patterns, mechanisms, and models. Ecology 75:418–429CrossRefGoogle Scholar

Copyright information

© Springer-Verlag 2005

Authors and Affiliations

  • R. Aerts
    • 1
  • R. S. P. van Logtestijn
    • 1
  • P. S. Karlsson
    • 2
    • 3
  1. 1.Institute of Ecological Science, Department of Systems EcologyVrije UniversiteitHV AmsterdamThe Netherlands
  2. 2.Abisko Scientific Research StationThe Royal Swedish Academy of SciencesAbiskoSweden
  3. 3.Department of Plant EcologyEBC, Uppsala UniversityUppsalaSweden

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