, Volume 16, Issue 3, pp 521–528 | Cite as

Nitrogen Translocation to Fresh Litter in Northern Hardwood Forest

  • Ang Li
  • Timothy J. FaheyEmail author


Nitrogen immobilization in fresh litter represents a significant N flux in forest ecosystems, and changes in this process resulting from atmospheric N deposition could have important implications for ecosystem responses. We conducted two leaf decay experiments, using 15N-labeled sugar maple leaf litter, to quantify N transport from old litter and soil to fresh litter during early stages of decomposition, and we examined the influence of litter N concentration and soil N availability on upward N transfer in a northern hardwood forest. After one year of decay, the average N transfer from soil to fresh litter (2.63 mg N g−1 litter) was much higher than the N transfer from older litter (1- to 2-years-old) to fresh litter (0.37 mg N g−1 litter). We calculated the ratio of annual N transfer per unit of excess 15N pool for these two N sources. The ratio was not significantly different between old litter and soil, suggesting that fungi utilize N in the old litter and mineral soil pools for transport to decaying fresh litter with similar efficiency. Initial litter N concentration had a significant effect on upward N flux into decaying leaf litter, whereas no effect of soil N fertilization was observed. Reduction in the flux from soil to fresh litter owing to anthropogenic N inputs probably contributes significantly to changing soil N dynamics. Future work is needed on fungal N acquisition and transport as well as the fungal taxa involved in this process and their responses to changing environments.


fungi isotope tracer litter decay nitrogen immobilization nitrogen saturation sugar maple 



We appreciate Alexis Heinz and Ruth Sherman for their assistance in field experiments and Teresa Pawlowska for reviewing the manuscript. This research was supported by the Biogeochemistry and Environmental Biocomplexity Program from Cornell University.


  1. Aber J, McDowell W, Nadelhoffer K, Magill A, Berntson G, Kamakea M, McNulty S, Currie W, Rustad L, Fernandez I. 1998. Nitrogen saturation in temperate forest ecosystems. Bioscience 48:921–34.CrossRefGoogle Scholar
  2. Aber JD, Goodale CL, Ollinger SV, Smith M, Magill AH, Martin ME, Hallett RA, Stoddard JL. 2003. Is nitrogen deposition altering the nitrogen status of northeastern forests? Bioscience 52:375–89.CrossRefGoogle Scholar
  3. Berg B, Staaf H (1981) Decomposition rate and chemical changes of scotch pine needle litter, 2. Influence of chemical composition. In: Persson T, Ed Ecological Bulletins, No. 32, Structure and function of northern coniferous forests: an ecosystem study. Stockholm: Swedish natural science research council. pp. 373–90.Google Scholar
  4. Blair JM, Crossley DA, Callaham LC. 1992. Effects of litter quality and microanthropods on N dynamics and retention of exogenous 15N in decomposing litter. Biol Fertil Soils 12:241–52.CrossRefGoogle Scholar
  5. Boberg JB, Finlay RD, Stenlid J, Lindahl BD. 2009. Fungal C translocation restricts N-mineralization in heterogeneous environments. Funct Ecol 24:454–9.CrossRefGoogle Scholar
  6. Boddy L. 1999. Saprotrophic cord-forming fungi: meeting the challenge of heterogeneous environments. Mycologia 91:13–32.CrossRefGoogle Scholar
  7. Currie WS. 1999. The responsive C and N biogeochemistry of the temperate forest floor. Trends Ecol Evol 14:316–20.PubMedCrossRefGoogle Scholar
  8. Fahey TJ, Yavitt JB, Pearson JA, Knight DH. 1985. The nitrogen cycle in lodgepole pine forests, southeastern Wyoming. Biogeochemistry 1:257–75.CrossRefGoogle Scholar
  9. Fahey TJ, Yavitt JB, Sherman RE, Groffman PM, Fisk MC, Maerz JC. 2011. Transport of carbon and nitrogen between litter and soil organic matter in a northern hardwood forest. Ecosystems 14:326–40.CrossRefGoogle Scholar
  10. Fisk MC, Fahey TJ, Groffman PM, Bohlen PJ. 2004. Earthworm invasion, fine root distributions, and soil respiration in north temperate forests. Ecosystems 7:55–62.CrossRefGoogle Scholar
  11. Frey SD, Elliott ET, Paustian K, Peterson GA. 2000. Fungal translocation as a mechanism for soil nitrogen inputs to surface residue decomposition in a no-tillage agroecosystem. Soil Biol Biochem 32:689–98.CrossRefGoogle Scholar
  12. Frey SD, Six J, Elliott ET. 2003. Reciprocal transfer of carbon and nitrogen by decomposer fungi at the soil-litter interface. Soil Biol Biochem 35:1001–4.CrossRefGoogle Scholar
  13. Goodale CL, Aber JD, Vitousek PM. 2003. An unexpected nitrate decline in New Hampshire streams. Ecosystems 6:75–86.CrossRefGoogle Scholar
  14. Gosz JR, Likens GE, Bormann FH. 1973. Nutrient release from decomposing leaf and branch litter in the Hubbard Brook Forest New Hampshire. Ecol Monogr 43:173–91.CrossRefGoogle Scholar
  15. Hart SC, Firestone MK. 1991. Forest floor-mineral soil interactions in the internal nitrogen cycle of an old-growth forest. Biogeochemistry 12:103–27.CrossRefGoogle Scholar
  16. Lindahl BO, Taylor AFS, Finlay RD. 2002. Defining nutritional constraints on carbon cycling in boreal forests—toward a less ‘phytocentric’ perspective. Plant Soil 242:123–35.CrossRefGoogle Scholar
  17. Martin CW, Driscoll CT, Fahey TJ. 2000. Changes in streamwater chemistry after 20 years from forested watersheds in New Hampshire, USA. Can J For Res 30:1206–13.CrossRefGoogle Scholar
  18. McClaugherty CA, Pastor J, Aber JD, Melillo JM. 1985. Forest litter decomposition in relation to soil N dynamics and litter quality. Ecology 66:266–75.CrossRefGoogle Scholar
  19. Melillo JM, Aber JD, Muratore JF. 1982. Nitrogen and lignin control of hardwood leaf litter decomposition dynamics. Ecology 63:621–6.CrossRefGoogle Scholar
  20. Micks P, Aber JD, Boone RD, Davidson EA. 2004. Short-term soil respiration and nitrogen immobilization response to nitrogen applications in control and nitrogen-enriched temperate forests. For Ecol Manage 196:57–70.CrossRefGoogle Scholar
  21. Parton W, Silver WL, Burke IC, Grassens L, Harmon ME, Currie WS, King JY, Adair EC, Brandt LA, Hart SC, Fasth B. 2007. Global-scale similarities in nitrogen release patterns during long-term decomposition. Science 315:361–4.PubMedCrossRefGoogle Scholar
  22. Templer PH et al. 2012. Sinks for nitrogen inputs in terrestrial ecosystems: a meta-analysis of 15N tracer field studies. Ecology 93:1816–29.PubMedCrossRefGoogle Scholar
  23. Tlalka M, Watkinson SC, Darrah PR, Fricker MD. 2002. Continuous imaging of amino-acid translocation in intact mycelia of Phanerochaete velutina reveals rapid, pulsatile fluxes. New Phytol 153:173–84.CrossRefGoogle Scholar
  24. Tlalka M, Hensman D, Darrah PR, Watkinson SC, Fricker MD. 2003. Noncircadian oscillations in amino acid transport have complementary profiles in assimilatory and foraging hyphae of Phanerochaete velutina. New Phytol 158:325–35.CrossRefGoogle Scholar
  25. Tlalka M, Bebber D, Darrah PR, Watkinson SC. 2008. Mycelial networks: nutrient uptake, translocation and role in ecosystems. In: Boddy L, Frankland J, van West P, Eds. Ecology of Saprotrophic Basidiomycetes. 1st edn. London: Academic Press. p 43–62.CrossRefGoogle Scholar
  26. Watkinson SC, Bebber D, Darrah P, Fricker M, Tlalka M. 2007. The role of wood decay fungi in the C and N dynamics of forest floor. In: Gadd GM, Ed. Fungi in biogeochemical cycles. London: Cambridge University Press. p 151–81.Google Scholar

Copyright information

© Springer Science+Business Media New York 2012

Authors and Affiliations

  1. 1.Department of Natural ResourcesCornell UniversityIthacaUSA

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