, Volume 100, Issue 1–3, pp 121–137 | Cite as

Sources and ages of dissolved organic matter in peatland streams: evidence from chemistry mixture modelling and radiocarbon data

  • E. Tipping
  • M. F. Billett
  • C. L. Bryant
  • S. Buckingham
  • S. A. Thacker


Monitoring data over the period 1994–2007 were analysed for three streams (Cottage Hill Sike, CHS; Rough Sike, RS; Trout Beck, TB) draining blanket peat underlain by glacial clay and limestone-rich sub-strata at Moor House (Northern England). Dissolved organic carbon concentration, [DOC], showed complex relationships with both discharge and calcium concentration, [Ca]. A model based on [Ca] was constructed to simulate stream [DOC] by mixing dissolved organic matter (DOM) from shallow peat, quantified by measured [DOC] (15–30 mg l−1) in peat porewater, with DOM assumed to be present at a constant concentration (c. 5 mg l−1) in groundwater. A temperature-based adjustment to the measured porewater [DOC] was required to account for relatively low streamwater [DOC] during winter and spring. The fitted model reproduced short-term variation in streamwater [DOC] satisfactorily, in particular variability in RS and TB due to groundwater contributions. Streamwater DOM is largely derived from surface peat, which accounts for more than 96% of the total DOC flux in both RS and TB, and 100% in CHS. Model outputs were combined with streamwater and porewater DO14C data to estimate the 14C contents, and thereby the ages, of DOM from peat and groundwater. The peat-derived DOM is 5 years old on average, with most of it very recently formed. The derived age of groundwater DOM (8,500 years) is comparable to the 4,000–7,000 years estimated from the DO14C of water extracts of clay underlying the peat, suggesting that the clay is the source of groundwater DOM.


Carbon isotopes Discharge Dissolved organic matter Groundwater Peat Stream 


  1. Amundson R (2001) The carbon budget in soils. Annu Rev Earth Planet Sci 29:535–562CrossRefGoogle Scholar
  2. Benner R, Benitez-Nelson B, Amon RMW (2004) Export of young terrigenous dissolved organic carbon from rivers to the Arctic Ocean. Geophys Res Lett 31. doi:10.1029/2003GL019251
  3. Billett MF, Palmer SM, Hope D, Deacon C, Storeton-West R, Hargreaves KJ, Flechard C, Fowler D (2004) Linking land-atmosphere-stream carbon fluxes. Global Biogeochem Cycles 18: GB1024. doi:10.1029/2003GB002058
  4. Billett MF, Deacon C, Palmer SM, Dawson JJC, Hope D (2006) Connecting organic carbon in streamwater and soils in a peatland catchment. J Geophys Res—Biogeosci 111:GO2010. doi:10.1029/2005JG000065
  5. Billett MF, Garnett MH, Harvey F (2007) UK peatland streams release old carbon dioxide to the atmosphere and young dissolved organic carbon to rivers. Geophys Res Lett 34:L23401. doi:10.1029/2007GL031797 CrossRefGoogle Scholar
  6. Buckingham S, Tipping E, Hamilton-Taylor J (2008) Dissolved organic carbon in soil solutions: a comparison of collection methods. Soil Use Manage 24:29–36CrossRefGoogle Scholar
  7. Clark JM, Chapman PJ, Adamson JK, Lane SM (2005) Influence of drought-induced acidification on the mobility of dissolved organic carbon in peat soils. Global Change Biol 11:791–809CrossRefGoogle Scholar
  8. Clark JM, Lane SM, Chapman PJ, Adamson JK (2007) Export of dissolved organic carbon from an upland peatland during storm events: implications for flux estimates. J Hydrol 347:438–447CrossRefGoogle Scholar
  9. Clark JM, Lane SM, Chapman PJ, Adamson JK (2008) Link between DOC in near surface peat and stream water in an upland catchment. Sci Total Environ 404:308–315CrossRefGoogle Scholar
  10. Crisp DT (1966) Input and output of minerals for an area of Pennine moorland: the importance of precipitation, drainage, peat erosion and animals. J Appl Ecol 3:327–348CrossRefGoogle Scholar
  11. Dawson JJC, Bakewell C, Billett MF (2001) Is in-stream processing an important control on spatial changes in headwater carbon fluxes? Sci Total Environ 265:153–167CrossRefGoogle Scholar
  12. Dawson JJC, Billett MF, Neal C, Hill S (2002) A comparison of particulate, dissolved and gaseous carbon in two contrasting upland streams in the UK. J Hydrol 257:226–246CrossRefGoogle Scholar
  13. Evans MG, Burt TP, Holden J, Adamson JK (1999) Runoff generation and water table fluctuations in blanket peat: evidence from UK data spanning the dry summer of 1995. J Hydrol 221:141–160CrossRefGoogle Scholar
  14. Evans CD, Chapman PJ, Clark JM, Monteith DT, Cressser MS (2006) Alternative explanations for rising dissolved organic carbon export from organic soils. Global Change Biol 12:2044–2053CrossRefGoogle Scholar
  15. Evans CD, Freeman C, Cork LG, Thomas DN, Reynolds B, Billett MF, Garnett MH, Norris D (2007) Evidence against recent climate-induced destabilisation of soil carbon from C-14 analysis of riverine dissolved organic matter. Geophys Res Lett 34. doi:10.1029/2007GL029431
  16. Fenner N, Ostle NJ, McNamara N, Sparks T, Harmens H, Reynolds B, Freeman C (2007) Elevated CO2 effects on peatland plant community carbon dynamics and DOC production. Ecosystems 10:635–647CrossRefGoogle Scholar
  17. Freeman C, Ostle N, Kang H (2001a) An enzymic ‘latch’ on a global carbon store—a shortage of oxygen locks up carbon in peatlands by restraining a single enzyme. Nature 409:149CrossRefGoogle Scholar
  18. Freeman C, Evans CD, Monteith DT, Reynolds B, Fenner N (2001b) Export of organic carbon from peat soils. Nature 412:785CrossRefGoogle Scholar
  19. Freeman C, Fenner N, Ostle NJ, Kang H, Dowrick DJ, Reynolds B, Lock MA, Sleep D, Hughes S, Hudson J (2004) Export of dissolved organic carbon from peatlands under elevated carbon dioxide levels. Nature 430:195–198CrossRefGoogle Scholar
  20. Fröberg M, Jardine PM, Hanson PJ, Swanston CW, Todd DE, Tarver JR, Garten CT (2007) Low dissolved organic carbon input from fresh litter to deep mineral soils. Soil Sci Soc Am J 71:347–354CrossRefGoogle Scholar
  21. Heal OW, Smith R (1978) The Moor House Programme: introduction and site description. In: Heal OW, Perkins DF (eds) Production ecology of British Moors and Montane grasslands. Springer, Berlin, pp 3–16Google Scholar
  22. Helsel DR, Mueller DK, Slack JR (2006) Computer program for the Kendall family of trend tests: U.S. Geological Survey Scientific Investigations Report 2005-5275Google Scholar
  23. Hessen DO, Tranvik LJ (1998) Aquatic humic substances. Springer, BerlinGoogle Scholar
  24. Holden J, Adamson JK (2001) Gordon Manley and the north Pennines. J Meteorol 26:329–333Google Scholar
  25. Holden J, Burt TP (2003a) Runoff production in blanket peat covered catchments. Water Resour Res 39: doi:10.1029/2002WR001956
  26. Holden J, Burt TP (2003b) Hydrological studies on blanket peat: the significance of the acrotelm-catotelm model. J Ecol 91:86–102CrossRefGoogle Scholar
  27. Hua Q, Barbetti M (2004) Review of tropospheric bomb C-14 data for carbon cycle modeling and age calibration purposes. Radiocarbon 46:1273–1298Google Scholar
  28. Johnson GAL, Dunham KC (1963) The geology of Moor House. Her Majesty’s Stationery Office, LondonGoogle Scholar
  29. Jones HE, Gore AJP (1978) A simulation of production and decay in blanket bog. In: Heal OW, Perkins DF (eds) Production ecology of British moors and montane grasslands. Springer, Berlin, pp 160–186Google Scholar
  30. Kullberg A, Bishop KH, Hargeby A, Jansson M, Petersen RC (1993) The ecological significance of dissolved organic carbon in acidified waters. Ambio 22:331–337Google Scholar
  31. Lawrence H, Vincent K, Smith M, Colbeck C, Tang YS, Sutton MA, Simmons I, Love L, Vogt E, van Dijk N, Cape JN, Smith RI (2007) UK Acid Deposition Monitoring Network: Data Summary 2006. Report to the Department for Environment, Food and Rural Affairs and the Devolved Regions, AEA Energy and Environment, Harwell, 190 ppGoogle Scholar
  32. Levin I, Kromer B (2004) The tropospheric 14CO2 level in mid-latitudes of the Northern Hemisphere (1959–2003). Radiocarbon 46:1261–1272Google Scholar
  33. Meyer JL, Tate CM, Edwards RT, Crocker MT (1988) The trophic significance of dissolved organic carbon in streams. In: Swank WT, Crossley DA (eds) Forest hydrology and ecology at Coweeta. Springer, New York, pp 269–278Google Scholar
  34. Monteith DT, Stoddard JL, Evans CD, de Wit HA, Forsius M, Høgåsen T, Wilander A, Skjelkvåle BL, Jeffries DS, Vuorenmaa J, Keller B, Kopácek J, Vesely J (2007) Dissolved organic carbon trends resulting from changes in atmospheric deposition chemistry. Nature 450:537–541CrossRefGoogle Scholar
  35. Neff JC, Finlay JC, Zimov SA, Davydov SP, Carrasco JJ, Schuur EAG, Davydova AI (2006) Seasonal changes in the age and structure of dissolved organic carbon in Siberian rivers and streams. Geophys Res Lett 33. doi:10.1029/2006GL028222
  36. Opsahl S, Benner R, Amon RMW (1999) Major flux of terrigenous dissolved organic matter through the Arctic Ocean. Limnol Oceanogr 44:2017–2023CrossRefGoogle Scholar
  37. Palmer SM, Hope D, Billett MF, Dawson JC, Bryant CL (2001) Sources of organic and inorganic carbon in a headwater stream: evidence from carbon isotope studies. Biogeochemistry 52:321–338CrossRefGoogle Scholar
  38. Perdue EM, Gjessing ET (1990) Organic acids in aquatic ecosystems. Wiley, New YorkGoogle Scholar
  39. Raymond PA, McClelland JW, Holmes RM, Zhulidov AV, Mull K, Peterson BJ, Striegl RG, Aiken GR, Gurtovaya TY (2007) Flux and age of dissolved organic carbon exported to the Arctic Ocean: a carbon isotopic study of the five largest artic rivers. Glob Biogeochem Cycles 21: GB4011. doi:10.1029/2007GB002934
  40. Roulet N, Lafleur PM, Richard PJH, Moore TR, Humphreys ER, Bubier J (2007) Contemporary carbon balance and late Holocene carbon accumulation in a northern peatland. Glob Chang Biol 13:397–411CrossRefGoogle Scholar
  41. Schiff SL, Aravena R, Trumbore SE, Hinton MJ, Elgood R, Dillon PJ (1997) Export of DOC from forested catchments on the Precambrian Shield of Central Ontario: clues from 13C and 14C. Biogeochemistry 36:43–65CrossRefGoogle Scholar
  42. Stuiver M, Polach HA (1977) Discussion: reporting of 14C data. Radiocarbon 19:355–363Google Scholar
  43. Tipping E, Smith EJ, Bryant CL, Adamson JK (2007) The organic carbon dynamics of a moorland catchment in N.W. England. Biogeochemistry 84:171–189CrossRefGoogle Scholar
  44. Worrall F, Burt T (2005) Predicting the future DOC flux from upland peat catchments. J Hydrol 300:126–139CrossRefGoogle Scholar
  45. Worrall F, Burt TP, Jaeban RY, Warburton J, Shedden R (2002) Release of dissolved organic carbon from upland peat. Hydrol Proc 16:3487–3504CrossRefGoogle Scholar
  46. Worrall F, Burt TP, Adamson J (2003) Controls on the chemistry of runoff from an upland peat catchment. Hydrol Proc 17:2063–2083CrossRefGoogle Scholar
  47. Worrall F, Harriman R, Evans CD, Watts CD, Adamson JK, Neal C, Tipping E, Burt T, Grieve IC, Montieth D, Naden PS, Nisbet T, Reynolds B, Stevens P (2004) Trends in dissolved organic carbon in UK rivers and lakes. Biogeochemistry 70:369–402CrossRefGoogle Scholar
  48. Worrall F, Burt TP, Adamson J (2006) The rate of and controls upon DOC loss in a peat catchment. J Hydrol 321:311–325CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  • E. Tipping
    • 1
  • M. F. Billett
    • 2
  • C. L. Bryant
    • 3
  • S. Buckingham
    • 1
    • 4
  • S. A. Thacker
    • 1
  1. 1.Centre for Ecology and HydrologyLancaster Environment CentreLancasterUK
  2. 2.Centre for Ecology and HydrologyPenicuik, MidlothianUK
  3. 3.NERC Radiocarbon Facility (Environment), Scottish Enterprise Technology ParkEast KilbrideUK
  4. 4.Lancaster Environment CentreLancaster UniversityLancasterUK

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