Projected climate warming may substantially increase carbon emissions from wet organic soils, contributing to a positive feedback between the terrestrial carbon cycle and climate change. Evidence suggests that in these soils the stimulation of soil respiration by warming can be sustained over long periods of time due to the large availability of C substrates. However, the long-term response of wet organic soils to drought remains uncertain. Organo-mineral soils might be particularly vulnerable, because of their limited soil moisture pool to buffer drought events. Using a whole-ecosystem climate-change experiment in North Wales (UK) we show that soil respiration in podzolic (organo-mineral) soils from wet shrublands is more vulnerable to recurrent drought than to warming, and that the drought impact does not attenuate at decadal time scales. Stimulation of soil respiration by drought was linked to major changes in soil structure that led to a 54 % reduction in water holding capacity compared to control. Bryophyte abundance was found to buffer soil moisture losses, moderating soil CO2 efflux under warming. As there was no evidence of change in plant productivity to offset the increased soil C emissions under drought, this response may result in a positive climate feedback. The results indicate the potentially critical role that changes in sub-dominant vegetation and in soil physical properties may have in determining climate change impacts on soil C dynamics.
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Beier C, Emmett B, Gundersen P, Tietema A, Peñuelas J, Estiarte M, Gordon C, Gorissen A, Llorens L, Roda F, Williams D (2004) Novel approaches to study climate change effects on terrestrial ecosystems in the field: drought and passive nighttime warming. Ecosystems 7(6):583–597
Beier C, Emmett BA, Peñuelas J, Schmidt IK, Tietema A, Estiarte M, Gundersen P, Llorens L, Riis-Nielsen T, Sowerby A, Gorissen A (2008) Carbon and nitrogen cycles in European ecosystems respond differently to global warming. Sci Total Environ 407(1):692–697
Bellamy PH, Loveland PJ, Bradley RI, Lark RM, Kirk GJD (2005) Carbon losses from all soils across England and Wales 1978–2003. Nature 437(7056):245–248
Bol R, Blackwell M, Emmett BA, Reynolds B, Hall JA, Bhogal A, Ritz K ( 2011) Assessment of the response of organo-mineral soils to change in management practices. Sub-project ii of Project SP1106. UK Department of Environment and Rural Affair, London. http://sciencesearch.defra.gov.uk/. Accessed 23 June 2014
Bond-Lamberty B, Thomson A (2010) Temperature-associated increases in the global soil respiration record. Nature 464(7288):579–582
Borken W, Matzner E (2009) Reappraisal of drying and wetting effects on C and N mineralization and fluxes in soils. Glob Change Biol 15(4):808–824
Bradford MA (2013) Thermal adaptation of decomposer communities in warming soils. Front Microbiol 4:333. doi:10.3389/fmicb.2013.00333
Chapman SJ, Bell JS, Campbell CD, Hudson G, Lilly A, Nolan AJ, Robertson AHJ, Potts JM, Towers W (2013) Comparison of soil carbon stocks in Scottish soils between 1978 and 2009. Eur J Soil Sci 64(4):455–465
Christensen JH, Hewitson B, Busuioc A, Chen A, Gao X, Held I, Jones R, Kolli RK, Kwon WT, Laprise R, Magaña-Rueda V, Mearns L, Menéndez CG, Räisänen J, Rinke A, Sarr A, Whetton P (2007) Regional climate projections. In: Solomon S, Qin D, Manning M, Chen MZ, Marquis M, Averyt KB, Tignor M, Miller HL (eds) Climate change 2007: the physical science basis. Contribution of working group I to the fourth assessment report of the intergovernmental panel on climate change. Cambridge University Press, Cambridge
Cranfield University (2014) The Soils Guide. www.landis.org.uk. Cranfield University, UK (http://www.landis.org.uk/services/soilsguide/series.cfm?serno=755). Accessed 18 Nov 2014
Dai A (2013) Increasing drought under global warming in observations and models. Nature Clim Change 3(1):52–58
Denman KL, Brasseur G, Chidthaisong A, Ciais P, Cox PM, Dickinson RE, Hauglustaine D, Heinze C, Holland E, Jacob D, Lohmann U, Ramachandran S, da Silva Dias PL, Wofsy SC, Zhang X (2007) Couplings between changes in the climate system and biogeochemistry. In: Solomon S, Qin D, Manning M, Chen MZ, Marquis M, Averyt KB, Tignor M, Miller HL (eds) Climate change 2007: the physical science basis contribution of working group I to the fourth assessment report of the intergovernmental panel on climate change. Cambridge University Press, Cambridge, pp 500–587
Dorrepaal E, Toet S, van Logtestijn RSP, Swart E, van de Weg MJ, Callaghan TV, Aerts R (2009) Carbon respiration from subsurface peat accelerated by climate warming in the subarctic. Nature 460(7255):616–619
Eliasson PE, McMurtrie RE, Pepper DA, Strömgren M, Linder S, Ågren GI (2005) The response of heterotrophic CO2 flux to soil warming. Glob Change Biol 11(1):167–181
Fenner N, Freeman C (2011) Drought-induced carbon loss in peatlands. Nature Geosci 4(12):895–900
Freeman C, Ostle N, Kang H (2001) An enzymic ‘latch’ on a global carbon store. Nature 409(6817):149
Friedlingstein P, Cox P, Betts R, Bopp L, von Bloh W, Brovkin V, Cadule P, Doney S, Eby M, Fung I, Bala G, John J, Jones C, Joos F, Kato T, Kawamiya M, Knorr W, Lindsay K, Matthews HD, Raddatz T, Rayner P, Reick C, Roeckner E, Schnitzler KG, Schnur R, Strassmann K, Weaver AJ, Yoshikawa C, Zeng N (2006) Climate–carbon cycle feedback analysis: results from the C4MIP model intercomparison. J Climate 19(14):3337–3353
Garten C, Classen A, Norby R (2009) Soil moisture surpasses elevated CO2 and temperature as a control on soil carbon dynamics in a multi-factor climate change experiment. Plant Soil 319(1–2):85–94
Gorissen A, Tietema A, Joosten NN, Estiarte M, Peñuelas J, Sowerby A, Emmett BA, Beier C (2004) Climate change affects carbon allocation to the soil in shrublands. Ecosystems 7(6):650–661
Hall J, Curti C, Dore T, Smith R (2014) Methods for the calculation of critical loads and their exceedances in the UK, draft report to UK Department of Environment and Rural Affairs-DEFRA. http://nora.nerc.ac.uk/505595/. Accessed 25 June 2014
Hartley IP, Heinemeyer A, Ineson P (2007) Effects of three years of soil warming and shading on the rate of soil respiration: substrate availability and not thermal acclimation mediates observed response. Glob Change Biol 13(8):1761–1770
Ise T, Dunn AL, Wofsy SC, Moorcroft PR (2008) High sensitivity of peat decomposition to climate change through water-table feedback. Nature Geosci 1(11):763–766
Kirschbaum MUF (2004) Soil respiration under prolonged soil warming: are rate reductions caused by acclimation or substrate loss? Glob Change Biol 10(11):1870–1877
Knorr W, Prentice IC, House JI, Holland EA (2005) Long-term sensitivity of soil carbon turnover to warming. Nature 433(7023):298–301
Lindo Z, Nilsson M-C, Gundale MJ (2013) Bryophyte-cyanobacteria associations as regulators of the northern latitude carbon balance in response to global change. Glob Change Biol 19(7):2022–2035
Liu W, Zhang ZHE, Wan S (2009) Predominant role of water in regulating soil and microbial respiration and their responses to climate change in a semiarid grassland. Glob Change Biol 15(1):184–195
Luo Y (2007) Terrestrial carbon–cycle feedback to climate warming. Annu Rev Ecol Evol Syst 38(1):683–712
Luo Y, Wan S, Hui D, Wallace LL (2001) Acclimatization of soil respiration to warming in a tall grass prairie. Nature 413(6856):622–625
Melillo JM, Steudler PA, Aber JD, Newkirk K, Lux H, Bowles FP, Catricala C, Magill A, Ahrens T, Morrisseau S (2002) Soil warming and carbon-cycle feedbacks to the climate system. Science 298(5601):2173–2176
Nilsson MC, Wardle D (2005) Understory vegetation as a forest ecosystem driver: evidence from the northern Swedish boreal forest. Front Ecol Environ 3(8):421–428
Peacock M, Jones TG, Airey B, Johncock A, Evans CD, Lebron I, Fenner N, Freeman C (2014) The effect of peatland drainage and rewetting (ditch blocking) on extracellular enzyme activities and water chemistry. Soil Use Manage. doi:10.1111/sum.12138
Peng X, Horn R (2007) Anisotropic shrinkage and swelling of some organic and inorganic soils. Eur J Soil Sci 58(1):98–107
Peng X, Horn R, Smucker A (2007) Pore shrinkage dependency of inorganic and organic soils on wetting and drying cycles. Soil Sci Soc Am J 71(4):1095–1104
Reynolds B, Chamberlain PM, Poskitt J, Woods C, Scott WA, Rowe EC, Robinson DA, Frogbrook ZL, Keith AM, Henrys PA, Black HIJ, Emmett BA (2013) Countryside Survey: national “soil change” 1978–2007 for topsoils in Great Britain—acidity, carbon, and total nitrogen status. Vadose Zone J 12(2)
Rillig MC, Mummey DL (2006) Mycorrhizas and soil structure. New Phytol 171(1):41–53
Rousk J, Smith AR, Jones DL (2013) Investigating the long-term legacy of drought and warming on the soil microbial community across five European shrubland ecosystems. Glob Change Biol 19(12):3872–3884
Rustad L, Campbell J, Marion G, Norby R, Mitchell M, Hartley A, Cornelissen J, Gurevitch J, Gcte N (2001) A meta-analysis of the response of soil respiration, net nitrogen mineralization, and aboveground plant growth to experimental ecosystem warming. Oecologia 126(4):543–562
Schindler U, Durner W, von Unold G, Mueller L, Wieland R (2010) The evaporation method: extending the measurement range of soil hydraulic properties using the air-entry pressure of the ceramic cup. J Plant Nutr Soil Sci 173(4):563–572
Shaver GR, Giblin AE, Nadelhoffer KJ, Thieler KK, Downs MR, Laundre JA, Rastetter EB (2006) Carbon turnover in Alaskan tundra soils: effects of organic matter quality, temperature, moisture and fertilizer. J Ecol 94(4):740–753
Six J, Frey SD, Thiet RK, Batten KM (2006) Bacterial and fungal contributions to carbon sequestration in agroecosystems. Soil Sci Soc Am J 70(2):555–569
Sowerby A, Emmett B, Beier C, Tietema A, Peñuelas J, Estiarte M, Van Meeteren MJM, Hughes S, Freeman C (2005) Microbial community changes in heathland soil communities along a geographical gradient: interaction with climate change manipulations. Soil Biol Biochem 37(10):1805–1813
Sowerby A, Emmett BA, Tietema A, Beier C (2008) Contrasting effects of repeated summer drought on soil carbon efflux in hydric and mesic heathland soils. Glob Change Biol 14(10):2388–2404
Suseela V, Conant RT, Wallenstein MD, Dukes JS (2012) Effects of soil moisture on the temperature sensitivity of heterotrophic respiration vary seasonally in an old-field climate change experiment. Glob Change Biol 18(1):336–348
Toberman H, Freeman C, Evans C, Fenner N, Artz RRE (2008) Summer drought decreases soil fungal diversity and associated phenol oxidase activity in upland Calluna heathland soil. FEMS Microbiol Ecol 66(2):426–436
Turetsky M (2003) The role of bryophytes in carbon and nitrogen cycling. Bryologist 106(3):395–409
Turetsky MR, Bond-Lamberty B, Euskirchen E, Talbot J, Frolking S, McGuire AD, Tuittila ES (2012) The resilience and functional role of moss in boreal and arctic ecosystems. New Phytol 196(1):49–67
van Oldenborgh GJ, Collins M, Arblaster J, Christensen JH, Marotzke J, Power SB, Rummukainen M (2013) Annex I: atlas of global and regional climate projections. In: Stocker TF, Qin D, Plattner GK, Tignor M, Allen SK, Boschung J, Nauels A, Xia Y, Bex V, Midgley PM (eds) Climate change 2013: the physical science basis contribution of working group I to the fifth assessment report of the intergovernmental panel on climate change. Cambridge University Press, Cambridge
Vicca S, Fivez L, Kockelbergh F, Van Pelt D, Segers JJR, Meire P, Ceulemans R, Janssens IA (2009) No signs of thermal acclimation of heterotrophic respiration from peat soils exposed to different water levels. Soil Biol Biochem 41(9):2014–2016
Wilson GWT, Rice CW, Rillig MC, Springer A, Hartnett DC (2009) Soil aggregation and carbon sequestration are tightly correlated with the abundance of arbuscular mycorrhizal fungi: results from long-term field experiments. Ecol Lett 12(5):452–461
Wu Z, Dijkstra P, Koch GW, Peñuelas J, Hungate BA (2011) Responses of terrestrial ecosystems to temperature and precipitation change: a meta-analysis of experimental manipulation. Glob Change Biol 17(2):927–942
Xiang W, Freeman C (2009) Annual variation of temperature sensitivity of soil organic carbon decomposition in North peatlands: implications for thermal responses of carbon cycling to global warming. Environ Geol 58(3):499–508
Yuste JC, Peñuelas J, Estiarte M, Garcia-Mas J, Mattana S, Ogaya R, Pujol M, Sardans J (2011) Drought-resistant fungi control soil organic matter decomposition and its response to temperature. Glob Change Biol 17(3):1475–1486
We thank all the CEH staff members who have contributed to the experiment establishment and maintenance over the years, in particular David Williams. This research was funded by the EU projects CLIMOOR, VULCAN and INCREASE FP7-INFRASTRUCTURE-2008-1 (Grant Agreement no. 227628)—the INCREASE project. M.T.D was supported by two postdoctoral fellowships awarded by the Spanish National Science and Technology Foundation.
Responsible Editor: Dr. Stuart Grandy.
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Domínguez, M.T., Sowerby, A., Smith, A.R. et al. Sustained impact of drought on wet shrublands mediated by soil physical changes. Biogeochemistry 122, 151–163 (2015). https://doi.org/10.1007/s10533-014-0059-y
- Soil respiration
- Water retention
- Calluna vulgaris
- Soil structure