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Thirty-Year Repeat Measures of Mangrove Above- and Below-Ground Biomass Reveals Unexpectedly High Carbon Sequestration

  • Karen Lamont
  • Neil SaintilanEmail author
  • Jeffrey J. Kelleway
  • Debashish Mazumder
  • Atun Zawadzki


Mangrove ecosystems store large quantities of organic carbon for long periods of time. This study explores organic carbon stock change through the first comparative study of radiometric analysis and repeat field measures over a multi-decadal period in a mangrove system. Examining one tall gallery forest of Avicennia marina, and an adjacent interior scrub mangrove of mixed Avicennia marina and Aegiceras corniculatum, radiometric analysis estimated a soil organic carbon accumulation rate of 4.3 ± 0.6 Mg C ha−1 y−1 in the tall gallery forest and 2.2 ± 0.5 Mg C ha−1 y−1 in a stunted mangrove. Repeat measures of root carbon separated by 30 years estimated an increase of 5.06 Mg C ha−1 y−1 in the tall forest and 6.63 Mg C ha−1 y−1 in the stunted forest—suggesting an underestimate of carbon accumulation by radiometric dating of 15% and 67% in the tall and stunted forest, respectively. A higher carbon stock in the interior forest was attributed to root mass increase, associated with landward mangrove encroachment. Extrapolated to the entire region of NSW we estimate that mangrove encroachment has contributed at least about 1.8 Tg C sequestration over the 70 years for which this has been observed in New South Wales, Australia.


blue carbon mangrove stock change organic carbon 



We thank Jennifer Van Holsten and Sabika Maizma at the Australian Nuclear Science and Technology Organisation (ANSTO) for their assistance with the radiometric analysis. Nicole Cormier made valuable comments on an earlier draft of the manuscript. The analysis was funded by an ANSTO research grant and AINSE Honours award to KL. Figure 8 incorporates content from Christine Thurbur IAN Image Library (, used with permission.


  1. Adame MF, Cherian S, Reef R, Stewart-Koster B. 2017. Mangrove root biomass and the uncertainty of below-ground carbon estimations. For Ecol Manag 403:52–60.CrossRefGoogle Scholar
  2. Alongi DM. 2008. Mangrove forests: resilience, protection from tsunamis, and responses to global climate change. Estuar Coast Shelf Sci 76:1–13.CrossRefGoogle Scholar
  3. Appleby P, Oldfield F. 1978. The calculation of lead-210 dates assuming a constant rate of supply of unsupported 210 Pb to the sediment. Catena 5:1–8.CrossRefGoogle Scholar
  4. Atahan P, Heijnis H, Dodson J, Grice K, Le Metayer P, Taffs K, Hembrow S, Woltering M, Zawadzki A. 2015. Pollen, biomarker and stable isotope evidence of late Quaternary environmental change at Lake McKenzie, southeast Queensland. J Paleolimnol 53:139–56.CrossRefGoogle Scholar
  5. Bouillon S, Borges AV, Castañeda-Moya E, Diele K, Dittmar T, Duke NC, Kristensen E, Lee SY, Marchand C, Middelburg JJ, Rivera-Monroy VH, Smith TJ, Twilley RR. 2008. Mangrove production and carbon sinks: A revision of global budget estimates. Global Biogeochemical Cycles 22:1–12.CrossRefGoogle Scholar
  6. Bulmer RH, Schwendenmann L, Lundquist CJ. 2016. Carbon and nitrogen stocks and below-ground allometry in temperate mangroves. Frontiers in Marine Science 3:150.CrossRefGoogle Scholar
  7. Cavanaugh KC, Kellner JR, Forde AJ, Gruner DS, Parker JD, Rodriguez W, Feller IC. 2014. Poleward expansion of mangroves is a threshold response to decreased frequency of extreme cold events. Proceedings of the National Academy of Sciences 111:723–7.CrossRefGoogle Scholar
  8. Chmura GL. 2013. What do we need to assess the sustainability of the tidal salt marsh carbon sink? Ocean and Coastal Management 83:25–31.CrossRefGoogle Scholar
  9. Cormier N, Twilley RR, Ewel KC, Krauss KW. 2015. Fine root productivity varies along nitrogen and phosphorus gradients in high-rainfall mangrove forests of Micronesia. Hydrobiologia 750:69–87.CrossRefGoogle Scholar
  10. Crosby SC, Sax DF, Palmer ME, Booth HS, Deegan LA, Bertness MD, Leslie HM. 2016. Salt marsh persistence is threatened by predicted sea-level rise. Estuarine, Coastal and Shelf Science 181:93–9.CrossRefGoogle Scholar
  11. Doughty CL, Langley JA, Walker WS, Feller IC, Schaub R, Chapman SK. 2016. Mangrove range expansion rapidly increases coastal wetland carbon storage. Estuaries and Coasts 39:385–96.CrossRefGoogle Scholar
  12. Duarte CM, Middelburg JJ, Caraco N. 2005. Major role of marine vegetation on the oceanic carbon cycle. Biogeosciences 2:1–8.CrossRefGoogle Scholar
  13. Eslami-Andargoli L, Dale PER, Sipe N, Chaseling J. 2009. Mangrove expansion and rainfall patterns in Moreton Bay, southeast Queensland, Australia. Estuarine, Coastal and Shelf Science 85:292–8.CrossRefGoogle Scholar
  14. Fink D, Hotchkis M, Hua Q, Jacobsen G, Smith AM, Zoppi U, Child D, Mifsud C, Van Der Gaast H, Williams A, Williams M. 2004. The ANTARES AMS facility at ANSTO. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 223–224:109–15.CrossRefGoogle Scholar
  15. Golley FB, Odum HT, Wilson RF. 1962. The structure and metabolism of a Puerto Rico red mangrove forest in May. Ecology 43:9–19.CrossRefGoogle Scholar
  16. Grimsditch G, Alder J, Nakamura T, Kenchington R, Tamelander J. 2013. The blue carbon special edition—introduction and overview. Ocean and Coastal Management 83:1–4.CrossRefGoogle Scholar
  17. Howard J, Hoyt S, Isensee K, Pidgeon E, Telszewski M. 2014. Coastal Blue carbon: methods for assessing carbon stocks and emissions factors in mangroves, tidal salt marshes, and seagrass meadows. Intergov. Oceanogr. Comm. UNESCO, Int. Union Conserv. Nature. Arlington, Virginia, USA.Google Scholar
  18. Howe AJ, Rodríguez JF, Saco PM. 2009. Surface evolution and carbon sequestration in disturbed and undisturbed wetland soils of the Hunter estuary, southeast Australia. Estuarine Coastal and Shelf Science 84:75–83.CrossRefGoogle Scholar
  19. Hua Q, Jacobsen GE, Zoppi U, Lawson EM, Williams AA, Smith AM, McGann MJ. 2001. Progress in radiocarbon target preparation at the ANTARES AMS centre. Radiocarbon 43:275–82.CrossRefGoogle Scholar
  20. Kelleway JJ, Saintilan N, Macreadie PI, Ralph PJ. 2016a. Sedimentary factors are key predictors of carbon storage in SE Australian Saltmarshes. Ecosystems 19:865–80.CrossRefGoogle Scholar
  21. Kelleway JJ, Saintilan N, Macreadie PI, Skilbeck CG, Zawadzki A, Ralph PJ. 2016b. Seventy years of continuous encroachment substantially increases “blue carbon” capacity as mangroves replace intertidal salt marshes. Global Change Biology 22:1097–109.CrossRefGoogle Scholar
  22. Kelleway JJ, Cavanaugh K, Rogers K, Feller IC, Ens E, Doughty C, Saintilan N. 2017a. Review of the ecosystem service implications of mangrove encroachment into salt marshes. Global Change Biology 23:3967–83.CrossRefGoogle Scholar
  23. Kelleway JJ, Serrano O, Baldock J, Cannard T, Lavery P, Lovelock CE, Macreadie PI, Masqué P, Saintilan N, Steven AD. 2017b. Technical review of opportunities for including blue carbon in the Australian Government’s Emissions Reduction Fund. Canberra, ACT: CSIRO.Google Scholar
  24. Kelleway JJ, Mazumder D, Baldock JA, Saintilan N. 2018. Carbon isotope fractionation in the mangrove Avicennia marina has implications for food web and blue carbon research. Estuarine Coastal and Shelf Science 205:68–74.CrossRefGoogle Scholar
  25. Komiyama A, Ogino K, Aksornkoae S, Sabhasri S. 1987. Root biomass of a mangrove forest in southern Thailand. 1. Estimation by the trench method and the zonal structure of root biomass. Journal of Tropical Ecology 3:97–108.CrossRefGoogle Scholar
  26. Kroeger KD, Crooks S, Moseman-Valtierra S, Tang J. 2017. Restoring tides to reduce methane emissions in impounded wetlands: a new and potent Blue Carbon climate change intervention. Scientific reports 7:11914.CrossRefGoogle Scholar
  27. Lang’at JKS, Kirui BKY, Skov MW, Kairo JG, Mencuccini M, Huxham M. 2013. Species mixing boosts root yield in mangrove trees. Oecologia 172:271–8.CrossRefGoogle Scholar
  28. Lovelock CE, Cahoon DR, Friess DA, Guntenspergen GR, Krauss KW, Reef R, Rogers K, Saunders ML, Sidik F, Swales A, Saintilan N, Thuyen LX, Triet T. 2015. The vulnerability of Indo-Pacific mangrove forests to sea-level rise. Nature 526:559-U217.CrossRefGoogle Scholar
  29. Lunstrum A, Chen L. 2014. Soil carbon stocks and accumulation in young mangrove forests. Soil Biol. Biochem. 75:223–32.CrossRefGoogle Scholar
  30. Maher DT, Call M, Santos IR, Sanders CJ. 2018. Beyond burial: lateral exchange is a significant atmospheric carbon sink in mangrove forests. Biology Letters 14:20180200.CrossRefGoogle Scholar
  31. Marchand C. 2017. Soil carbon stocks and burial rates along a mangrove forest chronosequence (French Guiana). Forest Ecology and Management 384:92–9.CrossRefGoogle Scholar
  32. Marland G, McCarl BA, Schneider UWE. 2001. Soil carbon: policy and economics. Climate Change 51:101–17.CrossRefGoogle Scholar
  33. McKee KL. 2001. Root proliferation in decaying roots and old root channels: a nutrient conservation mechanism in oligotrophic mangrove forests? Journal of Ecology: 876–887.Google Scholar
  34. McKee KL, Cahoon DR, Feller IC. 2007. Caribbean mangroves adjust to rising sea level through biotic controls on change in soil elevation. Global Ecology and Biogeography 16:545–56.CrossRefGoogle Scholar
  35. Mcleod E, Chmura GL, Bouillon S, Salm R, Björk M, Duarte CM, Lovelock CE, Schlesinger WH, Silliman BR. 2011. A blueprint for blue carbon: toward an improved understanding of the role of vegetated coastal habitats in sequestering CO2. Frontiers in Ecology and the Environment 9:552–60.CrossRefGoogle Scholar
  36. Nie M, Lu M, Bell J, Raut S, Pendall E. 2013. Altered root traits due to elevated CO2: a meta-analysis. Global Ecology and Biogeography 22:1095–105.CrossRefGoogle Scholar
  37. Osland MJ, Spivak AC, Nestlerode JA, Lessmann JM, Almario AE, Heitmuller PT, Russell MJ, Krauss KW, Alvarez F, Dantin DD, Harvey JE, From AS, Cormier N, Stagg CL. 2012. Ecosystem development after mangrove wetland creation: plant-soil change across a 20-year chronosequence. Ecosystems 15:848–66.CrossRefGoogle Scholar
  38. Owers CJ, Rogers K, Woodroffe CD. 2018. Spatial variation of above-ground carbon storage in temperate coastal wetlands Estuarine. Coastal and Shelf Science 210:55–67.CrossRefGoogle Scholar
  39. Pethick JS. 1981. Long-term accretion rates on tidal salt marshes. Journal of Sedimentary Research 51:571–7.CrossRefGoogle Scholar
  40. Reef R, Winter K, Morales J, Adame M, Reef DL. 2015. The effect of atmospheric carbon dioxide concentrations on the performance of the mangrove Avicennia germinans over a range of salinities. Physiolgia Plantarum 154:358–68.CrossRefGoogle Scholar
  41. Rogers K, Boon PI, Branigan S, Duke NC, Field CD, Fitzsimons JA, Kirkman H, Mackenzie JR, Saintilan N. 2016. The state of legislation and policy protecting Australia’s mangrove and salt marsh and their ecosystem services. Marine Policy 72:139–55.CrossRefGoogle Scholar
  42. Rogers K, Saintilan N, Mazumder D, Kelleway JJ. 2019. Vegetation Shift and Blue Carbon: an 18-year field measurement record of transition from saltmarsh to mangrove. Biological Letters 15(3):20180471.CrossRefGoogle Scholar
  43. Rogers K, Wilton KM, Saintilan N. 2006. Vegetation change and surface elevation dynamics in estuarine wetlands of southeast Australia. Estuarine, Coastal and Shelf Science 66:559–69.CrossRefGoogle Scholar
  44. Saintilan N. 1997. Above and below-ground biomasses of two species of mangrove on the Hawkesbury River estuary, New South Wales. Marine and Freshwater Research 48:147–52.CrossRefGoogle Scholar
  45. Saintilan N, Hashimoto TR. 1999. Mangrove-saltmarsh dynamics on a bay-head delta in the Hawkesbury River estuary, New South Wales, Australia. Hydrobiologia 413:95–102.CrossRefGoogle Scholar
  46. Saintilan N, Rogers K, Mazumder D, Woodroffe C. 2013. Allochthonous and autochthonous contributions to carbon accumulation and carbon store in southeastern Australian coastal wetlands. Estuarine Coastal and Shelf Science 128:84–92.CrossRefGoogle Scholar
  47. Saintilan N, Williams R. 1999. Mangrove transgression into saltmarsh environments in south-east Australia. Global Ecology and Biogeography 8:117–24.CrossRefGoogle Scholar
  48. Saintilan N, Wilton K. 2001. Changes in the distribution of mangroves and saltmarshes in Jervis Bay, Australia. Wetlands Ecology and Management 9:409–20.CrossRefGoogle Scholar
  49. Saintilan N, Wilson NC, Rogers K, Rajkaran A, Krauss KW. 2014. Mangrove expansion and salt marsh decline at mangrove poleward limits. Global Change Biology 20:147–57.CrossRefGoogle Scholar
  50. Saintilan N, Rogers K, McKee KL. 2019. The shifting saltmarsh-mangrove ecotone in Australasia and the Americas. In Coastal Wetlands (pp. 915–945). Elsevier.Google Scholar
  51. Salmo SGIII, Lovelock C, Duke NC. 2013. Vegetation and soil characteristics as indicators of restoration trajectories in restored mangroves. Hydrobiologia 720:1–18.CrossRefGoogle Scholar
  52. Schlacher TA, Connolly RM. 2014. Effects of acid treatment on carbon and nitrogen stable isotope ratios in ecological samples: a review and synthesis. Methods in Ecology and Evolution 5:541–50.CrossRefGoogle Scholar
  53. Serrano O, Lovelock C, Atwood T, Macreadie P, Canto R, Phinn S, Arias-Ortiz A, Bai L, Baldock J, Bedulli C, Carnell P, Connolly R, Donaldson P, Esteban A, Ewers CJ, Eyre BD, Hayes M, Horwitz P, Hutley L, Kavazos C, Kelleway JJ, Kendrick GA, Kilminster K, Lafratta A, Lee J, Lavery PS, Maher D, Marbà N, Masque P, Mateo MA, Mount R, Ralph PJ, Roelfsema C, Rozaimi M, Ruhon R, Salinas C, Samper-Villarreal J, Sanderman J, Sanders C, Santos I, Sharples C, Steven A, Trevathan-Tackett SM, Duarte CM, In Prep. The potential of Australian blue carbon ecosystems for climate change mitigation.Google Scholar
  54. Tamooh F, Huxham M, Karachi M, Mencuccini M, Kairo JG, Kirui B. 2008. Below-ground root yield and distribution in natural and replanted mangrove forests at Gazi bay, Kenya. Forest Ecology and Management 256:1290–7.CrossRefGoogle Scholar
  55. Thomas S. 2014. Blue carbon: knowledge gaps, critical issues, and novel approaches. Ecological Economics 107:22–38.CrossRefGoogle Scholar
  56. Walcker R, Gandois L, Proisy C, Corenblit D, Christophe M, Raghab L, Franc R. 2018. Control of “blue carbon” storage by mangrove ageing: evidence from a 66-year chronosequence in French Guiana. Global Change Biology 24:2325–38.CrossRefGoogle Scholar
  57. White NJ, Haigh ID, Church JA, Koen T, Watson CS, Pritchard TR, Watson PJ, Burgette RH, McInnes KL, You ZJ, Zhang X. 2014. Australian sea levels—trends, regional variability and influencing factors. Earth-Science Reviews 136:155–74.CrossRefGoogle Scholar
  58. Yando ES, Osland MJ, Willis JM, Day RH, Krauss KW, Hester MW. 2016. Salt marsh-mangrove ecotones: using structural gradients to investigate the effects of woody plant encroachment on plant–soil interactions and ecosystem carbon pools. Journal of Ecology 104:1020–31.CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • Karen Lamont
    • 1
  • Neil Saintilan
    • 1
    Email author
  • Jeffrey J. Kelleway
    • 2
  • Debashish Mazumder
    • 3
  • Atun Zawadzki
    • 3
  1. 1.Department of Environmental SciencesMacquarie UniversityNorth Ryde, SydneyAustralia
  2. 2.Department of Earth, Atmospheric and Life SciencesUniversity of WollongongWollongongAustralia
  3. 3.Australian Nuclear Science and Technology Organization (ANSTO)Lucas HeightsAustralia

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