Substantial uptake of atmospheric and groundwater nitrogen by dune slacks under different water table regimes

  • J. Rhymes
  • H. Wallace
  • S. Y. Tang
  • T. Jones
  • N. Fenner
  • L. Jones
Article

Abstract

Dune slacks are biodiverse seasonal wetlands which experience considerable fluctuations in water table depths. They are subject to multiple threats such as eutrophication and climate change, and the interactions of both of these pressures are poorly understood. In this study we measured the impact of groundwater nitrogen contamination, as ammonium nitrate (0, 0.2, 10 mg/L of DIN, dissolved inorganic nitrogen), lowered water table depth (lowered by 10 cm) and the interactions of these factors, in a mesocosm study. We measured gross nutrient budgets, evapotranspiration rates, the growth of individual species and plant tissue chemistry. This study found that nitrogen uptake within dune slack habitats is substantial. Atmospheric inputs of 23 kg N ha−1 yr.−1 were retained by the mesocosms, with no increase of nutrient levels in the groundwater, i.e. there was no leaching of excess N. When N was added to the groundwater (in addition to atmospheric N), total uptake was equivalent to 116 kg N ha−1 yr.−1, at a groundwater DIN concentration of 10 mg/L. This resulted in increased plant tissue N concentrations showing uptake by the vegetation. The effect of lowering water tables did not influence N uptake, but did alter vegetation composition. This suggests that groundwater can be a substantial input of N to these habitats and should be considered in combination with atmospheric inputs, when assessing potential ecosystem damage.

Keywords

Dune slack Ecology Soil Groundwater Eutrophication 

References

  1. Achermann B, Bobbink R (2003) Empirical critical loads for nitrogen. Environmental documentation 164:327Google Scholar
  2. Adema EB, Van de Koppel J, Meijer HA, Grootjans AP (2005) Enhanced nitrogen loss may explain alternative stable states in dune slack succession. Oikos 109(2):374–386.  https://doi.org/10.1111/j.0030-1299.2005.13339.x CrossRefGoogle Scholar
  3. Berendse F, Lammerts E, Olff H (1998) Soil organic matter accumulation and its implications for nitrogen mineralization and plant species composition during succession in coastal dune slacks. Plant Ecol 137(1):71–78.  https://doi.org/10.1023/A:1008051931963 CrossRefGoogle Scholar
  4. Bettez ND, Groffman PM (2013) Nitrogen deposition in and near an urban ecosystem. Environ Sci Technol 47:6047–6051CrossRefGoogle Scholar
  5. Bobbink R, Hettelingh J-P (2010) Review and revision of empirical critical loads and dose-response relationships. Proceedings of an expert workshop, Noordwijkerhout, pp 23–25Google Scholar
  6. Clarke D, Ayutthaya SSN (2010) Predicted effects of climate change, vegetation and tree cover on dune slack habitats at Ainsdale on the Sefton Coast, UK. J Coast Conserv 14(2):115–125.  https://doi.org/10.1007/s11852-009-0066-7 CrossRefGoogle Scholar
  7. Curreli A, Wallace H, Freeman C, Hollingham M, Stratford C, Johnson H, Jones L (2013) Eco-hydrological requirements of dune slack vegetation and the implications of climate change. Sci Total Environ 443:910–919.  https://doi.org/10.1016/j.scitotenv.2012.11.035 CrossRefGoogle Scholar
  8. Field CD, Dise NB, Payne RJ, Britton AJ, Emmett BA, Helliwell RC, Hughes S, Jones L, Lees S, Leake JR, Leith ID (2014) The role of nitrogen deposition in widespread plant community change across semi-natural habitats. Ecosystems 17(5):864–877CrossRefGoogle Scholar
  9. Grootjans A, Adema E, Bekker R, Lammerts E (2004) Why coastal dune slacks sustain a high biodiversity, Coastal Dunes. Springer, Berlin, pp 85–101Google Scholar
  10. Hope-Simpson JF, Yemm EW (1979) Braunton burrows: developing vegetation in dune slacks, 1948–1977. Ecological processes in coastal environments. Blackwell, London, pp 115–127Google Scholar
  11. Jones MLM, Wallace HL, Norris D, Brittain SA, Haria S, Jones RE, Rhind PM, Reynolds BR, Emmett BA (2004) Changes in vegetation and soil characteristics in coastal sand dunes along a gradient of atmospheric nitrogen deposition. Plant Biol 6(5):598–605.  https://doi.org/10.1055/s-2004-821004 CrossRefGoogle Scholar
  12. Jones M, Reynolds B, Brittain S, Norris D, Rhind P, Jones R (2006) Complex hydrological controls on wet dune slacks: the importance of local variability. Sci Total Environ 372(1):266–277.  https://doi.org/10.1016/j.scitotenv.2006.08.040 CrossRefGoogle Scholar
  13. Jones L, Nizam M, Reynolds B, Bareham S, Oxley E (2013) Upwind impacts of ammonia from an intensive poultry unit. Environ Pollut 180:221–228.  https://doi.org/10.1016/j.envpol.2013.05.012 CrossRefGoogle Scholar
  14. Meltzer J, Van Dijk H (1986) The effects of dissolved macro-nutrients on the herbaceous vegetation around dune pools. Vegetatio 65(1):53–61.  https://doi.org/10.1007/BF00032127 CrossRefGoogle Scholar
  15. Nilsson J (1988) Critical loads for sulphur and nitrogen, air pollution and ecosystems. Springer, New York, pp 85–91CrossRefGoogle Scholar
  16. Provoost S, Jones MLM, Edmondson SE (2011) Changes in landscape and vegetation of coastal dunes in northwest Europe: a review. J Coast Conserv 15(1):207–226.  https://doi.org/10.1007/s11852-009-0068-5 CrossRefGoogle Scholar
  17. Ranwell D (1959) Newborough Warren, Anglesey: I. The dune system and dune slack habitat. J Ecol 571–601.  https://doi.org/10.2307/2257291
  18. Rhymes J, Wallace H, Fenner N, Jones L (2014) Evidence for sensitivity of dune wetlands to groundwater nutrients. Sci Total Environ 490C:106–113CrossRefGoogle Scholar
  19. Rhymes J, Jones L, Lapworth DJ, White D, Fenner N, McDonald JE, Perkins TL (2015) Using chemical, microbial and fluorescence techniques to understand contaminant sources and pathways to wetlands in a conservation site. Sci Total Environ 511:703–710.  https://doi.org/10.1016/j.scitotenv.2014.12.085 CrossRefGoogle Scholar
  20. Rhymes J, Jones L, Wallace H, Jones T, Dunn C, Fenner N (2016) Small changes in water levels and groundwater nutrients alter nitrogen and carbon processing in dune slack soils. Soil Biol Biochem 99:28–35.  https://doi.org/10.1016/j.soilbio.2016.04.018 CrossRefGoogle Scholar
  21. Rodwell J, Dring J, Averis A, Proctor M, Malloch A, Schaminée J, Dargie T (2000) Review of coverage of the national vegetation classification. Report-joint nature conservation committeeGoogle Scholar
  22. Stratford C, Ratcliffe J, Hughes AG, Roberts J, Robins NS (2007) Complex interaction between shallow groundwater and changing woodland, surface water, grazing and other influences in partly wooded duneland in Anglesey, Wales. Proceedings of the CDXXXV congress International association of hydrogeologists: groundwater and ecosystems. International association of Hydrogeologists, pp 1-10Google Scholar
  23. Stratford CJ, Robins NS, Clarke D, Jones L, Weaver G (2013) An ecohydrological review of dune slacks on the west coast of England and Wales. Ecohydrology 6(1):162–171.  https://doi.org/10.1002/eco.1355 CrossRefGoogle Scholar
  24. Tang Y, Cape J, Sutton M (2001) Development and types of passive samplers for monitoring atmospheric NO2 and NH3 concentrations. Sci World J 1:513–529.  https://doi.org/10.1100/tsw.2001.82 CrossRefGoogle Scholar
  25. van der Laan D (1979) Spatial and temporal variation in the vegetation of dune slacks in relation to the ground water regime. Vegetatio 39(1):43–51.  https://doi.org/10.1007/BF00055327 CrossRefGoogle Scholar
  26. Willis A, Folkes B, Hope-Simpson J, Yemm E (1959) Braunton burrows: the dune system and its vegetation. J Ecol 47(2):249–288.  https://doi.org/10.2307/2257366 CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media B.V., part of Springer Nature 2018

Authors and Affiliations

  1. 1.University of PlymouthPlymouthUK
  2. 2.Bangor UniversityBangorUK
  3. 3.Centre for Ecology & HydrologyBangorUK
  4. 4.Ecological Surveys (Bangor)BangorUK
  5. 5.Centre for Ecology & HydrologyEdinburghUK

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