Abstract
As global sea-levels rise, low-lying coastal lands are subject to shallow coastal flooding and saltwater intrusion, affecting the productivity of farmlands worldwide. Soil biogeochemistry can be dramatically altered as saltwater intrudes agricultural fields. We selected three farm fields in Somerset Co., Maryland affected by saltwater intrusion and established transects from the ditch bank to the center of the cropped field and collected soils (to ~ 140 cm) at five points along this transect. The three fields in this study have different soil types, are located along different tributaries in the county, and receive different fertilizer rates, yet they all showed similar biogeochemical responses to saltwater intrusion. We found an increase in electrical conductivity and concentrations of chloride, sulfate, and forms of phosphorus (P) from the center of the field (low) to the ditch banks (high). As inundation increased, the structure of iron (Fe) changed from crystalline to non-crystalline forms, possibly due to dissolution under saturated conditions. Near the edges of the fields, the formation of organometallic complexes was positively associated with increases in soil carbon and organic soil P concentrations. Compared to areas of the fields where crops were actively growing, soil P concentrations are 2–3 higher on field edges, suggesting that saltwater intrusion may be transporting P to the edges of agricultural fields. These field edges are frequently saturated, thus reduction of Fe could lead to P release into solution potentially harming water quality. As climate change pushes saltwater further inland, it is important to understand the biogeochemical consequences for ecosystems up- and downstream. Understanding the how fractions of P move and change across fields affected by saltwater intrusion will be crucial for planning current and future management of coastal agricultural lands.
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Anderson CJ, Lockaby BG (2011) Seasonal patterns of river connectivity and saltwater intrusion in tidal freshwater forested wetlands. River Res Appl 28:814–826. https://doi.org/10.1002/rra.1489
Arai Y, Livi KJT, Sparks DL (2005) Phosphate reactivity in long-term poultry litter-amended southern Delaware sandy soils. Soil Sci Soc Am J 69:616–629. https://doi.org/10.2136/sssaj2004.0218
Ardón M, Morse JL, Colman BP, Bernhardt ES (2013) Drought-induced saltwater incursion leads to increased wetland nitrogen export. Global Change Biol 19:2976–2985. https://doi.org/10.1111/gcb.12287
Ardón M, Helton AM, Scheuerell MD, Bernhardt ES (2017) Fertilizer legacies meet saltwater incursion: challenges and constraints for coastal plain wetland restoration. Elemental Sci Anthol. https://doi.org/10.1525/elementa.236
Bates D, Maechler M, Bolker B, Walker S (2013) lme4: linear mixed-effects models using Eigen and S4. https://cran.r-project.org/web/packages/lme4/lme4.pdf
Bhattachan A, Emanuel RE, Ardón M et al (2018) Evaluating the effects of land-use change and future climate change on vulnerability of coastal landscapes to saltwater intrusion. Elem Sci Anth 6:1–11. https://doi.org/10.1525/journal.elementa.316
Bischoff J, Werner H (1999) Salt salinity tolerance of common agricultural crops in South Dakota. South Dakota extension fact sheets. Paper 83. http://openprairie.sdstate.edu/extension_fact/83. Accessed 10 Nov 2018
Boesch DF (2006) Scientific requirements for ecosystem-based management in the restoration of Chesapeake Bay and Coastal Louisiana. Ecol Eng 26:6–26. https://doi.org/10.1016/j.ecoleng.2005.09.004
Boesch DF, Brinsfield RB, Magnien RE (2001) Chesapeake Bay eutrophication: scientific understanding, ecosystem restoration, and challenges for agriculture. J Environ Qual 30:303–320
Boesch DF, Atkinson LP, Bolocourt WC, et al (2013) Updating Maryland’s sea-level rise projections. Cambridge, MD. Report at: http://www.umces.edu/sites/default/files/pdfs/SeaLevelRiseProjections.pdf. Accessed 10 Oct 2018
Box G, Cox DR (1964) An analysis of transformations. J R Stat Soc B 26:211–252
Brand-Klibanski S, Litaor MI, Shenker M (2007) Overestimation of phosphorus adsorption capacity in reduced soils: an artifact of typical batch adsorption experiments. Soil Sci Soc Am J 71:1128–1129. https://doi.org/10.2136/sssaj2006.0222
Brewer SJ, Levine JM, Bertness MD (1998) Interactive effects of elevation and burial with wrack on plant community structure in some Rhode Island salt marshes. J Ecol 86:125–136
Bridgham SD, Megonigal JP, Keller JK et al (2006) The carbon balance of North American wetlands. Wetlands 26:889–916. https://doi.org/10.1672/0277-5212(2006)26%5B889:TCBONA%5D2.0.CO;2
Brinson MM, Christian RR, Blum LK (1995) Multiple states in the sea-level induced transition from terrestrial forest to estuary. Estuaries 18:648–659. https://doi.org/10.2307/1352383
Burgin AJ, Hamilton SK (2007) Have we overemphasized the role of denitrification in aquatic ecosystems? A review of nitrate removal pathways. Front Ecol Environ 5:89–96. https://doi.org/10.1890/1540-9295(2007)5%5b89:HWOTRO%5d2.0.CO;2
Caraco N, Cole J, Likens GE (1990) A comparison of phosphorus immobilization in sediments of freshwater and coastal marine systems. Biogeochemistry 9:277–290. https://doi.org/10.1007/BF00000602
Chambers RM, Odum WE (1990) Porewater oxidation, dissolved phosphate and the iron curtain. Biogeochemistry 10:37–52. https://doi.org/10.1007/BF00000891
Chambers LG, Osborne TZ, Reddy KR (2013) Effect of salinity-altering pulsing events on soil organic carbon loss along an intertidal wetland gradient: a laboratory experiment. Biogeochemistry 115:363–383. https://doi.org/10.1007/s10533-013-9841-5
Cross AF, Schlesinger WH (1995) A literature review and evaluation of the. Hedley fractionation: applications to the biogeochemical cycle of soil phosphorus in natural ecosystems. 64:197–214. https://doi.org/10.1016/0016-7061(94)00023-4
Darke AK, Walbridge MR (1994) Estimating non-crystalline and crystalline aluminum and iron by selective dissolution in a riparian forest soil 1. Commun Soil Sci Plant Anal 25:2089–2101
Darke AK, Walbridge MR (2000) Al and Fe Biogeochemistry in a floodplain forest: implications for P retention. Biogeochemistry 51:1–32
Day RH, Williams TM, Swarzenski CM (2007) Hydrology of Tidal Freshwater Forested Wetlands of the Southeastern United States. In: Connor WH, Doyle TW, Krauss KW (eds) Ecology of Tidal Freshwater Forested Wetlands of the Southeastern United States. Springer, Dordrecht, pp 29–63
EI-Swaify SA, Emerson WW (1975) Changes in the physical properties of soil clays due to precipitated aluminum and iron hydroxides: I. Swelling and Aggregate Stability After Drying. Soil Sci Soc Am Proc 39:1056–1063
El Rayah HME, Rowell DL (1973) The influence of iron and aluminum hydroxides on the swelling of Na-montmorillonite and the permeability of a Na-soil. J Soil Sci 24:137–144
Fisher TR, Jordan TE, Staver KW et al (2010) The Choptank Basin in Transition: Intensifying agriculture, slow urbanization, and estuarine eutrophication. In: Kennish MJ, Paerl HW (eds) Coastal lagoons: critical habitats of environmental change. CRC Press, Boca Raton, pp 135–165
Gee GW, Bauder JW (1986) Particle-size analysis. In: Klute A (ed) Methods of soil analysis. Part 1. Physical and mineralogical methods. Soil Sci Soc Am, Madison, pp 383–411
Gillman GP (1979) A proposed method for the measurement of exchange properties in highly weathered soils. Aust J Soil Res 17:129–139
Grubb KL, McGrath JM, Penn CJ, Bryant RB (2012) Effect of land application of phosphorus-saturated gypsum on soil phosphorus in a laboratory incubation. Appl Environ Soil Sci 2012:1–7. https://doi.org/10.1155/2012/506951
Guimarães DV, Gonzaga MIS, da Silva TO et al (2013) Soil organic matter pools and carbon fractions in soil under different land uses. Soil Tillage Res 126:177–182. https://doi.org/10.1016/j.still.2012.07.010
Hartzell JL, Jordan TE (2012) Shifts in the relative availability of phosphorus and nitrogen along estuarine salinity gradients. Biogeochemistry 107:489–500. https://doi.org/10.1007/s10533-010-9548-9
Hartzell JL, Jordan TE, Cornwell JC (2009) Phosphorus burial in sediments along the salinity gradient of the Patuxent River, a subestuary of the Chesapeake Bay (USA). Estuar Coasts 33:92–106. https://doi.org/10.1007/s12237-009-9232-2
Helton AM, Bernhardt ES, Fedders A (2014) Biogeochemical regime shifts in coastal landscapes: the contrasting effects of saltwater incursion and agricultural pollution on greenhouse gas emissions from a freshwater wetland. Biogeochemistry 120:133–147. https://doi.org/10.1007/s10533-014-9986-x
Herbert ER, Boon P, Burgin AJ et al (2015) A global perspective on wetland salinization: ecological consequences of a growing threat to freshwater wetlands. Ecosphere 6:1–43. https://doi.org/10.1890/es14-00534.1
Hoffmann CC, Kjaergaard C, Uusi-Kämppä J et al (2009) Phosphorus retention in riparian buffers: review of their efficiency. J Environ Qual 38:1942–1955. https://doi.org/10.2134/jeq2008.0087
Hogan DM, Jordan TE, Walbridge MR (2004) Phosphorus retention and soil organic carbon in restored and natural freshwater wetlands. Wetlands 24:573–585. https://doi.org/10.1672/0277-5212(2004)024%5b0573:prasoc%5d2.0.co;2
Hothorn T, Bretz F, Westfall P (2008) Simultaneous inference in general parametric models. Biom J 50:346–363. https://doi.org/10.1002/bimj.200810425
Intergovernmental Panel on Climate Change (IPCC) (2013) Summary for policymakers. In: 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, United Kingdom and New York, NY, USA. https://doi.org/10.1017/CBO9781107415324.004
Jordan TE, Cornwell JC, Boynton WR, Anderson JT (2008) Changes in phosphorus biogeochemistry along an estuarine salinity gradient: the iron conveyer belt. Limnol Oceanogr 53:172–184. https://doi.org/10.4319/lo.2008.53.1.0172
Jowsey PC (1965) An improved peat sampler. New Phytol 65:245–248. https://doi.org/10.1111/j.1469-8137.1966.tb06356.x
Kirwan ML, Kirwan JL, Copenheaver CA (2007) Dynamics of an estuarine forest and its response to rising sea level. J Coastal Res 232:457–463. https://doi.org/10.2112/04-0211.1
Kleinman PJA, Allen AL, Needelman BA et al (2007) Dynamics of phosphorus transfers from heavily manured Coastal Plain soils to drainage ditches. J Soil Water Conserv 62:225–235
Kleinman PJA, Church C, Saporito LS et al (2015a) Phosphorus leaching from agricultural soils of the Delmarva Peninsula, USA. J Environ Qual 44:524–534. https://doi.org/10.2134/jeq2014.07.0301
Kleinman PJA, Smith DR, Bolster CH, Easton ZM (2015b) Phosphorus fate, management, and modeling in artificially drained systems. J Environ Qual 44:460–467. https://doi.org/10.2134/jeq2015.02.0090
McDowell RW, Sharpley AN, Condron LM (2001) Processes controlling soil phosphorus release to runoff and implications for agricultural management. Nutr Cycl Agroecosyst 59:269–284
McGrath J, Coale F (2010) Soil fertility management: Agronomic crop nutrient recommendations based on soil tests and yield goals. University of Maryland Extension, College Park, MD
Megonigal JP, Neubauer SC (2009) Biogeochemistry of tidal freshwater wetlands. In: Perillo G, Wolanski E, Cahoon DR, Brinson MM (eds) Coastal wetlands an integrated ecosystem approach. Elsevier, New York, pp 535–562
Millar J (2003) Managing salt affected soil. In: South Dakota No-Till Association. http://www.sdnotill.com/Newsletters/2003_Salt_Soils.pdf. Accessed 9 July 2017
Mulvaney RL (1996) Nitrogen—inorganic forms. In: Sparks DL (ed) Methods of soil analysis Part. Soil Science Society of America, American Society of Agronomy, Madison, pp 1123–1184
Nair VD, Reddy KR (2013) Phosphorus sorption and desorption in wetland soils. In: DeLaune RD, Richardson CJ, Megonigal JP (eds) Methods in biogeochemistry of wetlands. Soil Science Society of America, Madison, pp 667–681
Neubauer SC, Craft CB (2009) Global change and tidal freshwater wetlands: scenarios and impacts. In: Barendregt A, Wingham DF, Baldwin AH (eds) Tidal freshwater wetlands. Backhuys Publishers, Leiden, pp 253–266
Neubauer SC, Franklin RB, Berrier DJ (2013) Saltwater intrusion into tidal freshwater marshes alters the biogeochemical processing of organic carbon. Biogeosciences 10:8171–8183. https://doi.org/10.5194/bg-10-8171-2013
Noe GB, Krauss KW, Lockaby BG et al (2013) The effect of increasing salinity and forest mortality on soil nitrogen and phosphorus mineralization in tidal freshwater forested wetlands. Biogeochemistry 114:225–244. https://doi.org/10.1007/s10533-012-9805-1
Okabe S, Ito T, Satoh H (2003) Sulfate-reducing bacterial community structure and their contribution to carbon mineralization in a wastewater biofilm growing under microaerophilic conditions. Appl Microbiol Biotechnol 63:322–334. https://doi.org/10.1007/s00253-003-1395-3
Pant HK, Reddy KR (2001) Phosphorus sorption characteristics of estuarine sediments under different redox conditions. J Environ Qual 30:1474–1477. https://doi.org/10.2134/jeq2001.3041474x
Perez MR (2015) Regulating farmer nutrient management: a three-state case study on the Delmarva Peninsula. J Environ Qual 44:402–413. https://doi.org/10.2134/jeq2014.07.0304
Ponnamperuma FN (1972) The chemistry of submerged soils. Adv Agron 24:29–96
Price RM, Swart PK, Fourqurean JW (2006) Coastal groundwater discharge—an additional source of phosphorus for the oligotrophic wetlands of the Everglades. Hydrobiologia 569:23–36. https://doi.org/10.1007/s10750-006-0120-5
Priyanka K, Anshumali A (2016) Soil carbon: an overview on soil carbon function and its fractionation. Curr World Environ 11:178–185. https://doi.org/10.12944/CWE.11.1.22
Rapin A, Grybos M, Rabiet M et al (2018) Phosphorus mobility in dam reservoir affected by redox oscillations: an experimental study. J Environ Sci 77:1–14. https://doi.org/10.1016/j.jes.2018.07.016
Reddy KR, Wetzel RG, Kadlec RH (2005) Biogeochemistry of phosphorus in wetlands. In: Sims JT, Sharpley AN (eds) Phosphorus: agriculture and the environment. Soil Science Society of America, Madison, pp 263–316
Rengasamy P (2010) Soil processes affecting crop production in salt-affected soils. Funct Plant Biol 37:613–618. https://doi.org/10.1071/FP09249
Roden EE, Edmonds JW (1997) Phosphate mobilization in iron-rich anaerobic sediments: microbial Fe(III) oxide reduction versus iron-sulfide formation. Arch Hydrobiol 139:347–378
Roman CT, Niering WA, Warren RS (1984) Salt marsh vegetation change in response to tidal restriction. Environ Manag 8:141–149. https://doi.org/10.1007/BF01866935
Rozan TF, Taillefert M, Trouwborst RE et al (2002) Iron-sulfur-phosphorus cycling in the sediments of a shallow coastal bay: implications for sediment nutrient release and benthic macroalgal blooms. Limnol Oceanogr 47:1346–1354. https://doi.org/10.4319/lo.2002.47.5.1346
Ruttenberg KC (1992) Development of a sequential extraction method for different forms of phosphorus in marine sediments. Limnol Oceanogr 37:1460–1482. https://doi.org/10.4319/lo.1992.37.7.1460
Sharpley A, Jarvie HP, Buda A et al (2013) Phosphorus legacy: overcoming the effects of past management practices to mitigate future water quality impairment. J Environ Qual 42:1308–1319. https://doi.org/10.2134/jeq2013.03.0098
Shober AL, Sims JT, Walls JL (2012) Phosphorus removal by Delaware crops. University of Delaware Extension, Newark. Report at: http://extension.udel.edu/factsheets/phosphorus-removal-by-delaware-crops/. Accessed 10 Nov 2018
Sims JT, Maguire RO, Leytem AB et al (2002) Evaluation of Mehlich 3 as an agri-environmental soil phosphorus test for the Mid-Atlantic United States of America. Soil Sci Soc Am J 66:2016–2017. https://doi.org/10.2136/sssaj2002.2016
Smith JAM (2013) The role of Phragmites australis in mediating inland salt marsh migration in a mid-Atlantic estuary. PLoS ONE 8:e65091–e65099. https://doi.org/10.1371/journal.pone.0065091
Sodano M, Lerda C, Nisticò R, Martin M (2017) Dissolved organic carbon retention by coprecipitation during the oxidation of ferrous iron. Geoderma 307:19–29. https://doi.org/10.1016/j.geoderma.2017.07.022
Soil Survey Staff, Natural Resources Conservation Service, United States Department of Agriculture. Web Soil Survey. Database at: https://websoilsurvey.sc.egov.usda.gov/. Accessed 27 Dec 2018
Southeastern Regional Climate Center (SERCC) (2017) Historical Climate Summaries for Maryland. Database at: http://www.sercc.com/climateinfo/historical/historical_md.html. Accessed 27 Dec 2018
Tanji KK, Kielen NC (2002) Agricultural drainage water management in arid and semi-arid areas. Food and Agriculture Organization of the United Nations (FAO), Rome
Tiessen H, Moir JL (1983) Characterization of available P by sequential extraction. In: Carter MR (ed) Soil sampling and methods of analysis. Lewis Publishers, Ann Arbor, pp 75–86
United States Department of Agriculture (USDA) (2012) Census of Agriculture County Profile - Somserset Country, Maryland. Database at: https://www.agcensus.usda.gov/Publications/2012/Online_Resources/County_Profiles/Maryland/cp24039.pdf. Accessed 28 June 2018
United States Global Change Research Program (USGCRP) (2017) Climate Science Special Report: Fourth National Climate Assessment, Volume I. U.S. Global Change Research Program, Washington, DC, USA, p 470. https://doi.org/10.7930/J0J964J6
Upreti K, Joshi SR, McGrath J, Jaisi DP (2015) Factors controlling phosphorus mobilization in a Coastal Plain tributary to the Chesapeake Bay. Soil Sci Soc Am J 79:826–837. https://doi.org/10.2136/sssaj2015.03.0117
Vadas PA, Kleinman PJA, Sharpley AN, Turner BL (2005) Relating soil phosphorus to dissolved phosphorus in runoff: a single extraction coefficient for water quality modeling. J Environ Qual 34:572–580. https://doi.org/10.2134/jeq2005.0572
Wager BI, Stewart J, Moir JO (1986) Changes with time in the form and availability of residual fertilizer phosphorus on Cheruozemic soils. Can J Soil Sci 66:105–119
Wahid PA, Kamalam NV (1993) Reductive dissolution of crystalline and amorphous Fe(III) oxides by microorganisms in submerged soil. Biol Fertil Soils 15:144–148. https://doi.org/10.1007/BF00336433
Waldrip HM, Pagliari PH, He Z et al (2015) Legacy phosphorus in calcareous soils: effects of long-term poultry litter application. Soil Sci Soc Am J 79:1601. https://doi.org/10.2136/sssaj2015.03.0090
White E Jr, Kaplan D (2016) Restore or retreat? Saltwater intrusion and water management in coastal wetlands. Ecosyst Health Sustain 3:e01258–e01258. https://doi.org/10.1002/ehs2.1258
Williams AA, Lauer NT, Hackney CT (2014) Soil phosphorus dynamics and saltwater intrusion in a Florida estuary. Wetlands 34:535–544. https://doi.org/10.1007/s13157-014-0520-7
Zhou M, Butterbach-Bahl K, Vereecken H, Brüggemann N (2016) A meta-analysis of soil salinization effects on nitrogen pools, cycles and fluxes in coastal ecosystems. Global Change Biol 23:1338–1352. https://doi.org/10.1111/gcb.13430
Acknowledgements
This work was supported by several funding sources: a Seed Grant through the University of Maryland National Science Foundation-ADVANCE Institutional Transformation grant (Grant No. HRD-1008117); a USDA National Institute for Food and Agriculture (NIFA) Integrated Agriculture and Natural Resources Extension and Research Program Grant administered through the University of Maryland (Project No. MD-PSLA-18496/Project Accession No. 1016911); a grant from the USDA NIFA Resilient Agroecosystems in a Changing Climate Challenge Area (Grant No. 12451226/Project Accesion No. 1015143); and a Maryland Sea Grant Coastal Resilience and Sustainability Fellowship (Grant No. 20171-002). We would like to thank all of the interns in the Agroecology lab who worked tirelessly on this project. Finally, we are indebted to the farmers of Somerset County, who have been so gracious with their time and land.
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Tully, K.L., Weissman, D., Wyner, W.J. et al. Soils in transition: saltwater intrusion alters soil chemistry in agricultural fields. Biogeochemistry 142, 339–356 (2019). https://doi.org/10.1007/s10533-019-00538-9
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DOI: https://doi.org/10.1007/s10533-019-00538-9