Soil greenhouse gas emissions and carbon budgeting in a short-hydroperiod floodplain wetland

Journal of Geophysical Research: Biogeosciences

Volumn 120, Issue 1, 2015, Pages 77-95

  Batson, Jackie ^a   Noe, Gregory B ^a   Hupp, Cliff R ^a   Krauss, Ken W ^b   Rybicki, Nancy B ^a   Schenk, Edward R ^a  

^a U S GEOLOGICAL SURVEY   (United States)

^b NATIONAL WETLANDS RESEARCH CENTER   (United States)

Author keywords

carbon; floodplain; geomorphology; greenhouse gases; hydrologic connectivity; riparian

Indexed keywords

CARBON BALANCE; CARBON BUDGET; CARBON SEQUESTRATION; CONNECTIVITY; FLOODPLAIN; FLUX MEASUREMENT; GEOMORPHOLOGY; GREENHOUSE GAS; HYDROPERIOD; OXYGEN; PIEDMONT; SEDIMENTATION RATE; SOIL EMISSION; SOIL RESPIRATION; SPATIAL VARIATION; URBAN REGION; WETLAND;

EID: 85027921031     PISSN: 21698953     EISSN: 21698961     Source Type: Journal    
DOI: 10.1002/2014JG002817     Document Type: Article

References (107)

1. Altor, A. E., and, W. J. Mitsch, (2006), Methane flux from created riparian marshes: Relationship to intermittent versus continuous inundation and emergent macrophytes, Ecol. Eng., 28, 224-234, doi: 10.1016/j.ecoleng.2006.06.006.
2. Altor, A. E., and, W. J. Mitsch, (2008), Methane and carbon dioxide dynamics in wetland mesocosms: Effects of hydrology and soils, Ecol. Appl., 18, 1307-1320, doi: 10.1890/07-0009.1.
3. Amoros, C., A. L. Roux, J. L. Reygrobellet, J. P. Bravard, and, G. Pautou, (1987), A method for applied ecological studies of fluvial hydrosystems, Reg. Rivers Res. Manage., 1 (1), 17-36, doi: 10.1002/rrr.3450010104.
4. Bartlett, K. B., P. M. Crill, J. A. Bonassi, J. E. Richey, and, R. C. Harriss, (1990), Methane flux from the Amazon River floodplain: Emissions during rising water, J. Geophys. Res. (1984-2012), 95 (D10), 16,773-16,788, doi: 10.1029/JD095iD10p16773.
5. Battin, T. J., L. A. Kaplan, S. Findlay, C. S. Hopkinson, E. Marti, A. I. Packman, J. D. Newbold, and, F. Sabater, (2008), Biophysical controls on organic carbon fluxes in fluvial networks, Nat. Geosci., 1, 95-100, doi: 10.1038/ngeo101.
6. Battin, T. J., S. Luyssaert, L. A. Kaplan, A. K. Aufdenkampe, A. Richter, and, L. J. Tranvik, (2009), The boundless carbon cycle, Nat. Geosci., 2, 598-600, doi: 10.1038/ngeo618.
7. Bayley, P. B., (1995), Understanding large river: Floodplain ecosystems, BioScience, 45 (3), 153-158, doi: 10.2307/1312554.
8. Bond-Lamberty, B., and, A. Thomson, (2010), A global database of soil respiration data, Biogeosciences, 7, 1915-1926.
9. Boon, P. I., and, K. Lee, (1997), Methane oxidation in sediments of a floodplain wetland in south-eastern Australia, Lett. Appl. Microbiol., 25 (2), 138-142, doi: 10.1046/j.1472-765X.1997.00189.x.
10. Boon, P. I., A. Mitchell, and, K. Lee, (1997), Effects of wetting and drying on methane emissions from ephemeral floodplain wetlands in south-eastern Australia, Hydrobiologia, 357 (1-3), 73-87, doi: 10.1023/A:1003126601466.
11. Bridgham, S. D., and, C. J. Richardson, (1992), Mechanisms controlling soil respiration (CO2 and CH4) in southern peatlands, Soil Biol. Biochem., 24 (11), 1089-1099, doi: 10.1016/0038-0717(92)90058-6.
12. Bridgham, S. D., K. Updegraff, and, J. Pastor, (1998), Carbon, nitrogen, and phosphorus mineralization in northern wetlands, Ecology, 79 (5), 1545-1561, doi: 10.1890/0012-9658(1998)079[1545:CNAPMI]2.0.CO;2.
13. Bridgham, S. D., J. P. Megonigal, J. K. Keller, N. B. Bliss, and, C. Trettin, (2006), The carbon balance of North American wetlands, Wetlands, 26, 889-916, doi: 10.1672/0277-5212(2006)26[889:TCBONA]2.0.CO;2.
14. Brinson, M. M., A. E. Lugo, and, S. Brown, (1981), Primary productivity, decomposition and consumer activity in freshwater wetlands, Annu. Rev. Ecol. Syst., 12 (1), 123-161, doi: 10.1146/annurev.es.12.110181.001011.
15. Burke, M. K., B. G. Lockaby, and, W. H. Conner, (1999), Aboveground production and nutrient circulation along a flooding gradient in a South Carolina Coastal Plain forest, Can. J. For. Res., 29 (9), 1402-1418, doi: 10.1139/x99-111.
16. Casper, P., S. C. Maberly, G. H. Hall, and, B. J. Finlay, (2000), Fluxes of methane and carbon dioxide from a small productive lake to the atmosphere, Biogeochemistry, 49 (1), 1-19, doi: 10.1023/A:1006269900174.
17. Clawson, R. G., B. G. Lockaby, and, B. Rummer, (2001), Changes in production and nutrient cycling across a wetness gradient within a floodplain forest, Ecosystems, 4 (2), 126-138, doi: 10.1007/s100210000063.
18. Couwenberg, J., R. Dommain, and, H. Joosten, (2010), Greenhouse gas fluxes from tropical peatlands in south-east Asia, Global Change Biol., 16, 1715-1732, doi: 10.1111/j.1365-2486.2009.02016.x.
19. Craft, C. B., and, W. P. Casey, (2000), Sediment and nutrient accumulation in floodplain and depressional freshwater wetlands of Georgia, USA, Wetlands, 20 (2), 323-332, doi: 10.1672/0277-5212(2000)020[0323:SANAIF]2.0.CO;2.
20. Crill, P. M., (1991), Seasonal patterns of methane uptake and carbon dioxide release by a temperate woodland soil, Global Biogeochem. Cycles, 5 (4), 319-334, doi: 10.1029/91GB02466.
21. Davidson, E. A., M. Keller, H. E. Erickson, L. V. Verchot, and, E. Veldkamp, (2000), Testing a conceptual model of soil emissions of nitrous and nitric oxides: Using two functions based on soil nitrogen availability and soil water content, the hole-in-the-pipe model characterizes a large fraction of the observed variation of nitric oxide and nitrous oxide emissions from soils, BioScience, 50 (8), 667-680, doi: 10.1641/0006-3568(2000)050[0667:TACMOS]2.0.C.
22. DeBusk, W. F., and, K. R. Reddy, (2003), Nutrient and hydrology effects on soil respiration in a northern Everglades marsh, J. Environ. Qual., 32 (2), 702-710, doi: 10.2134/jeq2003.7020.
23. Edwards, N. T., and, W. F. Harris, (1977), Carbon cycling in a mixed deciduous forest floor, Ecology, 58 (2), 431-437.
24. Forster, P., et al. (2007), Changes in atmospheric constituents and in radiative forcing, in Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, edited by, S. Solomon, et al., Cambridge Univ. Press, Cambridge, and New York.
25. Freeman, C., M. A. Lock, S. Hughes, B. Reynolds, and, J. A. Hudson, (1997), Nitrous oxide emissions and the use of wetlands for water quality amelioration, Environ. Sci. Technol., 31 (8), 2438-2440, doi: 10.1021/es9604673.
26. Fromin, N., G. Pinay, B. Montuelle, D. Landais, J. M. Ourcival, R. Joffre, and, R. Lensi, (2010), Impact of seasonal sediment desiccation and rewetting on microbial processes involved in greenhouse gas emissions, Ecohydrology, 3, 339-348, doi: 10.1002/eco.115.
27. Gallardo, B., C. Español, and, F. A. Comin, (2012), Aquatic metabolism short-term response to the flood pulse in a Mediterranean floodplain, Hydrobiologia, 693, 251-264, doi: 10.1007/s10750-012-1126-9.
28. Giblin, A. E., K. J. Nadelhoffer, G. R. Shaver, J. A. Laundre, and, A. J. McKerrow, (1991), Biogeochemical diversity along a riverside toposequence in arctic Alaska, Ecol. Monogr., 61 (4), 415-435, doi: 10.2307/2937049.
29. Gleason, R. A., B. A. Tangen, B. A. Browne, and, N. H. Euliss Jr., (2009), Greenhouse gas flux from cropland and restored wetlands in the Prairie Pothole Region, Soil Biol. Biochem., 41, 2501-2507, doi: 10.1016/j.soilbio.2009.09.008.
30. Goulden, M. L., S. D. Miller, H. R. Da Rocha, M. C. Menton, H. C. de Freitas, A. M. E. Silva Figueira, and, C. A. D. de Sousa, (2004), Diel and seasonal patterns of tropical forest CO2 exchange, Ecol. Appl., 14, 42-54, doi: 10.1890/02-6008.
31. Groffman, P. M., and, J. M. Tiedje, (1991), Relationships between denitrification, CO2 production and air-filled porosity in soils of different texture and drainage, Soil Biol. Biochem., 23 (3), 299-302, doi: 10.1016/0038-0717(91)90067-T.
32. Groffman, P. M., D. J. Bain, L. E. Band, K. T. Belt, G. S. Brush, J. M. Grove, R. V. Pouyat, I. C. Yesilonis, and, W. C. Zipperer, (2003), Down by the riverside: Urban riparian ecology, Front. Ecol. Environ., 1 (6), 315-321, doi: 10.1890/1540-9295(2003)001[0315:DBTRUR]2.0.CO;2.
33. Groffman, P. M., J. P. Hardy, M. C. Fisk, T. J. Fahey, and, C. T. Driscoll, (2009), Climate variation and soil carbon and nitrogen cycling processes in a northern hardwood forest, Ecosystems, 12, 927-943, doi: 10.1007/s10021-009-9268-y.
34. Gulledge, J., and, J. P. Schimel, (2000), Controls on soil carbon dioxide and methane fluxes in a variety of taiga forest stands in interior Alaska, Ecosystems, 3 (3), 269-282, doi: 10.1007/s100210000025.
35. Gupta, S. R., and, J. S. Singh, (1981), Soil respiration in a tropical grassland, Soil Biol. Biochem., 13 (4), 261-268, doi: 10.1016/0038-0717(81)90060-2.
36. Harriss, R. C., D. I. Sebacher, and, F. P. Day, (1982), Methane flux in the great dismal swamp, Nature, 297 (5868), 673-674, doi: 10.1038/297673a0.
37. Healy, R. W., R. G. Striegl, T. F. Russell, G. L. Hutchinson, and, G. P. Livingston, (1996), Numerical evaluation of static-chamber measurements of soil-atmosphere gas exchange: Identification of physical processes, Soil Sci. Soc. Am. J., 60 (3), 740-747, doi: 10.2136/sssaj1996.03615995006000030009x.
38. Hedges, J. I., and, J. H. Stern, (1984), Carbon and nitrogen determinations of carbonate-containing solids, Limnol. Oceanogr., 29 (3), 657-663.
39. Heinemeyer, A., C. Di Bene, A. R. Lloyd, D. Tortorella, R. Baxter, B. Huntley, A. Gelsomino, and, P. Ineson, (2011), Soil respiration: Implications of the plant-soil continuum and respiration chamber collar-insertion depth on measurement and modelling of soil CO2 efflux rates in three ecosystems, Eur. J. Soil Sci., 62, 82-94, doi: 10.1111/j.1365-2389.2010.01331.x.
40. Hopkinson, C. S., (1992), A comparison of ecosystem dynamics in freshwater wetlands, Estuaries, 15 (4), 549-562, doi: 10.2307/1352397.
41. Hupp, C. R., (1986), The headward extent of fluvial landforms and associated vegetation on Massanutten Mountain, Virginia, Earth Surf. Processes Landforms, 11 (5), 545-555, doi: 10.1002/esp.3290110509.
42. Hupp, C. R., (2000), Hydrology, geomorphology and vegetation of Coastal Plain rivers in the south-eastern USA, Hydrol. Processes, 14 (16-17), 2991-3010.
43. Hupp, C. R., C. R. Demas, D. E. Kroes, R. H. Day, and, T. W. Doyle, (2008), Recent sedimentation patterns within the central Atchafalaya Basin, Louisiana, Wetlands, 28, 125-140, doi: 10.1672/06-132.1.
44. Hupp, C. R., A. R. Pierce, and, G. B. Noe, (2009), Floodplain geomorphic processes and environmental impacts of human alteration along coastal plain rivers, USA, Wetlands, 29, 413-429, doi: 10.1672/08-169.1.
45. Hupp, C. R., G. B. Noe, E. R. Schenk, and, A. J. Bentham, (2013), Recent and historic sediment dynamics along Difficult Run, a suburban Virginia Piedmont stream, Geomorphology, 180-181, 156-169, doi: 10.1016/j.geomorph.2012.10.007.
46. Jaatinen, K., R. Laiho, A. Vuorenmaa, U. Del Castillo, K. Minkkinen, T. Pennanen, T. Penttilä, and, H. Fritze, (2008), Responses of aerobic microbial communities and soil respiration to water-level drawdown in a northern boreal fen, Environ. Microbiol., 10, 339-353, doi: 10.1111/j.1462-2920.2007.01455.x.
47. Johnson, M. S., J. Lehmann, S. J. Riha, A. V. Krusche, J. E. Richey, J. P. H. B. Ometto, and, E. G. Couto, (2008), CO2 efflux from Amazonian headwater streams represents a significant fate for deep soil respiration, Geophys. Res. Lett., 35, L17401, doi: 10.1029/2008GL034619.
48. Jolley, R. L., B. G. Lockaby, and, R. M. Governo, (2010), Biogeochemical influences associated with sedimentation in riparian forests of the Southeastern Coastal Plain, Soil Sci. Soc. Am. J., 74, 326-336, doi: 10.2136/sssaj2009.0041.
49. Junk, W. J., P. B. Bayley, and, R. E. Sparks, (1989), The flood pulse concept in river-floodplain systems, Can. Spec. Publ. Fish. Aquat. Sci., 106 (1), 110-127.
50. Koh, H.-S., C. A. Ochs, and, K. Yu, (2009), Hydrologic gradient and vegetation controls on CH4 and CO2 fluxes in a spring-fed forested wetland, Hydrobiologia, 630, 271-286, doi: 10.1007/s10750-009-9821-x.
51. Krauss, K. W., and, J. L. Whitbeck, (2012), Soil greenhouse gas fluxes during wetland forest retreat along the lower Savannah River, Georgia (USA), Wetlands, 32, 73-81, doi: 10.1007/s13157-011-0246-8.
52. Krauss, K. W., J. L. Whitbeck, and, R. J. Howard, (2012), On the relative roles of hydrology, salinity, temperature, and root productivity in controlling soil respiration from coastal swamps (freshwater), Plant Soil, 358, 265-274, doi: 10.1007/s11104-012-1182-y.
53. Le Mer, J., and, P. Roger, (2001), Production, oxidation, emission and consumption of methane by soils: A review, Eur. J. Soil Biol., 37 (1), 25-50, doi: 10.1016/S1164-5563(01)01067-6.
54. Lockaby, B. G., and, M. R. Walbridge, (1998), Biogeochemistry, in Southern Forested Wetlands: Ecology and Management, edited by, M. G. Messina, and, W. H. Conner, pp. 149-172, CRC Press, Boca Raton, Fla.
55. McClain, M. E., E. W. Boyer, C. L. Dent, S. E. Gergel, N. B. Grimm, P. M. Groffman, S. C. Hart, J. W. Harvey, C. A. Johnston, and, E. Mayorga, (2003), Biogeochemical hot spots and hot moments at the interface of terrestrial and aquatic ecosystems, Ecosystems, 6 (4), 301-312, doi: 10.1007/s10021-003-0161-9.
56. Megonigal, J. P., and, W. H. Schlesinger, (1997), Enhanced CH4 emission from a wetland soil exposed to elevated CO2, Biogeochemistry, 37 (1), 77-88, doi: 10.1023/A:1005738102545.
57. Miao, G., A. Noormets, J. C. Domec, C. C. Trettin, S. G. McNulty, G. Sun, and, J. S. King, (2013), The effect of water table fluctuation on soil respiration in a lower coastal plain forested wetland in the southeastern US, J. Geophys. Res. Biogeosci., 118, 1-15, doi: 10.1002/2013JG002354.
58. Mitra, S., R. Wassmann, and, P. L. G. Vlek, (2005), An appraisal of global wetland area and its organic carbon stock, Curr. Sci., 88, 25.
59. Mitsch, W. J., and, J. G. Gosselink, (2007), Wetlands, John Wiley, Hoboken, N. J.
60. Moore, T. R., and, M. Dalva, (1997), Methane and carbon dioxide exchange potentials of peat soils in aerobic and anaerobic laboratory incubations, Soil Biol. Biochem., 29 (8), 1157-1164, doi: 10.1016/S0038-0717(97)00037-0.
61. Moore, T. R., and, R. Knowles, (1989), The influence of water table levels on methane and carbon dioxide emissions from peatland soils, Can. J. Soil Sci., 69 (1), 33-38, doi: 10.4141/cjss89-004.
62. Moosavi, S. C., and, P. M. Crill, (1997), Controls on CH4 and CO2 emissions along two moisture gradients in the Canadian boreal zone, J Geophys Res (1984-2012), 102 (D24), 29,261-29,277, doi: 10.1029/96JD03873.
63. Morse, J. L., M. Ardõn, and, E. S. Bernhardt, (2012), Greenhouse gas fluxes in southeastern US coastal plain wetlands under contrasting land uses, Ecol. Appl., 22, 264-280, doi: 10.1890/11-0527.1.
64. Nahlik, A. M., and, W. J. Mitsch, (2010), Methane emissions from created riverine wetlands, Wetlands, 30, 783-793, doi: 10.1007/s13157-010-0038-6.
65. Naiman, R. J., and, H. Décamps, (1997), The ecology of interfaces: Riparian zones, Annu. Rev. Ecol. Syst., 28 (1), 621-658, doi: 10.1146/annurev.ecolsys.28.1.621.
66. Nelson, D. W., and, L. E. Sommers, (1996), Total carbon, organic carbon and organic matter, in Methods of Soil Analysis. Part 3: Chemical Methods, edited by, D. L. Sparks, pp. 961-1010, Soil Science Society of America, Madison, Wis.
67. Noe, G. B., (2011), Measurement of net nitrogen and phosphorus mineralization in wetland soils using a modification of the resin-core technique, Soil Sci. Soc. Am. J., 75, 760-770, doi: 10.2136/sssaj2010.0289.
68. Noe, G. B., (2013), Interactions among hydrogeomorphology, vegetation, and nutrient biochemistry in floodplain ecosystems, in Treatise on Geomorphology, edited by, J. Shroder, et al., pp. 307-321, Academic Press, San Diego, Calif.
69. Noe, G. B., and, C. R. Hupp, (2005), Carbon, nitrogen, and phosphorus accumulation in floodplains of Atlantic Coastal Plain rivers, USA, Ecol. Appl., 15, 1178-1190, doi: 10.1890/04-1677.
70. Noe, G. B., and, C. R. Hupp, (2009), Retention of riverine sediment and nutrient loads by coastal plain floodplains, Ecosystems, 12, 728-746, doi: 10.1007/s10021-009-9253-5.
71. Noe, G. B., C. R. Hupp, and, N. B. Rybicki, (2013), Hydrogeomorphology influences soil nitrogen and phosphorus mineralization in floodplain wetlands, Ecosystems, 16, 75-94, doi: 10.1007/s10021-012-9597-0.
72. Poole, G. C., (2010), Stream hydrogeomorphology as a physical science basis for advances in stream ecology, J. North Am. Benthol. Soc., 29, 12-25, doi: 10.1899/08-070.1.
73. Pulliam, W. M., (1993), Carbon dioxide and methane exports from a southeastern floodplain swamp, Ecol. Monogr., 63 (1), 29-53, doi: 10.2307/2937122.
74. Reddy, K. R., and, R. D. DeLaune, (2008), Biogeochemistry of Wetlands: Science and Applications, CRC Press, Boca Raton, Fla.
75. Richardson, W. B., E. A. Strauss, L. A. Bartsch, E. M. Monroe, J. C. Cavanaugh, L. Vingum, and, D. M. Soballe, (2004), Denitrification in the Upper Mississippi River: Rates, controls, and contribution to nitrate flux, Can. J. Fish. Aquat. Sci., 61, 1102-1112, doi: 10.1139/f04-062.
76. Richey, J. E., A. H. Devol, S. C. Wofsy, R. Victoria, and, M. N. G. Riberio, (1988), Biogenic gases and the oxidation and reduction of carbon in Amazon River and floodplain waters, Limnol. Oceanogr., 33 (1), 551-561, doi: 10.4319/lo.1988.33.4.0551.
77. Robertson, G. P., P. Sollins, B. G. Ellis, and, K. Lajtha, (1999), Exchangeable ions, pH, and cation exchange capacity, in Standard Soil Methods for Long-Term Ecological Research, edited by, G. P. Robertson, et al., pp. 106-114, Oxford Univ. Press, New York.
78. Samaritani, E., J. Shrestha, B. Fournier, E. Frossard, F. Gillet, C. Guenat, P. A. Niklaus, N. Pasquale, K. Tockner, and, E. A. D. Mitchell, (2013), Heterogeneity of soil carbon pools and fluxes in a channelized and a restored floodplain section (Thur River, Switzerland), Hydrol. Earth Syst. Sci., 15, 1757-1769, doi: 10.5194/hess-15-1757-2011.
79. Sánchez-Andrés, R., S. Sánchez-Carrillo, M. J. Ortiz-Llorente, M. Álvarez-Cobelas, and, S. Cirujano, (2010), Do changes in flood pulse duration disturb soil carbon dioxide emissions in semi-arid floodplains?, Biogeochemistry, 101, 257-267, doi: 10.1007/s10533-010-9472-z.
80. Schenk, E. R., C. R. Hupp, A. Gellis, and, G. Noe, (2012), Developing a new stream metric for comparing stream function using a bank-floodplain sediment budget: A case study of three Piedmont streams, Earth Surf. Processes Landforms, 38, 771-784, doi: 10.1002/esp.3314.
81. Segers, R., (1998), Methane production and methane consumption: A review of processes underlying wetland methane fluxes, Biogeochemistry, 41 (1), 23-51, doi: 10.1023/A:1005929032764.
82. Sha, C., W. J. Mitsch, Ü. Mander, J. Lu, J. Batson, L. Zhang, and, W. He, (2011), Methane emissions from freshwater riverine wetlands, Ecol. Eng., 37, 16-24, doi: 10.1016/j.ecoleng.2010.07.022.
83. Sjögersten, S., R. van der Wal, and, S. J. Woodin, (2006), Small-scale hydrological variation determines landscape CO2 fluxes in the high Arctic, Biogeochemistry, 80, 205-216, doi: 10.1007/s10533-006-9018-6.
84. Slonecker, E. T., and, J. S. Tilley, (2004), An evaluation of the individual components and accuracies associated with the determination of impervious area, GIsci. Remote Sens., 41, 165-184.
85. Smith, L. K., W. M. Lewis Jr., J. P. Chanton, G. Cronin, and, S. K. Hamilton, (2000), Methane emissions from the Orinoco River floodplain, Venezuela, Biogeochemistry, 51 (2), 113-140, doi: 10.1023/A:1006443429909.
86. Spink, A., R. E. Sparks, M. Van Oorschot, and, J. T. A. Verhoeven, (1998), Nutrient dynamics of large river floodplains, Reg. Rivers Res. Manage., 14 (2), 203-216, doi:10.1002/(SICI)1099-1646(199803/04)14:2<203:AID-RRR498>3.0.CO;2-7.
87. Subke, J.-A., I. Inglima, and, M. Francesca Cotrufo, (2006), Trends and methodological impacts in soil CO2 efflux partitioning: A metaanalytical review, Global Change Biol., 12, 921-943, doi: 10.1111/j.1365-2486.2006.01117.x.
88. Terazawa, K., S. Ishizuka, T. Sakata, K. Yamada, and, M. Takahashi, (2007), Methane emissions from stems of Fraxinus mandshurica var. japonica trees in a floodplain forest, Soil Biol. Biochem., 39, 2689-2692, doi: 10.1016/j.soilbio.2007.05.013.
89. Thoms, M. C., (2003), Floodplain-river ecosystems: Lateral connections and the implications of human interference, Geomorphology, 56 (3), 335-349, doi: 10.1016/S0169-555X(03)00160-0.
90. Tockner, K., and, J. A. Stanford, (2002), Riverine flood plains: Present state and future trends, Environ. Conserv., 29 (03), 308-330, doi: 10.1017/S037689290200022X.
91. Updegraff, K., J. Pastor, S. D. Bridgham, and, C. A. Johnston, (1995), Environmental and substrate controls over carbon and nitrogen mineralization in northern wetlands, Ecol. Appl., 5 (1), 151-163, doi: 10.2307/1942060.
92. Updegraff, K., S. D. Bridgham, J. Pastor, P. Weishampel, and, C. Harth, (2001), Response of CO2 and CH4 emissions from peatlands to warming and water table manipulation, Ecol. Appl., 11 (2), 311-326, doi: 10.1890/1051-0761(2001)011[0311:ROCACE]2.0.CO;2.
93. US Geological Survey (2013), Water Data Report 2013-01646000 Difficult Run near Great Falls, VA, US Geological Survey, Reston, Va.
94. Valett, H. M., M. A. Baker, J. A. Morrice, C. S. Crawford, M. C. Molles Jr., C. N. Dahm, D. L. Moyer, J. R. Thibault, and, L. M. Ellis, (2005), Biogeochemical and metabolic responses to the flood pulse in a semiarid floodplain, Ecology, 86, 220-234, doi: 10.1890/03-4091.
95. Vannote, R. L., G. W. Minshall, K. W. Cummins, J. R. Sedell, and, C. E. Cushing, (1980), The river continuum concept, Can. J. Fish. Aquat. Sci., 37 (1), 130-137, doi: 10.1139/f80-017.
96. Verhoeven, J. T. A., B. Arheimer, C. Yin, and, M. M. Hefting, (2006), Regional and global concerns over wetlands and water quality, Trends Ecol. Evol., 21, 96-103, doi: 10.1016/j.tree.2005.11.015.
97. Waletzko, E. J., and, W. J. Mitsch, (2013), The carbon balance of two riverine wetlands fifteen years after their creation, Wetlands, 33, 989-999, doi: 10.1007/s13157-013-0457-2.
98. Ward, J. V., (1989), River-wetland interactions, in Freshwater Wetlands and Wildlife, edited by, R. R. Sharitz, and, J. W. Gibbons, pp. 385-400, USDOE Office of Scientific and Technical Information, Oak Ridge, Tenn.
99. Welti, N., E. Bondar-Kunze, G. Singer, M. Tritthart, S. Zechmeister-Boltenstern, T. Hein, and, G. Pinay, (2012), Large-scale controls on potential respiration and denitrification in riverine floodplains, Ecol. Eng., 42, 73-84, doi: 10.1016/j.ecoleng.2012.02.005.
100. Whiting, G. J., and, J. P. Chanton, (1993), Primary production control of methane emission from wetlands, Nature, 364 (6440), 794-795, doi: 10.1038/364794a0.
101. Whiting, G. J., J. P. Chanton, D. S. Bartlett, and, J. D. Happell, (1991), Relationships between CH4 emission, biomass, and CO2 exchange in a subtropical grassland, J. Geophys. Res. (1984-2012), 96 (D7), 13,067-13,071, doi: 10.1029/91JD01248.
102. Wickland, K. P., R. G. Striegl, S. K. Schmidt, and, M. A. Mast, (1999), Methane flux in subalpine wetland and unsaturated soils in the southern Rocky Mountains, Global Biogeochem. Cycles, 13 (1), 101-113, doi: 10.1029/1998GB900003.
103. Wickland, K. P., J. C. Neff, and, J. W. Harden, (2010), The role of soil drainage class in carbon dioxide exchange and decomposition in boreal black spruce (Picea mariana) forest stands, Can. J. For. Res., 40, 2123-2134, doi: 10.1139/X10-163.
104. Wilson, J. S., D. S. Baldwin, G. N. Rees, and, B. P. Wilson, (2011), The effects of short-term inundation on carbon dynamics, microbial community structure and microbial activity in floodplain soil, River Res. Appl., 27, 213-225, doi: 10.1002/rra.1352.
105. Wolf, K. L., G. B. Noe, and, C. Ahn, (2013), Hydrologic connectivity to streams increases nitrogen and phosphorus inputs and cycling in soils of created and natural floodplain wetlands, J. Environ. Qual., 42, 1245-1255, doi: 10.2134/jeq2012.0466.
106. Yu, K., S. P. Faulkner, and, M. J. Baldwin, (2008), Effect of hydrological conditions on nitrous oxide, methane, and carbon dioxide dynamics in a bottomland hardwood forest and its implication for soil carbon sequestration, Global Change Biol., 14, 798-812, doi: 10.1111/j.1365-2486.2008.01545.x.
107. Zehetner, F., G. J. Lair, and, M. H. Gerzabek, (2009), Rapid carbon accretion and organic matter pool stabilization in riverine floodplain soils, Global Biogeochem. Cycles, 23, GB4004, doi: 10.1029/2009GB003481.