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The ecology of methane in streams and rivers: patterns, controls, and global significance
Corresponding Author
Emily H. Stanley
Center for Limnology, University of Wisconsin, 680 North Park Street, Madison, Wisconsin, 53706 USA
E-mail: [email protected]Search for more papers by this authorNora J. Casson
Center for Limnology, University of Wisconsin, 680 North Park Street, Madison, Wisconsin, 53706 USA
Search for more papers by this authorSamuel T. Christel
Center for Limnology, University of Wisconsin, 680 North Park Street, Madison, Wisconsin, 53706 USA
Search for more papers by this authorJohn T. Crawford
U.S. Geological Survey, 3215 Marine Street Suite E127, Boulder, Colorado, 80303 USA
Search for more papers by this authorLuke C. Loken
Center for Limnology, University of Wisconsin, 680 North Park Street, Madison, Wisconsin, 53706 USA
Search for more papers by this authorSamantha K. Oliver
Center for Limnology, University of Wisconsin, 680 North Park Street, Madison, Wisconsin, 53706 USA
Search for more papers by this authorCorresponding Author
Emily H. Stanley
Center for Limnology, University of Wisconsin, 680 North Park Street, Madison, Wisconsin, 53706 USA
E-mail: [email protected]Search for more papers by this authorNora J. Casson
Center for Limnology, University of Wisconsin, 680 North Park Street, Madison, Wisconsin, 53706 USA
Search for more papers by this authorSamuel T. Christel
Center for Limnology, University of Wisconsin, 680 North Park Street, Madison, Wisconsin, 53706 USA
Search for more papers by this authorJohn T. Crawford
U.S. Geological Survey, 3215 Marine Street Suite E127, Boulder, Colorado, 80303 USA
Search for more papers by this authorLuke C. Loken
Center for Limnology, University of Wisconsin, 680 North Park Street, Madison, Wisconsin, 53706 USA
Search for more papers by this authorSamantha K. Oliver
Center for Limnology, University of Wisconsin, 680 North Park Street, Madison, Wisconsin, 53706 USA
Search for more papers by this authorAbstract
Streams and rivers can substantially modify organic carbon (OC) inputs from terrestrial landscapes, and much of this processing is the result of microbial respiration. While carbon dioxide (CO2) is the major end-product of ecosystem respiration, methane (CH4) is also present in many fluvial environments even though methanogenesis typically requires anoxic conditions that may be scarce in these systems. Given recent recognition of the pervasiveness of this greenhouse gas in streams and rivers, we synthesized existing research and data to identify patterns and drivers of CH4, knowledge gaps, and research opportunities. This included examining the history of lotic CH4 research, creating a database of concentrations and fluxes (MethDB) to generate a global-scale estimate of fluvial CH4 efflux, and developing a conceptual framework and using this framework to consider how human activities may modify fluvial CH4 dynamics. Current understanding of CH4 in streams and rivers has been strongly influenced by goals of understanding OC processing and quantifying the contribution of CH4 to ecosystem C fluxes. Less effort has been directed towards investigating processes that dictate in situ CH4 production and loss. CH4 makes a meager contribution to watershed or landscape C budgets, but streams and rivers are often significant CH4 sources to the atmosphere across these same spatial extents. Most fluvial systems are supersaturated with CH4 and we estimate an annual global emission of 26.8 Tg CH4, equivalent to ~15-40% of wetland and lake effluxes, respectively. Less clear is the role of CH4 oxidation, methanogenesis, and total anaerobic respiration to whole ecosystem production and respiration. Controls on CH4 generation and persistence can be viewed in terms of proximate controls that influence methanogenesis (organic matter, temperature, alternative electron acceptors, nutrients) and distal geomorphic and hydrologic drivers. Multiple controls combined with its extreme redox status and low solubility result in high spatial and temporal variance of CH4 in fluvial environments, which presents a substantial challenge for understanding its larger-scale dynamics. Further understanding of CH4 production and consumption, anaerobic metabolism, and ecosystem energetics in streams and rivers can be achieved through more directed studies and comparison with knowledge from terrestrial, wetland, and aquatic disciplines.
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Literature Cited
- Adams, D. D., and G. M. Simiyu. 2009. Greenhouse gas (methane and carbon dioxide) emissions from a tropical river in Kenya: the importance of anthropogenic factors on natural gas flux. Internationale Vereiningung für Theoretische und Angewandte Limnologie Verhandlungen 30: 887–889.
- Aerts, R., and H. de Caluwe. 1999. Nitrogen deposition effects on carbon dioxide and methane emissions from temperate peatland soils. Oikos 84: 44–54.
- Anthony, S. E., F. G. Prahl, and T. D. Peterson. 2012. Methane dynamics in the Willamette River, Oregon. Limnology and Oceanography 57: 1517–1530.
- Aronson, E. L., and B. R. Helliker. 2010. Methane flux in non-wetland soils in response to nitrogen addition: a meta-analysis. Ecology 91: 3242–3251.
- Aufdenkampe, A. K., E. Mayorga, P. A. Raymond, J. M. Melack, S. C. Doney, S. R. Alin, R. E. Aalto, and K. Yoo. 2011. Riverine coupling of biogeochemical cycles between land, oceans, and atmosphere. Frontiers in Ecology and the Environment 9: 53–60.
- Baker, M. A., C. N. Dahm, H. M. Valett, J. A. Morrice, K. S. Henry, M. E. Campana, and G. J. Wroblicky. 1994. Spatial and temporal variation in methane distribution at the ground water/surface water interface in headwater catchments. Pages 29–37 in J. A. Stanford, and H. M. Valett, editors. Proceedings of the second international conference on ground water ecology, American Water Resources Association, Herndon, VA, USA.
- Baker, M. A., C. N. Dahm, and H. M. Valett. 1999. Retention and metabolism in the hyporheic zone of a mountain stream. Limnology and Oceanography 44: 1530–1539.
- Baker, M. A., H. M. Valett, and C. N. Dahm. 2000. Organic carbon supply and metabolism in a shallow groundwater ecosystem. Ecology 81: 3133–3148.
- Barros, N., J. J. Cole, L. J. Tranvik, Y. T. Prairie, D. Bastviken, V. L. Huszar, P. del Giorgio, and F. Roland. 2011. Carbon emission from hydroelectric reservoirs linked to reservoir age and latitude. Nature Geoscience 4: 593–596.
- Bastviken, D., L. J. Tranvik, J. A. Downing, P. M. Crill, and A. Enrich-Prast. 2011. Freshwater methane emissions offset the continental carbon sink. Science 331: 50.
- Battin, T. J., S. Luyssaert, L. A. Kaplan, A. K. Aufdenkampe, A. Richter, and L. J. Tranvik. 2009. The boundless carbon cycle. Nature Geoscience 2: 598–600.
- Baulch, H. M., P. J. Dillon, R. Maranger, and S. Schiff. 2011a. Diffusive and ebullitive transport of methane and nitrous oxide from streams: are bubble-mediated fluxes important? Journal of Geophysical Research 116:G04028. doi:10.1029/2011JG001656.
- Baulch, H. M., S. L. Schiff, R. Maranger, and P. J. Dillon. 2011b. Nitrogen enrichment and the emission of nitrous oxide from streams. Global Biogeochemical Cycles 25:GB4013. doi:10.1029/2011GB004047.
- Beaulieu, J. J. 2007. Controls on greenhouse gas emissions from headwater streams. Dissertation. University of Notre Dame, Notre Dame, Indiana, USA.
- Beaulieu, J. J., et al. 2011. Nitrous oxide emission from denitrification in stream and river networks. Proceedings of the National Academy of Sciences USA 108: 214–219.
- Berger, U., and J. Heyer. 1989. Untersuchungen zum Methankreislauf in der Saale. Journal of Basic Microbiology 29: 195–213.
- Bethke, C. M., R. A. Sanford, M. F. Kirk, Q. Jin, and T. M. Flynn. 2011. The thermodynamic ladder in geomicrobiology. American Journal of Science 311: 183–210.
- Billett, M. F., and F. H. Harvey. 2013. Measurements of CO2 and CH4 evasion from UK peatland headwater streams. Biogeochemistry 114: 165–181.
- Bodelier, P. L. E., and A. K. Steenbergh. 2014. Interactions between methane and the nitrogen cycle in light of climate change. Current Opinions in Environmental Sustainability 9–10: 26–36.
- Bogard, M. J., P. A. del Giorgio, L. Boutet, M. C. Garcia Chaves, and Y. T. Prairie. 2014. Oxic water column methanogenesis as a major component of aquatic CH4 fluxes. Nature Communications 5: 5350. doi:10.1038/ncomms6350.
- Bonnett, S. A. F., M. S. A. Blackwell, R. Leah, V. Cook, M. O'Connor, and E. Maltby. 2013. Temperature response of denitrification rate and greenhouse gas production in agricultural river margin wetland soils. Geobiology 11: 252–267.
- Borges, A. V., et al. 2015. Globally significant greenhouse-gas emissions from African inland waters. Nature Geoscience 8: 637–642.
- Borrel, G., D. Jézéquel, C. Biderre-Petit, N. Morel-Desrosiers, J.-P. Morel, P. Peyret, G. Fonty, and A.-C. Lehours. 2011. Production and consumption of methane in freshwater lake ecosystems. Research in Microbiology 162: 832–847.
- Bouillon, S., A. Yambélé, D. P. Gillikin, C. Teodoru, F. Darchambeau, T. Lambert, and A. V. Borges. 2014. Contrasting biogeochemical characteristics of the Oubangui River and tributaries (Congo River basin). Scientific Reports 4: 5402. doi:10.1038/srep05402.
- Boulton, A. J., S. Findlay, P. Marmonier, E. H. Stanley, and H. M. Valett. 1998. The functional significance of the hyporheic zone in streams and rivers. Annual Review of Ecology and Systematics 29: 59–81.
- Bresney, S. R., S. Moseman-Valtierra, and N. P. Snyder. 2015. Observations of greenhouse gases and nitrate concentrations in a Maine river and fringing wetland. Northeastern Naturalist 22: 120–143.
- Bridgham, S. D., H. Cadillo-Quiroz, J. K. Keller, and Q. Zhuang. 2013. Methane emissions from wetlands: biogeochemical, microbial and modeling perspectives from local to global scales. Global Change Biology 19: 1323–1346.
- Buriánková, I., L. Brablcová, V. Mach, P. Dvorˇák, P. P. Chaudhary, and M. Rulík. 2013. Identification of methanogenic Archaea in the hyporheic sediment of Sitka stream. PLoS ONE 8: e80804 doi10.1371/journal.pone.0080804.
- Burkholder, B. K., G. E. Grant, R. Haggerty, T. Khangaonkar, and P. J. Wampler. 2008. Influence of hyporheic flow and geomorphology on temperature of a large, gravel-bed river, Clackamas River, Oregon, USA. Hydrological Processes 22: 941–953.
- Bussmann, I. 2013. Distribution of methane in the Lena Delta and Buor-Khaya Bay, Russia. Biogeosciences 10: 4641–4652.
- Butman, D., and P. A. Raymond. 2011. Significant efflux of carbon dioxide from streams and rivers of the United States. Nature Geoscience 4: 839–842.
- Campeau, A., and P. A. del Giorgio. 2014. Patterns in CH4 and CO2 concentrations across boreal rivers: major drivers and implications for fluvial greenhouse emissions under climate change scenarios. Global Change Biology 20: 1075–1088.
- Campeau, A., J. F. Lapierre, D. Vachon, and P. A. del Giorgio. 2014. Regional contribution of CO2 and CH4 fluxes from the fluvial network in a lowland boreal landscape of Québec. Global Biogeochemical Cycles 28: 57–69.
- Carpenter, S. R., E. H. Stanley, and M. J. Vander Zanden. 2011. State of the world's freshwater ecosystems: physical, chemical, and biological changes. Annual Review of the Environment and Resources 36: 75–99.
- Chowdhury, T. R., and R. P. Dick. 2013. Ecology of aerobic methanotrophs in controlling methane fluxes from wetlands. Applied Soil Ecology 65: 8–22.
- Christensen, P. B., L. P. Nielsen, J. Sorensen, and N. P. Revsbech. 1990. Denitrification in nitrate-rich streams: diurnal and seasonal variation related to benthic oxygen metabolism. Limnology and Oceanography 35: 640–651.
- Clilverd, H. M., J. B. Jr Jones, and K. Kiell. 2008. Nitrogen retention in the hyporheic zone of a glacial river in interior Alaska. Biogeochemistry 88: 31–46.
- Cole, J. J., et al. 2007. Plumbing the global carbon cycle: integrating inland waters into the terrestrial carbon budget. Ecosystems 10: 171–184.
- Conrad, R. 2009. The global methane cycle: recent advances in understanding the microbial processes involved. Environmental Microbiology Reports 1: 285–292.
- Crawford, J. T., and E. H. Stanley. Controls on methane concentrations and fluxes in streams draining human-dominated landscapes. Ecological Applications doi:10.1890/15-1330
- Crawford, J. T., R. G. Striegl, K. P. Wickland, M. M. Dornblaser, and E. H. Stanley. 2013. Emissions of carbon dioxide and methane from a headwater stream network of interior Alaska. Journal of Geophysical Research Biogeosciences 118: 482–494.
- Crawford, J. T., N. R. Lottig, E. H. Stanley, J. F. Walker, P. C. Hanson, J. C. Finlay, and R. G. Striegl. 2014a. CO2 and CH4 emissions from streams in a lake-rich landscape: patterns, controls, and regional significance. Global Biogeochemical Cycles 28: 197–210.
- Crawford, J. T., E. H. Stanley, S. A. Spawn, J. C. Finlay, L. C. Loken, and R. G. Striegl. 2014b. Ebullitive methane emissions from oxygenated wetland streams. Global Change Biology 20: 3408–3422.
- Crawford, J. T., L. C. Loken, N. J. Casson, C. Smith, A. G. Stone, and L. A. Winslow. 2015. High-speed limnology: using advanced sensors to investigate spatial variability in biogeochemistry and hydrology. Environmental Science & Technology 49: 442–450.
- Dahm, C. N., D. L. Carr, and R. L. Coleman. 1991. Anaerobic carbon cycling in stream ecosystems. Internationale Vereiningung für Theoretische und Angewandte Limnologie Verhandlungen 24: 1600–1604.
- Dawson, J. J. C., M. F. Billett, C. Neal, and S. Hill. 2002. A comparison of particulate, dissolved, and gaseous carbon in two contrasting upland streams in the U.K. Journal of Hydrology 257: 226–246.
- Dawson, J. J. C., M. F. Billett, D. Hope, S. M. Palmer, and C. M. Deacon. 2004. Sources and sinks of aquatic carbon in a peatland stream continuum. Biogeochemistry 70: 71–92.
- de Angelis, M. A., and M. D. Lilley. 1987. Methane in surface waters of Oregon estuaries and rivers. Limnology and Oceanography 32: 716–722.
- de Angelis, M. A., and M. I. Scranton. 1993. Fate of methane in the Hudson River and estuary. Global Biogeochemical Cycles 7: 509–523.
- DelSontro, T., D. F. McGinnis, B. Wehrli, and I. Ostrovsky. 2015. Size does matter: importance of large bubbles and small-scale hot spots for methane transport. Environmental Science & Technology 49: 1268–1276.
- Dent, C. L., and N. B. Grimm. 1999. Spatial heterogeneity of stream water nutrient concentrations over successional time. Ecology 80: 2283–2298.
- Dinsmore, K. J., M. F. Billett, and K. E. Dyson. 2013. Temperature and precipitation drive temporal variability in aquatic carbon and GHG concentrations and fluxes in a peatland catchment. Global Change Biology 19: 2133–2148.
- Dodla, S. K., J. J. Wang, R. D. Delaune, and G. Breitenbeck. 2009. Carbon gas production under different electron acceptors in a freshwater marsh soil. Chemosphere 76: 517–522.
- Dyson, K. E., M. F. Billett, K. J. Dinsmore, F. Harvey, A. M. Thomson, S. Piirainen, and P. Kortelainen. 2011. Release of aquatic carbon from two peatland catchments in E. Finland during the spring snowmelt period. Biogeochemistry 103: 125–142.
- Ellis, E. C., K. Klein Goldewijk, S. Siebert, D. Lightman, and N. Ramankutty. 2010. Anthropogenic transformation of the biomes, 1700 to 2000. Global Ecology and Biogeography 19: 589–606.
- EPA. 2012. Watershed assessment, tracking and environmental results. National summary of state information reporting year 2012. U.S. Environmental Protection Agency. http://ofmpub.epa.gov/waters10/attains_index.control
- Etiope, G., and R. W. Klusman. 2002. Geologic emissions of methane to the atmosphere. Chemosphere 49: 777–789.
- Fallon, R. D., S. Harrits, R. S. Hanson, and T. D. Brock. 1980. The role of methane in internal carbon cycling in Lake Mendota during summer stratification. Limnology and Oceanography 25: 357–360.
- Finlay, J. C. 2003. Controls on streamwater dissolved inorganic carbon dynamics in a forested watershed. Biogeochemistry 62: 231–252.
- Fisher, S. G. 1997. Creativity, idea generation, and functional morphology of streams. Journal of the North American Benthological Society 16: 305–318.
- Fisher, S. G., and G. E. Likens. 1973. Energy flow in Bear Brook, New Hampshire: an integrative approach to stream ecosystem metabolism. Ecological Monographs 43: 421–439.
- Flessa, H., A. Rodionov, G. Goggenberger, H. Fuchs, P. Magdon, O. Shibistova, G. Zrazhevskaya, N. Mikheyeva, O. A. Kasansky, and C. Blodau. 2008. Landscape control of CH4 fluxes in a catchment of the forest tundra ecotone of northern Siberia. Global Change Biology 14: 2040–2056.
- Foley, J. A., et al. 2011. Solutions for a cultivated planet. Nature 478: 337–342.
- Ford, T. E., and R. J. Naiman. 1988. Alteration of carbon cycling by beaver: methane evasion rates from boreal forest streams and rivers. Canadian Journal of Zoology 66: 529–533.
- Forster, P., et al. 2007. Changes in atmospheric constituents and in radiative forcing. Pages 129–234 in S. Solomon, D. Qin, M. Manning, Z. L. Chen, M. Marquis, K. B. Averyt, M. M. B. Tignor, and H. L. Miller, editors. 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, UK.
- Frenette, M., and P. Y. Julien. 1996. Physical processes governing reservoir sedimentation. Pages 121–142 in Proceedings of the International Conference on Reservoir Sedimentation. Volume 1. Colorado State University, Fort Collins, Colorado, USA.
- Frissell, C. A., W. J. Liss, C. E. Warren, and M. D. Hurley. 1986. A hierarchical framework for stream habitat classification: viewing streams in a watershed context. Environmental Management 10: 199–214.
- Garnier, J., G. Vilain, M. Silvestre, G. Billen, S. Jehanno, D. Poirier, A. Martinez, C. Decuq, P. Cellier, and G. Abril. 2013. Budget of methane emissions from soils, livestock and the river network at the regional scale of the Seine basin (France). Biogeochemistry 116: 199–214.
- Gatland, J. R., I. R. Santos, D. T. Maher, T. M. Duncan, and D. V. Erler. 2014. Carbon dioxide and methane emissions from an artificially drained coastal wetland during a flood: implications for wetland global warming potential. Journal of Geophysical Research: Biogeosciences 119: 1698–1716.
- Gauci, V., E. Matthews, N. Dise, B. Walter, D. Koch, G. Granberg, and M. Vile. 2004. Sulfur pollution suppression of the wetland methane source in the 20th and 21st centuries. Proceedings of the National Academy of Sciences USA 101: 12583–12587.
- Glendell, M., and R. E. Brazier. 2014. Accelerated export of sediment and carbon from a landscape under intensive agriculture. Science of the Total Environment 476–477: 643–656.
- Graeber, D., J. Gelbrecht, M. T. Pusch, C. Anlanger, and D. von Schiller. 2012. Agriculture has changed the amount and composition of dissolved organic matter in Central European headwater streams. Science of the Total Environment 438: 435–446.
- Granberg, G., I. Sundh, B. H. Svensson, and M. Nilsson. 2001. Effects of temperature, and nitrogen and sulfur deposition, on methane emission from a boreal mire. Ecology 82: 1982–1998.
- Grossart, H.-P., K. Frindte, C. Dziallas, W. Eckert, and K. W. Tang. 2011. Microbial methane production in oxygenated water column of an oligotrophic lake. Proceedings of the National Academy of Sciences USA 108: 19657–19661.
- Guérin, F., G. Abril, D. Serça, S. Richard, R. B. Burban, C. Reynouard, P. Seyler, and R. Delmas. 2006. Methane and carbon dioxide emissions from tropical reservoirs: significance of downstream rivers. Geophysical Research Letters 33: L21407. doi:10.1029/2006GL027929.
- Guérin, F., G. Abril, D. Serça, C. Delon, S. Richard, R. Delmas, A. Tremblay, and L. Varfalvy. 2007. Gas transfer velocities of CO2 and CH4 in a tropical reservoir and its river downstream. Journal of Marine Systems 66: 161–172.
- Hancock, P. J. 2002. Human impacts on the stream-groundwater exchange zone. Environmental Management 29: 763–781.
- Hansen, J., M. Sato, R. Ruedy, A. Lacis, and V. Oinas. 2000. Global warming in the twenty-first century: an alternative scenario. Proceedings of the National Academy of Sciences USA 18: 9875–9880.
- Harrison, J. A., P. A. Matson, and S. E. Fendorf. 2005. Effects of a diel oxygen cycle on nitrogen transformations and greenhouse gas emissions in a eutrophied subtropical stream. Aquatic Sciences 67: 308–315.
- Harrison, M. D., P. M. Groffman, P. M. Mayer, and S. S. Kaushal. 2012. Microbial biomass and activity in geomorphic features in forested and urban restored and degraded streams. Ecological Engineering 38: 1–10.
- Hedin, L. O., J. C. von Fischer, N. E. Ostrom, B. P. Kennedy, M. G. Brown, and G. P. Robertson. 1998. Thermodynamic constraints on nitrogen transformations and other biogeochemical processes at soil–stream interfaces. Ecology 79: 684–703.
- Heffernan, J. B., R. A. Sponseller, and S. G. Fisher. 2008. Consequences of a biogeomorphic regime shift for the hyporheic zone of a Sonoran Desert stream. Freshwater Biology 53: 1954–1968.
- Heilweil, V. M., P. L. Grieve, S. A. Hynek, S. L. Brantley, D. K. Solomon, and D. W. Risser. 2015. Stream measurements locate thermogenic methane fluxes in groundwater discharge in an area of shale-gas development. Environmental Science & Technology 49: 4057–4065.
- Herlihy, A. T., J. L. Stoddard, and C. B. Johnson. 1998. The relationship between stream chemistry and watershed land cover data in the mid-Atlantic region, U.S. Water, Air and Soil Pollution 105: 377–386.
- Hertwich, E. G. 2013. Addressing biogenic greenhouse gas emissions from hydropower in LCA. Environmental Science & Technology 47: 9604–9611.
- Hlavácˇová, E., M. Rulík, and L. Cˇáp. 2005. Anaerobic microbial metabolism in hyporheic sediment of a gravel bar in a small lowland stream. River Research and Applications 21: 1003–1011.
- Hlavácˇová, E., M. Rulík, L. Cˇáp, and V. Mach. 2006. Greenhouse gas (CO2, CH4, N2O) emissions to the atmosphere from a small lowland stream in Czech Republic. Archiv für Hydrobiologie 165: 339–353.
- Hodgkins, S. B., M. M. Tfaily, C. K. McCalley, T. A. Logan, P. M. Crill, S. R. Saleska, V. I. Rich, and J. P. Chanton. 2014. Changes in peat chemistry associated with permafrost thaw and increased greenhouse gas production. Proceedings of the National Academy of Sciences USA 111: 5, 819–5, 824.
- Hooke, R. L. 2000. On the history of humans as geomorphic agents. Geology 28: 843–846.
- Hope, D., S. M. Palmer, M. F. Billett, and J. J. C. Dawson. 2001. Carbon dioxide and methane evasion from a temperate peatland stream. Limnology and Oceanography 46: 847–857.
- Hosen, J. D., O. T. McDonough, C. M. Febria, and M. A. Palmer. 2014. Dissolved organic matter quality and bioavailability changes across an urbanization gradient in headwater streams. Environmental Science & Technology 48: 7817–7824.
- Hyvönen, N. P., J. T. Huttunen, N. J. Shurpali, S. E. Lind, M. E. Marushchak, L. Heitto, and P. J. Martikainen. 2013. The role of drainage ditches in greenhouse gas emissions and surface leaching losses from a cutaway peatland cultivated with a perennial bioenergy crop. Boreal Environment Research 18: 109–126.
- IPCC. 2013. 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, UK.
- Jones, R. I., and J. Grey. 2011. Biogenic methane in freshwater food webs. Freshwater Biology 56: 213–229.
- Jones, J. B. Jr, and P. J. Mulholland. 1998a. Influence of drainage basin topography and elevation on carbon dioxide and methane supersaturation of stream water. Biogeochemistry 40: 57–72.
- Jones, J. B. Jr, and P. J. Mulholland. 1998b. Methane input and evasion in a hardwood forest stream: effects of subsurface flow from shallow and deep pathways. Limnology and Oceanography 43: 1243–1250.
- Jones, J. B. Jr, R. M. Holmes, S. G. Fisher, and N. B. Grimm. 1994. Chemoautotrophic production and respiration in the hyporheic zone of a Sonoran Desert stream. Pages 329–338 in J. A. Stanford, and H. M. Valett, editors. Proceedings of the second international conference on ground water ecology. American Water Resources Association, Herndon, Virginia, USA.
- Jones, J. B. Jr, R. M. Holmes, S. G. Fisher, N. B. Grimm, and D. M. Greene. 1995. Methanogenesis in Arizona, USA dryland streams. Biogeochemistry 31: 155–173.
- Jones, J. B. Jr, E. H. Stanley, and P. J. Mulholland. 2003. Long-term decline in carbon dioxide supersaturation in rivers across the contiguous United States. Geophysical Research Letters 30: 1495. doi:10.1029/2003GL017056.
- Julian, J. P., E. H. Stanley, and M. W. Doyle. 2008. Basin-scale consequences of agricultural land use on benthic light availability and primary production along a 6th-order temperate river. Ecosystems 11: 1091–1105.
- Juutinen, S. M., V. Väliranta, A. M. Kuutti, T. Laine, H. Virtanen, J. Weckström. Seppä, and E.-S. Tuittila. 2013. Short-term and long-term carbon dynamics in a northern peatland-stream-lake continuum: a catchment approach. Journal of Geophysical Research Biogeosciences 118: 171–183.
- Karl, D. M., L. Beversdorf, K. M. Björkman, M. J. Church, A. Martinez, and E. F. DeLong. 2008. Aerobic production of methane in the sea. Nature Geoscience 1: 473–478.
- Kaushal, S. S., G. E. Likens, N. A. Jaworski, M. L. Pace, A. M. Sides, D. Seekell, K. T. Belts, D. H. Secor, and R. L. Wingate. 2010. Rising stream and river temperatures in the United States. Frontiers in Ecology and the Environment 8: 461–466.
- Kaushal, S. S., P. M. Mayer, P. G. Vidon, R. M. Smith, M. J. Pennino, T. A. Newcomer, S. Duan, C. Welty, and K. T. Belt. 2014. Land use and climate variability amplify carbon, nutrient, and contaminant pulses: a review with management implications. Journal of the American Water Resources Association 50: 585–614.
- Keller, J. K., and S. D. Bridgham. 2007. Pathways of anaerobic carbon cycling across an ombrotrophic-minerotrophic peatland gradient. Limnology and Oceanography 52: 96–107.
- Keller, J. K., A. K. Bauers, S. D. Bridgham, L. E. Kellogg, and C. M. Iversen. 2006. Nutrient control of microbial carbon cycling along an ombrotrophic-minerotrophic peatland gradient. Journal of Geophysical Research: Biogeosciences 111: G03006. doi:10.1029/2005JG000152.
- Keller, J. K., P. B. Weisenhorn, and P. J. Megonigal. 2009. Humic acids as electron acceptors in wetland decomposition. Soil Biology and Biochemistry 41: 1518–1522.
- Kelly, C. A., et al. 1997. Increases in fluxes of greenhouse gases and methyl mercury following flooding of an experimental reservoir. Environmental Science & Technology 31: 1334–1344.
- Kemenes, A., B. R. Forsberg, and J. M. Melack. 2007. Methane release below a tropical hydroelectric dam. Geophysical Research Letters 34: L12809. doi:10.1029/2007GL029479.
- Kerimoglu, O., and K. Rinke. 2013. Stratification dynamics in a shallow reservoir under different hydro-meteorological scenarios and operation strategies. Water Resources Research 49: 7518–7527.
- Kietäväinen, R., and L. Purkamo. 2015. The origin, source, and cycling of methane in deep crystalline rock biosphere. Frontiers in Microbiology 6: 725. doi:10.3389/fmicb.2015.00725.
- Kirschke, S., et al. 2013. Three decades of global methane sources and sinks. Nature Geoscience 10: 813–823.
- Kling, G. W., G. W. Kipphut, and M. C. Miller. 1992. The flux of CO2 and CH4 from lakes and rivers in arctic Alaska. Hydrobiologia 240: 23–36.
- Knox, J. C. 2006. Floodplain sedimentation in the Upper Mississippi Valley: natural versus human accelerated. Geomorphology 79: 286–310.
- Kohzu, A., C. Kato, T. Iwata, D. Kishi, M. Murakami, S. Nakano, and E. Wada. 2004. Stream food web fueled by methane-derived carbon. Aquatic Microbial Ecology 36: 189–194.
- Koné, Y. J. M., G. Abril, B. Delille, and A. V. Borges. 2010. Seasonal variability of methane in the rivers and lagoons of Ivory Coast (West Africa). Biogeochemistry 100: 21–37.
- Laiho, R. 2006. Decomposition in peatlands: reconciling seemingly contrasting results on the impacts of lowered water levels. Soil Biology and Biochemistry 38: 2011–2024.
- Lamontagne, R. A., J. W. Swinnerton, V. J. Linnebom, and W. D. Smith. 1973. Methane concentrations in various marine environments. Journal of Geophysical Research 78: 5317–5324.
- Lazar, J. G., K. Addy, M. K. Welsh, A. J. Gold, and P. M. Groffman. 2014. Resurgent beaver ponds in the Northeastern United States: implications for greenhouse gas emissions. Journal of Environmental Quality 43: 1844–1852.
- Lilley, M. D., M. A. de Angelis, and E. J. Olson. 1996. Methane concentrations and estimated fluxes from Pacific Northwest rivers. Mitteilungen Internationale Vereinigung für Theoretische und Angewandte Limnologie 25: 187–196.
- Lima, I. B. T., F. M. Ramos, L. A. W. Bambace, and R. R. Rosa. 2008. Methane emissions from large dams as renewable energy resources: a developing nation perspective. Mitigation and Adaptation Strategies to Global Change 13: 193–206.
- Liu, L., and T. L. Greaver. 2009. A review of nitrogen enrichment effects on three biogenic GHGs: the CO2 sink may be largely offset by stimulated N2O and CH4 emission.Ecology Letters 12: 1103–1117.
- Lovley, D. R., and M. J. Klug. 1986. Model for the distribution of sulfate reduction and methanogenesis in freshwater sediments. Geochimica et Cosmochimica Acta 50: 11–18.
- Lovley, D. R., J. D. Coates, E. L. Blunt-Harris, E. J. Phillips, and J. C. Woodward. 1996. Humic substances as electron acceptors for microbial respiration. Nature 382: 445–448.
- Luan, J., and J. Wu. 2015. Long-term agricultural drainage stimulates CH4 emissions from ditches through increased substrate availability in boreal peatlands. Agriculture, Ecosystems and Environment 214: 68–77.
- Lundin, E. J., R. Giesler, A. Persson, M. S. Thompson, and J. Karlsson. 2013. Integrating carbon emissions from lakes and streams in a subarctic catchment. Journal of Geophysical Research Biogeosciences 118: 1200–1207.
- Maeck, A., T. DelSontro, D. F. McGinnis, H. Fischer, S. Flury, M. Schmidt, P. Fietzek, and A. Lorke. 2013. Sediment trapping by dams creates methane emission hot spots. Environmental Science & Technology 47: 8130–8137.
- Maher, D. T., I. R. Santos, J. R. F. W. Leuven, J. M. Oakes, D. V. Erler, M. C. Carvahlo, and B. D. Eyre. 2013. Novel use of cavity ring-down spectroscopy to investigate aquatic carbon cycling from microbial to ecosystem scales. Environmental Science & Technology 47: 12938–12945.
- Marwick, T. R., F. Tamooh, B. Ogwoka, C. Teodoru, A. V. Borges, F. Darchambeau, and S. Bouillon. 2014. Dynamic seasonal nitrogen cycling in response to anthropogenic N loading in a tropical catchment, Athi–Galana–Sabaki River, Kenya. Biogeosciences 11: 443–460.
- Matthews, C. J., E. M. Joyce, V. L. St, S. L. Louis, J. J. Schiff, B. D. Venkiteswaran, R. A. Bodaly. Hall, and K. G. Beaty. 2005. Carbon dioxide and methane production in small reservoirs flooding upland boreal forest. Ecosystems 8: 267–285.
- McCrackin, M. L., and J. J. Elser. 2011. Greenhouse gas dynamics in lakes receiving atmospheric nitrogen deposition. Global Biogeochemical Cycles 25: GB4005. doi:10.1029/2010GB003897.
- McLinn, E. L., and T. R. Stolzenburg. 2009. Ebullition-facilitated transport of manufactured gas plant tar from contaminated sediment. Environmental Toxicology and Chemistry 28: 2298–2306.
- Megonigal, J. P., M. E. Hines, and P. T. Visscher. 2004. Anaerobic metabolism: linkages to trace gases and aerobic processes. Pages 317–424 in W. H. Schlesinger, editor. Biogeochemistry. Elsevier-Pergamon, Oxford, UK.
- Melton, J. R., et al. 2013. Present state of global wetland extent and wetland methane modelling: conclusions from a model inter-comparison project (WETCHIMP). Biogeosciences 10: 753–788.
- Minderlein, S., and C. Blodau. 2010. Humic-rich peat extracts inhibit sulfate reduction, methanogenesis, and anaerobic respiration but not acetogenesis in peat soils of a temperate bog. Soil Biology and Biochemistry 42: 2078–2086.
- Minkkinen, K., J. Laine, H. Nykänen, and P. J. Martikainen. 1997. Importance of drainage ditches in emissions of methane from mires drained for forestry. Canadian Journal of Forest Research 27: 949–952.
- Moens, N. L. W. I. 1957. Untersuchungen über den Schlamm und die Gasbildung in den Amsterdamer Grachten in den Jahre 1929 bis 1931. Hydrobiologia 9: 13–24.
10.1007/BF00150056 Google Scholar
- Montgomery, D. R. 1999. Process domains and the river continuum. Journal of the American Water Resources Association 35: 397–410.
- Morrice, J. A., C. N. Dahm, H. M. Valett, P. V. Unnikrishna, and M. E. Campana. 2000. Terminal electron accepting processes in the alluvial sediments of a headwater stream. Journal of the North American Benthological Society 19: 593–608.
- Mulholland, P. J., et al. 2008. Stream denitrification across biomes and its response to anthropogenic nitrate loading. Nature 452: 202–206.
- Naiman, R. J., J. M. Melillo, M. A. Lock, T. E. Ford, and S. R. Reice. 1987. Longitudinal patterns of ecosystem processes and community structure in a subarctic river continuum. Ecology 68: 1139–1156.
- Naiman, R. J., T. Manning, and C. A. Johnston. 1991. Beaver population fluctuations and tropospheric methane emissions in boreal wetlands. Biogeochemistry 12: 1–15.
- Neal, C., W. A. House, H. P. Jarvie, and A. Eatherall. 1998. The significance of dissolved carbon dioxide in major lowland rivers entering the North Sea. Science of the Total Environment 210: 187–203.
- Needelman, B. A., P. J. A. Kleinman, J. S. Strock, and A. L. Allen. 2007. Improved management of agricultural ditches for water quality protection: an overview. Journal of Soil and Water Conservation 62: 171–178.
- Neu, V., C. Neill, and A. V. Krusche. 2011. Gaseous and fluvial carbon export from an Amazon forest watershed. Biogeochemistry 105: 133–147.
- Nilsson, C., C. A. Reidy, M. Dynesius, and C. Revenga. 2005. Fragmentation and flow regulation of the World's large river systems. Science 308: 405–408.
- Nisbet, E. G., E. J. Dlugokencky, and P. Bousquet. 2014. Methane on the rise- again. Science 343: 493–495.
- Nozhevnikova, A. N., C. Holliger, A. Ammann, and A. J. B. Zehnder. 1997. Methanogenesis in sediments from deep lakes at different temperatures (2–70˚ C). Water Science and Technology 36: 57–64.
- Odum, H. T. 1956. Primary production in flowing waters. Limnology and Oceanography 1: 102–117.
- Olson, D. M., et al. 2001. Terrestrial ecoregions of the world: a new map of life on Earth. BioScience 51: 933–938.
- Orr, H. G., et al. 2015. Detecting changing river temperatures in England and Wales. Hydrological Processes 29: 752–766.
- Ortiz-Llorente, M. J., and M. Alvarez-Cobelas. 2012. Comparison of biogenic methane emissions from unmanage estuaries, lakes, oceans, rivers and wetlands. Atmospheric Environment 59: 328–337.
- Palma-Silva, C., C. C. Marinho, A. F. Albertoni, I. B. Giacomini, M. P. F. Barros, L. M. Furlanetto, C. R. T. Trindade, and F. A. de Esteves. 2013. Methane emissions in two small shallow neotropical lakes: the role of temperature and trophic level. Atmospheric Environment 81: 373–379.
- Palviainen, M., J. Lehtoranta, P. Ekholm, T. Ruoho-Airola, and P. Kortelainen. 2015. Land cover controls the export of terminal electron acceptors from boreal catchments. Ecosystems 18: 343–358. doi:10.2007/s10021-014-9832-y.
- Poff, N. L., and D. D. Hart. 2002. How dams vary and why it matters for the emerging science of dam removal. BioScience 52: 659–668.
- Porat, I., et al. 2010. Characterization of Archaeal community in contaminated and uncontaminated surface stream sediments. Micobial Ecology 60: 784–795.
- Powers, S. M., J. P. Julian, M. W. Doyle, and E. H. Stanley. 2013. Retention and transport of nutrients in a mature agricultural impoundment. Journal of Geophysical Research: Biogeosciences 118: 91–103.
- Pulliam, W. M. 1993. Carbon dioxide and methane exports from a southeastern floodplain swamp. Ecological Monographs 63: 29–53.
- Purvaja, R., and R. Ramesh. 2001. Natural and anthropogenic methane emissions from coastal wetlands of South India. Environmental Management 27: 547–557.
- Rajkumar, A. N., J. Barnes, R. Ramesh, R. Purvaja, and R. C. Upstill-Goddard. 2008. Methane and nitrous oxide fluxes in the polluted Adyar River and estuary, SE India. Marine Pollution Bulletin 56: 2043–2051.
- Ramaswamy, V. 2001. Radiative forcing of climate change. Pages 349–416 in J. T. Houghton, editor. Climate change 2001: the scientific basis. Contribution of Working Group I to the Third Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge University Press, Cambridge, UK.
- Raymond, P. A., C. J. Zappa, D. Butman, T. L. Bott, J. Potter, P. Mulholland, A. E. Laursen, W. H. McDowell, and D. Newbold. 2012. Scaling the gas transfer velocity and hydraulic geometry in streams and small rivers. Limnology and Oceanography Fluids and Environments 2: 41–53.
10.1215/21573689-1597669 Google Scholar
- Raymond, P. A., et al. 2013. Global carbon dioxide emissions from inland waters. Nature 503: 355–359.
- Reeburgh, W. S., J. Y. King, S. K. Regli, G. W. Kling, N. A. Auerbach, and D. A. Walker. 1998. A CH4 emission estimate for the Kuparek River basin, Alaska. Journal of Geophysical Research Atmospheres 103: 29005–29013.
- 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. Limnology and Oceanography 33: 551–561.
- Roden, E. E., and R. G. Wetzel. 1996. Organic carbon oxidation and suppression of methane production by microbial Fe(III) oxide reduction in vegetated and unvegetated freshwater wetland sediments. Limnology and Oceanography 41: 1733–1748.
- Roulet, N. T., P. M. Crill, N. T. Comer, A. Dove, and R. A. Boubonniere. 1997. CO2 and CH4 flux between a boreal beaver pond and the atmosphere. Journal of Geophysical Research 102: 29313–29319.
- Roulet, N. T., and T. R. Moore. 1995. The effect of forestry drainage practices on the emission of methane from northern peatlands. Canadian Journal of Forest Research 25: 491–499.
- Rudd, J. W. M., and R. D. Hamilton. 1978. Methane cycling in a eutrophic lake and its effect on whole lake metabolism. Limnology and Oceanography 23: 337–348.
- Saarnio, S., W. Winiwarter, and J. Leitao. 2009. Methane release from wetlands and watercourses in Europe. Atmospheric Environment 43: 1421–1429.
- Sanders, I. A., C. M. Heppell, J. A. Cotton, G. Wharton, A. G. Hildrew, E. J. Flowers, and M. Trimmer. 2007. Emission of methane from chalk streams has potential implications for agricultural practices. Freshwater Biology 52: 1176–1186.
- Sawakuchi, H. O., D. Bastviken, A. O. Sawakuchi, A. V. Krusche, M. V. R. Ballester, and J. E. Richey. 2014. Methane emissions from Amazonian Rivers and their contribution to the global methane budget. Global Change Biology 9: 2829–2840.
- Scanlon, B. R., I. Jolly, M. Sophocleous, and L. Zhang. 2007. Global impacts of conversions from natural to agricultural ecosystems on water resources: quantity versus quality. Water Resources Research 43: W03437. doi:10.1029/2006WR005486.
- Schindler, J. E., and D. P. Krabbenhoft. 1998. The hyporheic zone as a source of dissolved organic carbon and carbon gases to a temperate forested stream. Biogeochemistry 43: 157–174.
- Schrier-Uijl, A. P., P. S. Kroon, P. A. Leffelaar, J. C. van Huissteden, F. Berendse, and E. M. Veenendaal. 2010. Methane emissions in two drained peat agro-ecosystems with high and low agricultural intensity. Plant and Soil 329: 509–520.
- Schrier-Uijl, A. P., A. J. Veraart, P. A. Leffelaar, F. Berendse, and E. M. Veenendaal. 2011. Release of CO2 and CH4 from lakes and drainage ditches in temperate wetlands. Biogeochemistry 102: 265–279.
- Segers, R. 1998. Methane production and methane consumption: a review of processes underlying wetland methane fluxes. Biogeochemistry 41: 23–51.
- Selvam, P. B., S. Natchimuthu, L. Arunachalam, and D. Bastviken. 2014. Methane and carbon dioxide emissions from inland waters in India – implications for large scale greenhouse gas balances. Global Change Biology 11: 3397–3407.
- Shelley, F., J. Grey, and M. Trimmer. 2014. Widespread methanotrophic primary production in lowland chalk rivers. Proceedings of the Royal Society B: Biological Sciences 281: 20132854. doi:10.1098/rspb.2013.2854.
- Shelley, F., F. Abdullah, J. Grey, and M. Trimmer. 2015. Microbial methane cycling in the bed of a chalk river: oxidation has the potential to match methanogenesis enhanced by warming. Freshwater Biology 60: 150–160.
- Silvennoinen, H., A. Liikanen, J. Rintala, and P. J. Martikainen. 2008. Greenhouse gas fluxes from the eutrophic Temmesjoki River and its estuary in the Liminganlahti Bay (the Baltic Sea). Biogeochemistry 90: 193–208.
- Smemo, K. A., and J. B. Yavitt. 2011. Anaerobic oxidation of methane: an underappreciated aspect of methane cycling in peatland ecosystems? Biogeosciences 8: 779–793.
- Smith, S. V., W. H. Renwick, J. D. Bartley, and R. W. Buddemeier. 2002. Distribution and significance of small, artificial water bodies across the United States landscape. Science of the Total Environment 299: 21–36.
- Solomon, C. T., E. R. Hotchkiss, J. M. Moslemi, A. J. Ulseth, E. H. Stanley, R. O. Jr Hall, and A. S. Flecker. 2009. Sediment size and nutrients regulate denitrification in a tropical stream. Journal of the North American Benthological Society 28: 480–490.
- Song, C., G. Yang, D. Liu, and R. Mao. 2012. Phosphorus availability as a primary constraint on methane emission from a freshwater wetland. Atmospheric Environment 59: 202–206.
- Song, C., L. Wang, H. Tian, D. Liu, C. Lu, X. Xu, L. Zhang, G. Yang, and Z. Wan. 2013. Effect of continued nitrogen enrichment on greenhouse gas emissions from a wetland ecosystem in the Sanjiang Plain, Northeast China: a 5 year nitrogen addition experiment. Journal of Geophysical Research Biogeosciences 118: 741–751.
- Sponseller, R. A., J. Temnerud, K. Bishop, and H. Laudon. 2014. Patterns and drivers of riverine nitrogen (N) across alpine, subarctic, and boreal Sweden. Biogeochemistry 120: 105–120.
- Stanley, E., L. Loken, J. Crawford, N. Casson, S. Oliver, C. Gries, and S. Christel. 2015. A global database of methane concentrations and atmospheric fluxes for streams and rivers. Long Term Ecological Research Network https://portal.lternet.edu/nis/mapbrowse?packageid=knb-lter-ntl.321.5375841. doi:10.6073/pasta/21f5bd6642e9689baf90262f3c85ac4a.
10.6073/pasta/21f5bd6642e9689baf90262f3c85ac4a Google Scholar
- Stanley, E. H., and J. T. Maxted. 2008. Changes in the dissolved nitrogen pool across land cover gradients in Wisconsin streams. Ecological Applications 18: 1579–1590.
- Stanley, E. H., S. M. Powers, N. R. Lottig, I. Buffam, and J. T. Crawford. 2012. Contemporary changes in dissolved organic carbon of human-dominated rivers: is there a role for DOC management? Freshwater Biology 57: 26–42.
- St. Louis, V. L., C. A. Kelly, E. Duchemin, J. W. Rudd, and D. M. Rosenberg. 2000. Reservoir surfaces as sources of greenhouse gases to the atmosphere: a global estimate. BioScience 50: 766–775.
- Striegl, R. G., M. M. Dornblaser, C. P. McDonald, J. R. Rover, and E. G. Stets. 2012. Carbon dioxide and methane emissions from the Yukon River system. Global Biogeochemical Cycles 26: GB004306. doi:10.1111/gcb.12083.
- Swinnerton, J. W., V. J. Linnenbom, and C. H. Cheek. 1969. Distribution of methane and carbon monoxide between the atmosphere and natural waters. Environmental Science & Technology 3: 836–838.
- Tam, T.-Y., C. I. Mayfield, and W. E. Inniss. 1981. Nitrogen fixation and methane metabolism in a stream sediment-water system amended with leaf material. Canadian Journal of Microbiology 27: 511–516.
- Tamene, L., S. J. Park, R. Dikau, and P. L. G. Vlek. 2006. Reservoir siltation in the semi-arid highlands of Ethiopia: sediment yield-catchment area relationship and a semi-quantitative approach for predicting sediment yield. Earth Surface Processes and Landforms 31: 1364–1383.
- Tang, K. W., D. F. McGinnis, K. Frindte, V. Brüchert, and H. P. Grossart. 2014. Paradox reconsidered: methane oversaturation in well-oxygenated lake waters. Limnology and Oceanography 59: 275–284.
- Teodoru, C. R., F. C. Nyoni, A. V. Borges, F. Darchambeau, I. Nyambe, and S. Bouillon. 2015. Dynamics of greenhouse gases (CO2, CH4, N2O) along the Zambezi River and major tributaries, and their importance in the riverine carbon budget. Biogeosciences 12: 2431–2453.
- Townsend, C. R. 1989. The patch dynamics concept of stream community ecology. Journal of the North American Benthological Society 8: 36–50.
- Tranvik, L. J., et al. 2009. Lakes and reservoirs as regulators of carbon cycling and climate. Limnology and Oceanography 54: 2298–2314.
- Treat, C. C., W. M. Wollheim, R. K. Varner, A. S. Grandy, J. Talbot, and S. Frolking. 2014. Temperature and peat type control CO2 and CH4 production in Alaskan permafrost peats. Global Change Biology 20: 2674–2686.
- Trimmer, M., J. Grey, C. M. Heppell, A. G. Hildrew, K. Lansdow, H. Stahl, and G. Yvon-Durocher. 2012. River bed carbon and nitrogen cycling: state of play and some new directions. Science of the Total Environment 434: 143–158.
- Trimmer, M., A. G. Hildrew, M. C. Jackson, J. L. Pretty, and J. Grey. 2009. Evidence for the role of methane-derived carbon in a free-flowing, lowland river food web. Limnology and Oceanography 54: 1541–1547.
- Valett, H. M., F. R. Hauer, and J. A. Stanford. 2014. Landscape influences on ecosystem function: local and routing control of oxygen dynamics in a floodplain aquifer. Ecosystems 17: 195–211.
- Vannote, R. L., G. W. Minshall, K. W. Cummins, J. R. Sedell, and C. E. Cushing. 1980. The river continuum concept. Canadian Journal of Fisheries and Aquatic Sciences 37: 130–137.
- Venkiteswaran, J. J., S. L. Schiff, V. L. St Louis, C. J. Matthews, N. M. Boudreau, E. M. Joyce, K. G. Beaty, and R. A. Bodaly. 2013. Processes affecting greenhouse gas production in experimental boreal reservoirs. Global Biogeochemical Cycles 27: 567–577.
- Veraart, A. J., A. S. Steenbergh, A. Ho, S. Y. Kim, and P. L. E. Bodelier. 2015. Beyond nitrogen: the importance of phosphorus for CH4 oxidation in soils and sediments. Geoderma 259: 337–346. doi:10.1016/j.geoderma.2015.03.025.
- Vermaat, J. E., F. Hellmann, A. T. C. Dias, B. Hoorens, R. S. P. van Logtestijn, and R. Aerts. 2011. Greenhouse gas fluxes from Dutch peatland water bodies: importance of surrounding landscape. Wetlands 31: 493–498.
- Vörösmarty, C. J., et al. 2010. Global threats to human water security and river biodiversity. Nature 467: 555–561.
- Wallin, M. B., S. Löfgren, M. Erlandsson, and K. Bishop. 2014. Representative regional sampling of carbon dioxide and methane concentrations in hemiboreal headwater streams reveal underestimates in less systematic approaches. Global Biogeochemical Cycles 28: 465–479.
- Walter, K. M., L. C. Smith, and F. C. III Chapin. 2007. Methane bubbling from northern lakes: present and future contributions to the global methane budget. Philosophical Transactions: Mathematical, Physical and Engineering Sciences 365: 1657–1676.
- Wania, R., I. Ross, and C. Prentice. 2010. Implementation and evaluation of a new methane model within a dynamic global vegetation model: LPJ-WHyMe v1.3.1. Geoscientific Model Development 3: 565–584.
- Webb, B. W., D. M. Hannah, R. D. Moore, L. E. Brown, and F. Nobilis. 2008. Recent advances in stream and river temperature research. Hydrological Processes 22: 902–918.
- Werner, S. F., B. A. Browne, and C. T. Driscoll. 2012. Three-dimensional spatial patterns of trace gas concentrations in baseflow-dominated agricultural streams: implications for surface-ground water interactions and biogeochemistry. Biogeochemistry 107: 319–338.
- West, W. E., J. J. Coloso, and S. E. Jones. 2012. Effects of algal and terrestrial carbon on methane production rates and methanogen community structure in a temperate lake sediment. Freshwater Biology 57: 949–955.
- Whitfield, C. J., H. M. Baulch, K. P. Chun, and C. J. Westbrook. 2015. Beaver-mediated methane emission: the effects of population growth in Eurasia and the Americas. Ambio 44: 7–15.
- Wilcock, R. J., and B. K. Sorrell. 2008. Emissions of greenhouse gases CH4 and N2O from low-gradient streams in agriculturally developed catchments. Water Air and Soil Pollution 188: 155–170.
- Wilkniss, P. E., R. A. Lamontagne, R. E. Larson, and J. W. Swinnerton. 1978. Atmospheric trace gases and land and sea breezes at the Sepik River coast of Papua New Guinea. Journal of Geophysical Research: Oceans 83: 3672–3674.
- Wood, P. J., and P. D. Armitage. 1997. Biological effects of fine sediment in the lotic environment. Environmental Management 21: 203–217.
- Wu, L. C., C. B. Wei, S. S. Yang, T. H. Chang, H. W. Pan, and Y. C. Chung. 2007. Relationship between carbon dioxide/methane emissions and the water quality/sediment characteristics of Taiwan's main rivers. Journal of the Air and Waste Management Association 57: 319–327.
- Yang, L., X. Li, W. Yan, P. Ma, and J. Wange. 2012. CH4 concentrations and emissions from three rivers in the Chaohu Lake Watershed in southeast China. Journal of Integrative Agriculture 11: 665–673.
- Yang, S.-S., I.-C. Chen, C.-P. Liu, L.-Y. Liu, and C.-H. Chang. 2015. Carbon dioxide and methane emissions from Tanswei River in Northern Taiwan. Atmospheric Pollution Research 6: 52–61.
- Yavitt, J. B., G. E. Lang, and A. J. Sextone. 1990. Methane fluxes in wetland and forest soils, beaver ponds, and low-order streams of a temperate forest ecosystem. Journal of Geophysical Research 95: 22463–22474.
- Yavitt, J. B., L. L. Angell, T. J. Fahey, C. P. Cirmo, and C. T. Driscoll. 1992. Methane fluxes, concentrations, and production in two Adirondack beaver impoundments. Limnology and Oceanography 37: 1057–1066.
- Yvon-Durocher, G., J. M. Montoya, G. Woodward, J. I. Jones, and M. Trimmer. 2011. Warming increases the proportion of primary production emitted as methane from freshwater mesocosms. Global Change Biology 17: 1225–1234.
- Yvon-Durocher, G., A. P. Allen, D. Bastviken, R. Conrad, C. Gudasz, A. St-Pierre, N. Thanh-Duc, and P. A. del Giorgio. 2014. Methane fluxes show consistent temperature dependence across microbial to ecosystem scales. Nature 507: 488–491.
- Zaiss, U. P., and H. Kaltwasser. 1979. Über den Enflusse wasserbaulicher Massenahmen auf die mikrobiologische Gasproduktion in Fliessegwässer-sedimenten. Archiv für Hydrobiologie 87: 314–326.
- Zaiss, U., P. Winter, and H. Kaltwasser. 1982. Microbial methane oxidation in the River Saar. Zeitschrift für Allgemeine Mikrobiologie 22: 139–148.
- Zhu, T., D. Fu, C. T. Jafvert, and R. P. Singh. 2015. Modeling gas generation from the river adjacent to the manufactured gas plant. RSC Advances 5: 9565–9573.
- Zhu, Q., J. Liu, C. Peng, H. Chen, X. Fang, H. Jiang, G. Yang, D. Zhu, W. Wang, and X. Zhou. 2014. Modelling methane emissions from natural wetlands by development and application of the TRIPLEX-GHG model. Geoscientific Model Development 7: 981–999.