Phosphorus mitigation to control river eutrophication: Murky waters, inconvenient truths, and "postnormal" science

Journal of Environmental Quality

Volumn 42, Issue 2, 2013, Pages 295-304

  Jarvie, Helen P ^a,b   Sharpley, Andrew N ^b   Withers, Paul J A ^c   Scott, J Thad ^b   Haggard, Brian E ^b   Neal, Colin ^a  

^a CENTRE FOR ECOLOGY AND HYDROLOGY   (United Kingdom)

^b UNIVERSITY OF ARKANSAS   (United States)

^c BANGOR UNIVERSITY   (United Kingdom)

Author keywords

[No Author keywords available]

Indexed keywords

ALTERNATIVE STABLE STATE; ECOLOGICAL DEGRADATIONS; ECOSYSTEM FUNCTIONING; EUTROPHICATION CONTROL; LAND-USE MANAGEMENT; MANAGEMENT INTERVENTIONS; NUTRIENT MANAGEMENT; RIVER WATER QUALITY;

ECOSYSTEMS; EUTROPHICATION; LOADING; NUTRIENTS; PHOSPHORUS; RIVERS; WATER QUALITY;

RIVER POLLUTION;

PHOSPHORUS; FRESH WATER; NITROGEN; WATER;

ALGAL GROWTH; ARTICLE; BIODIVERSITY; EUTROPHICATION; LAND USE; REDUCTION; RIVER; WATER QUALITY; WATER SUPPLY; ECOSYSTEM;

ECOSYSTEM; EUTROPHICATION; FRESH WATER; NITROGEN; PHOSPHORUS; RIVERS; WATER;

EID: 84871335133     PISSN: 00472425     EISSN: 15372537     Source Type: Journal    
DOI: 10.2134/jeq2012.0085     Document Type: Article

References (127)

1. Allan, J.D., L.L. Yuan, P. Black, T. Stockton, P.E. Davies, R.H. Magierowski, and S.M. Read. 2012. Investigating the relationships between environmental stressors and stream condition using Bayesian belief networks. Freshwater Biol. 57:58-73. doi:10.1111/j.1365-2427.2011.02683.x
2. Bechmann, M., J. Deelstra, P. Stalnacke, H.O. Eggestad, L. Øygarden, and A. Pengerud. 2008. Monitoring catchment scale agricultural pollution in Norway: Policy instruments, implementation of mitigation methods and trends in nutrient and sediment losses. Environ. Sci. Policy 11:102-114. doi:10.1016/j. envsci.2007.10.005
3. Bernhardt, E.S., and M.A. Palmer. 2011. River restoration: Th e fuzzy logic of repairing reaches to reverse catchment scale degradation. Ecol. Appl. 21:1926-1931. doi:10.1890/10-1574.1
4. Bidwell, D. 2009. Is community-based participatory research postnormal science? Sci. Technol. Human Values 34:741-761 10.1177/0162243909340262. doi:10.1177/0162243909340262
5. Black, R.W., P.W. Moran, and J.D. Frankforter. 2011. Response of algal metrics to nutrients and physical factors and identifi cation of nutrient thresholds in agricultural streams. Environ. Monit. Assess. 175:397-417. doi:10.1007/s10661-010-1539-8
6. Bosch, N.S., T.H. Johengen, J.D. Allan, and G.W. Kling. 2009. Nutrient fl uxes across reaches and impoundments in two southeastern Michigan watersheds. Lake Reservior Manage. 25:389-400. doi:10.1080/07438140903238674
7. Bowes, M.J., N.L. Ings, S.J. McCall, A. Warwick, C. Barrett, H.D. Wickham, S.A. Harman, L.K. Armstrong, P.M. Scarlett, C. Roberts, K. Lehmann, and A.C. Singer. 2012. Nutrient and light limitation of periphyton in the River Th ames: Implications for catchment management. Sci. Total Environ. 434:201-212. doi:10.1016/j.scitotenv.2011.09.082
8. Bowes, M.J., J.T. Smith, C. Neal, D.V. Leach, P.M. Scarlett, H.D. Wickham, S.A. Harman, L.K. Armstrong, J. Davy-Bowker, M. Haft , and C.E. Davies. 2011. Changes in water quality of the River Frome (UK) from 1965 to 2009: Is phosphorus mitigation fi nally working? Sci. Total Environ. 409:3418-3430. doi:10.1016/j.scitotenv.2011.04.049
9. Cardinale, B.J., J.E. Duffy, A. Gonzalez, D.U. Hooper, C. Perrings, P. Venail, A. Narwani, G.M. Mace, D. Tilman, D.A. Wardle, A.P. Kinzig, G.C. Daily, M. Loreau, J.B. Grace, A. Larigauderie, D.S. Srivastava, and S. Naeem. 2012. Biodiversity loss and its impact on humanity. Nature 486:59-67. doi:10.1038/nature11148
10. Carpenter, S.R., D. Ludwig, and W.A. Brock. 1999. Management of eutrophication for lakes subject to potentially irreversible change. Ecol. Appl. 9:751-771. doi:10.1890/1051-0761(1999)009[0751:MOEFLS]2.0.CO;2
11. Carpenter, S.R., E.H. Stanley, and M.J. Van der Zanden. 2011. State of the world's freshwater ecosystems: Physical, chemical and biological changes. Annu. Rev. Environ. Resour. 36:75-99. doi:10.1146/annurev-environ-021810-094524
12. Cherry, K.A., M. Shepherd, P.J.A. Withers, and S.J. Mooney. 2008. Assessing the effectiveness of actions to mitigate nutrient loss from agriculture: A review of methods. Sci. Total Environ. 406:1-23. doi:10.1016/j.scitotenv.2008.07.015
13. Clements, W.H., N.K.M. Vieira, and D.L. Sonderegger. 2010. Use of ecological thresholds to assess recovery in lotic ecosystems. J. North Am. Benthol. Soc. 29:1017-1023. doi:10.1899/09-133.1
14. Copeland, C. 2010. Animal waste and water quality: EPA regulation of concentrated animal feeding operations (CAFOs). Congressional Research Service, Washington, DC. http://www.nationalaglawcenter.org/assets/crs/RL31851.pdf (accessed 6 Dec. 2012).
15. Daniel, T.C., A.N. Sharpley, D.R. Edwards, R. Wedepohl, and J.L. Lemunyon. 1994. Minimizing surface-water eutrophication from agriculture by phosphorus management. J. Soil Water Conserv. 49:30-38.
16. Davies, S.P., and S.K. Jackson. 2006. the biological condition gradient: A descriptive model for interpreting change in aquatic ecosystems. Ecol. Appl. 16:1251-1266. doi:10.1890/1051-0761(2006)016[1251:TBCGAD]2.0.CO;2
17. Dent, C.L., G.S. Cumming, and S.R. Carpenter. 2002. Multiple states in river and lake ecosystems. Philos. Trans. R. Soc. Lond. B Biol. Sci. 357:635-645 doi:10.1098/rstb.2001.0991.
18. Dodds, W.K. 2003. Misuse of inorganic N and soluble reactive P concentrations to indicate nutrient status of surface waters. J. North Am. Benthol. Soc. 22:171-181. doi:10.2307/1467990
19. Dodds, W.K. 2006. Eutrophication and trophic state in rivers and streams. Limnol. Oceanogr. 51:671-680. doi:10.4319/lo.2006.51.1_part_2.0671
20. Dodds, W.K. 2007. Trophic state, eutrophication, and nutrient criteria in streams. Trends Ecol. Evol. 22:669-676. doi:10.1016/j.tree.2007.07.010
21. Dodds, W.K., W.H. Clements, K. Gido, R.H. Hilderbrand, and R.S. King. 2010. Th resholds, breakpoints, and nonlinearity in freshwaters as related to management. J. North Am. Benthol. Soc. 29:988-997. doi:10.1899/09-148.1
22. Dodds, W.K., and R.M. Oakes. 2004. A technique for establishing reference nutrient concentrations across watersheds affected by humans. Limnol. Oceanogr. Methods 2:333-341. doi:10.4319/lom.2004.2.333
23. Dodds, W.K., and E.B. Welch. 2000. Establishing nutrient criteria in streams. J. North Am. Benthol. Soc. 19:186-196. doi:10.2307/1468291
24. Duarte, C.M., D.J. Conley, J. Carstensen, and M. Sanchez-Camacho. 2009. Return to Neverland: Shift ing baselines affect eutrophication restoration targets. Estuaries Coasts 32:29-36. doi:10.1007/s12237-008-9111-2
25. Dunne, E.J., M.W. Clark, R. Corstanje, and K.R. Reddy. 2011. Legacy phosphorus in subtropical wetland soils: Infl uence of dairy, improved and unimproved pasture land use. Ecol. Eng. 37:1481-1491. doi:10.1016/j.ecoleng.2011.04.003
26. Edwards, A.C., and P.J.A. Withers. 2007. Linking phosphorus sources to impacts in different types of waterbody. Soil Use Manage. 23(Supplement 1):133-143. doi:10.1111/j.1475-2743.2007.00110.x
27. Ekka, S.A., B.E. Haggard, M.D. Matlock, and I. Chaubey. 2006. Dissolved phosphorus concentrations and sediment interactions in effl uent-dominated Ozark streams. Ecol. Eng. 26:375-391. doi:10.1016/j.ecoleng.2006.01.002
28. Evans-White, M.A., W.K. Dodds, D. Huggins, and D. Baker. 2009. Th resholds in macroinvertebrate biodiversity and stoichiometry across water-quality gradients in Central Plains lotic systems. J. North Am. Benthol. Soc. 28:855-868. doi:10.1899/08-113.1
29. French, T.D., and E.L. Petticrew. 2007. Chlorophyll a seasonality in four shallow eutrophic lakes (northern British Columbia, Canada) and the critical roles of internal phosphorus loading and temperature. Hydrobiologia 575:285-299. doi:10.1007/s10750-006-0377-8
30. Frossard, E., E. Bunermann, J. Jansa, A. Oberson, and C. Feller. 2009. Concepts and practices of nutrient management in agro-ecosystems: Can we draw lessons from history to design future sustainable agricultural production systems?. Bodenkultur 60(1):43-60.
31. Fryirs, K., and G. Brierley. 2000. A geomorphic approach to the identification of river recovery potential. Phys. Geog. 21:244-277.
32. Funtowicz, S.O., and J.R. Ravetz. 1993. Science for the post normal age. Futures 25:739-755. doi:10.1016/0016-3287(93)90022-L
33. Gassman, P.W., J.A. Tisl, E.A. Palas, C.L. Fields, T.M. Isenhart, K.E. Schilling, C.F. Wolter, L.S. Seigley, and M.J. Helmers. 2010. Conservation practice establishment in two northeast Iowa watersheds: Strategies, water quality implications, and lessons learned. J. Soil Water Conserv. 65:381-392. doi:10.2489/jswc.65.6.381
34. Gibson, G.R., R. Carlson, J. Simpson, E. Smeltzer, J. Gerritson, S. Chapra, S. Heiskary, J. Jones, and R. Kennedy. 2000. Nutrient criteria technical guidance manual: Lakes and reservoirs. EPA-822-B00-001. U.S. Gov. Print. Office, Washington, DC. Gordon, L.J., G.D. Peterson, and E.M. Bennett. 2008. Agricultural modifications of hydrologica; fl ows create ecological surprises. Trends Ecol. Evol. 23:211-219.
35. Groffman, P., J. Baron, T. Blett, A. Gold, I. Goodman, L. Gunderson, B. Levinson, M. Palmer, H. Paerl, G. Peterson, N. Poff, D. Rejeski, J. Reynolds, M. Turner, K. Weathers, and J. Wiens. 2006. Ecological thresholds: the key to successful environmental management or an important concept with no practical application? Ecosystems 9:1-13. doi:10.1007/s10021-003-0142-z
36. Gunderson, L., and S.S. Light. 2006. Adaptive management and adaptive governance in the Everglades ecosystem. Policy Sci. 39:323-334. doi:10.1007/s11077-006-9027-2
37. Haggard, B.E. 2010. Phosphorus concentrations, loads, and sources within the Illinois River drainage area, northwest Arkansas, 1997-2008. J. Environ. Qual. 39:2113-2120. doi:10.2134/jeq2010.0049
38. Haggard, B.E., and J.T. Scott. 2011. Water quality standards: Designated uses and numeric criteria development. In Y. Li and K. Migliaccio, editors, Water quality concepts, sampling, and analysis. CRC Press, Boca Raton, FL.
39. Haggard, B.E., J.T. Scott, S.D. Longing, and J.T. Metrailer. 2012. Sestonic chlorophyll-a and nutrient relationships across the Red River Basin, USA. Arkansas Water Resources Center Technical Publ. Series MSC 366. http://www.uark.edu/depts/awrc/pdf_files/MSC/MSC_366.pdf.
40. Haggard, B.E., and T.S. Soerens. 2006. Sediment phosphorus release at a small impoundment on the Illinois River, Arkansas and Oklahoma, USA. Ecol. Eng. 28:280-287. doi:10.1016/j.ecoleng.2006.07.013
41. Haggard, B.E., E.H. Stanley, and D.E. Storm. 2005. Nutrient retention in a point-source-enriched stream. J. North Am. Benth. Soc. 24:29-47. doi:10.1899/0887-3593(2005)024<0029:NRIAPS>2.0.CO;2
42. Hamilton, S.K. 2012. Biogeochemical time lags may delay responses of streams to ecological restoration. Freshw. Biol. doi:10.1111/j.1365-2427.2011.02685.x.
43. Harpole, W.S., J.T. Ngai, E.E. Cleland, E.W. Seabloom, E.T. Borer, M.E.S. Bracken, J.J. Elser, D.S. Gruner, H. Hillebrand, J.B. Shurin, and J.E. Smith. 2011. Nutrient co-limitation of primary producer communities. Ecol. Lett. 14:852-862. doi:10.1111/j.1461-0248.2011.01651.x
44. Harris, G.P. 2012. Introduction to the special issue: "Achieving ecological outcomes." Why is translational ecology so difficult? Freshw. Biol. 57:1-6. doi:10.1111/j.1365-2427.2012.02773.x
45. Harris, G.P., and A.L. Heathwaite. 2012. Why is achieving good ecological outcomes in rivers so difficult? Freshw. Biol. 57:91-107. doi:10.1111/j.1365-2427.2011.02640.x
46. Haygarth, P.M., T.J.C. Page, K.J. Beven, J. Freer, A. Joynes, P. Butler, G.A. Wood, and P.N. Owens. 2012. Scaling up the phosphorus signal from soil hillslopes to headwater catchments. Freshw. Biol. 57:7-25. doi:10.1111/j.1365-2427.2012.02748.x
47. Hering, D., R.K. Johnson, S. Kramm, S. Schnutz, K. Szoszkiewicz, and P.F.M. Verdonschot. 2006. Assessment of European streams with diatoms, macrophytes, macroinvertebrates, and fish: A comparative metric-based analysis of organism response to stress. Freshw. Biol. 51:1757-1785. doi:10.1111/j.1365-2427.2006.01610.x
48. Holmes, J., and R. Clark. 2008. Enhancing use of science in environmental policymaking and regulation. Environ. Sci. Policy 11:702-711. doi:10.1016/j. envsci.2008.08.004
49. Hughes, R.M., D.P. Larsen, and J.M. Omernik. 1986. Regional reference sites: A method for assessing stream potentials. Environ. Manage. 19:629-635. doi:10.1007/BF01866767
50. Ibelings, B.W., R. Portielje, E.H.R.R. Lammens, R. Noordhuis, M.S. van den Berg, W. Joosse, and M.L. Meijer. 2007. Resilience of alternative stable states during the recovery of shallow lakes from eutrophication: Lake Veluwe as a case study. Ecosystems 10:4-16. doi:10.1007/s10021-006-9009-4
51. Jarvie, H.P., T.D. Jickells, R.A. Skeffington, and P.J.A. Withers. 2012a. Climate change and coupling of macronutrient cycles along the atmospheric, terrestrial, freshwater and estuarine continuum. Sci. Total Environ. 434:252-258. doi:10.1016/j.scitotenv.2012.07.051
52. Jarvie, H.P., M.D. Juergens, R.J. Williams, C. Neal, J.J.L. Davies, C. Barrett, and J. White. 2005. Role of river bed sediments as sources and sinks of phosphorus across two major eutrophic UK river basins: the Hampshire Avon and Herefordshire Wye. J. Hydrol. 304:51-74. doi:10.1016/j.jhydrol.2004.10.002
53. Jarvie, H.P., C. Neal, M.D. Juergens, E.J. Sutton, M. Neal, H.D. Wickham, L.K. Hill, S.A. Harman, J.J.L. Davies, A. Warwick, C. Barrett, J. Griffiths, A. Binley, N. Swannack, and N. McIntyre. 2006. Within-river nutrient processing in Chalk streams: the Pang and Lambourn, UK. J. Hydrol. 330:101-125. doi:10.1016/j.jhydrol.2006.04.014
54. Jarvie, H.P., C. Neal, and R.J. Williams. 2004. Assessing changes in phosphorus concentrations in relation to in-stream plant ecology in lowland permeable catchments: Bringing ecosystem functioning into water quality monitoring. Water Air Soil Pollut. Focus 4:641-655. doi:10.1023/B:WAFO.0000028384.30561.36
55. Jarvie, H.P., A.N. Sharpley, J.T. Scott, B.E. Haggard, L. Massey, and M.J. Bowes. 2012b. Within-river phosphorus retention: Accounting for a missing piece in the watershed phosphorus puzzle. Environ. Sci. Technol. 46:13284-13292. doi:10.1021/es303562y
56. Jeppesen, E., M. Sondergaard, M. Meerhoff, T.L. Lauridsen, and J.P. Jensen. 2007. Shallow lake restoration by nutrient loading reduction: Some recent findings and challenges ahead. Hydrobiologia 584:239-252. doi:10.1007/s10750-007-0596-7
57. Johnson, A.C., M.C. Acreman, M.J. Dunbar, S.W. Feist, A.M. Giacomello, R.E. Gozlan, S.A. Hinsley, A.T. Ibbotson, H.P. Jarvie, J.I. Jones, M. Longshaw, S.C. Maberly, T.J. Marsh, C. Neal, J.R. Newman, M.A. Nunn, R.W. Pickup, N.S. Reynard, C.A. Sullivan, J.P. Sumpter, and R.J. Williams. 2009. the British river of the future: How climate change and human activity might affect two contrasting river ecosystems in England. Sci. Total Environ. 407:4787-4798. doi:10.1016/j.scitotenv.2009.05.018
58. Joosse, P.J., and D.B. Baker. 2011. Context for re-evaluating agricultural source phosphorus loadings to the Great Lakes. Can. J. Soil Sci. 91:317-327. doi:10.4141/cjss10005
59. Jordan, N.R., C.S. Slotterback, K.V. Cadieux, D.J. Mulla, D.G. Pitt, L.S. Olabisi, and J.-O. Kim. 2011. TMDL implementation in agricultural landscapes: A communicative and systemic approach. Environ. Manage. 48:1-12. doi:10.1007/s00267-011-9647-y
60. Kelly, M., S. Juggins, R. Guthrie, S. Pritchard, J. Jamieson, B. Rippey, H. Hirst, and M. Yallop. 2008. Assessment of ecological status in UK rivers using diatoms. Freshw. Biol. 53:403-422. doi:10.1111/j.1365-2427.2007.01903.x.
61. Kelly, M.G., and S. Wilson. 2004. Effect of phosphorus stripping on water chemistry and diatom ecology in an eastern lowland river. Water Res. 38:1559-1567. doi:10.1016/j.watres.2003.12.022
62. Kirchner, J.W., X.H. Feng, and C. Neal. 2000. Fractal stream chemistry and its implications for contaminant transport in catchments. Nature 403:524-527. doi:10.1038/35000537
63. Kleinman, P.J.A., A.L. Allen, B.A. Needelman, A.N. Sharpley, P.A. Vadas, L.S. Saporito, G.J. Folmar, and R.B. Bryant. 2007. Dynamics of phosphorus transfers from heavily manured Coastal Plain soils to drainage ditches. J. Soil Water Conserv. 62:225-235.
64. Kleinman, P.J.A., A.N. Sharpley, A.R. Buda, R.W. McDowell, and A.L. Allen. 2011. Soil controls of phosphorus in runoff: Management barriers and opportunities. Can. J. Soil Sci. 91:329-338. doi:10.4141/cjss09106
65. Kohler, T.J., J.N. Murdock, K.B. Gido, and W.K. Dodds. 2011. Nutrient loading and grazing by the minnow Phoxinus erythrogaster shift periphyton abundance and stoichiometry in mesocosms. Freshw. Biol. 56:1133-1146. doi:10.1111/j.1365-2427.2010.02557.x
66. Kronvang, B., M. Bechmann, H. Lundekvam, H. Behrendt, G.H. Rubaek, O.F. Schoumans, N. Syversen, H.E. Andersen, and C.C. Hoffmann. 2005a. Phosphorus losses from agricultural areas in river basins: Effects and uncertainties of targeted mitigation measures. J. Environ. Qual. 34:2129-2144. doi:10.2134/jeq2004.0439
67. Kronvang, B., E. Jeppesen, D.J. Conley, M. Sondergaard, S.E. Larsen, B. Ovesen, and J. Carstensen. 2005b. Nutrient pressures and ecological responses to nutrient loading reductions in Danish streams, lakes and coastal waters. J. Hydrol. 304:274-288. doi:10.1016/j.jhydrol.2004.07.035
68. Lamon, E.C., III, and S.S. Qian. 2008. Regional scale stressor-response models in aquatic ecosystems. J. Am. Water Resour. Assoc. 44:771-781. doi:10.1111/j.1752-1688.2008.00205.x
69. Lemke, A.M., K.G. Kirkham, T.T. Lindenbaum, M.E. Herbert, T.H. Tear, W.L. Perry, and J.R. Herkert. 2011. Evaluating agricultural best management practices in tile-drained subwatersheds of the Mackinaw River, Illinois. J. Environ. Qual. 40:1215-1228. doi:10.2134/jeq2010.0119
70. Longing, S.D., and B.E. Haggard. 2010. Distributions of median nutrient and cholorophyll concentrations across the Red River Basin, USA. J. Environ. Qual. 39:1966-1974. doi:10.2134/jeq2009.0235
71. Maguire, R.O., G.H. Rubaek, B.E. Haggard, and B.H. Foy. 2009. Critical evaluation of the implementation of mitigation options for phosphorus from field to catchment scales. J. Environ. Qual. 38:1989-1997. doi:10.2134/jeq2007.0659
72. Maresch, W., M.R. Walbridge, and D. Kugler. 2008. Enhancing conservation on agricultural landscapes: A new direction for the Conservation Effects Assessment Project. J. Soil Water Conserv. 63:198A-203A. doi:10.2489/jswc.63.6.198A
73. Maret, T.R., C.P. Konrad, and A.W. Tranmer. 2010. Infl uence of environmental factors on biotic responses to nutrient enrichment in agricultural streams. J. Am. Water Resour. Assoc. 46:498-513. doi:10.1111/j.1752-1688.2010.00430.x.
74. Mateo, P., I. Douterelo, E. Berrendero, and E. Perona. 2006. Physiological differences between two species of cyanobacteria in relation to phosphorus limitation. J. Phycol. 42:61-66. doi:10.1111/j.1529-8817.2006.00180.x
75. May, L., L.H. Defew, H. Bennion, and A. Kirika. 2012. Historical changes (1905-2005) in external phosphorus loads in Loch Leven, Scotland, UK. Hydrobiologia 681:11-21. doi:10.1007/s10750-011-0922-y
76. Meals, D.W., S.A. Dressing, and T.E. Davenport. 2010. Lag time in water quality response to best management practices: A review. J. Environ. Qual. 39:85-96. doi:10.2134/jeq2009.0108
77. Millennium Ecosystem Assessment. 2005. Ecosystems and human well-being: Conditions and trends. World Resources Institute, Washington, DC. Moss, B. 2008. Water pollution by agriculture. Philos. Trans. R. Soc. Lond. B Biol. Sci. 363:659-666.
78. Moss, B. 2008. Water pollution by agriculture. Philos. Trans. R. Soc. Lond. B Biol. Sci. 363:659-666.
79. Mulla, D.J., A.S. Birr, N.R. Kitchen, and M.B. David. 2008. Limitations of evaluating the effectiveness of agricultural management practices at reducing nutrient losses to surface waters. Am. Soc. Agric. Biol. Eng., St. Joseph, MI.
80. Munn, M., J. Frey, and A. Tesoriero. 2010. the infl uence of nutrients and physical habitat in regulating algal biomass in agricultural streams. Environ. Manage. 45:603-615. doi:10.1007/s00267-010-9435-0
81. Murdock, J.N., W.K. Dodds, K.B. Gido, and M.R. Whiles. 2011. Dynamic infl uences of nutrients and grazing fish on periphyton during recovery from fl ood. J. North Am. Benthol. Soc. 30:331-345. doi:10.1899/10-039.1
82. Neal, C., J. Hilton, A.J. Wade, M. Neal, and H. Wickham. 2006. Chlorophyll-a in the rivers of eastern England. Sci. Total Environ. 365:84-104. doi:10.1016/j. scitotenv.2006.02.039
83. Neal, C., H.P. Jarvie, R. Williams, A. Love, M. Neal, H. Wickham, S. Harman, and L. Armstrong. 2010a. Declines in phosphorus concentration in the upper River Th ames (UK): Links to sewage effl uent cleanup and extended endmember mixing analysis. Sci. Total Environ. 408:1315-1330. doi:10.1016/j. scitotenv.2009.10.055
84. Neal, C., E. Martin, M. Neal, J. Hallett, H.D. Wickham, S.A. Harman, L.K. Armstrong, M.J. Bowes, A.J. Wade, and D. Keay. 2010b. Sewage effl uent cleanup reduces phosphorus but not phytoplankton in lowland chalk stream (River Kennet, UK) impacted by water mixing from adjacent canal. Sci. Total Environ. 408:5306-5316. doi:10.1016/j.scitotenv.2010.08.010
85. Ormerod, S.J., M. Dobson, A.G. Hildrew, and C.R. Townsend. 2010. Multiple stressors in freshwater ecosystems. Freshw. Biol. 55:1-4. doi:10.1111/j.1365-2427.2009.02395.x
86. Paerl, H.W. 2009. Controlling eutrophication along the freshwater-marine continuum: Dual nutrient (N and P) reductions are essential. Estuaries Coasts 32:593-601. doi:10.1007/s12237-009-9158-8
87. Paine, A.D.M. 1985. Ergodic reasoning in geomorphology: Time for a review of the term. Prog. Phys. Geogr. 9:1-15. doi:10.1177/030913338500900101.
88. Palmer, M., J.D. Allan, J. Meyer, and E.S. Bernhardt. 2007. River restoration in the twenty-first century: Data and experiential future efforts. Restor. Ecol. 15:472-481. doi:10.1111/j.1526-100X.2007.00243.x
89. Palmer, M.A., and C.M. Febria. 2012. the heartbeat of ecosystems. Science 336:1393-1394. doi:10.1126/science.1223250
90. Petersen, A.C., A. Cath, M. Hage, E. Kunseler, and J.P. van der Sluijs. 2011. Post-normal science in practice at the Netherlands Environmental Assessment Agency. Sci. Technol. Human Values 36:362-388. doi:10.1177/0162243910385797
91. Pimm, S.L. 1991. the balance of nature? Ecological issues in the conservation of species and communities. University of Chicago Press, Chicago, IL.
92. Poole, G.C., J.B. Dunham, D.M. Keenan, S.T. Sauter, D.A. McCullough, C. Mebane, J.C. Lockwood, D.A. Essig, M.P. Hicks, D.J. Sturdevant, E.J. Materna, S.A. Spalding, J. Risley, and M. Deppman. 2004. the case for regime-based water quality standards. Bioscience 54:155-161. doi:10.1641/0006-3568(2004)054[0155:TCFRWQ]2.0.CO;2
93. Portielje, R., and L. Lijklema. 1994. Kinetics of luxury uptake of phosphate by algae-dominated benthic communities. Hydrobiologia 275-276:349-358. doi:10.1007/BF00026725
94. Ravetz, J. 2004. the post-normal science of precaution. Futures 36:347-357. doi:10.1016/S0016-3287(03)00160-5
95. Reckhow, K.H., P.E. Norris, R.J. Budell, D.M. Di Toro, J.N. Galloway, H. Greening, A.N. Sharpley, A. Shirmhhammadi, and P.E. Stacey. 2011. Achieving nutrient and sediment reduction goals in the Chesapeake Bay: An evaluation of program strategies and implementation. the National Academies Press, Washington, DC.
96. Reynolds, C.S., and P.S. Davies. 2001. Sources and bioavailability of phosphorus fractions in freshwaters: A British perspective. Biol. Rev. Camb. Philos. Soc. 76:27-64. doi:10.1017/S1464793100005625
97. Richards, R.P., D.B. Baker, and J.P. Crumrine. 2009. Improved water quality in Ohio tributaries to Lake Erie: A consequence of conservation practices. J. Soil Water Conserv. 64:200-211. doi:10.2489/jswc.64.3.200
98. Ryder, C., and C. Bennett. 2010. the River Basin Districts typology, standards and groundwater threshold values (Water Framework Directive) (England and Wales) Directions 2010. Department for Environment, Food and Rural Affairs, London.
99. Scheffer, M., and S.R. Carpenter. 2003. Catastrophic regime shift s in ecosystems: Linking theory to observation. Trends Ecol. Evol. 18:648-656. doi:10.1016/j. tree.2003.09.002
100. Schulte, R.P.O., A.R. Melland, O. Fenton, M. Herlihy, K. Richards, and P. Jordan. 2010. Modelling soil phosphorus decline: Expectations of Water Framework Directive policies. Environ. Sci. Policy 13:472-484. doi:10.1016/j. envsci.2010.06.002
101. Scott, J.T., B.E. Haggard, A.N. Sharpley, and J.J. Romeis. 2011. Change point analysis of phosphorus trends in the Illinois River (Oklahoma) demonstrates the effects of watershed management. J. Environ. Qual. 40:1249-1256. doi:10.2134/jeq2010.0476
102. Seitzinger, S.P., E. Mayorga, A.F. Bouwman, C. Kroeze, A.H.W. Beusen, G. Billen, G. Van Drecht, E. Dumont, B.M. Fekete, J. Garnier, and J.A. Harrison. 2010. Global river nutrient export: A scenario analysis of past and future trends. Global Biogeochem. Cycles 24:GB0A08. doi:10.1029/2009GB003587
103. Seo, D.I. 1999. Analysis of sediment characteristics and total phosphorus models for Shagawa Lake. J. Environ. Eng. 125:346-350. doi:10.1061/(ASCE)0733-9372(1999)125:4(346)
104. Sharpley, A.N., S.C. Chapra, R. Wedepohl, J.T. Sims, T.C. Daniel, and K.R. Reddy. 1994. Managing agricultural phosphorus for protection of surface waters-issues and options. J. Environ. Qual. 23:437-451. doi:10.2134/jeq1994.00472425002300030006x
105. Sharpley, A.N., M.J. Cochran, M.B. Daniels, B.E. Haggard, M. Matlock, T. Riley, and D. Saraswat. 2011a. the role on non-point source models in watershed management. Univ. of Arkansas Division of Agriculture, Public Policy Center. Publ. FSPPC112-7-11N. http://www.uaex.edu/Other_Areas/publications/PDF/MP487.pdf (accessed 4 Dec. 2011).
106. Sharpley, A.N., P.J.A. Kleinman, D.N. Flaten, and A.R. Buda. 2011b. Critical source area management of agricultural phosphorus: Experiences, challenges, and opportunities. Water Sci. Technol. 64:945-952. doi:10.2166/wst.2011.712
107. Sharpley, A.N., P.J.A. Kleinman, P. Jordan, L. Bergstrom, and A.L. Allen. 2009. Evaluating the success of phosphorus management from field to watershed. J. Environ. Qual. 38:1981-1988. doi:10.2134/jeq2008.0056
108. Silberstein, R.P. 2006. Hydrological models are so good, do we still need data? Environ. Model. Soft w. 21:1340-1352. doi:10.1016/j.envsoft.2005.04.019
109. Smith, A.J., and C.P. Tran. 2010. A weight-of-evidence approach to define nutrient criteria protective of aquatic life in large rivers. J. North Am. Benthol. Soc. 29:875-891. doi:10.1899/09-076.1
110. Smith, V.H., and D.W. Schindler. 2009. Eutrophication science: Where do we go from here? Trends Ecol. Evol. 24:201-207 10.1016/j.tree.2008.11.009. doi:10.1016/j.tree.2008.11.009
111. Soranno, P.A., T. Wagner, S.L. Martin, C. McLean, L.N. Novitski, C.D. Provence, and A.R. Rober. 2011. Quantifying regional reference conditions for freshwater ecosystem management: A comparison of approaches and future research needs. Lake Reservoir Manage. 27:138-148. doi:10.1080/07438141.2011.573614.
112. Stevenson, R.J., B.H. Hill, A.T. Herlihy, L.L. Yuan, and S.B. Norton. 2008. Algae-P relationships, thresholds, and frequency distributions guide nutrient criterion development. J. North Am. Benthol. Soc. 27:783-799. doi:10.1899/07-077.1
113. Stevenson, R.J., S.T. Rier, C.M. Riseng, R.E. Schultz, and M.J. Wiley. 2006. Comparing effects of nutrients on algal biomass in streams in two regions with different disturbance regimes and with applications for developing nutrient criteria. Hydrobiologia 561:149-165. doi:10.1007/s10750-005-1611-5
114. Stutter, M.I., B.O.L. Demars, and S.J. Langan. 2010. River phosphorus cycling: Separating biotic and abiotic uptake during short-term changes in sewage effl uent loading. Water Res. 44:4425-4436. doi:10.1016/j.watres.2010.06.014
115. Suplee, M.W., A. Varghese, and J. Cleland. 2007. Developing nutrient criteria for streams: An evaluation of the frequency distribution method. J. Am. Water Resour. Assoc. 43:453-472. doi:10.1111/j.1752-1688.2007.00036.x
116. Triska, F.J., J.H. Duff, and R.J. Avanzino. 1993. Patterns of hydrological exchange and nutrient transformation in the hyporheic zone of a gravel-bottom stream-examining terrestrial aquatic linkages. Freshw. Biol. 29:259-274. doi:10.1111/j.1365-2427.1993.tb00762.x
117. U. S. Environmental Protection Agency. 2000. Ecoregional nutrient criteria documents: Rivers and streams. U.S. Environmental Protection Agency, Washington, DC. http://www.epa.gov/waterscience/criteria/nutrient/ecoregions/rivers/index.html (accessed 4 Dec. 2011).
118. U.S. Environmental Protection Agency. 2008. Handbook for developing watershed TMDLs. EPA-822-F-01-010. USEPA, Office of Water (4304), U.S. Gov. Printing Off., Washington, DC. http://water.epa.gov/lawsregs/lawsguidance/cwa/tmdl/upload/tmdl-sw_permits11172008.pdf (accessed 4 Dec. 2007).
119. U.S. Environmental Protection Agency. 2010. Review of empirical approaches for nutrient criteria development. USEPA Scientific Advisory Board, Washington, DC. http://yosemite.epa.gov/sab/sabproduct.nsf/95eac6037dbee075852573a00075f732/E09317EC14CB3F2B85257713004BED5F/$File/EPA-SAB-10-006-unsigned.pdf (accessed 1 Dec. 2011.
120. Wade, A.J., G.M. Hornberger, P.G. Whitehead, H.P. Jarvie, and N. Flynn. 2001. On modeling the mechanisms that control in-stream phosphorus, macrophyte, and epiphyte dynamics: An assessment of a new model using general sensitivity analysis. Water Resour. Res. 37:2777-2792. doi:10.1029/2000WR000115
121. Wall, D., P. Jordan, A.R. Melland, P.-E. Mellander, C. Buckley, S.M. Reaney, and G. Shortle. 2011. Using the nutrient transfer continuum concept to evaluate the European Union Nitrates Directive National Action Programme. Environ. Sci. Policy 14:664-674. doi:10.1016/j.envsci.2011.05.003
122. Withers, P.J.A., and R.A. Hodgkinson. 2009. the effect of farming practices on phosphorus transfer to a headwater stream in England. Agric. Ecosyst. Environ. 131:347-355. doi:10.1016/j.agee.2009.02.009
123. Withers, P.J.A., H. Hartikainen, E. Barberis, N.J. Flynn, and G.P. Warren. 2009a. the effect of soil phosphorus on particulate phosphorus in land runoff. Eur. J. Soil Sci. 60:994-1004. doi:10.1111/j.1365-2389.2009.01161.x
124. Withers, P.J.A., and H.P. Jarvie. 2008. Delivery and cycling of phosphorus in UK rivers: Implications for catchment management. Sci. Total Environ. 400:379-395. doi:10.1016/j.scitotenv.2008.08.002
125. Withers, P.J.A., H.P. Jarvie, R.A. Hodgkinson, E.J. Palmer-Felgate, A. Bates, M. Neal, R. Howells, C.M. Withers, and H.D. Wickham. 2009b. Characterization of phosphorus sources in rural watersheds. J. Environ. Qual. 38:1998-2011. doi:10.2134/jeq2008.0096
126. Woodward, G., M.O. Gessner, P.S. Giller, V. Gulis, S. Hladyz, A. Lecerf, B. Malmqvist, B.G. McKie, S.D. Tiegs, H. Cariss, M. Dobson, A. Elosegi, V. Ferreira, M.A.S. Graca, T. Fleituch, J.O. Lacoursiere, M. Nistorescu, J. Pozo, G. Risnoveanu, M. Schindler, A. Vadineanu, L.B.M. Vought, and E. Chauvet. 2012. Continentalscale effects of nutrient pollution on stream ecosystem functioning. Science 336:1438-1440. doi:10.1126/science.1219534
127. Zhang, T.Q., A.F. MacKenzie, B.C. Liang, and C.F. Drury. 2004. Soil test phosphorus and phosphorus fractions with long-term phosphorus addition and depletion. Soil Sci. Soc. Am. J. 68:519-528. doi:10.2136/sssaj2004.0519