Abstract
This study documents regional patterns in stream nitrogen and phosphorus concentrations in the Brazilian state of Rondônia in the southwestern Amazon basin, and interprets the patterns as functions of watershed soil properties, deforestation extent, and urban population density. The survey includes 77 different locations sampled in the dry and wet seasons, with a watershed size range from 1.8 to 33,000 km2 over a total area of approximately 140,000 km2. A sequential regression technique is used to separate the effects of natural watersheds properties and anthropogenic disturbance on nutrients and chloride. Natural variation in soil texture explains most of the variance in stream nitrate concentrations, while deforestation extent and urban population density explain most of the variance in stream chloride (Cl) and total dissolved nitrogen (TDN) concentrations. Stream TDN, total dissolved phosphorus (TDP), particulate phosphorus (PP) and Cl concentrations all increase non-linearly with deforestation extent in the dry season after controlling for natural variability due to soil type. Stream nutrient and Cl disturbances are observed only in watersheds more than 66–75% deforested (watershed area range 2–300 km2), suggesting stream nutrient concentrations are resistant to perturbation from vegetation conversion below a 66–75% threshold. In heavily deforested watersheds, stream Cl shows the largest changes in concentration (12 ± 6 times forested background), followed by TDP (2.3 ± 1.5), PP (1.9 ± 0.8) and TDN (1.7 ± 0.5). Wet season signals in Cl and TDP are diluted relative to the dry season, and no land use signal is observed in wet season TDN, PN, or PP. Stream TDN and TDP concentrations in non-urban watersheds both correlate with stream Cl, suggesting that sources other than vegetation and soil organic matter contribute to enhanced nutrient concentrations. Small, urbanized watersheds (5–20 km2) have up to 40 times the chloride and 10 times the TDN concentrations of forested catchments in the dry season. Several large watersheds (∼1000–3000 km2) with urban populations show higher Cl, TDN and TDP levels than any small pasture watershed, suggesting that human impacts on nutrient concentrations in large river systems may be dominated by urban areas. Anthropogenic disturbance of dry-season stream Cl and TDN is detectable in large streams draining deforested and urbanized watersheds up to 33,000 km2. We conclude that regional deforestation and urbanization result in changes in stream Cl, N and P concentrations at wide range of scales, from small pasture streams to large river systems.
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References
Aitkenhead J.A. and McDowell W.H. 2000. Soil C:N as a predictor of annual riverine DOC flux at local and global scales. Global Biogeochem. Cycles 14: 127-138.
Alexander R.B., Elliott A.H., Shankar U. and McBride G.B. 2002a. Estimating the sources and transport of nutrients in the Waikato River Basin, New Zealand. Water Resour. Res. 38: art.no. 1268.
Alexander R.B., Johnes P.J., Boyer E.W. and Smith R.A. 2002b. A comparison of models for estimating the riverine export of nitrogen from large watersheds. Biogeochemistry 57: 295-339.
Avnimelech Y. and Raveh J. 1976. Nitrate leakage from soils differing in texture and nitrogen load. J. Environ. Qual. 5: 79-82.
Beaulac M.N. and Reckhow K.H. 1982. An examination of land use-nutrient export relationships. Water Ressour. Bull. 18: 1013-1024.
Bettencourt J.S., Tosdal R.M., Leite Jr. W.B. and Payolla B.L. 1999. Mesoproterozoic rapakivi granites of the Rondônian Tin Province, southwestern border of the Amazonian craton, Brazil. I. Reconnaissance U-Pb geochronology and regional implications. Precambrian Res. 95: 41-67.
Biggs T.W., Dunne T., Domingues T.F. and Martinelli L.A. 2002. The relative influence of natural watershed properties and human disturbance on stream solute concentrations in the southwestern Brazilian Amazon basin. Water Resour. Res. 38(8): art. no. 1150, doi 10.1029/2001WR000271.
Bormann F.H. and Likens G.E. 1979. Pattern and Process in a Forested Ecosystem. Springer-Verlag, New York.
Bremner J.M. and Mulvaney C.S. 1982. Nitrogen-total. In: Page A.L., Miller R.H. and Keeney D.R. (eds) Methods of Soil Analysis, Part 2. Chemical and Mircrobiological Properties. American Society of Agronomy, Madison. pp. 595-624.
Browder J.O. and Godfrey B.J. 1997. Rainforest cities: urbanization, development, and globalization of the Brazilian Amazon. Columbia University Press, New York.
Brown I.F., Martinelli L.A., Thomas W.W., Moreira M.Z., Ferreira C.A.C. and Victoria R.A. 1995. Uncertainty in the biomass of Amazonian forests-an example from Rondônia, Brazil. For. Ecol. and Manage. 75: 175-189.
Bruijnzeel L.A. 1991. Nutrient input-output budgets of tropical forest ecosystems: a review. J. Trop. Ecol. 7: 25-36.
Carpenter S.R., Caraco N.F., Correll D.L., Howarth R.W., Sharpley A.N. and Smith V.H. 1998. Nonpoint pollution of surface waters with phosphorus and nitrogen. Ecol. Appl. 8: 559-568.
Clark E.A. 1998. Landscape variables affecting livestock impacts on water quality in the humid temperate zone. Can. J. Plant Sci. 78: 181-190.
Cochrane T.T. 1998. Sigteron: Sistema de Informação geográfica para os terrenos e solos do estado de Rondônia, Brasil. Tecnosolo/DHV Consultants BV, Porto Velho.
Companhia de Pesquisa de Recursos Minerais 1997. Mapa Geológico do Estado de Rondônia. Porto Velho.
Cornish P.S. and Raison R.J. 1977. Effects of phosphorus and plants on nitrogen mineralisation in three grassland soils. Plant and Soil 47: 289-295.
Creed I.F. and Band L.E. 1998. Export of nitrogen from catchments within a temperate forest: evidence for a unifying mechanism regulated by variable source area dynamics. Water Resources Research 34: 3105-3120.
Dillon P.J. and Kirchner W.B. 1975. The effects of geology and land use on the export of phosphorus from watersheds. Water Res. 9: 135-148.
Downing J.A., McClain M., Twilley R., Melack J.M., Elser J., Rabalais N.N., Lewis Jr. W.M., Turner R.E., Corredor J., Soto D., Yanez-Arancibia A. and Howarth R.W. 1999. The impact of accelerating land use change on the N-cycle of tropical aquatic ecosystems: current conditions and projected changes. Biogeochemistry 46: 109-148.
Grayson R.B., Gippel C.J., Finalyson B.L. and Hart B.T. 1997. Catchment-wide impacts on water quality: the use of 'snapshot' sampling during stable flow. J. Hydrol. 199: 121-134.
Guggenberger G., Haumaier L., Thomas R.J. and Zech W. 1996. Assessing the organic phosphorus status of an Oxisol under tropical pastures following native savanna using P-31 NMR spectroscopy. Biol. Fert. Soils 23: 332-339.
Gustafson A. 1983. Leaching of nitrate from arable land into groundwater in Sweden. Environ. Geol. 5: 65-71.
Herlihy A.T., Stoddard J.L. and Johnson C.B. 1998. The relationship between stream chemistry and watershed land cover data in the Mid-Atlantic region. US Water Air Soil Pollut. 105: 377-386.
Hill A.R. 1978. Factors affecting the export of nitrate-nitrogen from drainage basins in southern Ontario. Water Res. 12: 1045-1057.
Hobbie S.E. and Vitousek P.M. 2000. Nutrient limitation of decomposition in Hawaiian forests. Ecology 81: 1867-1877.
House W.A. and Warwick M.S. 1998. A mass-balance approach to quantifying the importance of instream processes during nutrient transport in a large river catchment. Sci. Total Environ. 210/211: 139-152.
Howarth R.W., Billen G., Swaney D., Townsend A., Jaworski N., Lajtha K., Downing J.A., Elmgren R., Caraco N., Jordan T., Berendse F., Freney J., Kudeyarov V., Murdoch P. and Zhao-Liang Z. 1996. Regional nitrogen budgets and riverine N and P fluxes for the drainages to the North Atlantic Ocean: natural and human influences. Biogeochemistry 35: 75-139.
Instituto Brasileiro de Geografía e Estatisticas IBGE 1996. Contagem da Populaçáo. Brasilia.
Instituto Brasileiro de Geografia e Estatística IBGE 2000. Pesquisa Nacional de Saneamento Básico. Rio de Janeiro.
Instituto Nacional de Pesquisas Espaciais INPE 2000. Monitoring of the Brazilian Amazonian Forest by Satellite, 1998-1999. São Jose dos Campos.
Jones D.W., Dale V.H., Beauchamp J.J., Pedlowski M.A. and O'Neill R.V. 1995. Farming in Rondônia. Resour. Energy Econ. 17: 155-188.
Kauffman S.J., Royer D.L., Chang S. and Berner R.A. 2003. Export of chloride after clear-cutting in the Hubbard Brook sandbox experiment. Biogeochemistry 63: 23-33.
Kirchner W.B. 1974. An examination of the relationship between drainage basin morphology and the export of phosphorous. Limno. Oceanogr. 20: 267-270.
Lowrance R., Altier L.S., Newbold J.D., Schnabel R.R., Groffman P.M., Denver J.M., Correll D.L., Gilliam J.W., Robinson J.L., Brinsfield R.B., Staver K. and Lucas W. 1997. Water quality functions of riparian forest buffers in Chesapeake Bay watersheds. Environ. Manage. 21: 687-712.
Malmer A. 1996. Phosphorus loading to tropical rain forest streams after clear-felling and burning in Salbah, Malaysia. Water Resour. Res. 32: 2213-2220.
Markewitz D., Davidson E.A., Figueiredo R., Victoria R.L. and Krusche A.V. 2000. Control of cation concentrations in stream waters by surface soil processes in an Amazonian watershed. Nature 410: 802-805.
Martinelli L.A., Krusche A.V., Victoria R.L., de Camargo P.B., Bernardes M., Ferraz E.S., de Moraes J.M.D. and Ballester M.V. 1999. Effects of sewage on the chemical composition of Piracicaba River, Brazil. Water Air Soil Pollu. 110: 67-79.
McFarland A.M.S. and Hauck L.M. 1999. Relating agricultural land uses to in-stream stormwater quality. J. Environ. Qual. 28: 836-844.
McKenzie L.M., Ward D.E. and Hao W.M. 1996. Chlorine and bromine in the biomass of tropical and temperate ecosystems. In: Levine J.S. (ed) Biomass Burning and Global Change, Vol 1. Remote Sensing, Modeling and Inventory Development, and Biomass Burning in Africa. MIT Press, Cambridge, Mass, pp. 241-248.
Melich, A. 1953. Determination of P, Ca, Mg, K, Na, and NH4 NCSU Soil Test Division Mimeograph. Raleigh, NC.
Merriam J.L., McDowell W.H., Tank J.L., Wollheim W.M., Crenshaw C.L. and Johnson S.L. 2002. Characterizing nitrogen dynamics, retention and transport in a tropical rainforest stream using an in situ 15N addition. Freshwater Biol. 47: 143-160.
Mortatti J., Probst J.L. and Ferreira J.R. 1992. Hydrological and geochemical characteristics of the Jamari and Jiparana river basins (Rondonia, Brazil). GeoJournal 26: 287-296.
Neff J.C., Hobbie S.E. and Vitousek P.M. 2000. Nutrient and mineralogical control on dissolved organic C, N and P fluxes and stoichiometry in Hawaiian soils. Biogeochemistry 51: 283-302.
Neill C., Piccolo M.C., Steudler P.A., Melillo J.M., Feigl B.J. and Cerri C.C. 1995. Nitrogen dynamics in soils of forests and active pastures in the western Brazilian Amazon basin. Soil Biol. Biochem. 27: 1167-1175.
Neill C., Deegan L.A., Thomas S.M. and Cerri C.C. 2001. Deforestation for pasture alters nitrogen and phosphorus in small Amazonian streams. Ecol. Appl. 11: 1817-1828.
Newbold J.D., Elwood J.W., Schulze M.S.R.W.S. and Barmeier J.C. 1983. Continuous ammonium enrichment of a woodland stream: uptake kinetics, leaf decomposition, and nitrification. Freshwater Biol. 13: 193-204.
Novotny V. and Chesters G. 1981. Handbook of Nonpoint Pollution: Sources and Management. Van Nostrand Reinhold, New York.
Nye P.H. and Greenland D.J. 1960. The Soil Under Shifting Cultivation. Commonwealth Bureau of Soils, Harpenden, UK.
Ometo J.P.H.B., Martinelli L.A., Ballester M.V., Gessner A., Krusche A.V., Victoria R.L. and Williams M. 2000. Effects of land use on water chemistry and macroinvertebrates in two streams of the Piracicaba river basin, south-east Brazil. Freshwater Biol. 44: 327-337.
Pastor J., Aber J.D., McClaugherty C.A. and Melillo J.M. 1984. Aboveground production and N and P cycling along a nitrogen mineralization gradient on Blackhawk Island, Wisconsin. Ecology 65: 256-268.
Pedlowski M.A., Dale V.H., Matricardi E.A.T. and da Silva Filho E.P. 1997. Patterns and impacts of deforestation in Rondonia, Brazil. Landscape Urban Plan. 38: 149-157.
Peterjohn W.T. and Correll D.L. 1984. Nutrient dynamics in an agricultrual watershed: observations on the role of a riparian forest. Ecology 65: 1466-1475.
Peterson B.J., Wollheim W.M., Mulholland P.J., Webster J.R., Meyer J.L., Tank J.L., Martí E., Bowden W.B., Valett H.M., Hershey A.E., McDowell W.H., Dodds W.K., Hamilton S.K., Gregory S. and Morrall D.D. 2001. Control of nitrogen export from watersheds by headwater streams. Science 292: 86-90.
Pote D.H., Daniel T.C., Nichols D.J., Sharpley A.N., Moore Jr. P.A., Miller D.M. and Edwards D.R. 1999. Relationship between phosphorus levels in three ultisols and phosphorus concentrations in runoff. J. Environ. Qual. 28: 170-175.
Qualls R.G., Haines B.L., Swank W.T. and Tyler S.W. 2000. Soluble organic and inorganic nutrient fluxes in clearcut and mature deciduous forests. Soil Sci. Soc. Am. J. 64: 1068-1077.
Qualls R.G., Haines B.L., Swank W.T. and Tyler S.W. 2002. Retention of soluble organic nutrients by a forested ecosystem. Biogeochemistry 61: 135-171.
RADAMBRASIL 1978. Levantamento de recursos naturais. Ministerio das Minas e Energia, Rio de Janeiro.
Rignot E., Salas W.A. and Skole D.L. 1997. Mapping deforestation and secondary growth in Rondonia, Brazil, using imaging radar and thematic mapper data. Remote Sens. Environ. 59: 167-179.
Roberts D.A., Numata I., Holmes K., Batista G., Krug T., Monteiro A., Powell B. and Chadwick O.A. 2002. Large area mapping of land-cover change in Rondónia using multitemporal spectral mixture analysis and decision tree classifiers. J. Geophys. Res. 107: 8073, JD000374.
Seitzinger S.P., Styles R.V., Boyer E.W., Alexander R.B., Billen G., Howarth R.W., Mayer B. and Van Breemen N. 2002. Nitrogen retention in rivers: model development and application to watersheds in the northeastern U.S.A. Biogeochemistry 57/58: 199-237.
Silver W.L., Neff J., McGroddy M., Veldkamp E., Keller M. and Cosme R. 2000. Effects of soil texture on belowground carbon and nutrient storage in a lowland Amazonian forest ecosystem. Ecosystems 3: 193-209.
Smith R.A., Schwartz G.E. and Alexander R.B. 1997. Regional interpretation of water-quality monitoring data. Water Resour. Res. 33: 2781-2798.
Sombroek W.G. 1966. Amazon Soils: a Reconnaissance of the Soils of the Brazilian Amazon Region. Centre for Agricultural Publications and Documentation, Wageningen.
Sonzogni W.C., Chesters G., Coote D.R., Jeffs D.N., J.C.K, R.C.O and Robinson J.B. 1980. Pollution from land runoff. Environ. Sci. Technol. 14: 148-153.
Swank W.T. and Vose J.M. 1997. Long-term nitrogen dynamics of Coweeta forested watersheds in the southeastern United States of America. Global Biogeochem. Cycles 11: 657-671.
Swank W.T., Vose J.M. and Elliott K.J. 2001. Long-term hydrologic and water quality responses following commercial clearcutting of mixed hardwoods on a southern Appalachian catchment. For. Ecol. Manage. 143: 163-178.
Thomas S.M., Neill C., Deegan L.A., Krusche A.V., Ballester V.M. and Victoria R.L. Influences of land use and stream size on particulate and dissolved materials in a small Amazonian stream network. Biogeochemistry (in press).
Triska F.J., Kennedy V.C., Avanzino R.J., Zellweger G.W. and Bencala K.E. 1989. Retention and transport of nutrients in a third-order stream: channel processes. Ecology 70: 1877-1892.
Uhl C. and Jordan C.F. 1984. Succession and nutrient dynamics following forest cutting and burning in Amazonia. Ecology 65: 1476-1490.
Valderrama J.C. 1981. The simultaneous analysis of total nitrogen and total phosphorus in natural waters. Marine Chem. 10: 109-122.
Vitousek P.M. and Reiners W.A. 1975. Ecosystem succession and nutrient retention: a hypothesis. BioScience 25: 376-381.
Vitousek P.M. and Sanford R.L.J. 1986. Nutrient cycling in moist tropical forest. Ann. Rev. Ecol. Syst. 17: 137-167.
Vitousek P.M. and Matson P.A. 1988. Nitrogen transformations in a range of tropical forest soils. Soil Biol. Biochem. 20: 361-367.
Vitousek P.M., Gosz J.R., Grier C.G., Melillo J.M., Reiners W.A. and Todd R.L. 1979. Nitrate losses from disturbed ecosystems. Science 204: 469-474.
Vollenweider R.A. 1971. The Scientific Fundamentals of Lake and Stream Eutrophication with Particular Reference to Phosphorus and Nitrogen as Eutrophication Factors. OECD, Paris
Walkey A. and T.A.B. 1934. An examination of the Degtjareff method for determining soil organic matter, and a proposed modification of the chromic acid titration method. Soil Sci. 37: 29-38.
Williams M.R. and Melack J.M. 1997. Solute export from forested and partially deforested catchments in the central Amazon. Biogeochemistry 38: 67-102.
Williams M.R., Fisher T.R. and Melack J.M. 1997. Solute dynamics in soil water and groundwater in a central Amazon catchment undergoing deforestation. Biogeochemistry 38: 303-335.
Wong M.T.F., Hughes R. and Rowell D.L. 1990. Retarded leaching of nitrate in acid soils from the tropics: measurement of the effective anion exchange capacity. J. Soil Sci. 41: 655-663
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Biggs, T., Dunne, T. & Martinelli, L. Natural controls and human impacts on stream nutrient concentrations in a deforested region of the Brazilian Amazon basin. Biogeochemistry 68, 227–257 (2004). https://doi.org/10.1023/B:BIOG.0000025744.78309.2e
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DOI: https://doi.org/10.1023/B:BIOG.0000025744.78309.2e