Organic carbon export from upland and forested wetland watersheds1

Mulholland, Patrick J.; Kuenzler, Edward J.

doi:10.4319/lo.1979.24.5.0960

Cited by 153 publications

(92 citation statements)

References 6 publications

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“…Effect of wetlands on DON-Wetlands are important sources of dissolved organic matter to streams and rivers, particularly when they fringe stream channels or discharge directly into streams (Mulholland and Kuenzler 1979;Eckhardt and Moore 1990;Fiebig et al 1990;Fölster 2000;Raymond and Hopkinson 2003). Shallow flow paths from wetlands to streams bypass most mineral soils, which are known to retain DON as well as DOC (Aitkenhead-Petersen et al 2003).…”

Section: Effect Of Land Use On Don-individual Watershedmentioning

confidence: 99%

“…Wetlands have been shown to function as sinks for inorganic N through denitrification (Hill, 1996), as well as sites where inorganic N may be converted to organic N (Devito et al, 1989). Although regional studies linking DON to natural landscape features have had limited success (Clair et al, 1994), relationships between stream water dissolved organic carbon (DOC) (Mulholland and Kuenzler 1979;Eckhardt and Moore 1990;Raymond and Hopkinson 2003) and wetland abundance suggest that wetlands may play an important role in hydrologic DON losses from forested and developed watersheds.…”

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confidence: 99%

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Role of wetlands and developed land use on dissolved organic nitrogen concentrations and DON/TDN in northeastern U.S. rivers and streams

Pellerin

Wollheim

Hopkinson

et al. 2004

Limnology & Oceanography

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Previous studies have shown that watersheds with significant human development (i.e., urban and agricultural land use) generally have higher concentrations and fluxes of dissolved inorganic nitrogen (DIN) in comparison to less-developed or forested watersheds. However, the impact of watershed development on dissolved organic nitrogen (DON) concentrations in drainage waters has received little attention. We present data from 39 watersheds in Massachusetts (Ipswich River watershed) encompassing a gradient of developed land use (0%-92% urban plus agriculture) and wetland abundance (0%-32%) to assess controls on mean annual DON concentrations and DON/ total dissolved nitrogen (TDN) in drainage waters. In addition, we compiled published data from 119 northeastern U.S. watersheds to evaluate broader-scale relationships between DON, developed land use, and wetlands. The percentage of developed land is a poor predictor of DON concentrations in the Ipswich watersheds (r 2 ϭ 0.09) and the compiled dataset (r 2 ϭ 0.27). In contrast, wetland percentage explains 56% of the variability in DON concentrations in the Ipswich watersheds, and 60% when all literature data are included. Excluding watersheds with direct wastewater inputs to surface waters improves the regional relationship significantly (r 2 ϭ 0.79). The DON : TDN ratio is best explained by a multiple regression of wetland percentage and developed land use percentage for both the Ipswich watersheds (r 2 ϭ 0.73) and the compiled dataset (r 2 ϭ 0.50). Watersheds with abundant wetlands may therefore have high DON concentrations and DON : TDN ratios despite elevated anthropogenic nitrogen inputs associated with human development.Humans have significantly altered the global nitrogen (N) cycle in the temperate northeastern United States (Howarth 1 Corresponding author (Brian.Pellerin@unh.edu) (603) 862-4054, Fax: (603) 862-0587. AcknowledgmentsWe thank Joe Vallino, Ed Rastetter, and Luc Claussens for Ipswich River watershed sample collection and analysis, and Keith Robinson for NECB data. We also thank John Aber, Steve Frolking, Steven Hamilton, and two anonymous reviewers for helpful comments on the manuscript.

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Section: Effect Of Land Use On Don-individual Watershedmentioning

confidence: 99%

mentioning

confidence: 99%

Role of wetlands and developed land use on dissolved organic nitrogen concentrations and DON/TDN in northeastern U.S. rivers and streams

Pellerin

Wollheim

Hopkinson

et al. 2004

Limnology & Oceanography

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“…Peat accumulates due to water-logging, anaerobic conditions and thus slow rates of decomposition. Hydrologie, thermal, and nutrient regimes are the controlling factors of decomposition in wetlands (Moore 1988 Day et al 1977;Mulholland and Kuenzler 1979;McKnight et al 1985;Clair and Freedman 1986;Collier et al 1989;Urban et al 1989: Eckhardt andMoore 1990 …”

Section: Sources Sines and Fluxes Of Docmentioning

confidence: 99%

“…Mulholland and Kuenzler 1979;Mulholland 1981a;Schlesinger and Melack 1981;Grieve 1984a;Moore 1987b: Moore and Jackson 1989: Eckhardt and Moore 1990.…”

Section: Peatlands: An Important Doc Sourcementioning

confidence: 99%

Sources, Sinks, and Fluxes of Dissolved Organic Carbon in Subarctic Fen Catchments

Koprivnjak¹,

Moore²

1992

Arctic and Alpine Research

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The sources, sinks, fluxes, spatial distributions, and temporal variations of dissolved organic carbon (DOC) in subarctic fen catchrnents as weIl as the temporal patterns of D0C in streams draining subarctic fen catchments in the region of Schefferville, Québec were investigated.In June to August sampling, DOC concentrations averaged 17 mg/L in peat water, 2 -16 mg/L in stream water, 49 -56 mg/L in canopy throughfall, 14 -19 ii

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“…The occurrence of mires in boreal headwater catchments has been shown to be significantly correlated with stream chemistry. Processes in peat and other frequently saturated organic soils produce humic substances that are transported to streams (Clair et al, 1994;Dillon and Molot, 1997;Mulholland and Kuenzler, 1979;Eckhardt et al, 1990;Koprivnjak and Moore, 1992;Hope et al, 1994;Mulholland, 1997). Hemond (1990) suggested that the most important processes take place in the riparian zone, and that they depend on stream flow generation.…”

Section: Wetlands Vegetation Cover and Dissolved Organic Mattermentioning

confidence: 99%

Using official map data on topography, wetlands and vegetation cover for prediction of stream water chemistry in boreal headwater catchments

Andersson

Nyberg

2009

Hydrol. Earth Syst. Sci.

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Abstract.A large part of the spatial variation of stream water chemistry can be related to inputs from headwater streams. In order to understand and analyse the dominant processes taking place in small and heterogeneous catchments, accurate data with high spatial and temporal resolution is necessary. In most cases, the quality and resolution of available map data are considered too poor to be used in environmental assessments and modelling of headwater stream chemistry. In this study 18 forested catchments (1-4 km 2 ) were selected within a 120×50 km region in the county of Värmland in western Sweden. The aim was to test if topographic and vegetation variables derived from official datasets were correlated to stream water chemistry, primarily the concentration of dissolved organic carbon (DOC), but also Al, Fe and Si content. GIS was used to analyse the elevation characteristics, generate topographic indices, and calculate the percentage of wetlands and a number of vegetation classes. The results clearly show that topography has a major influence on stream water chemistry. There were strong correlations between mean slope and percentage wetland, percentage wetland and DOC, mean slope and DOC, and a very strong correlation between mean topographic wetness index (TWI) and DOC. The conclusion was that official topographic data, despite uncertain or of low quality and resolution, could be useful in the prediction of headwater DOC-concentration in boreal forested catchments.

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Organic carbon export from upland and forested wetland watersheds1

Cited by 153 publications

References 6 publications

Role of wetlands and developed land use on dissolved organic nitrogen concentrations and DON/TDN in northeastern U.S. rivers and streams

Role of wetlands and developed land use on dissolved organic nitrogen concentrations and DON/TDN in northeastern U.S. rivers and streams

Sources, Sinks, and Fluxes of Dissolved Organic Carbon in Subarctic Fen Catchments

Using official map data on topography, wetlands and vegetation cover for prediction of stream water chemistry in boreal headwater catchments

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