Nitrogen, Phosphorus, and Organic Carbon in Streams Draining Two Grazed Catchments

Nelson, Paul N.; Cotsaris, E.; Oades, JM

doi:10.2134/jeq1996.00472425002500060008x

Cited by 60 publications

(15 citation statements)

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“…Carbon export as a function of total nitrogen export constructed from data from temperate and tropical catchments around the world. (Naiman and Sibert 1978;Meyer et al 1981;Meybeck et al 1988;Wafar et al 1989;Howarth et al 1991;McDowell and Asbury 1994;Nelson et al 1996;Hope 1997). (Wasson et al 1996;Letcher et al 1999).…”

Section: Resultsmentioning

confidence: 99%

Carbon, nitrogen, and phosphorus budgets for a shallow subtropical coastal embayment (Moreton Bay, Australia)

Eyre

McKee

2002

Limnology & Oceanography

116

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Average annual carbon, nitrogen, and phosphorus budgets were constructed for Moreton Bay. Primary production was the dominant source of carbon (by two orders of magnitude), N fixation was the dominant source of nitrogen, and point sources were the dominant source of phosphorus to the bay. About 41% of the nitrogen and 70% of the phosphorus entering Moreton Bay was exported to the ocean, and about 56% of the nitrogen was lost to denitrification. The high percentage loss of phosphorus to the ocean was directly related to the short residence time of the bay (46 d), which was consistent with other shallow coastal ecosystems. In contrast, the percentage loss of nitrogen to the ocean was low compared to other coastal systems due to the high percentage loss through denitrification associated with autotrophic sediments in the bay that enhance denitrification. Because most denitrification studies have been carried out using only dark incubations, the importance of denitrification to the nitrogen budgets of coastal systems in general may be underestimated. Carbon loss from Moreton Bay was dominated (by two orders of magnitude) by atmospheric exchange of CO 2 associated with benthic and pelagic respiration. The distinct difference between Moreton Bay (subtropical) and temperate systems was the dominance of biological (microbial: N fixation and denitrification) over physical inputs and losses of nitrogen. High N fixation in turn fuels a positive annual mean net ecosystem metabolism (NEM) of 21 g C m Ϫ2 yr Ϫ1 and suggests that primary production in the bay is phosphorus limited at the whole ecosystem scale.

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Section: Resultsmentioning

confidence: 99%

Carbon, nitrogen, and phosphorus budgets for a shallow subtropical coastal embayment (Moreton Bay, Australia)

Eyre

McKee

2002

Limnology & Oceanography

116

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“…Rodríguez-Blanco et al, 2009) as well as those of other authors (Bechmann and Stalnacke, 2005;Stutter et al, 2008), which inferred that PP was the dominant component in TP during runoff events. However, PP is not always the main component of TP in runoff, as it has been demonstrated when a permanent plant cover is present in the soil (Nelson et al, 1996;Nash et al, 2000).…”

Section: Event Response In Ss and P Formmentioning

confidence: 98%

Sediment and phosphorus loss in runoff from an agroforestry catchment, NW Spain

Rodríguez‐Blanco

Taboada-Castro

2009

Land Degrad Dev

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This study was conducted to evaluate the factors controlling sediment and phosphorus export in a small agroforestry catchment located in NW Spain. At the catchment outlet discharge was continuously measured and suspended sediment (SS) and total (PT), particulate phosphorus (PP) and dissolved phosphorus (DP) were determined during seven rainfall events occurred in autumn. Sediment and sediment-associated P export differed significantly between events. Particulate P was a greater portion of P transported in runoff. A large proportion of SS and PP exported from the catchment occurred from a relatively small portion of the catchment and during only two events. Rills and gullies delivered most of the eroded sediment directly to the stream, which contribute to high sediment and phosphorus exportation at the catchment outlet. Strong correlations between P and SS concentrations suggest that erosion processes are important in P fluxes. The highly significant correlation between SS and P concentrations in the stream enables to estimate transported P using SS in the Corbeira catchment.

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“…In such cases, the average of the concentrations measured during the event is presented (e.g. Nelson et al, 2006). (4) Collecting concentration data during events without information on the specific flow conditions at the time of sampling.…”

Section: Defining Mean Concentrationmentioning

confidence: 99%

A review of sediment and nutrient concentration data from Australia for use in catchment water quality models

Bartley

Speirs

Ellis

et al. 2012

Marine Pollution Bulletin

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Nitrogen, Phosphorus, and Organic Carbon in Streams Draining Two Grazed Catchments

Cited by 60 publications

References 0 publications

Carbon, nitrogen, and phosphorus budgets for a shallow subtropical coastal embayment (Moreton Bay, Australia)

Carbon, nitrogen, and phosphorus budgets for a shallow subtropical coastal embayment (Moreton Bay, Australia)

Sediment and phosphorus loss in runoff from an agroforestry catchment, NW Spain

A review of sediment and nutrient concentration data from Australia for use in catchment water quality models

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