Spatial and Temporal Patterns of Denitrification in a Riparian Forest

Pinay, Gilles; Roques, Lydie; Fabre, André

doi:10.2307/2404238

Cited by 182 publications

(87 citation statements)

References 34 publications

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“…Studies have been done on soils and sediments, using core samples (Smith and Duff, 1988 ;Pinay et al, 1993;Bengtsson and Bergwall, 1995 ;Burt et al, 1999) or in situ microcosms (Starr and Gillham, 1993). Some studies try to evaluate a denitrification rate in aquifers by bacteria located in the groundwater.…”

Section: Discussionmentioning

confidence: 99%

A standardised method for measuring in situ denitrification in shallow aquifers: numerical validation and measurements in riparian wetlands

Sánchez‐Pérez

Bouey

Sauvage

et al. 2003

Hydrol. Earth Syst. Sci.

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A tracer test to examine in situ denitrification in shallow groundwater by a piezometer with a packer system used bromide as a tracer of dilution and acetylene (10%) to block the denitrification process at the nitrous oxide stage. During the test, dissolved oxygen, nitrate (NO 3 -), bromide (Br-), nitrous oxide (N 2 O) and dissolved organic carbon (DOC) were measured. To calibrate the experimental method, comparison with numerical simulations of the groundwater transfer were carried out, taking into account the environmental characteristics. The method was tested by measurements undertaken in different environmental conditions (geology, land use and hydrology) in two riparian wetlands. Denitrification rates measured by this method ranged from 5.7 10 -6 g N-NO 3 -L -1 h -1 to 1.97 10The method is applicable in shallow aquifers with a permeability from 10 -2 to 10 -4 m s -1 .

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Section: Discussionmentioning

confidence: 99%

A standardised method for measuring in situ denitrification in shallow aquifers: numerical validation and measurements in riparian wetlands

Sánchez‐Pérez

Bouey

Sauvage

et al. 2003

Hydrol. Earth Syst. Sci.

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“…When N-enriched surface runoff and groundwater interact with carbon-rich riparian soils, denitrification becomes an important process for nitrate (NO 3 -) removal (Triska et al 1993;Pinay et al 1993;). The process of denitrification involves reduction of NO 3 -to nitrous oxide (N 2 O) gas and dinitrogen gas (N 2 ) by heterotrophic bacteria (Knowles 1982).…”

Section: Anthropogenic Activity Has Drastically Altered the Global Nimentioning

confidence: 99%

Nitrous oxide fluxes and dissolved N gases (N2 and N2O) within riparian zones along the agriculturally impacted San Joaquin River

Hinshaw

Dahlgren

2016

Nutr Cycl Agroecosyst

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TitleNitrous oxide fluxes and dissolved N gases (N2 and N2O) within riparian zones along the agriculturally impacted San Joaquin River ? and NO 3 -, while benthic N 2 O fluxes were regulated by variations in dissolved oxygen and river flow. Higher fluxes in the riparian soils in 2011 were attributed to several months of flooding that significantly impacted groundwater tables and nutrient availability. Dissolved N 2 O from groundwater within the riparian zones was not found to be a significant factor contributing to atmospheric fluxes. These results suggest that riparian zones within the agriculturally impacted San Joaquin River were a significant source of N 2 O when elevated NO 3 -was present. Different controlling factors for fluxes within benthic sediments suggested that riparian vegetation did not play a role in NO 3 -concentrations or fluxes within the surface water.

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“…Many workers have reported such buffers to be effective at removing nitrate from drainage water flowing either through or across the riparian zone. For example, Pinay et al (1993) found that a 30 m riparian buffer removed nitrate to less than detection levels in the shallow ground water flowing through a riparian forest by the River Garonne in France. similarly demonstrated that 99% of the nitrate in waters draining from arable fields across a poplar floodplain in England during the winter was retained within the first 5 m of the buffer area.…”

Section: Buffer Widthmentioning

confidence: 99%

The effects of riparian forest management on the freshwater environment: a literature review of best management practice

Broadmeadow

Nisbet

2004

Hydrol. Earth Syst. Sci.

277

237

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National Forests and Water Guidelines require the establishment of riparian buffers to help protect the freshwater environment from disturbance by silvicultural operations on the adjacent land. The main functions of the riparian buffer are considered to be sediment removal and erosion control, protection of water quality, moderation of shade and water temperature, maintenance of habitat structural diversity and ecological integrity, and improvement of landscape quality. This review paper assesses how these functions are affected by the design and management of the riparian forest zone, with a focus on the width of the buffer, the structure of the vegetation and species choice. It is not possible to specify a definitive riparian buffer width that will protect the freshwater environment from every potential threat. Forestry agencies usually recommend widths between 10 and 30 m. Buffer widths towards the lower end of this scale tend to protect the physical and chemical characteristics of a stream, while the maintenance of ecological integrity requires widths at the upper end. In terms of structure and species, the benefits are greatest where the riparian buffer replicates native riparian woodland with an open canopy of mixed species of varied age class. The optimum level of shade is difficult to quantify but limited work suggests that a good balance is achieved where around 50% of the stream surface is open to sunlight and the remainder covered by dappled shade. Within the management of riparian woodland there is a need to consider a streams sensitivity and intrinsic value. Some sites will benefit from active intervention such as thinning, coppicing or pollarding, while others will be favoured by a hands-off approach. Long-term continuity of management is important to ensure that the potential benefits to the freshwater environment are realised.

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Spatial and Temporal Patterns of Denitrification in a Riparian Forest

Cited by 182 publications

References 34 publications

A standardised method for measuring in situ denitrification in shallow aquifers: numerical validation and measurements in riparian wetlands

A standardised method for measuring in situ denitrification in shallow aquifers: numerical validation and measurements in riparian wetlands

Nitrous oxide fluxes and dissolved N gases (N2 and N2O) within riparian zones along the agriculturally impacted San Joaquin River

The effects of riparian forest management on the freshwater environment: a literature review of best management practice

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