Nitrogen retention in natural Mediterranean wetland-streams affected by agricultural runoff

García-García, V.; Gómez, Rosa; Gutiérrez, María Rosario Vidal-Abarca; Suárez, María Luisa

doi:10.5194/hess-13-2359-2009

Cited by 18 publications

(19 citation statements)

References 55 publications

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“…The retention efficiency estimated at our oxbow site is consistent with other oxbow studies. Garcia-Garcia et al (2009) reported that the mean nitrate retention efficiency was 72.3% for two oxbows in Spain. Fink and Mitsch (2007) measured annual nitrate retention to be 48±3% in a created oxbow receiving streamflow diversions.…”

Section: Discussionmentioning

confidence: 99%

“…Cl is a conservative tracer that does not undergo transformation or removal in solutions, so variations in Cl concentrations track water flow and the combined effects of dilution, dispersion and diffusion processes. Loss of N relative to Cl concentrations suggests removal of N from the aqueous system from biophysical processes such as assimilation or denitrification (e.g., Simmons et al, 1992;Sabater et al, 2003;Garcia-Garcia et al, 2009).…”

Section: Nitrate Retention Calculationsmentioning

confidence: 99%

“…Daily nitrate retention efficiency (%R) was calculated using the equation (Garcia-Garcia et al, 2009):…”

Section: Nitrate Retention Calculationsmentioning

confidence: 99%

“…Using 15 N experiments at the same two sites, Harrison et al,(2012) estimated that during the summer, plant and algal uptake accounted for 42 to 63% of the added 15 NO3, with the remainder assumed to be lost via denitrification. Garcia-Garcia et al (2009) used nitrate-chloride ratios to quantify nitrate retention and estimated it to be 72% for a wetland-stream system dominated by high inflow nitrate concentrations (above 20 mg/l). Jones et al (2015) compared mean nitrate concentrations in three oxbows to inlet tile water and found a 45 to 61% reduction in concentration.…”

Section: Introductionmentioning

confidence: 99%

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Nitrate reduction in a reconstructed floodplain oxbow fed by tile drainage

Schilling

Kult

Wilke

et al. 2017

Ecological Engineering

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Conservation practices are needed to reduce the loss of nitrate via subsurface tile drainage systems and in this study we evaluated nitrate retention in a reconstructed oxbow in central Iowa that was engineered to receive inputs from two drainage tiles. Our objectives were to evaluate the hydrogeology and nitrate loading patterns and quantify the average and seasonal nitrate retention efficiency in the reconstructed oxbow. Over a two-year period, water and nitrate concentrations and loads into the oxbow were dominated by tile drainage inputs compared to groundwater seepage. Nitrate concentrations were highest in tile drainage water (9 to 17 mg/l), similar in upgradient groundwater and in the oxbow itself (4-8 mg/l) and lowest in downgradient groundwater (0.2 mg/l). Using N:Cl ratios, we estimated nitrate retention efficiency from May to September to range from 44% to 47% in 2014 and 2015, respectively, and found that on a monthly basis, greater retention efficiencies were measured in late summer and early fall. The nitrate retention efficiency was similar to other practices such as bioreactors, wetlands and saturated buffers. Given ecosystem benefits of oxbows and similar costs compared to bioreactors, we believe that reconstructing oxbows to receive tile drainage water should be considered a viable practice for tile drainage treatment in agricultural areas.

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Section: Discussionmentioning

confidence: 99%

Section: Nitrate Retention Calculationsmentioning

confidence: 99%

“…Daily nitrate retention efficiency (%R) was calculated using the equation (Garcia-Garcia et al, 2009):…”

Section: Nitrate Retention Calculationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Nitrate reduction in a reconstructed floodplain oxbow fed by tile drainage

Schilling

Kult

Wilke

et al. 2017

Ecological Engineering

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“…Studies conducted by García-García et al (2009) reported the efficiency of nitrogen retention in natural Mediterranean wetlands that are affected by agricultural runoff to the retention of nitrate-N reaching high as 72.3%. Sousa (2004) found an efficiency of nutrient removal in satisfactory 60% nitrogen and 80% of phosphorus of a constructed wetland wastewater treatment.…”

Section: Calculation Of Efficiency Of Retentionmentioning

confidence: 99%

Wetland nutrient retention and multitemporal growth – Case study of Riacho Fundo’s Wetland

Dias

Baptista

2015

Acta Limnol. Bras.

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Aim: The aim of this research was to evaluate the nutrient retention of Riacho Fundo’s wetland in controlling Lake Paranoá (Brasilia, Brazil) eutrophication analyzing its ability to retain nitrogen and phosphorus. Furthermore, the article aimed at verifying the multitemporal growth rate of Riacho Fundo’s wetland. Methods Five sampling points were distributed along the wetland, from its beginning to its outflow into Lake Paranoá. Twenty-five field campaigns during periods of drought and rain from November 2011 to October 2012 with intervals of fifteen days were accomplished. The parameters total nitrogen and total phosphorus were analyzed and for comparison between the sampling points a non-parametric statistical analysis was performed and the efficiency of retention of these parameters between input and outputs of the wetland was calculated. For the analysis of multitemporal pace of growth in the area of wetland, water area and was estimated by processed satellite images of the years 1973, 1985, 1995, 2005 and 2011. Results The general behavior of the analyzed nutrients was decay between the entry point and exit point of showing an overall average retention of nitrogen 36.66% and 33.95% overall average total phosphorus. By image processing was possible to estimate that the surface of the lake was lost 0.5273 km2 or 84.07% of the initial area in the range of 38 years. Conclusion Despite having lost water area, Lake Paranoá gained a natural filter that retains nutrients that could be being invested in it and so can cause eutrophication of its waters. Thus, the wetland provides an ecological service of water treatment and preservation of aquatic and terrestrial Lake Paranoá life and the wetland should be considered as an importanttheme in Lake Paranoá management.

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Knowledge gaps and challenges for conservation of Mediterranean wetlands: Evidence from a comprehensive inventory and literature analysis for Sardinia

Fois

Cuena-Lombraña

Bacchetta

2021

Aquatic Conservation

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Wetlands are some of the most important ecosystems on Earth. They play a key role in mitigating climate change‐related events and filtering polluted water, and provide habitats for a wide range of species. Despite their importance, and numerous regulations that support their conservation, wetlands continue to be destroyed. Recent reports have indicated a progressive decline in ecological character of remaining wetlands. This research reviews and extends the present status of wetland knowledge in Sardinia, the second largest Mediterranean island. For the first time, Sardinian wetlands were comprehensively mapped using satellite images and field validation. Impacts were also assessed. Trends in literature published about Sardinian wetlands since 1900 were then analysed, mainly according to the location(s) and topic(s) studied. In total, 2,501 Sardinian wetland sites were identified. The most common impacts observed in the field were vegetative degradation and water pollution. Of these wetlands, 2,274 have never been the subject of a research paper. Despite recent increases in publication rates, there was a lack of even basic knowledge about many wetlands, especially smaller ones. Larger wetlands have been studied from a range of viewpoints. In the light of these results, suggestions for improved awareness, effective management and conservation of Mediterranean wetlands were established. Future work should be directed to filling gaps in basic information, and to improvements in research and conservation, which might include multidisciplinary approaches in support of more comprehensive conservation management plans.

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Nitrogen retention in natural Mediterranean wetland-streams affected by agricultural runoff

Abstract: Abstract. Nitrogen retention efficiency in natural Mediterranean wetland-streams affected by agricultural runoff was quantified and the effect of the temporal variability and hydrological/chemical loading was examined from

Cited by 18 publications

References 55 publications

Nitrate reduction in a reconstructed floodplain oxbow fed by tile drainage

Nitrate reduction in a reconstructed floodplain oxbow fed by tile drainage

Wetland nutrient retention and multitemporal growth – Case study of Riacho Fundo’s Wetland

Knowledge gaps and challenges for conservation of Mediterranean wetlands: Evidence from a comprehensive inventory and literature analysis for Sardinia

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