Nitrogen and phosphorus dynamics of a re-wetted shallow-flooded peatland

Kieckbusch, Jan Jacob; Schrautzer, Joachim

doi:10.1016/j.scitotenv.2006.10.002

Cited by 71 publications

(38 citation statements)

References 10 publications

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“…Although there remained a reasonable number (39) of studies in quality category 3 with low susceptibility to Table 7 Number of included wetlands by inflow type…”

Section: Fig 3 Location Of Included Wetland Studiesmentioning

confidence: 99%

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How effective are created or restored freshwater wetlands for nitrogen and phosphorus removal? A systematic review

et al. 2016

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Background: Eutrophication of aquatic environments is a major environmental problem in large parts of the world. In Europe, EU legislation (the Water Framework Directive and the Marine Strategy Framework Directive), international conventions (OSPAR, HELCOM) and national environmental objectives emphasize the need to reduce the input of nutrients to freshwater and marine environments. A widely used method to achieve this is to allow water to pass through a created or restored wetland. However, the large variation in measured nutrient removal rates in such wetlands calls for a systematic review. Methods:Searches for primary studies were performed in electronic databases and on the internet. One author performed the screening of all retrieved articles at the title and abstract level. To check that the screening was consistent and complied with the agreed inclusion/exclusion criteria, subsets of 100 articles were screened by the other authors. When screening at full-text level the articles were evenly distributed among the authors. Kappa tests were used to evaluate screening consistency. Relevant articles remaining after screening were critically appraised and assigned to three quality categories, from two of which data were extracted. Quantitative synthesis consists of meta-analyses and response surface analyses. Regressions were performed using generalized additive models that can handle nonlinear relationships and interaction effects.Results: Searches generated 5853 unique records. After screening on relevance and critical appraisal, 93 articles including 203 wetlands were used for data extraction. Most of the wetlands were situated in Europe and North America. The removal rate of both total nitrogen (TN) and total phosphorus (TP) is highly dependent on the loading rate. Significant relationships were also found for annual average air temperature (T) and wetland area (A). Median removal rates of TN and TP were 93 and 1.2 g m −2 year −1 , respectively. Removal efficiency for TN was significantly correlated with hydrologic loading rate (HLR) and T, and the median was 37 %, with a 95 % confidence interval of 29-44 %. Removal efficiency for TP was significantly correlated with inlet TP concentration, HLR, T, and A. Median TP removal efficiency was 46 % with a 95 % confidence interval of 37-55 %. Although there are small differences in average values between the two quality categories, the variation is considerably smaller among high quality studies compared to studies with lower quality. This suggests that part of the large variation between studies may be explained by less rigorous study designs. Conclusions:On average, created and restored wetlands significantly reduce the transport of TN and TP in treated wastewater and urban and agricultural runoff, and may thus be effective in efforts to counteract eutrophication. However, restored wetlands on former farmland were significantly less efficient than other wetlands at TP removal.

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“…Although there remained a reasonable number (39) of studies in quality category 3 with low susceptibility to Table 7 Number of included wetlands by inflow type…”

Section: Fig 3 Location Of Included Wetland Studiesmentioning

confidence: 99%

“…One included wetland showed a small (non-significant) negative TN removal rate [39]. This was a multi-purpose FWS wetland that had been restored on formerly drained cropland.…”

Section: Removal Of Tnmentioning

confidence: 99%

How effective are created or restored freshwater wetlands for nitrogen and phosphorus removal? A systematic review

et al. 2016

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“…However, recent studies have shown that ponds and stormwater wetlands were less efficient at P retention than at retaining nitrogen (N) [5,6,13]. In some cases (e.g., in [7,13,14]), the SCMs were actually net sources of P to streams or rivers.…”

Section: Introductionmentioning

confidence: 99%

Phosphorus Retention in Stormwater Control Structures across Streamflow in Urban and Suburban Watersheds

Duan

Johnson

Mayer

et al. 2016

Water

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Abstract:Recent studies have shown that stormwater control measures (SCMs) are less effective at retaining phosphorus (P) than nitrogen. We compared P retention between two urban/suburban SCMs and their adjacent free-flowing stream reaches at the Baltimore Long-Term Ecological Study (LTER) site, and examined changes in P retention in SCMs across flow conditions. Results show that, when compared with free-flowing stream reaches, the SCMs had significantly lower dissolved oxygen (%DO) and higher P concentrations, as well as lower mean areal retention rates and retention efficiencies of particulate P (PP). In all the SCMs, concentrations of total dissolved phosphorus (TDP) consistently exhibited inverse correlations with %DO that was lower during summer base flows. Particulate phosphorus (PP) concentrations peaked during spring high flow period in both streams and in-line pond/SCMs, but they were also higher during summer base flows in suburban/urban SCMs. Meanwhile, PP areal retention rates and retention efficiencies of the SCMs changed from positive (indicating retention) during high flows to negative (indicating release) during low flows, while such changes across flow were not observed in free-flowing stream reaches. We attribute the changing roles of SCMs from a PP sink to a PP source to changes in SCM hydrologic mass balances, physical sedimentation and biogeochemical mobilization across flows. This study demonstrates that in suburban/urban SCMs, P retained during high flow events can be released during low flows. Cultivation of macrophytes and/or frequent sediment dredging may provide potential solutions to retaining both P and nitrogen in urban SCMs.

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“…Thus, the changes described in Lake Płotycze could be related mainly to changes in the amount and quality of the matter imported from the peat-bog catchment. A hypothetical return of peat bogs surrounding a lake to normal hydration could bring about a return of wetlands to their regular state of phosphorus retention (Reddy et al, 1999;Kieckbusch and Schrautzer, 2007). In the case of wetlands with Sphagnum, intensive retention of calcium also occurs (Hillbricht-Ilkowska et al, 1998;Hehmann et al, 2001).…”

Section: Discussionmentioning

confidence: 99%

Long-term changes in phytoplankton in a humic lake in response to the water level rising: the effects of beaver engineering on a freshwater ecosystem

Pęczuła

Szczurowska

2013

Knowl. Managt. Aquatic Ecosyst.

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Key-words:water level change, humic lake, phytoplankton, beaver, Gonyostomum semen Although water level changes are supposed to be a key factor affecting the functioning of lake ecosystems, knowledge on this topic is scarce, particularly for humic lakes. This paper presents the results of 18 years' research on a small humic lake exposed to hydrological change (rising of the water level), which was induced by spontaneous colonization of the lake by the European beaver (Castor fiber L.). We put forward a hypothesis that this change will be reflected in the quantity and structure of summer phytoplankton due to expected changes in the water chemistry. We noted a statistically significant decrease in total phosphorus and calcium concentrations, electrolytic conductivity, and Secchi disc transparency, and an increase in water color. The phytoplankton structure changed, with cyanoprocaryota and greens decreasing and flagellates increasing. The alteration was observed in a lake which had previously been drained by ditches, so beaver damming appeared to cause the return of the lake to its original endorheic conditions as well as to a water chemistry and phytoplankton structure more typical of undisturbed humic lakes. RÉSUMÉLes changements à long terme dans le phytoplancton d'un lac humique en réponse à la montée des eaux : les effets de l'ingénierie des castors sur l'écosystème d'eau douce Mots-clés : Gonyostomum semenBien que les changements de niveau d'eau soient censés être un facteur clé qui influe sur le fonctionnement des écosystèmes lacustres, les connaissances sur ce sujet sont rares, en particulier pour les lacs humiques. L'article présente les résul-tats d'une recherche de 18 ans sur un petit lac humique exposé au changement hydrologique (montée du niveau de l'eau), qui a été induit par la colonisation spontanée du lac par le castor d'Europe (Castor fiber L.). Nous avons proposé comme hypothèse que ce changement serait reflété dans la quantité et la structure du phytoplancton d'été en raison des changements attendus dans la chimie de l'eau. Nous avons noté une diminution statistiquement significative dans les concentrations en phosphore total et en calcium, la conductivité électrolytique, la transparence mesurée au disque de Secchi et l'augmentation de la couleur de l'eau. La structure du phytoplancton a changé avec une diminution des cyanobactéries et des algues vertes et une augmentation des flagellés. La modification a été observée dans un lac qui avait été préalablement drainé par des fossés, ainsi les barrages de castors semblent provoquer le retour du lac aux conditions endoréiques originales de même que pour la chimie de l'eau et la structure du phytoplancton plus typiques des lacs humiques non perturbés.

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Nitrogen and phosphorus dynamics of a re-wetted shallow-flooded peatland

Cited by 71 publications

References 10 publications

How effective are created or restored freshwater wetlands for nitrogen and phosphorus removal? A systematic review

How effective are created or restored freshwater wetlands for nitrogen and phosphorus removal? A systematic review

Phosphorus Retention in Stormwater Control Structures across Streamflow in Urban and Suburban Watersheds

Long-term changes in phytoplankton in a humic lake in response to the water level rising: the effects of beaver engineering on a freshwater ecosystem

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