Nutrient kinetics in submerged plant beds: A mesocosm study simulating constructed drainage wetlands

Olesen, Annica; Jensen, Solvei Mundbjerg; Alnoee, Anette Baisner; Baattrup‐Pedersen, Annette; Lauridsen, Torben L.; Sorrell, Brian K.; Riis, Tenna

doi:10.1016/j.ecoleng.2018.08.012

Cited by 10 publications

(6 citation statements)

References 32 publications

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“…This quick shift to high algal biomass shows potential vulnerability with respect to a regime shift. Olesen et al (2018) found a similar result in a mesocosm study in a constructed wetland. The measured uptake rates of NO 3 -N were similar in habitats with or without plants.…”

Section: Discussionsupporting

confidence: 67%

“…Olesen et al. (2018) found a similar result in a mesocosm study in a constructed wetland. The measured uptake rates of NO 3 ‐N were similar in habitats with or without plants.…”

Section: Discussionmentioning

confidence: 56%

“…The measured uptake rates of NO 3 ‐N were similar in habitats with or without plants. However, the authors did find that PO 4 ‐P uptake was 3–5 times higher in habitats with plants compared to without (Olesen et al., 2018). In terms of salinity, our +salinity treatment salinity was not that much higher than the other treatments (4.5 dS/m compared to 3.8 dS/m on average).…”

Section: Discussionmentioning

confidence: 99%

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Evaluation of nutrient assimilative capacity in waterfowl impoundments: The role of environmental stressors

et al. 2023

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The effectiveness of wetlands in sequestering nutrients and improving water quality relies on a suite of abiotic and biotic conditions. To more fully understand the restraints on nutrient removal, especially salinity and plant cover, we created field‐scale mesocosms and monitored nutrient sequestration with nutrient additions and isotopic pool dilutions over two years in two wetlands near the Great Salt Lake in Utah. Surprisingly, we found no differences in nutrient removal with plant removal, increased salinity, and altered ambient nutrient concentrations, suggesting functional redundancy in associated primary producers. When submerged aquatic vegetation was removed, chlorophyll α concentration (0.1 – 9.0 μg/L) increased while N and P assimilation remained the same as phytoplankton occupied the open niche space. We did find ammonium concentrations to be inversely related to nitrate assimilation—as the ammonium concentration increased, nitrate assimilation decreased, suggesting preferential uptake of ammonium. Last, in our high N and P treatment mesocosms, the nitrate dramatically declined from 43.9 mg/L to background levels (<0.1 mg/L) within one week, showing a high potential for N remediation in these wetlands.This article is protected by copyright. All rights reserved

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Section: Discussionsupporting

confidence: 67%

“…Olesen et al. (2018) found a similar result in a mesocosm study in a constructed wetland. The measured uptake rates of NO 3 ‐N were similar in habitats with or without plants.…”

Section: Discussionmentioning

confidence: 56%

Section: Discussionmentioning

confidence: 99%

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Evaluation of nutrient assimilative capacity in waterfowl impoundments: The role of environmental stressors

et al. 2023

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“…Individuals from each species were planted in different tubs to avoid pseudo replication and thus, the number of shoots in each tub varied between one and six. There was enough distance (>25 cm) between shoots to avoid competition (Olesen et al, 2018). In total 17 tubs were used in the experiment.…”

Section: Methodsmentioning

confidence: 99%

“…However, recent studies suggest that higher biodiversity both in terms of species number and of species growth forms (such as more emergent species, floating leaved and submergent species) can significantly increase nutrient removal from a system due to important differences in their nutrient uptake strategies (e.g. Bouchard et al, 2007;Choudhury et al, 2018;Manolaki et al, 2020) via niche complementarity (Choudhury et al, 2018;Olesen et al, 2018) and the extension of the nutrient period across seasons (Manolaki et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Investigating emergent macrophytes establishment rate and propagation towards constructed wetlands efficacy optimization

Manolaki

Olesen

Hvidt

et al. 2021

Knowl. Manag. Aquat. Ecosyst.

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Constructed wetlands have become a widely used tool for reducing nutrient loading from agriculture drainage water running to aquatic ecosystems. To ensure a high nutrient removal efficiency, it is often suggested to use macrophytes to retain or remove nutrients via uptake and through the denitrifying biofilm. In Europe, Phragmites australis and Typha spp are the most commonly used aquatic plants in constructed wetlands (CWs) with free surface flow, and these species often form monocultures in the wetlands. In order to achieve a more diverse vegetation, there is a need to introduce more plant species. Creating a mass production of plant material reduces both handling time and the risk of depleting and disturbing vegetation in natural habitats such as streams or lakes. However, a successful and continuous production of such material during growing seasons requires knowledge of the selected species' establishment and propagation. We examined the relative growth rate (RGR) of six emergent macrophyte species collected from streams and small lakes located in Mid Jutland (Denmark), in seasonal experiments from March to October in order to determine the most efficient time period for their propagation. We found that all species had highest RGR in June, and that several species showed high growth efficiency from April to August. The results showed that it is possible to have a full production of emergent macrophytes throughout the growing season, and therefore, we suggest to propagate plants for use in constructed wetlands in order to enhance biodiversity and ecosystem functioning.

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Effects of Design and Operational Conditions on the Performance of Constructed Wetlands for Agricultural Pollution Control – Critical Review

Nan

Lavrnić

Mancuso

et al. 2023

Water Air Soil Pollut

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Constructed wetlands (CWs) can be considered as an efficient nature-based solution for the treatment of agricultural drainage water (ADW) and consequently for the mitigation of non-point source pollution. Aiming to provide suggestions for the construction and implementation of CWs, this paper proposes and discusses key parameters of CW design and operation. In order to verify the effect of these features, different case studies were reviewed, focusing on the performance of CWs that are treating agricultural drainage water. The findings showed that design and operational factors (e.g., the application of simple hydraulic structures and vegetation establishment) can improve pollutant removal efficiencies by increasing hydraulic retention time. Hydraulic efficiency of CWs can also be enhanced through certain shape characteristics (e.g., adoption of a high aspect ratio and creation of a long and narrow CW shape). The careful consideration of these parameters before and during CW implementation can therefore help these systems to achieve their full potential. However, further study is recommended to assess the effects of some parameters (e.g., flow direction and the application of deep zones).

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Nutrient kinetics in submerged plant beds: A mesocosm study simulating constructed drainage wetlands

Cited by 10 publications

References 32 publications

Evaluation of nutrient assimilative capacity in waterfowl impoundments: The role of environmental stressors

Evaluation of nutrient assimilative capacity in waterfowl impoundments: The role of environmental stressors

Investigating emergent macrophytes establishment rate and propagation towards constructed wetlands efficacy optimization

Effects of Design and Operational Conditions on the Performance of Constructed Wetlands for Agricultural Pollution Control – Critical Review

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