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Artykuły w czasopismach na temat „Schoenoplectus validus”

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Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 19 lutego 2023

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Tanner, Chris C. "Growth and nutrition of Schoenoplectus validus in agricultural wastewaters". Aquatic Botany 47, nr 2 (luty 1994): 131–53. http://dx.doi.org/10.1016/0304-3770(94)90010-8.

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Pollard, Peter C. "Bacterial activity in plant (Schoenoplectus validus) biofilms of constructed wetlands". Water Research 44, nr 20 (grudzień 2010): 5939–48. http://dx.doi.org/10.1016/j.watres.2010.07.047.

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Zhang, Zhenhua, Zed Rengel i Kathy Meney. "Kinetics of ammonium, nitrate and phosphorus uptake by Canna indica and Schoenoplectus validus". Aquatic Botany 91, nr 2 (sierpień 2009): 71–74. http://dx.doi.org/10.1016/j.aquabot.2009.02.002.

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Tanner, Chris C. "Treatment of Dairy Farm Wastewaters in Horizontal and Up-Flow Gravel-Bed Constructed Wetlands". Water Science and Technology 29, nr 4 (1.02.1994): 85–93. http://dx.doi.org/10.2166/wst.1994.0164.

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The treatment performance of four horizontal and two up-flow pilot-scale constructed wetlands planted with Schoenoplectus validus were investigated over a 20 month period (two winters and two summers) treating dairy parlour wastewaters at a range of loading rates. Removal of BOD.TN and TP were positively correlated with retention time. Reduction of BOD (70 - 90%) and SS (40 - 90%) in relation to loading rate were similar in both flow formats. The horizontal-flow wetlands showed 40 - 90 % reduction of TN and 30 - 80 % reduction of TP. The up-flow wetlands showed reduced levels of TN and TP removal, particularly when the loading rates were increased during the latter 5 months of the trial. Results are compared with those of other published studies of horizontal and upflow wetlands treating NH4-N rich organic wastewaters.

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Zhang, Zhenhua, Zed Rengel i Kathy Meney. "Growth and resource allocation of Canna indica and Schoenoplectus validus as affected by interspecific competition and nutrient availability". Hydrobiologia 589, nr 1 (13.06.2007): 235–48. http://dx.doi.org/10.1007/s10750-007-0733-3.

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Lund, M. A., P. S. Lavery i R. F. Froend. "Removing filterable reactive phosphorus from highly coloured stormwater using constructed wetlands". Water Science and Technology 44, nr 11-12 (1.12.2001): 85–92. http://dx.doi.org/10.2166/wst.2001.0813.

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A constructed wetland design, consisting of 16 repeating cells was proposed for Henley Brook (Perth, Western Australia) to optimise the removal of FRP from urban stormwater. Three replicate experimental ponds (15×5 m), were constructed to represent at a 1:1 scale a single cell from this design. Three 5 m zones of each pond were sampled: shallow (0.3 m) vegetated (Schoenoplectus validus) inflow and outflow zones and a deeper (1 m), V-shaped central zone. In 1998/99, inflows and outflow waters were intensively sampled and analysed for FRP and Total P. In addition, all major pools of P (plants, sediment) within the ponds, and important P removal processes (benthic flux, uptake by biofilm and S. validus) were quantified. A removal efficiency of 5% (1998) and 10% (1999) was obtained for FRP. Initial uptake was mainly in plant biomass, although the sediment became an increasingly important sink. Benthic flux experiments showed that anoxia did not cause release of P from sediments, indicating that most of the P was bound as apatite rather than associated with Fe or Mn. The highly coloured waters were believed responsible for the very low biofilm biomass recorded (<1 g.m-2). We have demonstrated that constructed wetlands can be effective for removing FRP immediately after construction, although their long-term removal capacity needs further research.

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Heritage, Alan, Pino Pistillo, K. P. Sharma i I. R. Lantzke. "Treatment of primary-settled urban sewage in pilot-scale vertical flow wetland filters: comparison of four emergent macrophyte species over a 12 month period". Water Science and Technology 32, nr 3 (1.08.1995): 295–304. http://dx.doi.org/10.2166/wst.1995.0152.

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The treatment of primary treated urban sewage by four emergent macrophytes has been compared over a twelve month period in separate gravel-based vertical flow constructed wetlands (300 litre interstitial volume). Nutrient removal in planted systems was greater than in the unplanted wetland especially for nitrogen and phosphorus and less so for BOD and suspended solids removal. The performance of most planted wetlands (especially Typha orientalis and Schoenoplectus validus) declined into autumn, particularly for nitrogen and phosphorus removal while a decline in plant ET was also observed. Baumea articulata, and to a lesser extent Cyperus involucratus, maintained high ET and nutrient assimilation throughout the trial period. As a consequence of the higher ET, dissolved solids (especially fixed salts) doubled in concentration during flow through wetlands planted with these two species, producing an effluent with a high sodium adsorption ratio and a reduced potential for re-use in irrigation.

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Thomas, P. R., P. Glover i T. Kalaroopan. "An evaluation of pollutant removal from secondary treated sewage effluent using a constructed wetland system". Water Science and Technology 32, nr 3 (1.08.1995): 87–93. http://dx.doi.org/10.2166/wst.1995.0129.

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Pilot scale investigations were carried out to examine the pollutant removal efficiency of a constructed wetland receiving secondary treated sewage effluent. Four constructed wetland cells were established, three of them planted with either Schoenoplectus validus, Juncus ingens or both species of macrophytes, and the fourth serving as an unvegetated control cell. Although there was a significant improvement in the effluent quality during the initial ten month period of monitoring, results to date have not indicated any overall trend for pollutant removal by a particular plant species. Biochemical oxygen demand and chemical oxygen demand removals averaged between 71-75% while suspended solids removals were around 85% in the macrophyte cells. Ammonia reductions were in the range 17-24% but better nitrate reductions between 65-80% were obtained. Phosphorus removal has been low (13%) in all four of the wetland cells and bore hole samples have shown no groundwater contamination with nitrogen or phosphorus from the wetland system to date.

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Zhang, Zhenhua, Zed Rengel i Kathy Meney. "Nutrient Removal from Simulated Wastewater Using Canna indica and Schoenoplectus validus in Mono- and Mixed-Culture in Wetland Microcosms". Water, Air, and Soil Pollution 183, nr 1-4 (7.02.2007): 95–105. http://dx.doi.org/10.1007/s11270-007-9359-3.

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Zhang, Zhenhua, Zed Rengel i Kathy Meney. "Interactive effects of nitrogen and phosphorus loadings on nutrient removal from simulated wastewater using Schoenoplectus validus in wetland microcosms". Chemosphere 72, nr 11 (sierpień 2008): 1823–28. http://dx.doi.org/10.1016/j.chemosphere.2008.05.014.

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Hayball, Nigel, i Meryl Pearce. "Influences of simulated grazing and water-depth on the growth of juvenile Bolboschoenus caldwellii, Phragmites australis and Schoenoplectus validus plants". Aquatic Botany 78, nr 3 (marzec 2004): 233–42. http://dx.doi.org/10.1016/j.aquabot.2003.10.004.

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Domingos, Sergio, Stewart Dallas, Mark Germain i Goen Ho. "Heavy metals in a constructed wetland treating industrial wastewater: distribution in the sediment and rhizome tissue". Water Science and Technology 60, nr 6 (1.09.2009): 1425–32. http://dx.doi.org/10.2166/wst.2009.472.

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This study assessed copper and zinc distribution in the surface layer of sediment and rhizome tissue within the saturated surface vertical flow constructed wetland of CSBP Ltd, a fertiliser and chemical manufacturer located in Western Australia. Sediment and Schoenoplectus validus rhizome samples were collected at various distances from the inlet pipe while water samples are routinely collected. Water samples were analysed for nutrients and metals, sediments were analysed for total and bioavailable metals and rhizomes were analysed for total metals only. Mean influent copper and zinc concentrations were 0.19 mg/L and 0.24 mg/L respectively. The distribution of bioavailable Cu and Zn in the top sediment layer follows a horizontal profile. Analysis of variance (ANOVA) showed that the bioavailable fraction of these metals in sediments near the inlet pipe (30.2 mg/kg Cu and 60.4 mg/kg Zn) is significantly higher than in sediments at the farthest location (10.3 mg/kg Cu and 26.1 mg/kg Zn). The average total Cu concentration in the sediment at the 2 m location has reached the 65 mg/kg trigger value suggested by the Interim Sediment Quality Guidelines (ANZEEC 2000). Cu and Zn concentrations in the rhizome of S. validus do not vary significantly among different locations. Whether Cu and Zn concentrations at the CSBP wetland may reach toxic levels to plants and bacteria is still unknown and further research is required to address this issue. The surface component of the wetland favours sedimentation and binding of metals to the organic matter on the top of the sediment, furthermore, the sediment which tends to be anoxic with reducing conditions acts as a sink for metals.

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Tanner, Chris C., i James P. Sukias. "Accumulation of organic solids in gravel-bed constructed wetlands". Water Science and Technology 32, nr 3 (1.08.1995): 229–39. http://dx.doi.org/10.2166/wst.1995.0145.

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The effects of wastewater loading rate and planting with Schoenoplectus validus (soft-stem bulrush) on the accumulation of organic matter were investigated in four pairs of gravel-bed constructed wetlands. The planted and unplanted wetland pairs, each supplied with a different hydraulic loading of dairy farm wastewaters pre-treated in an anaerobic and aerobic lagoon, had received cumulative suspended solids loadings (∼ 82% volatile) of between ∼ 1.6 and 5.4 kg m−2 over a 22 month period. Vertical and horizontal gradients of organic matter accumulation were sampled by stratified coring, and the impact of solids accumulations on wastewater residence times investigated using bromide as a conservative tracer. Mean accumulations of organic matter in the unplanted wetlands ranged between 0.4 and 2.3 kg m−2, while those in the planted wetlands reached mean levels of nearly 4 kg m−2. Highest levels were recorded in influent zones (up to 9.5 kg m−2) and in the upper 100 mm of the substratum. The effective porosity of the highest loaded wetlands was markedly reduced compared to that in the lowest loaded wetlands, with mean retention times decreasing to around half of their theoretical values (corrected for evapotranspirational water losses). The planted wetlands retained higher apparent gravel porosity, despite greater accumulations of organic matter. High evapotranspiration rates during hot summer days, markedly extended retention times and increased tracer dispersion.

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Gillies, Jane E., Kevin A. Kuehn, Steven N. Francoeur i Robert K. Neely. "Application of the [3H]Leucine Incorporation Technique for Quantification of Bacterial Secondary Production Associated with Decaying Wetland Plant Litter". Applied and Environmental Microbiology 72, nr 9 (wrzesień 2006): 5948–56. http://dx.doi.org/10.1128/aem.00696-06.

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ABSTRACT The radiolabeled leucine incorporation technique for quantifying rates of bacterial production has increased in popularity since its original description for bacterioplankton communities. Prior studies addressing incorporation conditions (e.g., substrate saturation) for bacterial communities in other habitats, such as decaying plant litter, have reported a wide range of final leucine concentrations (400 nM to 50 μM) required to achieve saturation-level uptake. We assessed the application of the [3H]leucine incorporation procedure for measuring bacterial production on decaying wetland plant litter. Substrate saturation experiments (nine concentrations, 10 nM to 50 μM final leucine concentration) were conducted on three dates for microbial communities colonizing the submerged litter of three emergent plant species (Typha angustifolia, Schoenoplectus validus, and Phragmites australis). A modified [3H]leucine protocol was developed by coupling previously described incubation and alkaline extraction protocols with microdialysis (500 molecular weight cutoff membrane) of the final radiolabeled protein extract. The incorporation of [3H]leucine into protein exhibited a biphasic saturation curve, with lower apparent Km values ranging from 400 nM to 4.2 μM depending on the plant species studied. Upper apparent Km values ranged from 1.3 to 59 μM. These results suggest differential uptake by litter-associated microbial assemblages, with the lower apparent Km values possibly representing bacterial uptake and higher apparent Km values representing a combination of both bacterial and nonbacterial (e.g., eukaryotic) uptake.

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Lund, M., J. Davis i F. Murray. "The fate of lead from duck shooting and road runoff in three western Australian wetlands". Marine and Freshwater Research 42, nr 2 (1991): 139. http://dx.doi.org/10.1071/mf9910139.

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This investigation examined whether lead shot from duck shooting was acting as a source of lead in an alkaline wetland ecosystem typical of popular duck-shooting areas in Western Australia. A polluted urban wetland and a pristine wetland were also studied for comparison. Lake Wannamal receives an estimated 82 kg of lead shot per year from duck shooting and no lead from any other known source. Lake Monger was estimated to receive 138 kg of lead per year from road runoff, leachate from a sanitary landfill site, and lead from aerosols. Thomsons Lake has no known source of lead from human activities. Lead concentrations in sediments did not differ significantly (P < 0.05) between Lake Wannamal and Thomsons Lake and apparently represent natural background levels. Lake Monger sediments were contaminated (mean: 192 � 82 �g Pb g-1 dry weight); the main source appeared to be runoff from a nearby freeway. Lead concentrations in Baumea articulata Blake, Typha orientalis Presl and Schoenoplectus validus Love were generally low; concentrations in the roots were higher than those in the leaves, suggesting that lead is poorly translocated. Lead concentrations in submerged macrophytes and in sediments were similar, which may be attributable to periphyton on the plants binding lead in seston resuspended by water turbulence. The cyanobacterium Microcystis sp. accumulated lead to low concentrations, believed to be from soluble lead in the water column. Macroinvertebrates accumulated lead to low concentrations, but no evidence was found of biomagnification. Lead concentrations were only slightly higher in macroinvertebrates in Lake Monger than in macroinvertebrates in the other lakes, indicating that lead uptake was poor even in a contaminated lake.

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Minter, D. W. "Hypohelion scirpinum. [Descriptions of Fungi and Bacteria]." IMI Descriptions of Fungi and Bacteria, nr 134 (1.08.1997). http://dx.doi.org/10.1079/dfb/20056401336.

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Abstract A description is provided for Hypohelion scirpinum. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. DISEASE: Hypohelion scirpinum usually occurs on dead fallen stems and leaves of Schoenoplectus lacustris. Virtually nothing is known about the ecology of this fungus, except for Ingold's observation that its life cycle is entirely aquatic. It seems likely however that, like many other members of the Rhytismataceae, the fungus colonizes the living plant, then fruits on those leaves and stems after they have died. HOSTS: Arundinaria macrosperma (stem), Plantae gen. indet. (leaf), Schoenoplectus lacustris (stem, dead floating stem), Scirpus lacustris var. occidentalis (stem), S. validus (stem), Scirpus sp. (stem). Almost all records are from Schoenoplectus lacustris, many of the others are misidentifications or synonyms for this plant. The record on Arundinaria is questionable. GEOGRAPHICAL DISTRIBUTION: Belgium, Canada (Saskatchewan), France, Germany, Hungary, Italy, Latvia, Russia (Tver Oblast), Sweden, UK (England), Ukraine, USA (Dakota, Mississippi). A temperate northern hemisphere species of low altitude, not very acidic wetlands and slow flowing rivers. Rather infrequently recorded, with numbers of records declining, and some unsuccessful searches for this fungus in apparently suitable habitats in recent years. TRANSMISSION: By air-borne ascospores in humid conditions.

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