The influence of water table fluctuations on nutrient dynamics in the rhizosphere of common reed (Phragmites australis)

2001 ◽  
Vol 44 (11-12) ◽  
pp. 245-250 ◽  
Author(s):  
O. Urbanc-Berčič ◽  
A. Gaberščik
Keyword(s):  
Pore Water ◽  
Phragmites Australis ◽  
Water Table ◽  
Nutrient Dynamics ◽  
Common Reed ◽  
Root Tissue ◽  
Water Level Fluctuations ◽  
Ets Activity ◽  
Water Table Fluctuations ◽  
Influence Of Water

Lake Cerknisÿko jezero is an intermittent lake and thus it is an ecosystem with permanent water level fluctuations. The lake area is covered mainly by wetland vegetation, with a common reed (phragmites australis) as the prevailing species. The present research evaluated the influence of water table fluctuations on nutrient dynamics in the root zone of the reed. The content of nutrients (nitrate, nitrite, ammonium, soluble phosphorus) was monitored in the pore water, using ground samplers. The vitality of roots was determined measuring terminal electron transport (ETS) activity of root tissue on the vertical profile of the root system. The content of organic matter ranged from 33% up to 48% on a soil depth profile of 1 m. During the year nutrients were present on the whole profile. Water table fluctuations influenced the form, concentration and availability of nutrients in pore water and the vitality of roots. The measurements of potential respiration of root tissue (ETS activity) revealed the highest vitality in the upper layer of the rhizosphere.

scholarly journals Influence of Water Table Fluctuation on Natural Source Zone Depletion in Hydrocarbon Contaminated Subsurface Environments

2020 ◽  
Author(s):  
Reem Ismail ◽  
Saeid Shafieiyoun ◽  
Riyadh Al Raoush ◽  
Fereidoun Rezanezhad
Keyword(s):  
Water Table ◽  
Contaminated Soil ◽  
Soil Surface ◽  
Source Zone ◽  
Water Table Fluctuation ◽  
Mass Removal ◽  
Water Table Fluctuations ◽  
Water Conditions ◽  
Static Water ◽  
Influence Of Water

Most of the prediction theories regarding dissolution of organic contaminants in the subsurface systems have been proposed based on the static water conditions; and the influence of water fluctuations on mass removal requires further investigations. In this study, it was intended to investigate the effects of water table fluctuations on biogeochemical properties of the contaminated soil at the smear zone between the vadose zone and the groundwater table. An automated 60 cm soil column system was developed and connected to a hydrostatic equilibrium reservoir to impose the water regime by using a multi-channel pump. Four homogenized hydrocarbon contaminated soil columns were constructed and two of them were fully saturated and remained under static water conditions while another two columns were operated under water table fluctuations between the soil surface and 40 cm below it. The experiments were run for 150 days and relevant geochemical indicators as well as dissolved phase concentrations were analyzed at 30 and 50 cm below the soil surface in all columns. The results indicated significant difference in terms of biodegradation effectiveness between the smear zones exposed to static and water table fluctuation conditions. This presentation will provide an overview of the experimental approach, mass removal efficiency, and key findings.

Reed stands in constructed wetlands: “edge effect” and photochemical efficiency of PS II in common reed

1997 ◽  
Vol 35 (5) ◽  
pp. 143-147 ◽  
Author(s):  
Olga Urbanc-Bercic ◽  
Alenka Gaberšcik
Keyword(s):  
Electron Transport ◽  
Solar Radiation ◽  
Phragmites Australis ◽  
Constructed Wetlands ◽  
Photochemical Efficiency ◽  
Common Reed ◽  
Ps Ii ◽  
Ets Activity ◽  
The Common ◽  
Reed Bed

In this study an attempt has been made to estimate the vitality of the common reed (Phragmites australis) grown in the constructed wetland. The efficiency of solar radiation uptake of leaves was measured and terminal electron transport system (ETS) activity of roots was determined in specimens from different locations on the reed bed. The results showed that photochemical efficiency of PS II, expressed as FvFm ratio, was higher in plants growing in the middle of the well established stand, but it was lower in plants growing in the area permanently flooded with leachate, where plants were significantly lower. Potential respiration of roots on the vertical rhizome decreases with depth, while it showed slight variations when determined at the same depth, but in plants from different locations within three beds of RBTS.

Influence of Water Table Depth on Pore Water Chemistry and Trihalomethane Formation Potential in Peatlands

2016 ◽  
Vol 88 (2) ◽  
pp. 107-117 ◽  
Author(s):  
Rachel Gough ◽  
Peter J. Holliman ◽  
Nathalie Fenner ◽  
Mike Peacock ◽  
Christopher Freeman
Keyword(s):  
Water Chemistry ◽  
Pore Water ◽  
Water Table ◽  
Water Table Depth ◽  
Formation Potential ◽  
Trihalomethane Formation Potential ◽  
Pore Water Chemistry ◽  
Influence Of Water

scholarly journals INFLUENCE OF WATER TABLE FLUCTUATIONS ON FORMATION OF RETAINED AND TRAPPED LIGHT PETROLEUM PRODUCTS

2016 ◽  
Vol 0 (1) ◽  
pp. 112-124
Author(s):  
N.K. Paramonova ◽  
G.I. Golub ◽  
I.N. Zapolskiy ◽  
O.I. Logvinenko ◽  
Yu.A. Negoda
Keyword(s):  
Water Table ◽  
Petroleum Products ◽  
Light Petroleum ◽  
Water Table Fluctuations ◽  
Influence Of Water

Edge effects on water table dynamics in tropical peatlands

2020 ◽  
Author(s):  
Alex Cobb ◽  
Surin Kumar Thamilselvam ◽  
Ramasamy Zulkiflee ◽  
Jeffery Muli Incham ◽  
Khalish Ideris ◽  
...  
Keyword(s):  
Water Table ◽  
Edge Effects ◽  
Water Level Fluctuations ◽  
Model Driven ◽  
Tropical Peat ◽  
Water Table Fluctuations ◽  
Water Tables ◽  
Tropical Peatlands ◽  
Practical Implications ◽  
Range Of Influence

<p>Water level fluctuations affect many ecosystem processes in tropical peatlands, and have important practical implications because low water tables cause decomposition and flammability.  In recent work, we showed that a simplified model driven by precipitation and evapotranspiration can work surprisingly well at predicting water table fluctuations in the interior of ombrotrophic tropical peatlands.  However, a model driven only by precipitation and evaporation cannot give accurate predictions of water table dynamics at the dome edge, where important fire and flood processes occur. Further, changing boundary conditions from tides and seasonal changes in river stage can drive fluctuations that propagate towards the dome interior.  Classic studies of how such fluctuations at edges propagate into the interior of a domain provide solid theory for simple aquifers with constant and uniform transmissivity or conductivity, but tropical peatlands are not described well by these models because of the much higher conductivity of peat near the surface. We explore how precipitation, evapotranspiration, and changes in river or channel stage interact to drive water table fluctuations in tropical peat domes using an exponential transmissivity model previously validated for a tropical peatland.  We discuss these "edge effects" and their frequency-dependent range of influence from fluctuations on diurnal, monthly, annual, and superannual time scales.</p>

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