Hydrology and aquatic habitat characteristics of a riverine swamp: I. Influence of flow on water temperature and chemistry

Sabo, Matthew J.; Bryan, Christopher; Kelso, William E.; Rutherford, D. Allen

doi:10.1002/(sici)1099-1646(199911/12)15:6<505::aid-rrr553>3.0.co;2-v

Cited by 40 publications

(38 citation statements)

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“…In turn, these processes are affected by incoming solar radiation (photosynthesis), water temperature (respiration) and flow velocity, turbulence and wind speed (physical gaseous exchange) (Ginot and Herve, 1994). Additional effects such as an increase in dissolved oxygen concentration with decreasing water depth have also been observed in other studies (Sabo et al, 1999). Solar radiation and water temperature show a high degree of similarity in the two years (Fig.…”

Section: Discussionsupporting

confidence: 78%

Seasonal and diurnal hydro-chemical variations in a recreated reed bed

Stratford

McCartney

Williams

2004

Hydrol. Earth Syst. Sci.

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The widespread loss and degradation of UK wetlands over the last 200 years has resulted in a loss of habitat for wading and migrating birds To help stem this decline, wetland areas are now being preserved and where possible created. This study investigated water quality in a recreated reed bed in south-west England designed specifically to provide habitat for birds. Since June 2000, continuous measurements of temperature, pH, electrical conductivity and dissolved oxygen have been logged. These data enable the partial pressure of CO 2 to be calculated. This paper looks at the data collected up to November 2001. Despite similar solar radiation and water temperature conditions in both 2000 and 2001, peak summertime values of dissolved oxygen dropped from >100% to <50% and pH values dropped from >7.7 to <7.2. Both also show a reduction in diurnal variation. Over the same period, the average partial pressure of CO 2 increased from 19.7 to 56.1. Analysis of the diurnal dissolved oxygen curves indicates a decrease in photosynthesis which, in the absence of a change in nutrient concentrations in the water, may result from surface plant growth or from a reduction in submerged plant cover. The implications of these changing hydro-chemical conditions are that the site will be less able to support such a wide diversity of aquatic fauna, which will reduce the effectiveness of the site as a habitat for some bird species.

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Section: Discussionsupporting

confidence: 78%

Seasonal and diurnal hydro-chemical variations in a recreated reed bed

Stratford

McCartney

Williams

2004

Hydrol. Earth Syst. Sci.

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“…In other riparian wetland ecosystems, fl ood pulses have been shown to decrease spatial variability of water quality parameters (Bayley et al, 1985;Sabo et al, 1999). While it appeared this this may have occurred in the experimental wetlands during this study to a small extent (Figure 7b), the impact of pulsing in the transverse gradient from deepwater to shallow water was insignifi cant.…”

Section: Infl Ow-outfl Ow and Shallow-deep Gradientsmentioning

confidence: 99%

Aquatic metabolism as an indicator of the ecological effects of hydrologic pulsing in flow-through wetlands

Tuttle

Zhang

Mitsch

2008

Ecological Indicators

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Water column metabolism is a major component in the functioning of wetland ecosystems and can be used as an indicator of ecosystem health. The effect of hydrologic pulsing on water column metabolism was studied with two yearʼs field data and a validated model for two 1-ha created riparian wetlands at the Olentangy River Wetland Research Park at the Ohio State University, in Columbus, OH, USA. Aquatic gross primary productivity (GPP) was measured during hydrologic pulses the first week of April, May and June of 2004 and compared to GPP during steady flow-conditions in April, May and June 2005. Pulses reduced diurnal variation of water temperature, pH and dissolved oxygen (DO), and negatively affected GPP rates. Mean GPP measured during hydrologic flood pulses was 5.13 ± 0.3 kcal m -2 d -1 , which was significantly lower than that measured for comparable months with steady-flow hydrology (11.4 ±0.7 kcal m -2 d -1 ). Solar corrected productivity values of 0.08 ± 0.01% of solar energy during pulses and 0.2 ± 0.02% for steady-flow conditions were also significantly different. Different hyperbolic curves of optimum productivity with water temperature were seen for pulsing and steady-flow conditions. A simulation model with hydrology, metabolism, and DO sub models was was calibrated with 2005 steadyflow year data and validated with 2004 pulse year data. Results from both the field study and model simulations suggest that there was a threshold hydraulic inflow rate between 30 and 50 cm d -1 where aquatic metabolism became negatively affected due to direct and indirect effects of the hydrologic pulse.

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“…Dissolved oxygen, an essential parameter for the survival of most aquatic organisms, showed strong variation between the beginning and end of the rainy season and especially between the sampling sites associated with different combinations of soil characteristics and phytophysiognomies. The highest oxygen values occurred predominantly in plots associated to grassy-woody campinarana vegetation, where there is a reduced amount of organic matter in the soil, possibly resulting in a lower amount of decomposing organic matter and contributing to a lower seasonal depletion of dissolved oxygen (Hamilton et al, 1995;Sabo et al, 1999).…”

Section: Discussionmentioning

confidence: 99%

The influence of rain in limnological characteristics of Viruá wetlands, Brazilian Amazon

2014

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Aim: Floodplains occupy a vast area of the Amazon basin but little is known of how their physical and limnological characteristics respond to local and regional ecological processes. In the Negro River basin and its main tributary, the Branco River, there are large areas that are seasonally flooded by water from local rainfall and that are not directly connected to major rivers. One such area is the floodplain of Viruá National Park, in Roraima state, northern Brazil. Methods: The physical and chemical limnological characteristics of 19 plots in this area were monitored over three years (2008)(2009)(2010), with samples collected each year at the beginning and end of the rainy season (May to August). Results: The water bodies studied had low mean values for electrical conductivity (22.0 ± 14.0 µS*cm -1 ) and pH (4.8 ± 0.7), relatively high temperatures (26.6 ± 2.7 °C), and moderate values for dissolved oxygen saturation (43.0 ± 21.5%) and water transparency (87.9 ± 38.7 cm). There was no significant difference in the limnological characteristics of the aquatic plots between the beginning and end of the rainy seasons in 2008 and 2010, but there were significant differences in 2009 due to an atypical rainfall pattern with two short dry spells during the rainy season. Multivariate analysis showed that the highest temporal variations in the limnological characteristics of the aquatic plots resulted from changes in water transparency, and these changes were related to soil type, elevation of the plot, and the particular micro-basins to which they were connected. Conclusions: This dynamic is different from that of most floodplains in the Amazon region, where the limnological pattern is well-defined seasonally and strongly dependent on the direct connectivity to large river systems. Floodplains not connected to large rivers should receive special attention in relation to the expected impacts of global climate change because of their high dependence on local rainfall.Keywords: water transparency, seasonal variation, wetland, Branco River basin, Viruá National Park, temporary ponds. Resumo: Objetivos:As planícies alagáveis da Amazônia ocupam uma vasta área e compreender os padrões das características limnológicas dessas planícies é de grande importância para os processos ecológicos locais e regionais. Na bacia do rio Negro e de seu principal afluente, o rio Branco, há grandes áreas sazonalmente alagadas que são abastecidas principalmente por chuvas locais e não são conectadas diretamente com grandes rios. Uma dessas áreas é a planície alagável do Parque Nacional do Viruá, em Roraima, no extremo norte do Brasil. Métodos: Foram monitoradas as características físicas e limnológicas de 19 parcelas durante três anos (2008 -2010), com coletas realizadas no início e no fim do período de chuvas (maio -agosto). Resultados: Os corpos d'água estudados apresentaram baixos valores médios de condutividade elétrica (22.0 ± 14,0 µS*cm -1 ) e pH (4.8 ± 0.7). A temperatura foi relativamente alta (26.6 ± 2.7 °C) e o oxigênio dis...

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Hydrology and aquatic habitat characteristics of a riverine swamp: I. Influence of flow on water temperature and chemistry

Cited by 40 publications

References 11 publications

Seasonal and diurnal hydro-chemical variations in a recreated reed bed

Seasonal and diurnal hydro-chemical variations in a recreated reed bed

Aquatic metabolism as an indicator of the ecological effects of hydrologic pulsing in flow-through wetlands

The influence of rain in limnological characteristics of Viruá wetlands, Brazilian Amazon

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