Effects of pH on aquatic biodegradation processes

Krachler, Rudolf F.; Stojanovic, Anja; Wielander, B.; Herzig, Alois

doi:10.5194/bgd-6-491-2009

Cited by 20 publications

(27 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The wide range of oxygen saturation was presumably also attributable to occasionally extremely high algal oxygen production and bacterial oxygen consumption. Besides, decomposition may also be faster at higher pH values (Krachler et al, 2009).…”

Section: Discussionmentioning

confidence: 99%

Salinity and ionic composition of the shallow astatic soda pans in the Carpathian Basin

Boros

Horváth

Wolfram³

et al. 2014

Ann. Limnol. - Int. J. Lim.

103

View full text Add to dashboard Cite

-We investigated the chemical characteristics of the astatic soda pans in the Carpathian Basin based on comprehensive new and archive data. Analysed parameters were salinity and ionic composition. The most frequent type of soda waters was the basic alkaline type (Na-HCO 3 ) that represented more than half of the natural soda pans. Besides 11 subtypes occurred. The second and third most frequent types were the chloride (13%) and sulphate subtypes (11%), with the secondary dominance of these anions. The other subtypes meant < 4% of the pans. Magnesium sometimes occurred as a secondary dominant cation beside sodium. Until now, this subtype of soda waters has not been published in any part of the world, because of the general rule of soda lake formation (depending on low levels of magnesium and calcium). We found a regionally constant correction factor [Salinity (mg.L x1 ) = 0.8 r El.Cond. (mS.cm x1 )] for confidentially estimating salinity from electrical conductivity in these habitats. Salinity varied between sub-(0.5-3 g.L x1 ) and hypersaline (> 50 g.L x1 ) ranges, with its mean value (y 4 g.L x1 ) in the hyposaline range (3-20 g.L x1 ). The basic alkaline type had random geographical distribution, while the other subtypes were restricted to certain regions of the Basin. The high number of subtypes reflects the high chemical diversity of alkaline soda pans in the relatively small territory of the Carpathian Basin.

show abstract

Section: Discussionmentioning

confidence: 99%

Salinity and ionic composition of the shallow astatic soda pans in the Carpathian Basin

Boros

Horváth

Wolfram³

et al. 2014

Ann. Limnol. - Int. J. Lim.

103

View full text Add to dashboard Cite

show abstract

“…Krachler et al (2009) had opined that organic mineralization in pond system conversely affects the water pH. Such phenomena were indicative of an efficient nutrient recycling process in the tanks during the initial phase which also probably contributed towards the observed lower fluctuation of water pH.…”

Section: Discussionmentioning

confidence: 99%

“…The aerobic mineralization of organic matter in water tends to yield more carbon dioxide and H + ion that results in reduction of water pH (Boyd, 1996;Krachler, Krachler, Stojanovic, Wielander, & Herzig, 2009). But in the present study, changes in water pH were minimal across the tanks during the initial phase (1-45 days).…”

Section: Discussionmentioning

confidence: 99%

“…In contrast, there was a proportionate reduction in water pH with increasing density in later phase of rearing (46-90 days). Krachler et al (2009) had opined that organic mineralization in pond system conversely affects the water pH. The pH reduction during this phase was probably attributed to such phenomena as there was build-up of organic matter from the input use.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Growth performance of pengba,Osteobrama belangeri(Valenciennes, 1844) and water quality changes during fingerling rearing with varied stocking density in large outdoor concrete tanks

et al. 2019

View full text Add to dashboard Cite

Fingerling rearing of pengba, Osteobrama belangeri, was conducted at varied densities for 90 days in 12 outdoor concrete tanks (10 m × 5 m × 1 m). The tanks, grouped into four triplicated treatments, were stocked with fry at 20, 30, 40 and 50 fry m -3 ;and designated as control, T-1, T-2 and T-3 respectively. Tanks were filled up to 90 cm depth. Evaporation loss compensated fortnightly. Fish sampling and monitoring of water quality parameters done at fortnight intervals. Survival varied between 71.5% and 84.0% in treatments. Both survival and total length significantly reduced with increasing densities from control to T-2 (p < .05), while no differences were observed between T-2 and T-3 (p > .05). Similarly, significant reductions in final body weight and specific growth rate were observed with increased densities and these values further reduced in T-3 than T-2 (p < .05). Such results corroborated the inverse relationship between stocking density and growth. Gross biomass yields in two higher densities (T-2 and T-3), despite their lower survivals, were significantly higher than the two lower densities. The numbers of fingerlings harvested were 35, 74 and 112% higher than the control in T-1, T-2 and T-3 respectively. The lowest size obtained even at the highest density (T-3) was of 7.0 ± 1.0 cm and 3.99 ± 0.17 g, which can be considered as ideal grow-out stocking size of pengba. Therefore, the study showed feasibility of stocking up to 50 fry m -3 for rearing from fry to fingerling stage. However, the other lower densities may be used in case of requirement of larger fingerlings. K E Y W O R D Sconcrete tank, fingerling, pengba, stocking density, water quality

show abstract

“…correlation of CDOM and DOC to conductivity and pH as both are also expected 510 to increase with decreasing water levels due to the concentration of inorganic ions. Furthermore, 511 considering the pH dependence of the dry matter loss from macrophyte litter(Krachler et al, 2010), the higher pH of the period could have further aggravated the OM release from the dense 513 B. maritimus dominated macrophyte cover of Sósér contributing to the measured record high 514 DOC levels. Turbidity positively correlated with DOC suggesting that in this otherwise low turbidity pan (TSS in Zab-szék was almost 20 times higher than in Sósér;Fig.…”

mentioning

confidence: 99%

Macrophyte cover type and groundwater as the key drivers of the extremely high organic carbon concentration of soda pans

Boros¹,

Balogh²,

Csitári³

et al. 2019

Preprint

View full text Add to dashboard Cite

1.Endorheic soda pans are among the aquatic systems that have the highest dissolved organic carbon (DOC) content on the planet with concentrations reaching values close to 1 g L−1. Considering the importance of inland waters in the global carbon cycle, the understanding of the drivers of such outstanding aquatic organic carbon pools is eminent. The soda pans of the Carpathian Basin present a wide variability of biotic and abiotic characteristics that provides an adequate system to assess the determinants of the extreme high DOC concentrations of soda pans. Here we demonstrate through a multisite comparison, a multiyear seasonal monitoring, and a laboratory experiment that the dissolved organic matter content of the highest DOC concentration soda pans is primarily of groundwater and emergent macrophyte origin.2.More precisely, the multisite comparison of 14 soda pans revealed that the variation of colored dissolved organic matter (CDOM) content of the pans is partially explained by the CDOM content (21% of variation) and conductivity (14%) of the local groundwater indicating significant role of allochthonous terrestrial DOC sources. However, 46% of the variation in CDOM content of the studied soda pans could be accounted for the dominant type of emergent macrophyte with Bolboshoenus maritimus dominated macrophyte cover leading to higher CDOM content than Phragmites australis. 3.In line with the results of the multisite comparison, we demonstrated by a decomposition experiment that both B. maritimus and P. australis have the potential to release substantial amount of organic matter into soda pans. However, the organic matter release of B. maritimus is much more intensive than that of P. australis leading to twice as high DOC and 3.5-times higher CDOM concentrations. In general, considering previous organic matter release studies we concluded that P. australis is a relatively low organic matter releaser emergent macrophyte, and therefore the species composition of emergent macrophytes has to be considered in autochthonous plant-derived DOM estimations.4.Finally, the multi-year seasonal monitoring of two distinctive soda pans showed that the high organic matter concentrations of the pans depends not only on their intrinsic characteristics but also on interannual variability. More precisely, we demonstrated that the highest CDOM and DOC concentrations occurred in a colored (i.e., brown, low TSS) soda pan that had extensive (95%) macrophyte cover dominated by B. maritimus in a period characterized by high pH due to low water levels, which were presumably the consequence of increased evaporation due to decreased precipitation and above average temperature. Considering the trends of climate change in Central-Europe (i.e., increased temperature and modified precipitation regimes), our results indicate that extremely high organic matter concentrations in soda pans might become more frequent in the near future.

show abstract

Effects of pH on aquatic biodegradation processes

Cited by 20 publications

References 16 publications

Salinity and ionic composition of the shallow astatic soda pans in the Carpathian Basin

Salinity and ionic composition of the shallow astatic soda pans in the Carpathian Basin

Growth performance of pengba,Osteobrama belangeri(Valenciennes, 1844) and water quality changes during fingerling rearing with varied stocking density in large outdoor concrete tanks

Macrophyte cover type and groundwater as the key drivers of the extremely high organic carbon concentration of soda pans

Contact Info

Product

Resources

About