Interactive effects of pH, temperature and light during ammonia toxicity events in<i>Elodea canadensis</i>

Netten, J.J.C.; Heide, Tjisse van der; Smolders, Alfons J. P.

doi:10.1080/02757540.2013.769971

Cited by 27 publications

(14 citation statements)

References 46 publications

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“…In the present study, the natural concentrations of total ammonia in the 14 studied lakes varied widely, with values up to 0.77 mg/L (43 µM). This value is below the toxicity threshold but could represent a problem of concern in the future, given the reported increase of these compounds in aquatic systems [51,52]. High ammonium loads can also enhance the development of primary producers.…”

Section: Discussionmentioning

confidence: 98%

Ammonium Transformation in 14 Lakes along a Trophic Gradient

Leoni

Patelli

Soler

et al. 2018

Water

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Ammonia is a widespread pollutant in aquatic ecosystems originating directly and indirectly from human activities, which can strongly affect the structure and functioning of the aquatic foodweb. The biological oxidation of NH 4 + to nitrite, and then nitrate is a key part of the complex nitrogen cycle and a fundamental process in aquatic environments, having a profound influence on ecosystem stability and functionality. Environmental studies have shown that our current knowledge of physical and chemical factors that control this process and the abundance and function of involved microorganisms are not entirely understood. In this paper, the efficiency and the transformation velocity of ammonium into oxidised compounds in 14 south-alpine lakes in northern Italy, with a similar origin, but different trophic levels, are compared with lab-scale experimentations (20 • C, dark, oxygen saturation) that are performed in artificial microcosms (4 L). The water samples were collected in different months to highlight the possible effect of seasonality on the development of the ammonium oxidation process. In four-liter microcosms, concentrations were increased by 1 mg/L NH 4 + and the process of ammonium oxidation was constantly monitored. The time elapsed for the decrease of 25% and 95% of the initial ion ammonium concentration and the rate for that ammonium oxidation were evaluated. Principal Component Analysis and General Linear Model, performed on 56 observations and several chemical and physical parameters, highlighted the important roles of total phosphorus and nitrogen concentrations on the commencement of the oxidation process. Meanwhile, the natural concentration of ammonium influenced the rate of nitrification (µg NH 4 + /L day). Seasonality did not seem to significantly affect the ammonium transformation. The results highlight the different vulnerabilities of lakes with different trophic statuses.

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Section: Discussionmentioning

confidence: 98%

Ammonium Transformation in 14 Lakes along a Trophic Gradient

Leoni

Patelli

Soler

et al. 2018

Water

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“…Percent NH 3 increases with temperature and pH. Both temperature and pH increase the NH 3 concentration (Nettena et al, 2013). In general, more NH 3 and greater toxicity exists at higher pH, which implies that NH 3 is more dependent of pH than temperature.…”

Section: Introductionmentioning

confidence: 94%

“…This is because the percent of toxic un-ionized NH 3 increases with pH (Frank, 1998). NH 3 toxicity will become more pronounced under higher temperatures, but that effect on aquatic macrophytes will strongly depend on pH of the water layer and specific metabolic adaptations of different species (Nettena et al, 2013). However, less concentration of this NH 3 can be tolerated at lower pH (Frank, 1998).…”

Section: Introductionmentioning

confidence: 99%

The Effect of Ammonia on Growth and Survival Rate of <i>Tilapia rendalli</i> in Quail Manured Tanks

Sakala¹,

Musuka²

2014

ija

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“…Other factors are known to influence the degree of ammonia toxicity in plant tissues. For instance, Netten et al (2013) reported that light and temperature also had significant effects on toxicity of ammonia in Elodea Canadensis. While temperature and water column ammonia concentration are not issues for the spring ecosystems discussed here (Munch et al 2006), the availability of NO x -N can provide excessive nitrogen to SAV.…”

Section: Ammonia Toxicitymentioning

confidence: 99%

Untitled

2016

WATER

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Current observations of water quality in groundwater discharge from springs in Florida show anthropogenic enrichment of nitrate plus nitrite (NO x -N) generally attributed to fertilizer application and/or wastewater or manure sources in individual spring sheds. Excessive levels of NO x -N have been implicated in eutrophication of, and observed changes in, submerged aquatic vegetation (SAV) communities in several spring runs. While the indirect effects of nitrogen (N) enrichment on SAV, are well-documented (i.e., algal productivity resulting in shading of macrophytes), there is considerably less information available concerning direct effects of NO x -N such as toxicity or inhibition of macrophyte growth. This manuscript constitutes a review of the pertinent literature and synthesis of the current understanding of elevated NO x -N in aquatic systems and the effects on SAV as viewed from the prevailing eutrophication paradigm, as well as, explores the hypothesis that NO x -N may have direct inhibitory effects on SAV growth in Florida springs.

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Interactive effects of pH, temperature and light during ammonia toxicity events inElodea canadensis

Cited by 27 publications

References 46 publications

Ammonium Transformation in 14 Lakes along a Trophic Gradient

Ammonium Transformation in 14 Lakes along a Trophic Gradient

The Effect of Ammonia on Growth and Survival Rate of <i>Tilapia rendalli</i> in Quail Manured Tanks

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