Environmental context determines nitrate toxicity in Southern toad (Bufo terrestris) tadpoles

Edwards, Thea M.; McCoy, Krista A.; Barbeau, Tamatha R.; McCoy, Michael; Thro, John Matthew; Guillette, Louis J.

doi:10.1016/j.aquatox.2006.02.003

Cited by 50 publications

(36 citation statements)

References 34 publications

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“…Johansson et al (2001), Sullivan and Spence (2003), Edwards et al (2006), andGrifis-Kyle (2007) similarly reported that the duration of metamorphosis increased considerably in the presence of nitrogen. However, in studies canied out with various amphibian species (Pseudaris triseriata [Hecnar 19951, Bufo bufo [Xu and Oldham 19971, and Triturus ' "1 * D Pond Concentration ( m a ) Figure 6.…”

Section: Discussionmentioning

confidence: 95%

Intraspecific Differences in Responses of Marsh Frog (Pelophylax ridibundus) Tadpoles Exposed to Environmentally Relevant and Acute Levels of Ammonium Nitrate Fertilizer

Karaoglu¹,

Kutrup²,

Öğüt³

2010

Journal of Freshwater Ecology

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Section: Discussionmentioning

confidence: 95%

Intraspecific Differences in Responses of Marsh Frog (Pelophylax ridibundus) Tadpoles Exposed to Environmentally Relevant and Acute Levels of Ammonium Nitrate Fertilizer

Karaoglu¹,

Kutrup²,

Öğüt³

2010

Journal of Freshwater Ecology

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“…Increasing fertilizer use has led to an increase in the two major fertilizer components, nitrogen and phosphorous, in the soil and wetlands of agricultural regions (Bennett et al, 2004;Puckett, 1995). Detrimental effects of both these anthropogenic contaminants have been observed in studies on various non-target aquatic organisms, most notably amphibians (Edginton et al 2004;Edwards et al, 2006;Griffis-Kyle, 2006;Relyea, 2004). However, the effects of concurrent exposure in natural systems are largely unknown, of concern, and in need of investigation.…”

Section: Introductionmentioning

confidence: 97%

The response of amphibian larvae to exposure to a glyphosate-based herbicide (Roundup WeatherMax) and nutrient enrichment in an ecosystem experiment

Edge

Thompson

Hao

et al. 2014

Ecotoxicology and Environmental Safety

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“…Besides lethal effects, ammonium nitrate has been suggested to alter amphibian endocrine system, affecting development and other functions (Guillette Edwards, 2005;Edwards et al, 2006;Orton et al, 2006), and also to affect central nervous system and impair anti-predatory ability of tadpoles (Ortiz-Santaliestra et al, 2010). Although we did not analyse sublethal effects because of the high mortality recorded in almost all tested ammonium nitrate concentrations, the potential of these sublethal effects occurring at lower concentrations to affect larval survival probabilities in the wild needs further investigation.…”

Section: Discussionmentioning

confidence: 99%

Impacts of ammonium nitrate on survival of tadpoles of the common skittering frog (Euphlyctis cyanophlyctis)

Bibi¹,

Saeed²,

Akram³

et al. 2016

Basic Appl Herpetol

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Amphibians are sensitive to agricultural chemicals such as pesticides and fertilizers. Data on responses of anuran species commonly found in agricultural areas of Pakistan to chemical pollution are lacking. We studied the effects of ammonium nitrate on survival of tadpoles of common skittering frog (Euphlyctis cyano p hlyctis). Tadpoles were collected from seasonal shallow water ponds formed during rainy season in the vicinities of Rawalpindi and Islamabad cities. Tadpoles were treated with ammonium nitrate at either 62.5, 125, 250, 500 or 1000 mg nitrate / l, and compared with a control group. Individual survival was significantly affected by increased ammonium nitrate treatments (P < 0.05), with survival rates after 18 days of exposure ranging from 83% at 62.5 mg NO3 -/ l to complete mortality at the highest ammonium nitrate concentration. The logistic regression model with individual survival as a binomial outcome variable and fertilizer concentration as independent variable explained 87% of the variance in survivorship (Nagelkerke R 2 ), and correctly classified 94.0% of the cases (χ 2 = 259, 5 d.f., P < 0.0005). Our lab-based findings suggest that ammonium nitrate at high concentrations may affect anuran species of Pakistan in croplands with extensive nitrogen-based fertilizer use.Key words: ammonium nitrate; Dicroglossidae; regression; survivorship; tadpoles. Impacto del nitrato amónico sobre la supervivencia de las larvas de Euphlyctis cyanophlyctis.Los anfibios son sensibles a los efectos de algunos agroquímicos como plaguicidas y fertilizantes. Investigamos los efectos del nitrato amónico sobre la supervivencia de las larvas de Eup hlyctis cyanophlyctis. Colectamos los renacuajos de charcas someras estacionales que se forman durante la estación lluviosa en las proximidades de las ciudades de Rawalpindi e Islamabad. Los renacuajos se trataron con nitrato amónico a un de las siguientes concentraciones: 62,5, 125, 250, 500 ó 1000 mg nitrato / l, comparando además con un grupo control. La supervivencia de los individuos se vio afectada de manera significativa por el incremento en las concentraciones de nitrato amónico (P < 0,05), con tasas de supervivencia que tras 18 días de exposición variaron entre el 83% a 62,5 mg NO3 -/ l hasta la mortalidad total en la concentración más elevada de nitrato amónico. El modelo de regresión logística con la mortalidad de los individuos como respuesta binomial y la concentración de fertilizante como variable independiente explicó el 87% de la varianza de la supervivencia (R 2 Nagelkerke), clasificando correctamente un 94% de los casos (χ 2 = 259, 5 g.l., P < 0.0005). Nuestras observaciones en el laboratorio sugieren que las elevadas concentraciones de nitrato amónico po-

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Environmental context determines nitrate toxicity in Southern toad (Bufo terrestris) tadpoles

Cited by 50 publications

References 34 publications

Intraspecific Differences in Responses of Marsh Frog (Pelophylax ridibundus) Tadpoles Exposed to Environmentally Relevant and Acute Levels of Ammonium Nitrate Fertilizer

Intraspecific Differences in Responses of Marsh Frog (Pelophylax ridibundus) Tadpoles Exposed to Environmentally Relevant and Acute Levels of Ammonium Nitrate Fertilizer

The response of amphibian larvae to exposure to a glyphosate-based herbicide (Roundup WeatherMax) and nutrient enrichment in an ecosystem experiment

Impacts of ammonium nitrate on survival of tadpoles of the common skittering frog (Euphlyctis cyanophlyctis)

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