Chronic Exposure of
            <i>Rana pipiens</i>
            Tadpoles to UVB Radiation and the Estrogenic Chemical 4-
            <i>tert</i>
            -octylphenol

Croteau, Maxine C.; Martyniuk, Christopher J.; Trudeau, Vance L.; Lean, D. R. S.

doi:10.1080/15287390701613330

Cited by 20 publications

(28 citation statements)

References 55 publications

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“…Whether sublethal UVR effects similarly reduce fitness and contribute to reduced recruitment is less well known, but seems probable. Croteau et al [58] demonstrated that UVR-induced spinal curvature in tadpoles ultimately causes them to starve to death because their swimming ability is compromised and thus are unable to forage. UVR-induced malformations of the eyes and limbs may also negatively affect foraging ability, predator evasion, and reproductive success, but these possibilities have not been tested directly.…”

Section: Effects Of Uvr On Amphibiansmentioning

confidence: 99%

“…Only two studies that we know of have used predation trials to determine that exposure to increased UVR increases the susceptibility of tadpoles to predation [66,67]. Romansic et al [67] attributed this increased susceptibility to predation to UVR-induced tail deformities that may have impaired tadpole swimming Xenopus laevis Artificial lamps [196] Limb and digit malformations Hypsiboas pulchellus Artificial lamps [69] Lithobates pipiens Ambient sunlight [185,186] Artificial lamps [58,200] Rana temporaria Artificial lamps [63] Jaw malformations Hypsiboas pulchellus Artificial lamps [69] Locomotion performance…”

Section: Effects Of Uvr On Amphibiansmentioning

confidence: 99%

“…Spinal curvature Ambystoma macrodactylum Ambient sunlight [191] Anaxyrus boreas Artificial lamps [194,195] Hypsiboas pulchellus Artificial lamps [69] Limnodynastes peronii Artificial lamps [65] Lithobates clamitans Artificial lamps [93] Lithobates pipiens Artificial lamps [58] Lithobates sylvaticus Ambient sunlight [188] Artificial lamps [93] Pleurodema bufoninum Ambient sunlight [92] Artificial lamps [92] Pseudacris regilla Artificial lamps [102] Rana temporaria Artificial lamps [63] Rhinella arenarum Artificial lamps [187] Xenopus laevis Artificial lamps [196] Edema Ambystoma macrodactylum Ambient sunlight [191] Lithobates pipiens Artificial lamps [58] Lithobates sylvaticus Ambient sunlight [188] Pleurodema bufoninum Ambient sunlight [92] Artificial lamps [92] Pseudacris regilla Artificial lamps [102] Rana cascadae Artificial lamps [102] Rhinella arenarum Artificial lamps [187] Underdeveloped gills Rhinella arenarum Artificial lamps [187] Eye abnormalities Anaxyrus boreas Artificial lamps [194,195] Lithobates pipiens Ambient sunlight [185] Rana aurora Ambient sunlight plus artificial lamps [198] Rana cascadae Artificial lamps [199] Pseudacris regilla Ambient sunlight plus artificial lamps [198] several amphibian species in North America, Europe, Australia and South America. However, UVR sensitivity varies among life stages, populations and species for many response variables [11].…”

Section: Effects Of Uvr On Amphibiansmentioning

confidence: 99%

“…Briefly, field and laboratory studies have shown that exposure to UVR can reduce survival, reduce growth, slow the rate of development, induce developmental malformations and abnormalities, reduce locomotor performance, and cause changes in metabolic rate and behaviour (Table 1). Such lethal and sublethal UVR effects have been observed in the embryos, larvae, metamorphs and adults of Limnodynastes peronii Artificial lamps [147] Lithobates sylvaticus Artificial lamps [93] Litoria aurea Ambient sunlight [177] Pseudacris cadaverina Ambient sunlight [179] Rana aurora Ambient sunlight plus artificial lamps [96] Rana cascadae Ambient sunlight [100] Taricha torosa Ambient sunlight [179] Reduced larval survival Ambystoma laterale Ambient sunlight plus artificial lamps [181] Ambystoma macrodactylum Artificial lamps [78,182] Ambystoma maculatum Ambient sunlight plus artificial lamps [181] Anaxyrus americanus Ambient sunlight plus artificial lamps [181] Artificial lamps [93] Bufo bufo Ambient sunlight [180,183] Crinia signifera Ambient sunlight [114] Hyla versicolor Ambient sunlight plus artificial lamps [181] Artificial lamps [93] Hypsiboas pulchellus Artificial lamps [69] Ichthyosaura alpestris Ambient sunlight [81] Artificial lamps [81] Limnodynastes peronii Artificial lamps [62,65] Lithobates clamitans Ambient sunlight [184] Ambient sunlight plus artificial lamps [181] Artificial lamps [93] Lithobates pipiens Ambient sunlight [184][185][186] Artificial lamps [58] Lithobates septentrionalis Ambient sunlight [184] Lithobates sylvaticus Ambient sunlight [188] Ambient sunlight plus artificial lamps …”

Section: Effects Of Uvr On Amphibiansmentioning

confidence: 99%

See 3 more Smart Citations

Drivers of amphibian declines: effects of ultraviolet radiation and interactions with other environmental factors

Alton

Franklin

2017

Clim Chang Responses

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As a consequence of anthropogenic environmental change, the world is facing a possible sixth mass extinction event. The severity of this biodiversity crisis is exemplified by the rapid collapse of hundreds of amphibian populations around the world. Amphibian declines are associated with a range of factors including habitat loss/ modification, human utilisation, exotic/invasive species, environmental acidification and contamination, infectious disease, climate change, and increased ultraviolet-B radiation (UVBR) due to stratospheric ozone depletion. However, it is recognised that these factors rarely act in isolation and that amphibian declines are likely to be the result of complex interactions between multiple anthropogenic and natural factors. Here we present a synthesis of the effects of ultraviolet radiation (UVR) in isolation and in combination with a range of naturally occurring abiotic (temperature, aquatic pH, and aquatic hypoxia) and biotic (infectious disease, conspecific density, and predation) factors on amphibians. We highlight that examining the effects of UVR in the absence of other ecologically relevant environmental factors can greatly oversimplify and underestimate the effects of UVR on amphibians. We propose that the pathways that give rise to interactive effects between multiple environmental factors are likely to be mediated by the behavioural and physiological responses of amphibians to each of the factors in isolation. A sound understanding of these pathways can therefore be gained from the continued use of multi-factorial experimental studies in both the laboratory and the field. Such an understanding will provide the foundation for a strong theoretical framework that will allow researchers to predict the combinations of abiotic and biotic conditions that are likely to influence the persistence of amphibian populations under future environmental change.

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Section: Effects Of Uvr On Amphibiansmentioning

confidence: 99%

Section: Effects Of Uvr On Amphibiansmentioning

confidence: 99%

Section: Effects Of Uvr On Amphibiansmentioning

confidence: 99%

Section: Effects Of Uvr On Amphibiansmentioning

confidence: 99%

See 2 more Smart Citations

Drivers of amphibian declines: effects of ultraviolet radiation and interactions with other environmental factors

Alton

Franklin

2017

Clim Chang Responses

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show abstract

“…their fitness). One study that has done so demonstrated that UV-B-induced spinal curvature in tadpoles can ultimately lead to death by causing them to swim in circles and thus preventing them from foraging [11]. Similarly, other UV-B-induced malformations and abnormalities such as oedema or bloating [21,22], eye abnormalities [23,24] and hindlimb malformations [12] may also negatively affect foraging ability, predator evasion and reproductive success, but, critically, these possibilities have not been tested directly.…”

Section: Introductionmentioning

confidence: 99%

A small increase in UV-B increases the susceptibility of tadpoles to predation

2011

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Increased ultraviolet-B (UV-B) radiation as a consequence of ozone depletion is one of the many potential drivers of ongoing global amphibian declines. Both alone and in combination with other environmental stressors, UV-B is known to have detrimental effects on the early life stages of amphibians, but our understanding of the fitness consequences of these effects remains superficial. We examined the independent and interactive effects of UV-B and predatory chemical cues (PCC) on a suite of traits of Limnodynastes peronii embryos and tadpoles, and assessed tadpole survival time in a predator environment to evaluate the potential fitness consequences. Exposure to a 3 to 6 per cent increase in UV-B, which is comparable to changes in terrestrial UV-B associated with ozone depletion, had no effect on any of the traits measured, except survival time in a predator environment, which was reduced by 22 to 28 per cent. Exposure to PCC caused tadpoles to hatch earlier, have reduced hatching success, have improved locomotor performance and survive for longer in a predator environment, but had no effect on tadpole survival, behaviour or morphology. Simultaneous exposure to UV-B and PCC resulted in no interactive effects. These findings demonstrate that increased UV-B has the potential to reduce tadpole fitness, while exposure to PCCs improves their fitness.

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Preexposure to ultraviolet B radiation and 4-tert-octylphenol affects the response of Rana pipiens tadpoles to 3,5,3′-triiodothyronine

Croteau

Duarte‐Guterman

Lean

et al. 2010

Environmental Toxicology and Chemistry

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Exposure to multiple environmental stressors is negatively impacting the health of amphibians worldwide. Increased exposure to ultraviolet B radiation (UVBR) and chemical pollutants may affect amphibian populations by disrupting metamorphosis; however, the actual mechanisms by which these stressors affect development remain unknown. Because amphibian metamorphosis is controlled by thyroid hormones (TH), changes in developmental rates by environmental stress suggest a disruption of the thyroid system. Tadpoles were chronically exposed to environmental levels of UVBR (average of 0.15 W/m2) and 4-tert-octylphenol (OP; 10 nM), alone and combined, prior to being challenged to exogenous TH triiodothyronine (T3; 5 or 50 nM). This experimental approach was taken to determine whether exposure to these stressors affects the ability of T3 to elicit specific molecular and morphological responses. Exposure to OP increased mRNA levels of thyroid receptors (TRs) alpha and beta, deiodinase type 2 (D2), and corticotropin releasing hormone in the brain and of D2 in the tail of tadpoles. 4-tert-octylphenol also enhanced T3-induced expression of D2 in the brain. The combination of UVBR and OP affected the expression of TR alpha in the brain and the responses of TR alpha and beta genes to T3 in the tail, demonstrating the importance of considering the effects of multiple stressors on amphibians. Tadpoles exposed to UVBR were developmentally delayed and exhibited slowed tail resorption and accelerated hindlimb development following exposure to T3. Together, these findings indicate that UVBR alters the rate of development and TH-dependent morphological changes at metamorphosis, and that exposure to UVBR and/or OP disrupts the expression of genes important for development and the biological action of T3 in peripheral tissues. Our group is the first to demonstrate that environmental levels of UVBR and/or OP can affect the thyroid system of amphibians.

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Chronic Exposure of Rana pipiens Tadpoles to UVB Radiation and the Estrogenic Chemical 4- tert -octylphenol

Cited by 20 publications

References 55 publications

Drivers of amphibian declines: effects of ultraviolet radiation and interactions with other environmental factors

Drivers of amphibian declines: effects of ultraviolet radiation and interactions with other environmental factors

A small increase in UV-B increases the susceptibility of tadpoles to predation

Preexposure to ultraviolet B radiation and 4-tert-octylphenol affects the response of Rana pipiens tadpoles to 3,5,3′-triiodothyronine

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