Genotoxicity in American kestrels in an agricultural landscape in the Baja California peninsula, Mexico

Frixione, Martín G.; Rodríguez‐Estrella, Ricardo

doi:10.1007/s11356-020-10392-0

Cited by 13 publications

(8 citation statements)

References 55 publications

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“…These abnormalities may complement the scoring of micronuclei (Güner & Muranli, 2011). It has been reported that nuclear abnormalities, as a defense response to prevent major detrimental effects, such as double chain breakage and generation of additional damage to the organism, are generated before micronuclei formation (Frixione & Rodríguez-Estrella, 2020). Our results would be in accordance with this idea because statistical differences in the frequencies of nuclear aberrations in the forests with the lower levels of disturbance were found (Seminatural).…”

Section: Discussionsupporting

confidence: 87%

“…However, differences in the frequency of micronuclei were only detected in the more disturbed shrub-dominated forests. It has been observed that nuclear abnormalities are more frequent in individuals captured in areas in which the native vegetation cover has been reduced due to changes in land use for agriculture (Frixione & Rodríguez-Estrella, 2020;Souto et al, 2018).…”

Section: Discussionmentioning

confidence: 99%

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Chronic Degradation of Seasonally Dry Tropical Forests Increases the Incidence of Genotoxicity in Birds

Solórzano

Ordóñez-Delgado

Espinosa

et al. 2023

Preprint

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Environmental stress as a consequence of anthropic pressures can affect the physiological condition of animals and cause damage to their DNA. Multiple studies have shown genotoxic effects of different pollutants; however, to our knowledge, the impact of environmental stress on genetic damage has been scarce explored. In some stressful ecosystems, such as seasonally dry tropical forests, the combined effects of anthropogenic activities and ongoing global changes cause increased environmental stresses that could trigger physiological and genetic effects on biodiversity. In this study, we evaluated the changes in the prevalence of genotoxic damage to birds in three states of forest degradation in the Tumbesian Region of Western Ecuador. We used the blood samples of 52 bird species to determine the frequency of micronucleus and nuclear abnormalities in the erythrocytes. Our results showed a significant effect of forest degradation in the proportion of micronucleus and nuclear abnormalities at the community level, localities with higher degradation showed higher levels of abnormalities. However, when analyzing the dominant species, we found contrasting responses. While Amazilis amazilia and Lepidocolaptes souleyetii showed a reduction in the proportion of nuclear abnormalities from the natural to shrub-dominated localities, Troglodytes aedon and Polioptila plumbea showed an increase. We concluded that the degradation process of these tropical forests increases the stress on the bird community generating genotoxic damage to the bird community. Bird responses seem species-specific, which could explain the differences in changes in bird composition reported in other studies.

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Section: Discussionsupporting

confidence: 87%

Section: Discussionmentioning

confidence: 99%

Chronic Degradation of Seasonally Dry Tropical Forests Increases the Incidence of Genotoxicity in Birds

Solórzano

Ordóñez-Delgado

Espinosa

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…Our results related to the negative role of development at any intensity suggests that increasing development in and around agricultural areas may pose more of a threat to kestrel reproduction in these regions than the croplands themselves. However, there is a need to comprehensively assess agrochemical exposure levels and their potential consequences in kestrels (Frixione and Rodríguez-Estrella 2020) to determine other potential impacts of the use of croplands.…”

Section: Discussionmentioning

confidence: 99%

Factors Associated with American Kestrel (Falco sparverius) Nest Box Occupancy and Reproductive Success in an Agricultural Landscape

Kolowski

Morrow

2022

Journal of Raptor Research

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The American Kestrel (Falco sparverius), a small, cavity-nesting falcon that breeds across most of North America, is experiencing an apparent population decline across much of the United States that has yet to be sufficiently explained. With landscape change as a potential factor, the association of landscape composition with kestrel reproduction may assist not only in managing declines but also in improving the effectiveness and efficiency of nest box programs, which can bolster local populations and support monitoring and research efforts. We monitored 163 unique American Kestrel nest boxes over a 12-yr study period (2008–2019) in western Virginia to investigate the factors influencing kestrel reproductive success and we documented relatively high rates of both box occupancy (80%) and nest success (78.9%). In a study area dominated by both high- and low-intensity agriculture, we focused on identifying patterns in land cover composition that may limit reproductive success and associated each box with land cover composition metrics at four spatial scales. Generalized linear mixed models indicated nest boxes with a lower proportion of developed land within 500 m, and a higher proportion of crops and pasture/hay within 3 km were more likely to be occupied by kestrels. Although probability of kestrel nest success increased with reduced proportions of developed land within 100 m, the primary factors influencing success were clutch initiation date and the presence of European starlings (Sturnus vulgaris), with earlier nesting and the absence of starling activity resulting in higher nest success. Overall, cover-type associations with nest success and box occupancy were not strong and establishment of nest boxes in targeted kestrel habitat, while likely maximizing reproductive output, limits research opportunities to identify critical land cover thresholds for the species.

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“…Some authors have made efforts to evaluate the potential of birds as bioindicators by capturing a great number of species, but they rarely succeeded in identifying a good bioindicator species for genotoxic damage (Baesse et al 2015) or in determining a species more sensitive to metal contamination (Abbasi et al 2015a; Grúz et al 2018). Other authors have restricted their attention to only one or a few species (Tsarpali et al 2020;Mukhtar et al 2020) and were able to achieve more robust conclusions, which is mainly attributed to known biological characteristics of the target species (Frixione and Rodríguez-Estrella 2020).…”

Section: Introductionmentioning

confidence: 99%

Potential Use of Distinct Biomarkers (Trace Metals, Micronuclei and Nuclear Abnormalities) in a Heterogeneous Sample of Birds in Southern Brazil.

Tomazelli

Rodrigues

Franco

et al. 2021

Preprint

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The analysis of metal concentrations in feathers and the micronuclei (MN) and other nuclear abnormalities (NA) test in birds are tools used for evaluating the impacts that anthropogenic actions have been causing to the environment and organisms. Here we used these biomarkers to investigate the response of birds to disturbances observed in three areas with different environmental characteristics (natural, agricultural and urban) in southern Brazil. We obtained a diverse sample (108 individuals from 25 species and 17 families) without significant differences in metal concentrations, frequency of MN and AN between sampling points. The concentrations of zinc (Zn) and copper (Cu) were significantly different between trophic guilds (Zn: p = 0.0006, Cu: p = 0.04) and age classes (Zn: p = 0.01, Cu: p = 0.03). Omnivore birds contributed to the increase in the number of MN (∆AICc: 0.00; w = 0.40) and NA, which was also influenced by age classes and body condition index (BCI) (∆AICc: 0.00; w = 0.34; ∆AICc: 0.89; w = 0.22; ∆AICc: 1.15; w = 0.19; ∆AICc: 1.33; w = 0.18). We showed that in a diverse sample of birds, the variables analyzed affected each biomarker in distinct ways.

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Genotoxicity in American kestrels in an agricultural landscape in the Baja California peninsula, Mexico

Cited by 13 publications

References 55 publications

Chronic Degradation of Seasonally Dry Tropical Forests Increases the Incidence of Genotoxicity in Birds

Chronic Degradation of Seasonally Dry Tropical Forests Increases the Incidence of Genotoxicity in Birds

Factors Associated with American Kestrel (Falco sparverius) Nest Box Occupancy and Reproductive Success in an Agricultural Landscape

Potential Use of Distinct Biomarkers (Trace Metals, Micronuclei and Nuclear Abnormalities) in a Heterogeneous Sample of Birds in Southern Brazil.

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