Evolutionary approach for pollution study: The case of ionizing radiation

Estimating the consequences of environmental changes, specifically in a global change context, is essential for conservation issues. In the case of pollutants, the interest in using an evolutionary approach to investigate their consequences has been emphasized since the 2000s, but these studies remain rare compared to the characterization of direct effects on individual features. We focused on the study case of anthropogenic ionizing radiation because, despite its potential strong impact on evolution, the scarcity of evolutionary approaches to study the biological consequences of this stressor is particularly true. In this study, by investigating some particular features of the biological effects of this stressor, and by reviewing existing studies on evolution under ionizing radiation, we suggest that evolutionary approach may help provide an integrative view on the biological consequences of ionizing radiation. We focused on three topics: (i) the mutagenic properties of ionizing radiation and its disruption of evolutionary processes, (ii) exposures at different time scales, leading to an interaction between past and contemporary evolution, and (iii) the special features of contaminated areas called exclusion zones and how evolution could match field and laboratory observed effects. This approach can contribute to answering several key issues in radioecology: to explain species differences in the sensitivity to ionizing radiation, to improve our estimation of the impacts of ionizing radiation on populations, and to help identify the environmental features impacting organisms (e.g., interaction with other pollution, migration of populations, anthropogenic environmental changes). Evolutionary approach would benefit from being integrated to the ecological risk assessment process.

Prolonged Inhalation Exposure to Coal Dust on Irradiated Rats and Consequences

The purposes of this study were to research immune system changes and liver and lung tissues in irradiated rats after prolonged exposure to coal dust. A study was carried out on 30 male Wistar rats that were divided into 3 groups: group I, intact animals; group II, exposure to coal dust and 0.2 Gy γ-irradiation; and group III, combined exposure to 6 Gy γ-irradiation and coal dust. The combination of a low and sublethal dose of γ-irradiation with coal dust leads to a significant change in immunity at the remote period. Particularly, the increase in radioactivity at the combined effect causes weakening of phagocytosis, and reduction in T lymphocytes by a factor of 2, immunoglobulin imbalance, and cytokine dysfunction develop secondary immune failure. During prolonged inhalation with coal dust of irradiated animals with the dose of 0.2 Gy, fibrosis and perivascular sclerosis of the bronchial wall of the lungs are formed, and perivascular fibrosis is formed in the liver. The increase in exposure dose up to 6 Gy in combination with coal, in the distant period, caused pulmonary hypertension amid hypertrophy of light arterial vessels and fibrous changes in arteriole, and destructive changes and collection necrosis develop in liver parenchyma. In the case of dust radiation synergy, the increase in doses leads to a significant immune deficiency, which occurs according to the “dose effect” principle; increases damage to animal tissues; and leads to liver tissue necrosis, pulmonary fibrosis, and pulmonary hypertension.

Living in a Toxic World

While the proliferation of industrial toxic substances over the past century has had drastic environmental and bodily effects, conventional methods of measuring and mitigating those effects continue to produce uncertainty. The project of living in a toxic world entails ethical, technical, and aesthetic efforts to understand toxicity as a contingent encounter among beings, systems, and things, rather than as a fundamental characteristic of particular substances. Anthropologists do not just observe such encounters; they live and work within them. This review examines recent anthropological research on toxicity, proposing that responses to toxic disaster and occupational exposure, as well as acts of familial, state, or corporate care, are all modes of “toxic worlding.” The review concludes with a summary of recent research in collaborative and engaged anthropology, suggesting that such approaches are essential not so much for purifying or detoxifying the world as for making it otherwise.

Mental distress in the rural Kazakhstani population exposed and non-exposed to radiation from the Semipalatinsk Nuclear Test Site

The present study investigates the rates of depression, anxiety, somatic distress, and fatigue in a rural population of Abayskiy, Borodulikha and Mayskiy districts exposed to radiation from Semipalatinsk Nuclear Test Site in comparison with the unexposed population of Kurchum district. The sample size included 901 people, of whom 656 were residents of radioecological contaminated areas, while 245 resided at ecologically safe territories and had no radiation exposure in the past. Both study groups had no significant differences concerning age, sex, level of education, smoking habit, and alcohol consumption. The prevalence of depression, anxiety, somatic distress and fatigue in the exposed group was found to be considerably higher than that in the unexposed. Results of logistic regression analysis showed considerable differences in associations between depression and anxiety, as wells as between depression and somatic distress in the exposed group. Besides, depression was significantly associated with general fatigue, reduced activity, physical fatigue, reduced motivation and mental fatigue in the unexposed group. There is a need to tailor public health interventions focused on the identification and management of individuals exhibiting mental distress, including the provision of adequate information about radiation-induced health effects, quality routine check-ups and psychological counseling.

Nuclear disaster as chronic crisis: Accounts of radiation embodiment by survivors of the Chernobyl nuclear disaster from Belarus born before, in and after 1986

This article looks at chronic crisis on an empirical example of radiation embodiment by survivors of a nuclear disaster. Developing further the work of Henrik Vigh, this article argues that chronic crisis is conflictual in nature, where some individuals fully embrace it, while others reject it. A total of 16 in-depth interviews were conducted with survivors of the Chernobyl nuclear disaster from Belarus who were below 18 years in 1986 and born in or after 1986. It is shown that survivors do not consider themselves affected, when they argue against social stigma imposed by others and when development discourse in relation to post-communist health care is used as a background against which nuclear victimhood can be argued. It is also demonstrated that survivors do consider themselves affected, when they embrace disaster temporality and victimhood and argue against narrow scientific definitions of victimhood which downplay a variety of health conditions attributed to the disaster. This article concludes that chronic crisis may not always be transformative, but reproduce the existing inequalities. It contributes to the anthropology of disaster and the anthropology of suffering by bringing together scholarship in feminist theory of disability and critical perspectives on development.