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Environmental Stress, Adaptation and Evolution

2013-03-08 Science
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Release : 2013-03-08
Genre : Science
Kind : eBook
Book Rating : 821/5 ( reviews)

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Book Synopsis Environmental Stress, Adaptation and Evolution by : K. Bijlsma

Download or read book Environmental Stress, Adaptation and Evolution written by K. Bijlsma. This book was released on 2013-03-08. Available in PDF, EPUB and Kindle. Book excerpt: Most organisms and populations have to cope with hostile environments, threatening their existence. Their ability to respond phenotypically and genetically to these challenges and to evolve adaptive mechanisms is, therefore, crucial. The contributions to this book aim at understanding, from a evolutionary perspective, the impact of stress on biological systems. Scientists, applying different approaches spanning from the molecular and the protein level to individuals, populations and ecosystems, explore how organisms adapt to extreme environments, how stress changes genetic structure and affects life histories, how organisms cope with thermal stress through acclimation, and how environmental and genetic stress induce fluctuating asymmetry, shape selection pressure and cause extinction of populations. Finally, it discusses the role of stress in evolutionary change, from stress induced mutations and selection to speciation and evolution at the geological time scale. The book contains reviews and novel scientific results on the subject. It will be of interest to both researchers and graduate students and may serve as a text for graduate courses.

Stress Ecology

2012-02-02 Science
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Release : 2012-02-02
Genre : Science
Kind : eBook
Book Rating : 726/5 ( reviews)

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Book Synopsis Stress Ecology by : Christian E.W. Steinberg

Download or read book Stress Ecology written by Christian E.W. Steinberg. This book was released on 2012-02-02. Available in PDF, EPUB and Kindle. Book excerpt: Not all stress is stressful; instead, it appears that stress in the environment, below the mutation threshold, is essential for many subtle manifestations of population structures and biodiversity, and has played a substantial role in the evolution of life. Intrigued by the behavior of laboratory animals that contradicted our current understanding of stress, the author and his group studied the beneficial effects of stress on animals and plants. The seemingly “crazy” animals demonstrated that several stress paradigms are outdated and have to be reconsidered. The book describes the general stress responses in microorganisms, plants, and animals to abiotic and biotic, to natural and anthropogenic stressors. These stress responses include the activation of oxygen, the biotransformation system, the stress proteins, and the metal-binding proteins. The potential of stress response lies in the transcription of genes, whereas the actual response is manifested by proteins and metabolites. Yet, not all stress responses are in the genes: micro-RNAs and epigenetics play central roles. Multiple stressors, such as environmental realism, do not always act additively; they may even diminish one another. Furthermore, one stressor often prepares the subject for the next one to come and may produce extended lifespans and increased offspring numbers, thus causing shifts in population structures. This book provides the first comprehensive analysis of the ecological and evolutionary effects of stress.

Morphogenesis, Environmental Stress and Reverse Evolution

2020-07-23 Science
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Release : 2020-07-23
Genre : Science
Kind : eBook
Book Rating : 795/5 ( reviews)

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Book Synopsis Morphogenesis, Environmental Stress and Reverse Evolution by : Jean Guex

Download or read book Morphogenesis, Environmental Stress and Reverse Evolution written by Jean Guex. This book was released on 2020-07-23. Available in PDF, EPUB and Kindle. Book excerpt: It is widely acknowledged that life has adapted to its environment, but the precise mechanism remains unknown since Natural Selection, Descent with Modification and Survival of the Fittest are metaphors that cannot be scientifically tested. In this unique text, invertebrate and vertebrate biologists illuminate the effects of physiologic stress on epigenetic responses in the process of evolutionary adaptation from unicellular organisms to invertebrates and vertebrates, respectively. This book offers a novel perspective on the mechanisms underlying evolution. Capacities for morphologic alterations and epigenetic adaptations subject to environmental stresses are demonstrated in both unicellular and multicellular organisms. Furthermore, the underlying cellular-molecular mechanisms that mediate stress for adaptation will be elucidated wherever possible. These include examples of ‘reverse evolution’ by Professor Guex for Ammonites and for mammals by Professor Torday and Dr. Miller. This provides empiric evidence that the conventional way of thinking about evolution as unidirectional is incorrect, leaving open the possibility that it is determined by cell-cell interactions, not sexual selection and reproductive strategy. Rather, the process of evolution can be productively traced through the conservation of an identifiable set of First Principles of Physiology that began with the unicellular form and have been consistently maintained, as reflected by the return to the unicellular state over the course of the life cycle.

Environmental Stressors and Gene Responses

2000-07-31 Science
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Release : 2000-07-31
Genre : Science
Kind : eBook
Book Rating : 121/5 ( reviews)

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Book Synopsis Environmental Stressors and Gene Responses by : J.M. Storey

Download or read book Environmental Stressors and Gene Responses written by J.M. Storey. This book was released on 2000-07-31. Available in PDF, EPUB and Kindle. Book excerpt: Cell and Molecular Responses to Stress is a new multi-volume book series from Elsevier Science that focuses on how organisms respond at a molecular level to environmental stresses imposed upon them. All organisms deal with variations in multiple environmental factors including temperature, oxygen, salinity, and water availability. Many show amazing tolerances to extreme stress with remarkable biochemical adaptations that allow life to persist under very difficult circumstances. This series explores the molecular mechanisms by which cells and organisms respond to stress, focusing on the variations in metabolic response that allow some cells and organisms to deal with extreme stress, others to endure stress within strict limits, and others to have a very low tolerance for changes in environmental parameters.Articles from within the series highlight the elastic limits of molecular responses in Nature, with examples drawn from animal, plant and bacteria systems.Volume 1, begins by considering some of the roles of environmental stress in determining the geographic distribution of animals and in promoting species divergence and then explores gene expression and metabolic responses to environmental stress with examples of adaptation to high and low temperature, osmotic, anoxia/ischemia, desiccation, high pressure and heavy metal stresses.

Environmental Stress

1984-05-25 Medical
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Release : 1984-05-25
Genre : Medical
Kind : eBook
Book Rating : 594/5 ( reviews)

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Book Synopsis Environmental Stress by : Gary W. Evans

Download or read book Environmental Stress written by Gary W. Evans. This book was released on 1984-05-25. Available in PDF, EPUB and Kindle. Book excerpt: A systematic 1982 on human reactions to five environmental stress factors.

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