Download or read book Effects of Temperature on Ectothermic Organisms written by Wolfgang Wieser and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 295 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of thermoregulation in endotherms has contributed much to the emergence of the concept of control theory in biology. By the same token, the study of tempera ture adjustment in ectotherms is likely to have a far-reaching influence on ideas on the regulation of metabolism in general. The reason for this is that ectotherms, in adapting to the vagaries of a thermally unstable environment, deploy a range of subtle molecular and organismic strategies. Thus the experimenter, using temperature changes as a tool, is well equipped to analyze some of these strategies. This approach has enabled some important mechanisms of temperature-induced adaptation to be elucidated; the most striking of these are the effects on metabolism of changes in the conformation of enzymes and the transfer properties of membranes. Furthermore, there is a vague but persistent feeling among those working in this field that changes in the nervous system will ultimately prove to be the agency by which many of the molecular mechanisms of temperature adaptation are controlled. Should this indeed be the case, a new phase would soon begin in our understanding of the interactions between the systemic and the cellular levels of organization. However, it is not only questions about the causes of temperature adaptation that can provide answers of potential importance to the general biologist; of equal significance are questions as to the meaning of temperature adaptation in a particular organism.

Download or read book Effects of Temperature on Ectothermic Organisms written by Wolfgang Wieser and published by . This book was released on 1973 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book EFFECTS OF TEMPERATURE ON ECTOTHERMIC ORGANISMS ECOLOGICAL IMPLICATIONS AND MECHANISMS OF COMPENSATIONS WITH 126 FIG written by Wolfgang Wieser and published by . This book was released on 1973 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Temperature on Ectothermic Organisms written by Wolfgang Wieser and published by . This book was released on 1973 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Temperature Biology of Animals written by Andrew Cossins and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt: Temperature is one facet in the mosaic of physical and biotic factors that describes the niche of an animal. Ofthe physical factors it is ecologically the most important. for it is a factor that is all-pervasive and one that. in most environments. lacks spatial or temporal constancy. Evolution has produced a wide variety of adaptive strategies and tactics to exploit or deal with this variable environmental factor. The ease with which temperature can be measured. and controlled experimentally. together with its widespread influence on the affairs of animals. has understandably led to a large. dispersed literature. In spite of this no recent book provides a comprehensive treatment of the biology of animals in relation to temperature. Our intention in writing this book was to fill that gap. We hope we have provided a modern statement with a critical synthesis of this diverse field. which will be suitable and stimulating for both advanced undergraduate and post graduate students of biology. This book is emphatically not intended as a monographical review. as thermal biology is such a diverse. developed discipline that it could not be encompassed within the confines of a book of this size.

Download or read book Insect Thermoregulation written by Bernd Heinrich and published by John Wiley & Sons. This book was released on 1981-01-19 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: Physiology and body temperatures of insects.

Download or read book Thermal Adaptation written by Michael J. Angilletta Jr. and published by Oxford University Press. This book was released on 2009-01-29 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Temperature profoundly impacts both the phenotypes and distributions of organisms. These thermal effects exert strong selective pressures on behaviour, physiology and life history when environmental temperatures vary over space and time. Despite temperature's significance, progress toward a quantitative theory of thermal adaptation has lagged behind empirical descriptions of patterns and processes. In this book, the author draws on theory from the more general discipline of evolutionary ecology to establish a framework for interpreting empirical studies of thermal biology. This novel synthesis of theoretical and empirical work generates new insights about the process of thermal adaptation and points the way towards a more general theory. The threat of rapid climatic change on a global scale provides a stark reminder of the challenges that remain for thermal biologists and adds a sense of urgency to this book's mission. Thermal Adaptation will benefit anyone who seeks to understand the relationship between environmental variation and phenotypic evolution. The book focuses on quantitative evolutionary models at the individual, population and community levels, and successfully integrates this theory with modern empirical approaches. By providing a synthetic overview of evolutionary thermal biology, this accessible text will appeal to both graduate students and established researchers in the fields of comparative, ecological, and evolutionary physiology. It will also interest the broader audience of professional ecologists and evolutionary biologists who require a comprehensive review of this topic, as well as those researchers working on the applied problems of regional and global climate change.

Download or read book Ecophysiological Analysis of Vulnerability to Climate Warming in Ectotherms written by Lin Zhang and published by Frontiers Media SA. This book was released on 2023-07-25 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: Temperature plays a critical role in animal survival and climate warming is one of the greatest threats to global biodiversity in the future. It is already affecting species and communities with severe impacts and it is predicted that climate warming will cause species extinctions and distributional shifts in the coming decades. The impact of climate warming is expected to be particularly severe on ectothermic animals, including fishes, amphibians, and reptiles. Thus, assessing species’ responses to ongoing climate warming and determining what conservation actions should be taken are among the most significant and controversial challenges for ecologists. Identifying the most vulnerable species to extinction as a result of climate warming is an appropriate first step in mitigating the impacts of a changing world. An organism’s vulnerability to climate warming depends on its sensitivity to environmental changes, its exposure to the change, and its ability to recover from and potential to adapt to change. The interaction of these factors makes predicting the effects of climate warming on species a complex and major challenge for ecologists. Developing a deeper knowledge of ectotherms’ vulnerability to climate warming is crucial to enhance our understanding of extinction processes and significantly contribute to conservation efforts by guiding the implementation of better policies and management strategies to prevent the extinction of remaining populations. Investigations of climate warming vulnerability are likely to benefit from measurements of environmental conditions taken at the scale at which organisms experience them. Therefore, the main objective of this interdisciplinary Research Topic is to bring together research on how ectotherms respond to climate warming at various levels. We will particularly focus on the life-history, energy strategy, physiological response, etc. We encourage inter-and multidisciplinary research approaches linking molecular biology, thermal physiology (and ecology), behavioral ecology, functional ecology, evolutionary genetics, and bioenergetics.

Download or read book Advances in Comparative and Environmental Physiology written by Lawrence C.H. Wang and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt: When survival is challenged by the cold, animals react by employing both behavioral and physiological solutions. Depending on the magni tude of the cold stress and the nature of the adjustment, simple avoidance or sophisticated capacity or resistance compensations may be used. Thus, migration, shelter seeking, metabolic and insulative compen sation, torpor, and freezing avoidance and tolerance are successful tac tics used by diverse groups of animals. To understand and appreciate the benefits of these tactics, it is necessary to examine not only the well being of the whole animal but also their basic underlying mechanisms. In ad dition, it is also of fundamental importance to grasp how seasonal cold affects the survivorship and reproductive success of populations when confronted by a general reduction in primary productivity and an elevated energy cost for maintenance (e. g. in endotherms). In this regard, a synthetic overview which integrates aspects of cell biology, biochem istry, physiology, neurobiology, behavior, and population biology should be a fruitful approach in providing a holistic understanding on how animals adapt to cold. The present volume is an attempt to achieve such an overview; its objective is to provide a depth and breadth of coverage that is essential to a full appreciation of animal adaptation to cold. It is the hope of the contributing authors that this book will serve as an effective reference text for all senior undergraduate and graduate students as well as research scientists with an interest in cold physiology.

Download or read book Insect Physiological Ecology written by Steven L. Chown and published by OUP Oxford. This book was released on 2004-07-15 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a modern, synthetic overview of interactions between insects and their environments from a physiological perspective that integrates information across a range of approaches and scales. It shows that evolved physiological responses at the individual level are translated into coherent physiological and ecological patterns at larger, even global scales. This is done by examining in detail the ways in which insects obtain resources from the environment, process these resources in various ways, and turn the results into energy which allows them to regulate their internal environment as well as cope with environmental extremes of temperature and water availability. The book demonstrates that physiological responses are not only characterized by substantial temporal variation, but also shows coherent variation across several spatial scales. At the largest, global scale, there appears to be substantial variation associated with the hemisphere in which insects are found. Such variation has profound implications for patterns of biodiversity as well as responses to climate change, and these implications are explicitly discussed. The book provides a novel integration of the understanding gained from broad-scale field studies of many species and the more narrowly focused laboratory investigations of model organisms. In so doing it reflects the growing realization that an integration of mechanistic and large-scale comparative physiology can result in unexpected insights into the diversity of insects.

Download or read book Phenotypic Evolution written by Carl Schlichting and published by Sinauer Associates Incorporated. This book was released on 1998-01-01 with total page 387 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phenotypic expression has variously been attributed to developmental, genetic and environmental factors. This book presents a cohesive view of how adaptive phenotypes evolve, recognizing organisms as complex genetic-epigenetic systems that develop in response to changing environments.

Download or read book Thermobiology written by Anthony H. Rose and published by . This book was released on 1967 with total page 682 pages. Available in PDF, EPUB and Kindle. Book excerpt: Effects of temperature on the state of water in the living cell; Heat effects on proteins and enzymes; Effects of elevated temperatures on DNA and on some polynucleotides: denaturation, renaturation and cleavage of glycosidic and phosphate ester bonds; The effect of heat on membranes and membrane constituents; Temperature effects on micro-organisms; The effect of temperature on the relation between animal viruses and their hosts; Heat responses of higher plants; Insects and temperature; The heat responses of invertebrates (exclusive of insects); Responses of vertebrate poikilotherms to temperature; Resistance to cold in mammals; Resistance to heat in man and other homeothermic animals; Medical applications of thermobiology; Thermal energy as a factor in the biology of soils; Thermal energy as a factor in the biology of the polar regions.

Download or read book Ectothermic Animals written by Bree Mia and published by Independently Published. This book was released on 2024-02-20 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A creature known as a "cold-blooded animal" or an ectotherm (derived from the Greek meaning "outside" is one in which the internal physiological sources of heat are either minimal or of very little significance when it comes to regulating body temperature. These creatures, like frogs, depend on external heat sources to function at extremely economical metabolic rates. Homeothermic ectotherms are those that inhabit settings with nearly constant temperatures, such as those found in parts of the deep ocean. Conversely, in regions where temperature fluctuations are significant enough to restrict the physiological functions of other ectotherms, numerous species have developed a habit of searching for outside heat sources or refuge from it. For instance, numerous reptiles use a variety of behavioral thermoregulation strategies to maintain their body temperature, including tanning in the sun and seeking cover when needed. Some ectotherms can effectively regulate their body temperature through a variety of behavioral patterns. In order to maximize their exposure to the sun, reptiles and many other insects look for sunny spots to warm up. When the temperature is too high, they seek out cooler water or shade. Honey bees bundle themselves to stay warm throughout the winter. In order to accumulate heat before taking flight, moths and butterflies may arrange their wings to receive the most amount of sunlight possible.In Large group basking is beneficial for thermoregulation in gregarious caterpillars, like the fall webworm and the forest tent caterpillar. Many flying insects, like bumblebees and honey bees, vibrate their flight muscles without violently moving their wings in order to elevate their internal temperatures endothermally before taking flight. The challenge of consistently applying concepts like poikilothermy and homeothermy is demonstrated by such endothermal activity. Ectotherms are helped to regulate their body temperature by both physiological and behavioral adjustments. Reusing and thereby preserving part of the heat that would have otherwise been wasted, diving reptiles use heat exchange processes, in which cold blood from the skin absorbs heat from blood traveling outward from the body core. In order to allow for more evaporative cooling, bullfrogs' skin secretes more mucus in the heat. Entering a state of torpor causes some ectotherms to slow down or cease their metabolism completely, as in the case of the wood frog. Depending upon the species and conditions, the torpor may endure for a single night, a season, or even several years.

Download or read book The Evolution of Endothermy From Patterns to Mechanisms written by Elias T. Polymeropoulos and published by Frontiers Media SA. This book was released on 2018-09-14 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metabolic rate is a key ecophysiological factor determining fitness, distribution, survival and reproductive strategies of organisms. The ability to endogenously produce heat and elevate body temperature beyond ambient, has far reaching ecological implications. The diversity of thermogenic mechanisms and strategies employed throughout the animal kingdom is truly phenomenal and one of the greatest biological mysteries. Interestingly, even heat producing plants have been characterised. Over the last several decades, the oversimplified distinction between warm- and cold blooded animals has well and truly been put to rest and the terms “endo- and ectotherm” have been established. Birds and mammals are regarded as endotherms, capable of maintaining high body temperatures within highly precise boundaries. On contrary, in ectothermic organisms ambient temperature governs body temperature and metabolism, encompassing the majority of present day species. However, it has recently become very clear that this distinction is still not accurate enough to describe the vastness of heat generating mechanisms within endo- but also ectotherms. Indeed, a plethora of ectothermic animals display endogenous as well as behavioural means of temperature control and mechanisms for heat generation. There is large diversity in regards to thermoregulatory ability and strategy within endotherms as well, with some groups being classified by separate categories such as basoendotherms and mesotherms. Considerable interest and efforts has been put into the quest to understand the underlying physiological mechanisms leading and facilitating high metabolic rates and body temperatures of endotherms. These mechanisms are far from being exhaustively studied and the evolutionary trajectory leading to high metabolic rates and stable body temperatures is equally, vividly debated. This discussion includes an array of questions and theories surrounding the presence of endothermy in extinct dinosaurs. In addition, a lively debate surrounds the evolutionary drivers promoting the establishment of endothermy with clear support of direct or indirect selective benefits. Within this Research Topic we plan to compile the latest ideas, knowledge and experimental work to elucidate the patterns of the evolution of endothermy and its transition/distinction from ectothermy. The focus is on key physiological mechanisms supporting this transition and contributing to the maintenance of high metabolic rates and body temperature in endotherms, as well as mechanisms for local heterothermy and heat dissipation in ectotherms. These mechanisms and conclusions may be derived from different levels of organisation such as population, taxon, species as well as tissue, cellular or molecular levels. It may also encompass novel experimental or theoretical models testing evolutionary theories of endothermy. A comparative approach is encouraged but not fundamental.

Download or read book Metacommunities written by Marcel Holyoak and published by University of Chicago Press. This book was released on 2005-10 with total page 527 pages. Available in PDF, EPUB and Kindle. Book excerpt: Takes the hallmarks of metapopulation theory to the next level by considering a group of communities, each of which may contain numerous populations, connected by species interactions within communities and the movement of individuals between communities. This book seeks to understand how communities work in fragmented landscapes.

Download or read book Foraging Theory written by David W. Stephens and published by Princeton University Press. This book was released on 2019-12-31 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This account of the current state of foraging theory is also a valuable description of the use of optimality theory in behavioral ecology in general. Organizing and introducing the main research themes in economic analyses of animal feeding behavior, the authors analyze the empirical evidence bearing on foraging models and answer criticisms of optimality modeling. They explain the rationale for applying optimality models to the strategies and mechanics of foraging and present the basic "average-rate maximizing" models and their extensions. The work discusses new directions in foraging research: incorporating incomplete information and risk-sensitive behavior in foraging models; analyzing trade-offs, such as nutrient requirements and the threat of being eaten while foraging; formulating dynamic models; and building constrained optimization models that assume that foragers can use only simple "rules of thumb." As an analysis of these and earlier research developments and as a contribution to debates about the role of theory in evolutionary biology. Foraging Theory will appeal to a wide range of readers, from students to research professionals, in behavioral ecology, population and community ecology, animal behavior, and animal psychology, and especially to those planning empirical tests of foraging models.

Download or read book Amniote Origins written by Stuart Sumida and published by Elsevier. This book was released on 1997-01-08 with total page 521 pages. Available in PDF, EPUB and Kindle. Book excerpt: Amniote Origins integrates modern systematic methods with studies of functional and physiological processes, and illustrates how studies of paleobiology can be illuminated by studies of neonatology. For this reason, comparative anatomists and physiologists, functional morphologists, zoologists, and paleontologists will all find this unique volume very useful. Inspired by the prospect of integrating fields that have long been isolated from one another, Amniote Origins provides a thorough and interdisciplinary synthesis of one of the classic transitions of evolutionary history. - Integrates modern systematic methods with studies of functional and physiological processes - Illustrates how studies of paleobiology can be illuminated by studies of neonatology - Provides a thorough and interdisciplinary synthesis of one of the classic transitions of evolutionary history