Download or read book Ecological and Physiological Effects of Environmental Stressors Across Life stages in Amphibians written by Kacey Lynn Dananay and published by . This book was released on 2018 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding the effects of environmental stressors includes identifying how stressors affect individual physiology and ecological communities. Considering carry-over effects, effects from one life-stage persisting into later life-stages, can further reduce the chances of under- or over-estimating the effects of environmental stressors. I investigated the effects of two environmental stressors on amphibian physiology across life-stages including direct and indirect effects. I first investigated road salt. Road salt, a de-icing agent used on highways, can spread up to 1km in wetlands during snowmelt. It may be particularly important for early breeding amphibians like wood frogs (Rana sylvatica). Road salt significantly increased larval frog growth and algal biomass which was likely due to an indirect effect of salt decreasing zooplankton abundance, an algal competitor of frogs. A second experiment found despite increased larval growth, exposure to road salt caused juvenile frogs to have higher mortality in low-density terrestrial environments. The second stressor I investigated was Artificial Light At Night (ALAN). ALAN reduced metamorphic duration of American toads (Anaxyrus americanus) and periphyton biomass but did not affect the colonization of toad predators. These results suggested the effects of ALAN are mediated through direct rather than indirect effects. Extending this experiment found juvenile growth was reduced by juvenile-stage exposure to ALAN. Increased juvenile activity, specifically the lack of suppressed nocturnal activity, likely reduced juvenile growth of individuals housed with ALAN. Furthermore, carry-over effects were also present; larval-stage ALAN marginally increased juvenile activity. In the final experiment, I added an additional stressor: predation. Predators reduced toad survival and mass, regardless of ALAN. This suggests ALAN did not increase predator consumption of toads. Neither predators nor ALAN affected corticosterone production in the tadpole or metamorph life-stages but larval-stage ALAN increased corticosterone production in juvenile toads. These experiments demonstrated environmental stressors can have direct and indirect effects. Furthermore, larval stage stressors can carry-over and affect later life-stages even if that stressor is no longer present. Future environmental stressor studies should investigate direct and indirect effects together and extend experiments beyond a single life-stage. As demonstrated here, failure to do so may under-estimated the effects of these environmental stressors.
Download or read book Environmental Physiology of the Amphibians written by Martin E. Feder and published by University of Chicago Press. This book was released on 1992-10-15 with total page 660 pages. Available in PDF, EPUB and Kindle. Book excerpt: Through its emphasis on recent research, its many summary tables, and its bibliography of more than 4,000 entries, this first modern, synthetic treatment of comparative amphibian environmental physiology emerges as the definitive reference for the field. Forty internationally respected experts review the primary data, examine current research trends, and identify productive avenues for future research.
Download or read book Amphibian and Reptile Adaptations to the Environment written by Denis Vieira de Andrade and published by CRC Press. This book was released on 2017-12-19 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: Despite their diversity, amphibians and reptiles share many physiological traits, such as their dependence on external heat sources for body temperature regulation, that are of pivotal importance to their ability to cope with the environment. Considerable variation in physiological capabilities exists in these groups and often can be related to seasonal and geographic differences in environmental parameters. This book provides a comprehensive and integrative view of the interplay between physiology and behavior in amphibians and reptiles, leading to a better understanding of the subject. The book covers topics that have recently been in the spotlight for scientific research on the physiology, behavior, and conservation of amphibians and reptiles. It brings together recent information from a range of disciplines that address critical topics for understanding their biology. As these studies are scattered across articles in specialized journals, this book provides a single and expanded source summarizing such advancements. Amphibian and Reptile Adaptations to the Environment: Interplay Between Physiology and Behavior maintains a solid scientific basis for the biological topics covered. However, it presents the material in a clear and direct manner so that it is accessible even to non-biologists interested in the basic biology, behavior, and ecology of these animals as well as how these elements are connected to their conservation.
Download or read book Ecological and Environmental Physiology of Amphibians written by Stanley S. Hillman and published by OUP Oxford. This book was released on 2008-10-30 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a synthesis of current research on the unique physiological characteristics of amphibians with a particular emphasis on water balance. It includes a wealth of information on ecology, phylogeny and development. The latest experimental techniques and future research directions are also considered.
Download or read book Effects of Environmental Stressors on Amphibian Disease Dynamics and Microbiome Assemblages Across Diverse Species and Habitats written by Wesley James Neely and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Anthropogenically-driven environmental changes like climate warming, habitat loss, and habitat fragmentation are the largest threat to wildlife worldwide. In addition, rising cases of emerging infectious diseases pose severe threats to wildlife and often occur in synergy with anthropogenic disturbances, resulting in population instability and decline. The relationship between habitat loss and disease is complex but can be mediated by reduced immune function associated with a shift in the symbiotic microbial community. This microbial community (the microbiome) is a vital part of the immune system, functioning in conjunction with the innate immune system to protect hosts from pathogen colonization and growth. One especially lethal fungal pathogen, Batrachochytrium dendrobatidis (Bd), is the causative agent of amphibian chytridiomycosis and is responsible for widespread historical and contemporary amphibian declines. Bd infection status and intensity can be influenced by overall microbiome diversity, community structure, and activity of key functional taxa. In this dissertation, I parse out key impacts of environmental disturbance on fungal infection, microbial community interactions, immune responses, and coinfection dynamics in diverse anuran systems. I conducted a diverse set of projects, both observational and experimental, to address this question from four different angles: 1) environmental warming and disease in amphibians of diverse life histories, 2) habitat disturbance and microbial composition in temperate amphibian communities, 3) host movement and habitat fragmentation on microbial function and stress response in tropical frogs, and 4) habitat fragmentation and helminth infection on multisystem microbial diversity and disease in tropical frogs. The data I gathered through this dissertation extend our understanding of amphibian microbiology and disease ecology in human altered landscapes. As mudanças ambientais antropogênicas, como o aquecimento global, a perda e a fragmentação do habitat, são a maior ameaça à vida selvagem em todo o mundo. Além disso, casos crescentes de doenças infecciosas emergentes representam ameaças graves à biodiversidade e geralmente são agravadas por ocorrerem em sinergia com distúrbios antropogênicos, resultando em instabilidade e declínio populacional. A relação entre perda de habitat e doença é complexa, mas pode ser mediada pela redução da função imunológica associada a uma mudança na comunidade microbiana simbiótica. Essa comunidade microbiana (o microbioma) é uma parte vital do sistema imunológico, funcionando em conjunto com o sistema imunológico inato para proteger os hospedeiros da colonização e crescimento de patógenos. Um patógeno fúngico especialmente letal, Batrachochytrium dendrobatidis (Bd), é o agente causador da quitridiomicose de anfíbios e é responsável por amplos declínios históricos e contemporâneos de anfíbios. O status e a intensidade da infecção por Bd podem ser influenciados pela diversidade geral do microbioma, estrutura da comunidade e atividade dos principais táxons funcionais. Nesta dissertação, analiso os principais impactos da perturbação ambiental na infecção fúngica, interações da comunidade microbiana, respostas imunes e dinâmica de coinfecção em diversos comunidades de anuros. Conduzi um conjunto diversificado de projetos, tanto observacionais quanto experimentais, para abordar esta questão de quatro ângulos diferentes: 1) aquecimento global e doenças em anfíbios de diversas histórias de vida, 2) perturbação do habitat e composição microbiana em comunidades de anfíbios de ambientes temperados, 3) hospedeiros, movimento e fragmentação do habitat na função microbiana e resposta ao estresse em rãs tropicais, e 4) fragmentação do habitat e infecção por helmintos na diversidade microbiana multissistêmica e doença em rãs tropicais. Os dados que reuni através desta dissertação ampliam nossa compreensão da microbiologia de anfíbios e ecologia de doenças em paisagens alteradas pelo homem.
Download or read book Ecotoxicology of Amphibians and Reptiles written by Donald W. Sparling and published by CRC Press. This book was released on 2010-06-02 with total page 946 pages. Available in PDF, EPUB and Kindle. Book excerpt: Building on the success of its popular predecessor, the second edition of Ecotoxicology of Amphibians and Reptiles presents newly available findings on the species that are important environmental indicators. This new edition covers nearly twice as many topics as the first, including recent developments in the ecotoxicology of amphibians and reptil
Download or read book The Ecology and Behavior of Amphibians written by Kentwood D. Wells and published by University of Chicago Press. This book was released on 2010-02-15 with total page 1162 pages. Available in PDF, EPUB and Kindle. Book excerpt: Consisting of more than six thousand species, amphibians are more diverse than mammals and are found on every continent save Antarctica. Despite the abundance and diversity of these animals, many aspects of the biology of amphibians remain unstudied or misunderstood. The Ecology and Behavior of Amphibians aims to fill this gap in the literature on this remarkable taxon. It is a celebration of the diversity of amphibian life and the ecological and behavioral adaptations that have made it a successful component of terrestrial and aquatic ecosystems. Synthesizing seventy years of research on amphibian biology, Kentwood D. Wells addresses all major areas of inquiry, including phylogeny, classification, and morphology; aspects of physiological ecology such as water and temperature relations, respiration, metabolism, and energetics; movements and orientation; communication and social behavior; reproduction and parental care; ecology and behavior of amphibian larvae and ecological aspects of metamorphosis; ecological impact of predation on amphibian populations and antipredator defenses; and aspects of amphibian community ecology. With an eye towards modern concerns, The Ecology and Behavior of Amphibians concludes with a chapter devoted to amphibian conservation. An unprecedented scholarly contribution to amphibian biology, this book is eagerly anticipated among specialists.
Download or read book Conservation Physiology written by Christine L. Madliger and published by Oxford University Press, USA. This book was released on 2020 with total page 361 pages. Available in PDF, EPUB and Kindle. Book excerpt: Conservation physiology is a rapidly expanding, multidisciplinary field that utilizes physiological knowledge and tools to understand and solve conservation challenges. This novel text provides the first consolidated overview of its scope, purpose, and applications, with a focus on wildlife. It outlines the major avenues and advances by which conservation physiology is contributing to the monitoring, management, and restoration of wild animal populations. This book also defines opportunities for further growth in the field and identifies critical areas for future investigation. By using a series of global case studies, contributors illustrate how approaches from the conservation physiology toolbox can tackle a diverse range of conservation issues including the monitoring of environmental stress, predicting the impact of climate change, understanding disease dynamics, improving captive breeding, and reducing human-wildlife conflict. Moreover, by acting as practical road maps across a diversity of sub-disciplines, these case studies serve to increase the accessibility of this discipline to new researchers. The diversity of taxa, biological scales, and ecosystems highlighted illustrate the far-reaching nature of the discipline and allow readers to gain an appreciation for the purpose, value, applicability, and status of the field of conservation physiology. Conservation Physiology is an accessible supplementary textbook suitable for graduate students, researchers, and practitioners in the fields of conservation science, eco-physiology, evolutionary and comparative physiology, natural resources management, ecosystem health, veterinary medicine, animal physiology, and ecology.
Download or read book Evolutionary Ecology of Amphibians written by Gregorio Moreno-Rueda and published by CRC Press. This book was released on 2023-06-30 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt: Amphibians are the oldest tetrapod group and show an astonishing diversity in lifestyles, many of them being unique. However, globally, they are on a decline. Hence, their study is fundamental to understanding the evolution of diversity and conserving them. This book, authored by experts from around the world, summarizes the current knowledge on the evolutionary ecology of amphibians. The book treats biological concepts related to the evolution, ecology, physiology, immunology, behaviour, and morphology of amphibians in their different states. This book constitutes an actualized work indispensable for evolutionary ecologists and herpetologists.
Download or read book The Longleaf Pine Ecosystem written by Shibu Jose and published by Springer Science & Business Media. This book was released on 2006-05-18 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: The longleaf pine ecosystem, once one of the most extensive ecosystems in North America, is now among the most threatened. Over the past few centuries, land clearing, logging, fire suppression, and the encroachment of more aggressive plants have led to an overwhelming decrease in the ecosystem’s size, to approximately 2.2% of its original coverage. Despite this devastation, the range of the longleaf still extends from Virginia to Texas. Through the combined efforts of organizations such as the USDA Forest Service, the Longleaf Alliance, and the Nature Conservancy, extensive programs to conserve, restore, and manage the ecosystem are currently underway. The longleaf pine ecosystem is valued not only for its aesthetic appeal, but also for its outstanding biodiversity, habitat value, and for the quality of the longleaf pine lumber. It has a natural resistance to fire and insects, and supports more than thirty threatened or endangered plant and animal species, including the red-cockaded woodpecker and the gopher tortoise. The Longleaf Pine Ecosystem unites a wealth of current information on the ecology, silviculture, and restoration of this ecosystem. The book also includes a discussion of the significant historical, social, and political aspects of ecosystem management, making it a valuable resource for students, land managers, ecologists, private landowners, government agencies, consultants, and the forest products industry. About the Editors: Dr. Shibu Jose is Associate Professor of Forest Ecology and Dr. Eric J. Jokela is Professor of Silviculture at the School of Forest Resources and Conservation at the University of Florida in Gainesville. Dr. Deborah L. Miller is Associate Professor of Wildlife Ecology in the Department of Wildlife Ecology and Conservation at the University of Florida in Milton.
Download or read book Amphibian conservation action plan proceedings IUCN SSC Amphibian Conservation Summit 2005 written by and published by IUCN. This book was released on 2007 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Contributions of Behavior and Physiology to Conservation Biology written by Susan C. Walls and published by Frontiers Media SA. This book was released on 2020-03-30 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Amphibian Species in Environmental Risk Assessment Strategies written by Marcelo L Larramendy and published by Royal Society of Chemistry. This book was released on 2023-12-18 with total page 303 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the expansion of human settlements and the environmental changes brought about by human activity and pollutants, toxicology and risk assessment of amphibian species has become increasingly of interest to toxicologists involved in environmental research. This book focuses specifically on environmental risk assessment in premetamorphic stages and adults of amphibians. Amphibian ecotoxicology is not totally understood in scientific research and as such environmental risk assessment in these vertebrates is an area of rapidly growing interest. It has the potential to answer some of the questions regarding risks to our environment. An ideal companion, this book will be useful to toxicologists and ecologists investigating risk assessment in the environments of amphibians, while also of interest to those working in conservation biology, biological invasion, biocontrol and habitat management.
Download or read book Amphibian Declines written by Michael J. Lannoo and published by Univ of California Press. This book was released on 2005-06-15 with total page 1124 pages. Available in PDF, EPUB and Kindle. Book excerpt: Documents in comprehensive detail a major environmental crisis: rapidly declining amphibian populations and the disturbing developmental problems that are increasingly prevalent within many amphibian species.
Download or read book Ecology of Amphibian Microbial Symbioses written by Eria A. Rebollar and published by Frontiers Media SA. This book was released on 2019-08-02 with total page 275 pages. Available in PDF, EPUB and Kindle. Book excerpt: The field of amphibian microbial ecology has greatly advanced in recent years. The work published to date has shown that amphibian skin bacterial communities can be influenced by host species, host life-history stage, environmental conditions, surrounding bacterial communities that serve as reservoirs and external biotic agents such as pathogens. As the ecology of amphibian-microbial symbiosis is a relatively new field, there are still many unanswered questions. The aim of this Research Topic is to highlight recent research on amphibian microbiomes that addresses relevant questions on the ecology of amphibian-microbe interactions. The publications gathered in this Research Topic have expanded our knowledge on the role of microbial symbionts of amphibians and have revealed novel insights that can direct the next set of research questions. We suggest that soon the field will move from the basic (and necessary) descriptions of microbial communities to more experimental approaches that include the use of omics methods and a variety of novel analytic and multivariate approaches. In addition to providing more insights into the microbial and disease ecology of amphibians, these studies may lead to effective ways to manipulate the microbiome to achieve protection from diseases, such as chytridiomycosis.
Download or read book Early Life History of Fish written by E. Kamler and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 279 pages. Available in PDF, EPUB and Kindle. Book excerpt: Among the fishes, a remarkably wide range of biological adaptations to diverse habitats has evolved. As well as living in the conventional habitats of lakes, ponds, rivers, rock pools and the open sea, fish have solved the problems of life in deserts, in the deep sea, in the cold Antarctic, and in warm waters of high alkalinity or of low oxygen. Along with these adaptations, we find the most impressive specializations of morphology, physiology and behaviour. For example we can marvel at the high-speed swimming of the marlins, sailfish and warm-blooded tunas, air breathing in catfish and lungfish, parental care in the mouth-brooding cichlids and viviparity in many sharks and toothcarps. Moreover, fish are ofconsiderable importance to the survival ofthe human species in the form of nutritious and delicious food of numerous kinds. Rational exploitation and management of our global stocks of fishes must rely upon a detailed and precise insight of their biology. The Chapman and Hall Fish and Fisheries Series aims to present timely volumes reviewing important aspects of fish biology. Most volumes will be of interest to research workers in biology, zoology, ecology and physiology, but an additional aim is for the books to be accessible to a wide spectrum ofnon specialist readers ranging from undergraduates and postgraduates to those with an interest in industrial and commercial aspects of fish and fisheries.
Download or read book Applications of Conservation Physiology to Wildlife Fitness and Population Health written by Terri J. Maness and published by Frontiers Media SA. This book was released on with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the great challenges in ecophysiology is linking physiological measures in wild animal populations with changes in individual fitness. Physiological variables that indicate nutritional state, stress, disease, or injury are used extensively in veterinary practice and captive settings to assess the health and likelihood of reproductive success of many animals. The development and refinement of sampling methods that limit disturbance of animals, coupled with advancements in analytical methods have allowed researchers to begin to examine the relevance of these physiological parameters in wild animals for predicting population trends and response to environmental perturbations. However, despite extensive research in this field, consistent correlations between fitness and/or population health and physiological measures remain rare.
