Interpretation And Implications Of Variability In Ecological Systems
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Author | : Robert Klinger |
Publisher | : Frontiers Media SA |
Total Pages | : 206 |
Release | : 2024-07-22 |
Genre | : Science |
ISBN | : 2832551734 |
Numerous hypotheses have been proposed to explain the dynamics in abundance of individual species, how species interact, how communities assemble, and how interactions between biotic and abiotic processes shape ecosystem stability. Many if not most of these hypotheses find some degree of support, but often only within relatively narrow spatial and temporal ranges. This is because conditions vary over time and from place to place, and so the strength and extent of processes that were the focus of a given a hypothesis become altered by other forces. Ecologists have confronted variability from two perspectives; conceptual and statistical. Conceptually, spatial and temporal variability are now recognized as being scale dependent and hierarchical. Statistically, there are many models that ecologists readily use that account for the hierarchical and scale-dependence of variability present in many datasets. But linking the two perspectives into a meaningful understanding of what variability means in real systems has been much less successful. For example, it is common to see studies where the fixed effects of a generalized linear mixed model are reported, but very often random effects are completely ignored or, at best, given scant attention. The likelihood of this being a significant problem increases greatly in what are rapidly becoming more common studies that utilize datasets spanning long temporal and/or large spatial scales, or when extreme and often unpredictable events (gray and black swans) occur.
Author | : Francesco de Bello |
Publisher | : Cambridge University Press |
Total Pages | : 311 |
Release | : 2021-03-11 |
Genre | : Nature |
ISBN | : 1108472915 |
Trait-based ecology is rapidly expanding. This comprehensive and accessible guide covers the main concepts and tools in functional ecology.
Author | : |
Publisher | : ASTM International |
Total Pages | : 343 |
Release | : 1979 |
Genre | : |
ISBN | : |
Author | : Kent Bradford |
Publisher | : John Wiley & Sons |
Total Pages | : 391 |
Release | : 2008-04-15 |
Genre | : Science |
ISBN | : 1405173270 |
The formation, dispersal and germination of seeds are crucial stages in the life cycles of gymnosperm and angiosperm plants. The unique properties of seeds, particularly their tolerance to desiccation, their mobility, and their ability to schedule their germination to coincide with times when environmental conditions are favorable to their survival as seedlings, have no doubt contributed significantly to the success of seed-bearing plants. Humans are also dependent upon seeds, which constitute the majority of the world’s staple foods (e.g., cereals and legumes). Seeds are an excellent system for studying fundamental developmental processes in plant biology, as they develop from a single fertilized zygote into an embryo and endosperm, in association with the surrounding maternal tissues. As genetic and molecular approaches have become increasingly powerful tools for biological research, seeds have become an attractive system in which to study a wide array of metabolic processes and regulatory systems. Seed Development, Dormancy and Germination provides a comprehensive overview of seed biology from the point of view of the developmental and regulatory processes that are involved in the transition from a developing seed through dormancy and into germination and seedling growth. It examines the complexity of the environmental, physiological, molecular and genetic interactions that occur through the life cycle of seeds, along with the concepts and approaches used to analyze seed dormancy and germination behavior. It also identifies the current challenges and remaining questions for future research. The book is directed at plant developmental biologists, geneticists, plant breeders, seed biologists and graduate students.
Author | : Ralph G. Stahl, Jr. |
Publisher | : CRC Press |
Total Pages | : 258 |
Release | : 2007-11-19 |
Genre | : Science |
ISBN | : 1420062638 |
Choosing the optimal management option requires environmental risk managers and decision makers to evaluate diverse, and not always congruent, needs and interests of multiple stakeholders. Understanding the trade-offs of different options as well as their legal, economic, scientific, and technological implications is critical to performing accurate
Author | : Peter R. Grant |
Publisher | : Princeton University Press |
Total Pages | : 464 |
Release | : 2024-11-12 |
Genre | : Nature |
ISBN | : 0691263221 |
"A new, revised edition of Peter and Rosemary Grant's synthesis of their decades of research on Daphne Island"--
Author | : W.K. Lauenroth |
Publisher | : Elsevier |
Total Pages | : 995 |
Release | : 2013-10-22 |
Genre | : Science |
ISBN | : 0444597654 |
The International Society for Ecological Modelling (ISEM) sponsors conferences, workshops and training courses with the aim of advancing the development of ecological and environmental modelling. The 3rd International Conference on the state-of-the-art in ecological modelling was sponsored by the ISEM in cooperation with the National Park Service Water Resources Laboratory and hosted by the Natural Resource Ecology Laboratory at Colorado State University. Its theme was the application of ecological modelling to environmental management and this book contains the full texts of the three invited papers presented in the five general sessions, plus the final summaries and syntheses of the topics covered during those sessions.
Author | : Lorris G. Cockerham |
Publisher | : Routledge |
Total Pages | : 646 |
Release | : 2019-07-05 |
Genre | : Science |
ISBN | : 1351464620 |
Basic Environmental Toxicology provides a thorough, systematic introduction to environmental toxicology and addresses many of the effects of pollutants on humans, animals, and the environment. Readers are introduced to the fundamentals of toxicology and ecotoxicology, the effects of different types of toxicants, and how toxicants affect different compartments of the environment. Fundamental aspects of environmental health, occupational health, detection of pollutants, and risk assessment are discussed. The book is excellent for anyone involved in risk assessment or risk management, toxicologists, state and local public health officials, environmental engineers, industrial managers, consultants, and students taking environmental toxicology courses.
Author | : Benedikt Hallgrímsson |
Publisher | : Elsevier |
Total Pages | : 594 |
Release | : 2011-05-04 |
Genre | : Science |
ISBN | : 0080454461 |
Darwin's theory of evolution by natural selection was based on the observation that there is variation between individuals within the same species. This fundamental observation is a central concept in evolutionary biology. However, variation is only rarely treated directly. It has remained peripheral to the study of mechanisms of evolutionary change. The explosion of knowledge in genetics, developmental biology, and the ongoing synthesis of evolutionary and developmental biology has made it possible for us to study the factors that limit, enhance, or structure variation at the level of an animals' physical appearance and behavior. Knowledge of the significance of variability is crucial to this emerging synthesis. Variation situates the role of variability within this broad framework, bringing variation back to the center of the evolutionary stage. - Provides an overview of current thinking on variation in evolutionary biology, functional morphology, and evolutionary developmental biology - Written by a team of leading scholars specializing on the study of variation - Reviews of statistical analysis of variation by leading authorities - Key chapters focus on the role of the study of phenotypic variation for evolutionary, developmental, and post-genomic biology
Author | : David D. Briske |
Publisher | : Springer |
Total Pages | : 664 |
Release | : 2017-04-12 |
Genre | : Technology & Engineering |
ISBN | : 3319467093 |
This book is open access under a CC BY-NC 2.5 license. This book provides an unprecedented synthesis of the current status of scientific and management knowledge regarding global rangelands and the major challenges that confront them. It has been organized around three major themes. The first summarizes the conceptual advances that have occurred in the rangeland profession. The second addresses the implications of these conceptual advances to management and policy. The third assesses several major challenges confronting global rangelands in the 21st century. This book will compliment applied range management textbooks by describing the conceptual foundation on which the rangeland profession is based. It has been written to be accessible to a broad audience, including ecosystem managers, educators, students and policy makers. The content is founded on the collective experience, knowledge and commitment of 80 authors who have worked in rangelands throughout the world. Their collective contributions indicate that a more comprehensive framework is necessary to address the complex challenges confronting global rangelands. Rangelands represent adaptive social-ecological systems, in which societal values, organizations and capacities are of equal importance to, and interact with, those of ecological processes. A more comprehensive framework for rangeland systems may enable management agencies, and educational, research and policy making organizations to more effectively assess complex problems and develop appropriate solutions.