Interpretation and Implications of Variability in Ecological Systems PDF Download
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Author: Robert Klinger
Publisher: Frontiers Media SA
ISBN: 2832551734
Category : Science
Languages : en
Pages : 206
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Book Description
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: Robert Klinger
Publisher: Frontiers Media SA
ISBN: 2832551734
Category : Science
Languages : en
Pages : 206
Get Book Here
Book Description
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: J. M. Bates
Publisher: ASTM International
ISBN: 9780803108011
Category : Science
Languages : en
Pages : 348
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Book Description
Author: W.K. Lauenroth
Publisher: Elsevier
ISBN: 0444597654
Category : Science
Languages : en
Pages : 995
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Book Description
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: Ralph G. Stahl, Jr.
Publisher: CRC Press
ISBN: 1420062638
Category : Science
Languages : en
Pages : 258
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Book Description
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: Kent Bradford
Publisher: John Wiley & Sons
ISBN: 1405173270
Category : Science
Languages : en
Pages : 391
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Book Description
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:
Publisher:
ISBN:
Category : Ecological integrity
Languages : en
Pages : 146
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Book Description
"The protocol described in this technical reference is designed to: be used only by knowledgeable, experienced people; provide a preliminary evaluation of soil/site stability, hydrologic function, and biotic integrity (at the ecological site level); be used to communicate fundamental ecological concepts to a wide variety of audiences; improve communication among interest groups by focusing discussion on critical ecosystem properties and processes; select monitoring sites in the development of monitoring programs; provide early warnings of potential problems and opportunities by helping land managers identify areas that are potentially at risk of degradation or where resource problems currently exist"--P. 1.
Author: Peter R. Grant
Publisher: Princeton University Press
ISBN: 0691263221
Category : Nature
Languages : en
Pages : 464
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Book Description
"A new, revised edition of Peter and Rosemary Grant's synthesis of their decades of research on Daphne Island"--
Author: Ziolo, Magdalena
Publisher: IGI Global
ISBN: 1799810356
Category : Business & Economics
Languages : en
Pages : 383
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Book Description
Sustainable development is necessary to counteract and mitigate the impact of socially harmful forces in a globalized world. However, sustainable development and its organizations must ensure the effective management of their funds and beneficial financial frameworks in order to best realize their sustainable goals. There is a need for studies that seek to understand how to connect sustainable development and the financial world in order to maximize the economic and environmental wellbeing of the world. Social, Economic, and Environmental Impacts Between Sustainable Financial Systems and Financial Markets is a pivotal reference source that examines the funding and monetary utilization of environmental and socially-responsible entities. Featuring research on topics such as green taxes, intergenerational equity, and shadow economy, this book is ideally designed for government officials, policymakers, economists, financial managers, sustainability developers, and academicians seeking current research on the relationship between new sustainable financial phenomena and negative global externalities.
Author: Benedikt Hallgrímsson
Publisher: Elsevier
ISBN: 0080454461
Category : Science
Languages : en
Pages : 594
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Book Description
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: Lorris G. Cockerham
Publisher: Routledge
ISBN: 1351464639
Category : Science
Languages : en
Pages : 640
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Book Description
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.
