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Biodiversity, arising at multiple levels, is known as a multi-dimensional and complex concept, but is also known to have a rather loose definition. Imprecise definitions are not very suitable for objective quantification or the rigour of economic valuation. Therefore, to construct a more substantial definition of value for biodiversity, a theoretical argument aiming to link biodiversity and functional (meaningful) information needs to be developed. A working hypothesis is that biodiversity is a measure of the total difference within a biological system, which can be summarised in terms of the system's total information content, of which functional information is a subset. Since functional information has systematic (non-random) Patterns, it therefore, coincides with the scientific meaning of biological complexity, thus providing the foundation of value in biodiversity. The theory presented sets the goal of estimating biological complexity from the potentially valuable information derived from empirical biodiversity metric data (ecological measures). To achieve this, the ecological properties ofa system, as they are measured by ecologists, were translated into a simply defined single valued property. This led to a conclusion that ifthere exists a systematic relationship among empirical biodiversity metrics, then there must be a unifying property underlying intrinsic value ofbiodiversity. Then, an advantage of a representation of biodiversity as information was demonstrated by comparing it with the most commonly used metric - species richness. It was shown that species richness missed a large proportion of diversity, emphasising the importance of additional ecological properties and the need for species databases to record functional traits, presence and abundances in communities, as well as phylogenetic information. Finally, by providing intellectual foundations and developing an analytical tool for biodiversity quantification, this study sets the goal for further research.
Resource-management decisions, especially in the area of protecting and maintaining biodiversity, are usually incremental, limited in time by the ability to forecast conditions and human needs, and the result of tradeoffs between conservation and other management goals. The individual decisions may not have a major effect but can have a cumulative major effect. Perspectives on Biodiversity reviews current understanding of the value of biodiversity and the methods that are useful in assessing that value in particular circumstances. It recommends and details a list of components-including diversity of species, genetic variability within and among species, distribution of species across the ecosystem, the aesthetic satisfaction derived from diversity, and the duty to preserve and protect biodiversity. The book also recommends that more information about the role of biodiversity in sustaining natural resources be gathered and summarized in ways useful to managers. Acknowledging that decisions about biodiversity are necessarily qualitative and change over time because of the nonmarket nature of so many of the values, the committee recommends periodic reviews of management decisions.
This Handbook describes the types of values usually associated with biodiversity. While there are exceptions to the need to prioritise economic values over other values, economic valuation has a sound theoretical foundation that can help clarify the tradeoffs implicit in public policy decisions.
All societies depend on biodiversity and biological resources, and policy makers are increasingly aware that development pressures are today generating unprecedented rates of biodiversity loss. The fact that biodiversity issues often receive low priority in policy decisions is at least in part due to problems involved in assessing its contribution to society -- these values defy easy description and quantification. What cannot be quantified, or is difficult to monitor and evaluate, is easy to disregard. The result is that biodiversity fails to compete on a level playing field in policy decisions with the forces driving their decline. This Handbook describes the types of values usually associated with biodiversity. While there are exceptions to the need to prioritise economic values over other cultural, traditional and spiritual values, economic valuation has a sound theoretical foundation that can help clarify the tradeoffs implicit in public policy decisions. On the other hand, the Handbook recognises the limitations of the economic approach, and considers how economic and non-economic values can eventually be reconciled. The Handbook also reviews the various methodological approaches often used to quantify these values. Data requirements and limitations are discussed. These methodologies are then applied to a series of concrete policy contexts, ranging from land use planning to the determination of legal damages for environmental degradation.
The importance of biodiversity valuation is widely understood in academia and is increasingly used in policy making and other fora. For example, the Convention on Biological Diversity (CBD), through the Conference of the Parties (COP), recognises that "economic valuation of biodiversity and biological resources is an important tool for well-targeted and calibrated economic incentive measures". Further, it encourages the Parties to "take into account economic, social, cultural and ethical valuation in the development of relevant incentive measures" (CBD COP Decision IV/10). Biodiversity valuation should be an integral part of environmental economic policy, providing information to policy makers in their quest to identify priorities and equate trade-offs. As part of its effort to support governments in using valuation methods to assess the value of biological diversity, the OECD commissioned this series of case studies. They cover the state of the art on economic valuation and on the interface between economic and ecological valuation.
4th edition of this classic Ecology text Computational methods have largely been replaced by descriptions of the available software Includes procedure information for R software and other freely available software systems Now includes web references for equipment, software and detailed methodologies
This accessible and timely book provides a comprehensive overview of how to measure biodiversity. The book highlights new developments, including innovative approaches to measuring taxonomic distinctness and estimating species richness, and evaluates these alongside traditional methods such as species abundance distributions, and diversity and evenness statistics. Helps the reader quantify and interpret patterns of ecological diversity, focusing on the measurement and estimation of species richness and abundance. Explores the concept of ecological diversity, bringing new perspectives to a field beset by contradictory views and advice. Discussion spans issues such as the meaning of community in the context of ecological diversity, scales of diversity and distribution of diversity among taxa Highlights advances in measurement paying particular attention to new techniques such as species richness estimation, application of measures of diversity to conservation and environmental management and addressing sampling issues Includes worked examples of key methods in helping people to understand the techniques and use available computer packages more effectively
This open access book features essays written by philosophers, biologists, ecologists and conservation scientists facing the current biodiversity crisis. Despite increasing communication, accelerating policy and management responses, and notwithstanding improving ecosystem assessment and endangered species knowledge, conserving biodiversity continues to be more a concern than an accomplished task. Why is it so?The overexploitation of natural resources by our species is a frequently recognised factor, while the short-term economic interests of governments and stakeholders typically clash with the burdens that implementing conservation actions imply. But this is not the whole story. This book develops a different perspective on the problem by exploring the conceptual challenges and practical defiance posed by conserving biodiversity, namely: on the one hand, the difficulties in defining what biodiversity is and characterizing that “thing” to which the word ‘biodiversity’ refers to; on the other hand, the reasons why assessing biodiversity and putting in place effective conservation actions is arduous.
Biodiversity loss is one of the major resource problems facing the world, and the policy options available are restricted by inappropriate economic tools which fail to capture the value of species and their variety. This study describes in non-technical terms how cost-benefit analysis techniques can be applied to species and species loss, and how they provide a measure of the efficiency of conservation measures. Only when conservation can be shown to pass such a basic economic test, the authors claim, will it be incorporated into policies.;David Pearce has also written Blueprint for a Green Economy.