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  • 1
    ISSN: 1432-1009
    Keywords: Population viability analysis ; Wildlife conservation and policy ; Small populations ; Australia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Wildlife conservation policy for endangered species restoration follows a six-phase process. Population viability analysis (PVA) can play a major contributing role in four of these. PVA, as discussed here, is a technique where extinction vulnerabilities of small populations are estimated using computer simulation modeling. The benefits and limitations of using PVA in wildlife decision and policy processes are reviewed based on our direct experience. PVA permits decision makers to set time frames for management, estimate the required magnitude of restoration efforts, identify quantitative targets for species recovery, and select, implement, monitor, and evaluate management strategies. PVA is of greatest value for rare species policy and management. However, a limitation of PVA simulation models is that they are constrained by the amount of biological data available, and such data are difficult to obtain from small populations that are at immediate risk of extinction. These problems may be overcome with improved models and more data. Our experience shows benefits of PVA far outweigh its limitations, and applications of the approach are most useful when integrated with decision analysis and completed within an adaptive management philosophy. PVAs have been carried out for 14 Victorian species and less used elsewhere in Australia. Management and recovery plans are developed from these PVAs. We recommend that PVA be used to guide research programs, develop conservation strategies, and inform decision and policy making for both endangered and nonendangered species because it can significantly improve many aspects of natural resource policy and management.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular modeling 6 (2000), S. 133-149 
    ISSN: 0948-5023
    Keywords: Keywordsσ*-aromaticity, Hyperconjugation, ab initio calculations, Phosphorus rings, Weak interactions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The structures and energies of unsaturated three-membered rings of the general formula (CH)2XYn m, with charge = m and n substituents Y at X (Y = fluorine, chlorine, bromine, hydrogen, X = phosphorus, silicon, nitrogen, carbon) are compared to their saturated analogs. The structures were optimized with B3LYP/6-311+G(2d,p) and at MP2/6-31+G(d), with single point energy calculations on the latter geometries at MP4SDTQ/6-31+G(d). The geometrical changes in bond lengths and angles, which correlate with substituent electronegativities, are discussed for the different ring systems. The relative stabilities of unsaturated and saturated rings are compared using isodesmic ring-opening reactions and homodesmic substituent-exchange reactions. σ*-Aromaticity, a hyperconjugative effect found in the disubstituted rings, causes lowering of ring strain energies for the unsaturated rings and preference of unsaturated rings over saturated ones for the more electronegative substituents. For the mono-substituted π-aromatic silacyclopropenes and cyclopropenes, a destabilization by more electronegative ligands is found. For the neutral rings monosubstituted at main group V atoms like the 1H-phosphirenes and also the isoelectronic negatively charged rings with main group IV atoms like the silacyclopropenium anions, no correlation of stabilization energies or geometrical changes with ligand electronegativity is found.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular modeling 1 (1995), S. 79-122 
    ISSN: 0948-5023
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Preface As editor of this journal and as secretary of the Molecular Graphics and Modelling Society (Deutschsprachige Sektion), I have pleasure in presenting this volume: It contains a wealth of material including all aspects of molecular modeling, ranging from method development and application to multimedia data presentation. With over 200 attendees the workshop attracted more people than ever before. As always, the meeting was devoted mainly to talks by graduate students and postdocs, so that the traditional workshop character was once again evident. Thanks are due to all those who have submitted contributions and the keynote speakers Manfred Sippl (University of Vienna), Hugo Kubinyi (BASF Ludwigshafen) and Gerd Volkers (ETH Zuerich). Special thanks go to Dr. Michael Krug (Merck, Darmstadt) who was in charge of the organization of the scientific program and to Prof. Juergen Brickmann and his group for trouble-free course of the technical part of the program that also offered the chance to get insight into the possibilities of real multimedia application in the field of molecular modeling. The abstracts collected here give a flavour of the meeting. We do hope that this collection of abstracts will encourage attendance of the 10th Molecular Modelling Workshop 1996 in Darmstadt. The Molecular Modelling Workshops are organized under the auspices of the Molecular Graphics and Modelling Society - Deutschsprachige Sektion. Tim Clark, Erlangen 6th July 1995
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular modeling 6 (2000), S. 65-66 
    ISSN: 0948-5023
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Environmental management 13 (1989), S. 159-170 
    ISSN: 1432-1009
    Keywords: Endangered species ; Recovery programs ; Organizations ; Bureaucracy ; Case studies
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Endangered species recovery is characterized by complexity and uncertainty in both its biological and organizational aspects. To improve performance in the organizational dimension, some models of organizations are briefly introduced with an emphasis on the organization as a system for processing information, i.e., for successfully dealing with the high uncertainty in the task environment. A strong task orientation,which rewards achievement of the primary goal, is suggested as ideal for this task, as is generative rationality, which encourages workers to observe, critique, and generate new ideas. The parallel organization—a flexible, participatory, problem-solving structure set up alongside traditional bureaucracies—is offered as a useful structure for meeting the demands of uncertainties encountered during recovery. Task forces and projects teams can be set up as parallel organizations. Improved managerial functions include coordinating roles to facilitate the flow and use of information; decision making to avoid “groupthink”—the defects, symptoms, and countermeasures are described; and productive, active management of the inevitable conflict. The inability of organizations to solve dilemmas, to examine their own structures and management, and to change themselves for more effective, efficient, and equitable performance is seen as the major obstacle to improved recovery programs. Some recommendations for effecting change in bureaucracies are made along with a call for case studies detailing the organizational dimensions of endangered species recovery programs.
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Environmental management 19 (1995), S. 649-663 
    ISSN: 1432-1009
    Keywords: Ecosystems ; Policy ; Management ; Greater Yellowstone ; Georges Bank ; Aoministration ; Organizational learning
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Ecosystem management links human activities with the functioning of natural environments over large spatial and temporal scales. Our examination of Greater Yellowstone and Georges Bank shows similarities exist between human uses, administrative characteristics, and some biophysical features. Each region faces growing pressures to replace traditional extractive uses with more sustainable extractive or noncommodity uses coupled with concern about endangered species. Ecosystem management as a set of practical guidelines for making decisions under evolving expectations is far from complete, and it embodies new demands on individuals and institutions. In each system these challenges are considered relative to: the public's symbolic understanding of the management challenge, ecosystem management ambiguities, information availability, information use, administrative setting, and learning capabilities of governance organizations Progress in making ecosystem management operational may occur as refinements in content and approach make it an increasingly attractive option for resource users, the public, and government officials.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1432-1009
    Keywords: KEY WORDS:
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Vernal pools, a variety of ephemeral wetlands, are threatened in many areas of the United States. As habitat fragmentation and degradation increase, some vernal pool amphibian species are declining in numbers. Uneven implementation of state regulations further hampers effective conservation. To prevent further species decline and vernal pool loss, we evaluated alternatives for improving vernal pool conservation. We used transcripts from a recent vernal pool conference, interviews with members of relevant interest groups, and a literature review to determine opportunities for and constraints on improving vernal pool conservation policy. Participants from different interest groups had very diverse views about appropriate protection strategies. We have examined these different perspectives and alternatives and offer policy recommendations on both the state and local level. These recommendations can foster awareness of vernal pools as unique habitats, increase protection of these areas, and expand citizen participation in the vernal pool regulatory process.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Environmental management 16 (1992), S. 423-433 
    ISSN: 1432-1009
    Keywords: Policy orientation ; Natural resource management ; Policy sciences ; Policy process
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract All natural resource managers want to contribute to successful conservation programs. Having and applying an explicit policy orientation is indispensable. The policy sciences are described and a case is made that, if natural resource managers utilize this set of conceptual and applied tools in their natural resource work, their effectiveness could be enhanced. The policy sciences offer a contextual, problem-oriented, and multimethod approach to meeting complex problems. Two kinds of knowledge are needed to solve problems—substantive knowledge about the resource and process knowledge about the decision and policy processes used to derive courses of management action. The interplay of science, analysis, and politics are examined. The wildlife management community is used to illustrate many points, including the important role implementation plays in the overall policy process.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Environmental management 13 (1989), S. 663-670 
    ISSN: 1432-1009
    Keywords: Endangered species ; Reintroduction ; Organizations ; Recovery programs ; Project teams
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Reintroduction of animals to the wild to establish free-ranging viable populations is a valuable conservation tool, but ecological skills alone are not enough to ensure a successful reintroduction; also needed to do the work are effectively designed and managed programs. This article suggests general guidelines for organizing and managing reintroduction programs, reviews some basic organizational issues, and considers ways to develop high-performance teams The need to integrate reintroduction programs into their larger interorganizational context is discussed. The reintroduction program's structure must be appropriate for its function and should be properly staffed, led, and buffered from its political environment It should process information well, learn rapidly from its own mistakes, and be creative A high-performance team devotes most of its energies to solving external rather than internal problems
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Human ecology 21 (1993), S. 447-457 
    ISSN: 1572-9915
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Energy, Environment Protection, Nuclear Power Engineering , Ethnic Sciences
    Type of Medium: Electronic Resource
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