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  • 1
    Online Resource
    Online Resource
    Cary :Oxford University Press, Incorporated,
    Keywords: Food chains (Ecology). ; Electronic books.
    Description / Table of Contents: Food webs are one of the most useful, and challenging, objects of study in ecology. These networks of predator-prey interactions, conjured in Darwin's image of a "tangled bank," provide a paradigmatic example of complex adaptive systems. This book is based on a February 2004 Santa Fe Institute workshop. Its authors treat the ecology of predator-prey interactions, food web theory, structure and dynamics. The book explores the boundaries of what is known of the relationship between structure and dynamics in ecological networks and will define directions for future developments in this field.
    Type of Medium: Online Resource
    Pages: 1 online resource (405 pages)
    Edition: 1st ed.
    ISBN: 9780199775057
    Series Statement: Santa Fe Institute Studies on the Sciences of Complexity Series
    DDC: 577/.16
    Language: English
    Note: Cover -- Contents -- Preface -- A. INTRODUCTION -- 1. From Small to Large Ecological Networks in a Dynamic World -- B. STRUCTURE OF COMPLEX ECOLOGICAL NETWORKS -- 2. The Network Structure of Food Webs -- Box A. Additional Model Complexity Reduces Fit to Complex Food-Web Structure -- Box B. Reply to Martinez and Cushing -- 3. Graph Theory and Food Webs -- 4. Parasites and Food Webs -- Box C. Sea Lampreys in Great Lakes Food Webs -- 5. The Structure of Plant-Animal Mutualistic Networks -- C. INTEGRATING ECOLOGICAL STRUCTURE AND DYNAMICS -- 6. Diversity, Complexity, and Persistence in Large Model Ecosystems -- 7. Exploring Network Space with Genetic Algorithms Modularity, Resilience, and Reactivity -- 8. Food-Web Structure and Dynamics: Reconciling Alternative Ecological Currencies -- D. ECOLOGICAL NETWORKS AS EVOLVING, ADAPTIVE SYSTEMS -- 9. Models of Food-Web Evolution -- 10. Phenotypic Plasticity and Species Coexistence: Modeling Food Webs as Complex Adaptive Systems -- 11. Exploring the Evolution of Ecosystems with Digital Organisms -- 12. Network Evolution: Exploring the Change and Adaptation of Complex Ecological Systems over Deep Time -- E. STABILITY AND ROBUSTNESS OF ECOLOGICAL NETWORKS -- 13. Ecological Network Meltdown from Habitat Loss and Fragmentation -- 14. Biodiversity Loss and Ecological Network Structure -- F. CONCLUSIONS -- 15. Challenges for the Future: Integrating Ecological Structure and Dynamics -- Index -- A -- B -- C -- D -- E -- F -- G -- H -- I -- J -- K -- L -- M -- N -- O -- P -- Q -- R -- S -- T -- U -- V -- W -- Y.
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  • 2
    Keywords: Food chains (Ecology) Congresses ; Food chains (Ecology) ; Food Chain ; Konferenzschrift ; Aufsatzsammlung ; Ökologie ; Nahrungskette ; Nahrungskette ; Ökologie
    Type of Medium: Book
    Pages: XVIII, 386 S. , Ill., graph. Darst.
    ISBN: 0195188160 , 9780195188165
    Series Statement: The Santa Fe Institute studies in the sciences of complexity
    Language: English
    Note: Includes bibliographical references
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  • 3
    ISSN: 1365-2958
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Swarming is a form of bacterial translocation that involves cell differentiation and is characterized by a rapid and co-ordinated population migration across solid surfaces. We have isolated a Tn5 mutant of Sinorhizobium meliloti GR4 showing conditional swarming. Swarm cells from the mutant strain QS77 induced on semi-solid minimal medium in response to different signals are hyperflagellated and about twice as long as wild-type cells. Genetic and physiological characterization of the mutant strain indicates that QS77 is altered in a gene encoding a homologue of the FadD protein (long-chain fatty acyl-CoA ligase) of several microorganisms. Interestingly and similar to a less virulent Xanthomonas campestris fadD(rpfB) mutant, QS77 is impaired in establishing an association with its host plant. In trans expression of multicopy fadD restored growth on oleate, control of motility and the symbiotic phenotype of QS77, as well as acyl-CoA synthetase activity of an Escherichia coli fadD mutant. The S. meliloti QS77 strain shows a reduction in nod gene expression as well as a differential regulation of motility genes in response to environmental conditions. These data suggest that, in S. meliloti, fatty acid derivatives may act as intracellular signals controlling motility and symbiotic performance through gene expression.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1574-6941
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Colonisation of Pinus halepensis roots by GFP-tagged Pseudomonas fluorescens Aur6 was monitored by epifluorescence microscopy and dilution plating. Aur6-GFP was able to colonise and proliferate on P. halepensis roots. Co-inoculation with the ectomycorrhizal fungus Suillus granulatus did not affect the bacterial colonisation pattern whereas it had an effect on bacterial density. Bacterial counts increased during the first 20 days of seedling growth, irrespective of seedlings being mycorrhizal or not. After 40 days, bacterial density significantly decreased and bacteria concentrated on the upper two-thirds of the pine root. The presence of S. granulatus significantly stimulated survival of bacteria in the root elongation zone where fungal colonisation was higher. The number of mycorrhizas formed by S. granulatus was not affected by co-inoculation with Aur6-GFP. Neither Aur6-GFP nor S. granulatus stimulated P. halepensis development when inoculated alone, but a synergistic effect was observed on seedling growth when bacteria and fungus were co-inoculated.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Journal of mathematical biology 32 (1994), S. 743-759 
    ISSN: 1432-1416
    Keywords: Phytoplankton ; Population dynamics ; Nutrient variability ; Global bifurcation result ; Periodic solution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Notes: Abstract The dynamics of a phytoplankton population growing in a chemostat under a periodic supply of nutrients is investigated with the model proposed by Droop. This model differs from the well-known Monod equations by incorporating nutrient storage by the cells. In spite of its nonlinearity and the time delays introduced by an internal nutrient pool, the model predicts a simple response to a periodic nutrient supply. The population is shown to oscillate with the same frequency as the forcing. To prove the existence of a periodic solution local and global bifurcation results are used. This work establishes a basis on which to evaluate experimental data against the model as a representation of the nutrient-phytoplankton interaction when nutrients fluctuate.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 436 (2005), S. 696-700 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Outbreaks of many infectious diseases, including cholera, malaria and dengue, vary over characteristic periods longer than 1 year. Evidence that climate variability drives these interannual cycles has been highly controversial, chiefly because it is difficult to isolate the contribution of ...
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Bulletin of mathematical biology 58 (1996), S. 595-609 
    ISSN: 1522-9602
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Type of Medium: Electronic Resource
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