05204nam 2200625Ia 450 991013905490332120200520144314.01-118-50217-51-118-50218-31-118-50215-9(CKB)2560000000102091(EBL)1207851(OCoLC)842337743(MiAaPQ)EBC1207851(DLC) 2013018479(Au-PeEL)EBL1207851(CaPaEBR)ebr10716672(CaONFJC)MIL496098(PPN)183727126(EXLCZ)99256000000010209120130503d2013 uy 0engur|n|---|||||rdacontentrdamediardacarrierFood webs and biodiversity[electronic resource] /Axel G. RossbergChichester, West Sussex Wiley-Blackwell20131 online resource (398 p.)Description based upon print version of record.0-470-97355-2 0-470-97354-4 Includes bibliographical references and index.Food Webs and Biodiversity: Foundations, Models, Data; Contents; Acknowledgments; List of Symbols; Part I: Preliminaries; 1 Introduction; 2 Models and Theories; 2.1 The usefulness of models; 2.2 What models should model; 2.3 The possibility of ecological theory; 2.4 Theory-driven ecological research; 3 Some Basic Concepts; 3.1 Basic concepts of food-web studies; 3.2 Physical quantities and dimensions; Part II: Elements of Food-Web Models; 4 Energy and Biomass Budgets; 4.1 Currencies of accounting; 4.2 Rates and efficiencies; 4.3 Energy budgets in food webs5 Allometric Scaling Relationships Between Body Size and Physiological Rates5.1 Scales and scaling; 5.2 Allometric scaling; 6 Population Dynamics; 6.1 Basic considerations; 6.1.1 Exponential population growth; 6.1.2 Five complications; 6.1.3 Environmental variability; 6.2 Structured populations and density-dependence; 6.2.1 The dilemma between species and stages; 6.2.2 Explicitly stage-structured population dynamics; 6.2.3 Communities of structured populations; 6.3 The Quasi-Neutral Approximation; 6.3.1 The emergence of food webs; 6.3.2 Rana catesbeiana and its resources6.3.3 Numerical test of the approximation6.4 Reproductive value; 6.4.1 The concept of reproductive value; 6.4.2 The role of reproductive value in the QNA; 6.4.3 Body mass as a proxy for reproductive value; 7 From Trophic Interactions to Trophic Link Strengths; 7.1 Functional and numerical responses; 7.2 Three models for functional responses; 7.2.1 Linear response; 7.2.2 Type II response; 7.2.3 Type II response with prey switching; 7.2.4 Strengths and weaknesses of these models; 7.3 Food webs as networks of trophic link strengths; 7.3.1 The ontology of trophic link strengths7.3.2 Variability of trophic link strengths8 Tropic Niche Space and Trophic Traits; 8.1 Topology and dimensionality of trophic niche space; 8.1.1 Formal setting; 8.1.2 Definition of trophic niche-space dimensionality; 8.2 Examples and ecological interpretations; 8.2.1 A minimal example; 8.2.2 Is the definition of dimensionality reasonable?; 8.2.3 Dependencies between vulnerability and foraging traits of a species; 8.2.4 The range of phenotypes considered affects niche-space dimensionality; 8.3 Determination of trophic niche-space dimensionality; 8.3.1 Typical empirical data8.3.2 Direct estimation of dimensionality8.3.3 Iterative estimation of dimensionality; 8.4 Identification of trophic traits; 8.4.1 Formal setting; 8.4.2 Dimensional reduction; 8.5 The geometry of trophic niche space; 8.5.1 Abstract trophic traits; 8.5.2 Indeterminacy in abstract trophic traits; 8.5.3 The D-dimensional niche space as a pseudo-Euclidean space; 8.5.4 Linear transformations of abstract trophic traits; 8.5.5 Non-linear transformations of abstract trophic traits; 8.5.6 Standardization and interpretation of abstract trophic traits; 8.5.7 A hypothesis and a convention8.5.8 Getting oriented in trophic niche space Food webs have now been addressed in empirical and theoretical research for more than 50 years. Yet, even elementary foundational issues are still hotly debated. One difficulty is that a multitude of processes need to be taken into account to understand the patterns found empirically in the structure of food webs and communities. Food Webs and Biodiversity develops a fresh, comprehensive perspective on food webs. Mechanistic explanations for several known macroecological patterns are derived from a few fundamental concepts, which are quantitatively linked to fielBiodiversityEcologyMathematical modelsFood chains (Ecology)Biodiversity.EcologyMathematical models.Food chains (Ecology)577/.16Rossberg Axel G.1969-988847MiAaPQMiAaPQMiAaPQBOOK9910139054903321Food webs and biodiversity2261321UNINA