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  • 1
    Online-Ressource
    Online-Ressource
    San Diego :Elsevier Science & Technology,
    Schlagwort(e): Aquatisches eOkosystem. ; Electronic books.
    Materialart: Online-Ressource
    Seiten: 1 online resource (313 pages)
    Ausgabe: 1st ed.
    ISBN: 9780124170209
    DDC: 577.6
    Sprache: Englisch
    Anmerkung: Front Cover -- Aquatic Functional Biodiversity -- Copyright -- Contents -- Contributors -- Perspective: Functional Biodiversity during the Anthropocene -- TERMINOLOGY AND CONCEPTUAL ISSUES INECOLOGICAL AND EVOLUTIONARY PERSPECTIVES -- CONCEPTUAL FRAMEWORKS IN ECOLOGICALAND EVOLUTIONARY SCIENCES -- BIODIVERSITY AND ECOSYSTEM SERVICE CONSERVATION -- REFERENCES -- Section I - Theoretical Background -- Chapter 1 - From Metabolic Constraints on Individuals to the Dynamics of Ecosystems -- INTRODUCTION -- INDIVIDUAL METABOLIC RATE, BIOMECHANICS, AND FITNESS -- The Size-and-Temperature Dependence of Metabolic Rate -- From Metabolic Rate to Fitness -- Evolution of Metabolic Rates and Thermal Physiology -- FROM INDIVIDUAL METABOLISM AND BIOMECHANICS TO INTERACTIONS -- A Metabolic Theory for Species Interactions -- Empirical Support -- FROM INTERACTIONS TO CONSUMER-RESOURCE DYNAMICS -- Ecological Consumer-Resource Dynamics -- Eco-Evolutionary Consumer-Resource Dynamics -- FROM CONSUMER-RESOURCE PAIRS TO COMMUNITY AND ECOSYSTEM DYNAMICS -- CONCLUSIONS -- ABBREVIATIONS AND MATHEMATICAL SYMBOLS -- ACKNOWLEDGMENTS -- REFERENCES -- Chapter 2 - Ecological Effects of Intraspecific Consumer Biodiversity for Aquatic Communities and Ecosystems -- INTRODUCTION -- CASE STUDIES -- Migration and Foraging Trait Divergence in Alewife -- Life History Divergence in the Trinidadian Guppy -- Divergence Due to Predators and Toxic Prey in Daphnia -- Foraging Habitat Divergence in Threespine Stickleback -- Within-Population Variation in Feeding Behavior in Pale Chub -- META-ANALYSIS -- CONCLUSIONS -- ACKNOWLEDGMENTS -- REFERENCES -- Chapter 3 - How Does Evolutionary History Alter the Relationship between Biodiversity and Ecosystem Function? -- INTRODUCTION -- METHODS -- Resource Competition Models -- Model 1: Partially Substitutable Resources -- Case 2: Essential Resources. , Model Analysis -- Reanalysis of Empirical Data -- RESULTS -- DISCUSSION -- ABBREVIATION -- ACKNOWLEDGMENTS -- REFERENCES -- Chapter 4 - Effects of Metacommunity Networks on Local Community Structures: From Theoretical Predictions to Empirical Eval ... -- INTRODUCTION -- FOUR PARADIGMS -- Patch Dynamics and Mass Effect -- Patch Dynamics -- Mass Effect -- Species Sorting -- Neutral Mechanisms -- Theory Data -- Metacommunity Networks -- Community-Level Properties -- Metacommunity-Level Properties -- Weighted Metacommunity Networks -- Methodologies for Estimating Metacommunity Networks -- Maximum Entropy -- ACKNOWLEDGMENTS -- REFERENCES -- Section II - Across Aquatic Ecosystems -- Chapter 5 - Limited Functional Redundancy and Lack of Resilience in Coral Reefs to Human Stressors -- INTRODUCTION -- DATA QUALITY -- PATTERN OF CHANGE -- DRIVERS OF CHANGE -- ARE CORAL REEFS FUNCTIONALLY REDUNDANT? -- SOLUTIONS TO ENSURE RESILIENCE -- Are there other Solutions Available? -- CONCLUDING REMARKS -- REFERENCES -- Chapter 6 - Biodiversity, Ecosystem Functioning, and Services in Fresh Waters: Ecological and Evolutionary Implications of ... -- INTRODUCTION -- Climate Change: An Environmental Stressor That Is More Than Just the Sum of Its Parts? -- Temperature and Metabolism: The Master Variables in Biological Responses to Global Warming -- Theoretical Frameworks: The Metabolic Theory of Ecology and Beyond -- Biodiversity-Ecosystem Functioning Relationships: How Many Species Do We Need to Maintain Functioning and Services in a Cha ... -- Are We Measuring the Relevant Drivers and Responses in Biodiversity-Ecosystem Functioning Studies? -- Traits and Functional Diversity in a Changing Climate: Beyond Body Size -- Structure and Functioning of Freshwater Food Webs -- From Averages to Individuals: The Common Currency of Freshwater Ecology. , Scaling Up: Cross-System Subsidies and Source-Sink Dynamics in Fresh waters -- Eco-evolutionary Dynamics: Reciprocal Feedbacks between Ecology and Evolution, and Interactions between Biotic and Abiotic ... -- Synergies between Multiple Stressors and the Modulation of Ecological and Evolutionary Responses in a Changing Climate -- Future Directions and Concluding Remarks -- REFERENCES -- Chapter 7 - Global Aquatic Ecosystem Services Provided and Impacted by Fisheries: A Macroecological Perspective -- INTRODUCTION -- MACROECOLOGICAL VARIABLES AND THEIR INTERACTIONS WITHIN AQUATIC ECOSYSTEMS -- Species Richness -- Abundance -- Geographical Distribution -- Body Size -- A CENTRAL CHALLENGE: IDENTIFYING PROCESSES UNDERLYING MACROECOLOGICAL PATTERNS -- Physical and Biological Associations with Macroecological Patterns -- Structural Relationships Among Key Variables and Predictions at Multiple Scales -- Dynamic Macroecological Patterns Driven by Anthropogenic and Natural Forces -- A TRAITS-BASED FOCUS ON AQUATIC FUNCTIONAL DIVERSITY -- ECOLOGICAL AND EVOLUTIONARY EFFECTS OF SELECTIVE FISHERIES ON AQUATIC ECOSYSTEM FUNCTIONING -- ACKNOWLEDGMENTS -- REFERENCES -- Chapter 8 - Valuing Biodiversity and Ecosystem Services in a Complex Marine Ecosystem -- INTRODUCTION -- MATERIALS AND METHODS -- Trophic Niche Dimensions and Parameters -- Consumer Trophic Niche Position -- Consumer Trophic Uniqueness -- Consumer Trophic Flexibility (= Trophic Niche Width) -- Assignment of Ecosystem Services on the Species Level -- Lough Hyne Data Set -- Statistical Analysis -- RESULTS -- Trophic Flexibility and Trophic Uniqueness of Lough Hyne Consumers -- Ecosystem Service Provisioning by Species of Lough Hyne -- DISCUSSION -- Trophic Niche Dimensions and Parameters -- Trophic Flexibility and Trophic Uniqueness of Lough Hyne Consumers. , Distribution of Trophic Flexibility and Trophic Uniqueness -- Ecosystem Service Provisioning by Species of Lough Hyne -- CONCLUSIONS -- REFERENCES -- Section III - In the Wild: Biodiversity and Ecosystem Service Conservation -- Chapter 9 - The Role of Marine Protected Areas in Providing Ecosystem Services -- INTRODUCTION -- INTRODUCTION TO MARINE PROTECTED AREAS -- INTRODUCTION TO ECOSYSTEM SERVICES AND THE LINK TO HUMAN WELL-BEING -- MARINE PROTECTED AREA EFFECTS ON INDIVIDUAL ECOSYSTEM SERVICES -- Marine Protected Area Effects on Provisioning Services: The Example of Fisheries -- Marine Protected Area Effects on Cultural Service: The Example of Recreational Activities -- Marine Protected Area Effects on Supporting Services: The Example of Coastal Protection -- MARINE PROTECTED AREA EFFECTS ON LONG-TERM ECOSYSTEM FUNCTION AND THE PROVISION OF MULTIPLE SERVICES -- The Role of Biodiversity: Expectations from Functional Diversity and Redundancy -- Quantifying and Protecting Functional Diversity and Redundancy in Marine Protected Areas -- Quantifying Functional Diversity -- Spatial Protection of Functional Diversity -- Effects of Marine Protected Areas on Functional Diversity -- KEY DIRECTIONS AND OPEN QUESTIONS -- REFERENCES -- Chapter 10 - Freshwater Conservation and Biomonitoring of Structure and Function: Genes to Ecosystems -- INTRODUCTION -- Current Focus of Aquatic Biomonitoring and Conservation -- State of the Art in the Science of Biomonitoring: From Species Traits to Community Structure and Ecosystem Functioning -- Future Advances and New Perspectives-Genes to Ecosystems -- Novel Molecular and Microbial Approaches -- The Functional Analysis of Microbes, Metazoans, and Macrofaunal Communities -- CONCLUDING REMARKS -- ACKNOWLEDGMENTS -- REFERENCES. , Epilogue - The Robustness of Aquatic Biodiversity Functioning under Environmental Change: The Ythan Estuary, Scotland -- INTRODUCTION -- SYSTEMS APPROACHES TO DEFINING OPERATIONAL BOUNDS FOR AQUATIC ECOSYSTEMS -- OPERATIONAL BOUNDS UNDER DIFFERENT POLICY OPTIONS: THE YTHAN EXAMPLE -- HOW DID THE NETWORK CHANGE BETWEEN 1967 AND 1993? -- DISCUSSION -- ACKNOWLEDGEMENTS -- REFERENCES -- Index.
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  • 2
    Online-Ressource
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    San Diego :Elsevier Science & Technology,
    Schlagwort(e): Climatic changes. ; Electronic books.
    Materialart: Online-Ressource
    Seiten: 1 online resource (537 pages)
    Ausgabe: 1st ed.
    ISBN: 9780123983213
    Serie: Issn Series
    DDC: 577
    Sprache: Englisch
    Anmerkung: Front Cover -- Global Change in Multispecies Systems Part 2 -- Copyright -- Contents -- Contributors -- Preface -- Editorial Commentary: Global Change in Multispecies Systems Part 2 -- References -- Chapter 1: Climate Change and Eco-Evolutionary Dynamics in Food Webs -- 1. Introduction -- 1.1. Climate change and ecological interactions -- 1.2. Recent advances in eco-evolutionary dynamics and implications for climate change -- 1.3. Eco-evolutionary dynamics and ecological networks -- 1.4. Individual-based models: modelling individual variation in ecology -- 1.5. The study of natural selection -- 2. Methods -- 2.1. An IBM framework to study eco-evolutionary dynamics in food webs -- 2.2. The aim of the simulations -- 2.3. Statistical analyses -- 2.3.1. Testing for differences in selection across environments -- 2.3.2. Estimating selection gradients in two contrasting environments -- 3. Results -- 3.1. From evolution to ecology -- 3.1.1. Trophic cascades -- 3.1.2. Encounter rates -- 3.2. From ecology to evolution -- 3.2.1. Testing for differences in selection across environments -- 3.2.2. Estimating selection gradients in two contrasting environments -- 4. Discussion -- 4.1. Temperature-dependent lifetime encounters, predator-induced stress and latitudinal diversity gradients -- 4.2. Correlational selection, diversification and ecosystem resilience -- 4.3. Contemporary evolution and the rescue of populations under climate change -- 4.4. Growth ratio and temperature: implications for the evolution of body size under global warming -- 4.5. Activation energy for metabolic rate: is adaptive evolution possible? -- 4.6. Climate change can affect the evolution of temperature-plastic behavioural (personality) traits -- 4.7. Future directions -- 4.7.1. Food Web Engineering: biological control, climate change and eco-evolutionary dynamics. , 4.7.2. Neutral theories, meta-communities and the geographic mosaic of co-evolution -- 5. Conclusions -- Acknowledgements -- Appendix -- A.1. Space and basal resources -- A.2. Predator and prey traits with quantitative genetic basis -- A.3. Trait modularity and phenotypic integration -- A.4. Quantitative Genetics and G-matrices -- A.5. State variables and the environmental component of phenotypic variation -- A.6. Moving algorithm: Adaptive movement and previous experience -- A.7. Moulting algorithm -- A.8. Reproductive algorithm -- A.9. Descriptions of functions or submodels according to the ODD protocol (Grimm et al., 2006) -- References -- Chapter 2: Impacts of Warming on the Structure and Functioning of Aquatic Communities: Individual- to Ecosystem-Level Responses -- 1. Introduction -- 1.1. Climate change: Identifying the key drivers and responses -- 1.2. The need for multi-scale and multi-level approaches for dealing with multi-species systems -- 1.3. Individuals, populations and environmental warming -- 1.4. Environmental warming impacts on species traits and trophic interactions -- 1.5. Linking communities to ecosystems: Food web and size structure -- 1.6. Environmental warming and ecosystem processes -- 1.7. Testing hypotheses in the Hengill system -- 2. Materials and Methods -- 2.1. Study site -- 2.2. Biotic characterisation -- 2.3. Individuals to populations: Testing temperature-size rules -- 2.4. Quantifying population-level traits and interactions -- 2.5. Quantifying community-level properties -- 2.6. Quantifying the food web and size structure: Community-ecosystem linkages -- 2.7. Ecosystem processes: Energy and nutrient cycling -- 2.8. Ecosystem processes: Ecosystem metabolism measurements -- 3. Results -- 3.1. Structure: Individuals to populations -- 3.2. Structure: Population-level traits. , 3.3. Structure: Population-level interactions -- 3.4. Structure: Community-level properties -- 3.5. Structure: Communities to ecosystems: Food web and size structure -- 3.6. Ecosystem processes: Energy and nutrient cycling -- 3.7. Ecosystem processes: Ecosystem metabolism measurements -- 4. Discussion -- 4.1. Individuals to populations -- 4.2. Population-level traits -- 4.3. Population-level interactions -- 4.4. Community-level properties -- 4.5. Communities to ecosystems: Food web and size structure -- 4.6. Ecosystem process rates: Energy and nutrient cycling -- 4.7. Ecosystem process rates: Ecosystem metabolism measurements -- 4.8. Caveats and limitations -- 4.9. Looking forward: An international partnership at Hengill -- 4.10. Conclusion -- Acknowledgements -- Appendix A. Physical and Chemical Properties of the Streams in the Hengill Catchment Examined in This Study -- Appendix B. Length-Mass Relationships and Biovolume Calculations for the Diatom, Ciliate, Flagellate, Meiofaunal and Macr ... -- Appendix C. Yield-Effort Curves to Validate the Efficiency of Diatom and Macroinvertebrate Sampling in All Streams in Apr ... -- Appendix D. Source of food web links -- Appendix E. Supplementary Methods -- E.1. Snail exclusion experiment -- E.2. Measures of interaction strength -- E.3. Laboratory ecosystem respiration experiment -- E.4. Field measurements of ecosystem metabolism and stream hydraulics -- References -- Chapter 3: Intrinsic and Extrinsic Factors Driving Match-Mismatch Dynamics During the Early Life History of Marine Fishes -- 1. Understanding Climate Impacts on Marine Fish -- 1.1. Match-mismatch and other marine fish recruitment hypotheses -- 1.2. Patterns of change during marine fish early life history -- 2. Extrinsic Factors and Early Life Stage Match-Mismatch Dynamics -- 2.1. Turbulence, light and turbidity. , 2.2. Ocean hydrography and dispersion/retention -- 2.3. Foraging at low Reynolds numbers -- 2.4. Foraging in patchy prey fields -- 3. Intrinsic Factors Affecting Match-Mismatch Dynamics -- 3.1. Spawning strategies of adults -- 3.2. Temperature-dependent development of embryos -- 3.3. Developmental morphology of larvae -- 3.4. Visual acuity and swimming capacity of early life stages -- 3.5. Foraging behaviour and tactics of early life stages -- 3.6. Metabolism and prey requirements of early life stages -- 4. Feeding Dynamics of Marine Fish Larvae in Their Natural Environment -- 4.1. Diets -- 4.2. The role of phytoplankton and protists -- 4.3. Feeding success -- 4.4. Prey sizes and ontogenetic diet shifts -- 5. Physiological-Based Modelling of Larval Foraging and Growth -- 5.1. Simulating match-mismatch dynamics using IBMs -- 5.2. Species-specific differences in intrinsic properties -- 6. Outlook and Recommendations -- Acknowledgements -- References -- Chapter 4: Marine Ecosystem Regime Shifts Induced by Climate and Overfishing: A Review for the Northern Hemisphere -- 1. Introduction -- 2. Theoretical Concepts: Regime Shifts and Alternative Stable States -- 2.1. Types of ecosystem responses to external drivers -- 2.2. Resilience and the interaction of multiple drivers -- 2.3. Alternative stable states -- 3. Marine Ecosystem Regime Shifts -- 3.1. Methods for identifying abrupt ecosystem changes -- 3.2. North Pacific -- 3.3. Eastern Scotian Shelf -- 3.4. North Sea -- 3.5. Baltic Sea -- 3.6. Black Sea -- 4. Trophic Cascades -- 4.1. Eastern Scotian Shelf -- 4.2. Baltic Sea -- 4.3. Black Sea -- 4.4. Vulnerability of marine ecosystems to overfishing-induced trophic cascading -- 4.5. Climate-induced changes in trophic control and oscillating control -- 5. Discussion -- 5.1. Synchronicity of timing-Evidence of atmospheric teleconnection. , 5.2. Trophic cascading-The importance of overfishing in triggering ecosystem regime shifts -- 5.3. Interactions of multiple drivers, alternative stable states and the reversibility of ecosystem regime shifts -- 6. Conclusions -- Acknowledgments -- References -- Chapter 5: Perturbing a Marine Food Web: Consequences for Food Web Structure and Trivariate Patterns -- 1. Introduction -- 1.1. Uni-, bi- and trivariate patterns -- 1.2. Study site -- 2. Methods and Materials -- 2.1. Experimental design -- 2.2. Applying the perturbation -- 2.3. Food web construction -- 2.4. Univariate parameters -- 2.4.1. Statistical analysis -- 2.5. Sørensens similarity indices -- 2.6. Bivariate patterns -- 2.7. Trivariate patterns -- 3. Results -- 3.1. Effectiveness of M. glacialis perturbation -- 3.2. Food web complexity effects -- 3.3. Trophic position effects -- 3.4. Similarity effects -- 3.5. Food web topology effects -- 3.6. Effects on bivariate patterns -- 3.6.1. Abundance-trophic height relationship -- 3.6.2. Body mass-trophic height relationship -- 3.6.3. Body mass-abundance relationship -- 3.6.4. Predator:prey abundance relationship -- 3.6.5. Predator:prey mass relationship -- 3.6.6. Predator:prey biomass relationship -- 3.6.7. Vulnerability and generality effects -- 3.7. Effects on trivariate patterns -- 4. Discussion -- Acknowledgments -- Appendix. Feeding Link Literature References -- References -- Chapter 6: Biomanipulation as a Restoration Tool to Combat Eutrophication: Recent Advances and Future Challenges -- 1. Introduction -- 2. Fish Manipulation -- 2.1. Fish manipulation in temperate lakes -- 2.1.1. Removing zooplanktivorous and benthivorous fish -- 2.1.2. Stocking of piscivorous fish -- 2.1.3. Longevity of the fish manipulation effects -- 2.1.4. Repeated measures-fish manipulation in Lake Væng, Denmark. , 2.1.5. Effects of fish manipulation judged from paleoecological studies.
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  • 3
    Online-Ressource
    Online-Ressource
    San Diego :Elsevier Science & Technology,
    Schlagwort(e): Ecology - Research. ; Electronic books.
    Materialart: Online-Ressource
    Seiten: 1 online resource (577 pages)
    Ausgabe: 1st ed.
    ISBN: 9780123972934
    Serie: Issn Series
    DDC: 577
    Sprache: Englisch
    Anmerkung: Front Cover -- Global Change in Multispecies Systems Part 1 -- Copyright -- Contents -- Contributors -- Preface: Editorial Commentary: Global Change in Multispecies Systems Part 1 -- On the Wishlist: Better Data and Predictive Frameworks -- A Matter of Time and Space: Temporal and Spatial Scale and Levels of Organisation -- A Question of Traits -- The Next Steps Forward -- References -- Chapter One: Distributional (In)Congruence of Biodiversity-Ecosystem Functioning -- 1. Introduction -- 1.1. Vexing drivers and responses -- 1.2. Contrasting dichotomies -- 1.3. Aims of our study -- 2. Scaling B-EF -- 2.1. Implications of scaling -- 2.2. Green world allometry -- 2.3. Allometry and management -- 3. Constraining B-EF -- 3.1. Allometry rules the world -- 3.2. How local biodiversity determines individual abundances at taxocene level -- 3.3. The extent to which scaling changes between taxocenes -- 4. Predicting B-EF -- 4.1. B-EF and functional redundancy in the blue world: Theoretical background -- 4.2. Inland water biodiversity: Effects of landscape complexity on B-EF -- 4.2.1. Streams and ecoregions -- 4.2.2. Computational methods -- 4.2.3. Can a web be robust? -- 4.3. Inland water biodiversity: Vulnerability of B-EF across ecoregions -- 4.4. Population fluctuations at standardized taxonomical resolution: A virtual case study -- 4.5. Superimposed disruption of fish biodiversity on cascading interactions -- 5. Conceptual Unification -- 5.1. Articulating B-EF in terrestrial ecosystems -- 5.2. Articulating B-EF in aquatic ecosystems -- 6. System-Driven B-EF -- 6.1. Elemental changes within one taxocene: Less is more -- 6.2. Elemental changes across taxocenes: Community mismatches -- 7. Coda -- Acknowledgements -- References -- Chapter Two: Biodiversity, Species Interactions and Ecological Networks in a Fragmented World -- 1. Introduction -- 2. Networks. , 2.1. Ecological networks -- 2.1.1. Properties of mutualistic and antagonistic networks -- 2.1.2. Body size as a driver of ecological network structure -- 2.1.3. Species abundance as a driver of ecological network structure -- 2.1.4. Functional groups in ecological networks -- 2.2. Spatial networks -- 2.3. Combining spatial and ecological networks -- 3. Habitat Fragmentation -- 3.1. General introduction -- 3.2. Fragment characteristics -- 3.3. Habitat edges -- 3.4. Matrix -- 3.5. Spatial and temporal turnover of species and individuals -- 3.6. Scales of habitat fragmentation -- 4. Habitat Fragmentation and Species Traits -- 4.1. Plant traits -- 4.2. Animal traits -- 4.3. Species trait combinations -- 5. Habitat Fragmentation and Biotic Interactions -- 5.1. Mutualistic plant-pollinator interactions -- 5.2. Mutualistic plant-frugivore interactions -- 5.3. Mutualistic plant-ant interactions -- 5.4. Antagonistic interactions within food webs -- 5.5. Antagonistic host-parasitoid interactions -- 5.6. Summary of fragmentation effects on mutualistic and antagonistic interactions -- 6. Effects of Habitat Fragmentation on Different Kinds of Networks -- 6.1. General introduction -- 6.2. Mutualistic plant-pollinator networks -- 6.2.1. Nestedness -- 6.2.2. Link switching -- 6.2.3. Modularity -- 6.2.4. Body size -- 6.2.5. Four fragmentation scenarios -- 6.3. Mutualistic plant-frugivore networks -- 6.4. Mutualistic plant-ant networks -- 6.5. Antagonistic food webs -- 6.6. Antagonistic host-parasitoid networks -- 6.7. General effects of habitat fragmentation on network properties -- 7. Habitat Fragmentation in a Meta-Network Context -- 7.1. Meta-networks and dispersal -- 7.2. Meta-networks and extinction -- 7.3. Meta-networks and colonisation -- 8. Effects of Habitat Fragmentation on the Coevolutionary Dynamics of Networks. , 8.1. The geographic mosaic theory of coevolution -- 8.2. Habitat fragmentation and its effects on basic components of GMTC -- 8.3. Habitat fragmentation and selection mosaics in ecological networks -- 9. Applications in Conservation and Agriculture -- 10. Conclusions -- Acknowledgements -- Appendix -- Methods for Ashdown Forest case study of food webs in fragmented river networks -- A.1. Site description and food web construction -- Glossary -- References -- Chapter Three: Climate Change Impacts on Community Resilience: Evidence from a Drought Disturbance Experiment -- 1. Introduction -- 1.1. Disturbance, community structure and climate change -- 1.2. Disturbance and diversity -- 1.3. Climate change and drought disturbance in streams -- 1.4. Mesocosm experiments -- 2. Methods -- 2.1. Mesocosms -- 2.2. Experimental design and application -- 2.3. Sampling and processing -- 2.4. Statistical analysis -- 3. Results -- 3.1. Disturbance effects on community descriptors -- 3.2. Disturbance effects on community structure -- 3.3. Disturbance effects on temporal dynamics -- 4. Discussion -- 4.1. Disturbance and diversity -- 4.2. Resilience and disturbance frequency -- 4.3. Resilience and ecosystem functioning -- 4.4. Disturbance and community development -- 4.5. Drought as an environmental filter -- 5. Conclusions -- Acknowledgments -- AppendixA -- AppendixB -- References -- Chapter Four: Environmental Warming in Shallow Lakes: A Review of Potential Changes in Community Structure as Evidenced from Space-for-Time Substitution Approaches -- 1. Introduction -- 1.1. Global change and freshwater communities -- 1.2. Shallow lakes and ecosystem responses to changes in temperature -- 1.3. Indirect effects of climate on community structure through availability of nutrients -- 1.4. Theoretical predictions -- 1.5. Space-for-time substitution approach. , 2. Findings in Space-for-Time Studies -- 2.1. Richness changes with climate -- 2.1.1. Fishes -- 2.1.2. Macroinvertebrates -- 2.1.3. Zooplankton -- 2.1.4. Macrophytes -- 2.1.5. Phytoplankton -- 2.1.6. Periphyton -- 2.1.7. Bacterioplankton -- 2.2. Climate effects on biomass -- 2.2.1. Fishes -- 2.2.2. Macroinvertebrates -- 2.2.3. Zooplankton -- 2.2.4. Macrophytes -- 2.2.5. Phytoplankton -- 2.2.6. Periphyton -- 2.2.7. Bacterioplankton -- 2.3. Climate effects on density -- 2.3.1. Fishes -- 2.3.2. Macroinvertebrates -- 2.3.3. Zooplankton -- 2.3.4. Macrophytes -- 2.3.5. Phytoplankton -- 2.3.6. Bacterioplankton -- 2.4. Climate effects on body size and size structure -- 2.4.1. Fishes -- 2.4.2. Macroinvertebrates -- 2.4.3. Zooplankton -- 2.4.4. Macrophytes -- 2.4.5. Phytoplankton -- 2.4.6. Periphyton -- 2.4.7. Bacterioplankton -- 2.5. Climate effects on reproduction and growth -- 2.5.1. Fishes -- 2.5.2. Macroinvertebrates -- 2.5.3. Zooplankton -- 2.5.4. Macrophytes -- 2.5.5. Phytoplankton, periphyton and bacterioplankton -- 2.6. Climate effects on intensity of trophic interactions -- 3. Discussion -- 3.1. Can we predict changes in community traits with warming? -- 3.1.1. Congruence of SFTS findings and theoretical expectations -- 3.1.2. Evidence of warming effects obtained by other approaches -- 3.1.3. The importance of local factors and trophic interactions -- 3.2. Advantages and disadvantages of the SFTS approach -- 3.3. Topics for further research -- Acknowledgements -- Appendix A. Periphyton Latitudinal Gradient -- Literature analyzed: -- Appendix B. Bacterioplankton Latitudinal Gradient -- Literature cited: -- Appendix C. Phytoplankton Unpublished Data and Latitudinal Gradient -- C.1. Previously unpublished data: The Netherlands-Uruguay comparison -- C.2. Latitudinal gradient meta-analysis -- Literature cited: -- References. , Chapter Five: Impact of Climate Change on Fishes in Complex Antarctic Ecosystems -- 1. Introduction -- 2. The Antarctic Marine Ecosystem -- 2.1. Geographical and physical conditions -- 2.2. Biological characteristics -- 3. Antarctic Fish Communities -- 3.1. Composition of the modern fauna -- 3.2. Evolution and adaptive radiation -- 3.3. Adaptations and characteristics of notothenioid fishes -- 3.3.1. Physiological and morphological adaptations -- 3.3.2. Growth, reproduction and development -- 3.4. Threats to the fish community -- 4. Physiological Vulnerability of Antarctic Fishes -- 4.1. Sensitivity to changes in temperature and salinity -- 4.2. Sensitivity to increasing pCO2 -- 5. Trophic Vulnerability of Antarctic Fishes -- 5.1. Vulnerability to general changes in trophic structure and dynamics -- 5.2. Vulnerability to changes in size structure and prey quality -- 5.2.1. Prey size -- 5.2.2. Prey quality -- 6. Vulnerability of Antarctic Fishes to Habitat Destruction -- 6.1. The impact of sea ice reduction -- 6.2. The impact of increased iceberg scouring -- 6.2.1. The role of habitat structure and disturbance events for species richness -- 6.2.2. The disturbance simulation model -- 7. Discussion -- 7.1. The impact of climate change on Antarctic fish species -- 7.2. Effects of climate change in other marine systems -- 7.3. Antarctic fish community persistence-Winners and losers -- 7.4. Consequences of fish species loss for the marine Antarctic ecosystem -- 7.5. Final thoughts-Is climate change exclusively to blame? -- Acknowledgements -- References -- Chapter Six: A Complete Analytic Theory for Structure and Dynamics of Populations and Communities Spanning Wide Ranges in Body Size -- 1. Introduction -- 1.1. Orientation on a changing planet -- 1.2. Size spectra -- 1.3. Mathematical size-spectrum models -- 1.4. Approximations. , 1.5. Structure of the paper.
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    In:  Supplement to: Arntz, Wolf E; Thatje, Sven; Gerdes, Dieter; Gili, Josep-Maria; Gutt, Julian; Jacob, Ute; Montiel, Américo; Orejas, Covadonga; Teixidó, Núria (2005): The Antarctic-Magellan connection: macrobenthos ecology on the shelf and upper slope, a progress report. Scientia Marina, 69 (Suppl. 2), 237-269, https://doi.org/10.3989/scimar.2005.69s2237
    Publikationsdatum: 2023-07-10
    Beschreibung: Ecological work carried out on the Antarctic and Magellan shelves since the first IBMANT conference held at the UMAG, Punta Arenas in 1997 is summarized to identify areas where progress has been made and others, where impor- tant gaps have remained in understanding past and present interaction between the Antarctic and the southern tip of South America. This information is complementary to a review on shallow-water work along the Scotia Arc (Barnes, 2005) and recent work done in the deep sea (Brandt and Hilbig, 2004). While principally referring to shipboard work in deeper water, above all during the recent international EASIZ and LAMPOS campaigns, relevant work from shore stations is also included. Six years after the first IBMANT symposium, significant progress has been made along the latitudinal gradient from the Magellan region to the high Antarctic in the fields of biodiversity, biogeography and community structure, life strategies and adaptations, the role of disturbance and its significance for biodiversity, and trophic coupling of the benthic realm with the water column and sea ice. A better understanding has developed of the role of evolutionary and ecological factors in shaping past and present-day environmental conditions, species composition and distribution, and ecosystem functioning. Furthermore, the science community engaged in unravelling Antarctic-Magellan interactions has advanced in methodological aspects such as new analytical approaches for comparing biodiversity derived from visual methods, growth and age determination, trophic modelling using stable isotope ratios, and molecular approaches for taxonomic and phylogenetic purposes. At the same time, much effort has been invested to complement the species inventory of the two adjacent regions. However, much work remains to be done to fill the numerous gaps. Some perspectives are outlined in this review, and sug- gestions are made where particular emphasis should be placed in future work, much of which will be developed in the frame of SCAR's EBA (Evolution and Biodiversity in the Antarctic) programme.
    Schlagwort(e): Amphipoda; ANT-XIII/3; ANT-XVII/3; Ascidiacea; Asteroidea; Austasen; Benthos, other; Bivalvia; Bottom trawl; Bryozoa; BT; Campaign of event; Comment; Depth, bathymetric; DEPTH, sediment/rock; Event label; Holothuroidea; Kapp Norvegia; Latitude of event; Latitude of event 2; Longitude of event; Longitude of event 2; Number of species; Ophiuroidea; Opisthobranchia; Polarstern; Polychaeta; Porifera; Prosobranchia; PS39/005-11; PS39/009-1; PS39/011-1; PS39/012-1; PS39/013-4; PS39/014-2; PS39/015-1; PS39/016-1; PS39/017-1; PS39 EASIZ; PS56/065-1; PS56/085-1; PS56/102-1; PS56/109-1; PS56/119-1; PS56/124-1; PS56/135-1; PS56/136-1; PS56 EASIZ III; Weddell Sea
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    PANGAEA
    In:  Supplement to: Jacob, Ute; Thierry, Aaron; Brose, Ulrich; Arntz, Wolf E; Berg, Sofia; Brey, Thomas; Fetzer, Ingo; Jonsson, Tomas; Mintenbeck, Katja; Möllmann, Christian; Petchey, Owen L; Riede, Jens O; Dunne, Jennifer A (2011): The role of body size in complex food webs: A cold case. Advances in Ecological Research, 45, 181-223, https://doi.org/10.1016/B978-0-12-386475-8.00005-8
    Publikationsdatum: 2023-10-28
    Beschreibung: Human-induced habitat destruction, overexploitation, introduction of alien species and climate change are causing species to go extinct at unprecedented rates, from local to global scales. There are growing concerns that these kinds of disturbances alter important functions of ecosystems. Our current understanding is that key parameters of a community (e.g. its functional diversity, species composition, and presence/absence of vulnerable species) reflect an ecological network's ability to resist or rebound from change in response to pressures and disturbances, such as species loss. If the food web structure is relatively simple, we can analyse the roles of different species interactions in determining how environmental impacts translate into species loss. However, when ecosystems harbour species-rich communities, as is the case in most natural systems, then the complex network of ecological interactions makes it a far more challenging task to perceive how species' functional roles influence the consequences of species loss. One approach to deal with such complexity is to focus on the functional traits of species in order to identify their respective roles: for instance, large species seem to be more susceptible to extinction than smaller species. Here, we introduce and analyse the marine food web from the high Antarctic Weddell Sea Shelf to illustrate the role of species traits in relation to network robustness of this complex food web. Our approach was threefold: firstly, we applied a new classification system to all species, grouping them by traits other than body size; secondly, we tested the relationship between body size and food web parameters within and across these groups and finally, we calculated food web robustness. We addressed questions regarding (i) patterns of species functional/trophic roles, (ii) relationships between species functional roles and body size and (iii) the role of species body size in terms of network robustness. Our results show that when analyzing relationships between trophic structure, body size and network structure, the diversity of predatory species types needs to be considered in future studies.
    Schlagwort(e): Environment; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas; Species; Species code; SPP1158; Weddell_Sea_Shelf; Weddell Sea
    Materialart: Dataset
    Format: text/tab-separated-values, 1464 data points
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  • 6
    Publikationsdatum: 2019-07-09
    Beschreibung: Predator-prey interactions in natural ecosystems generate complex food webs that have a simple universal body-size architecture where predators are systematically larger than their prey. Food-web theory shows that the highest predator-prey body-mass ratios found in natural food webs may be especially important because they create weak interactions with slow dynamics that stabilize communities against perturbations and maintain ecosystem functioning. Identifying these vital interactions in real communities typically requires arduous identification of interactions in complex food webs. Here, we overcome this obstacle by developing predator-trait models to predict average body-mass ratios based on a database comprising 290 food webs from freshwater, marine and terrestrial ecosystems across all continents. We analysed how species traits constrain body-size architecture by changing the slope of the predator-prey body-mass scaling. Across ecosystems, we found high body-mass ratios for predator groups with specific trait combinations including (1) small vertebrates and (2) large swimming or flying predators. Including the metabolic and movement types of predators increased the accuracy of predicting which species are engaged in high body-mass ratio interactions. We demonstrate that species traits explain striking patterns in the body-size architecture of natural food webs that underpin the stability and functioning of ecosystems, paving the way for community-level management of the most complex natural ecosystems.
    Repository-Name: EPIC Alfred Wegener Institut
    Materialart: Article , isiRev
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  • 7
    Publikationsdatum: 2020-03-12
    Beschreibung: Successfully predicting the future states of systems that are complex, stochastic, and potentially chaotic is a major challenge. Model forecasting error (FE) is the usual measure of success; however model predictions provide no insights into the potential for improvement. In short, the realized predictability of a specific model is uninformative about whether the system is inherently predictable or whether the chosen model is a poor match for the system and our observations thereof. Ideally, model proficiency would be judged with respect to the systems’ intrinsic predictability, the highest achievable predictability given the degree to which system dynamics are the result of deterministic vs. stochastic processes. Intrinsic predictability may be quantified with permutation entropy (PE), a model‐free, information‐theoretic measure of the complexity of a time series. By means of simulations, we show that a correlation exists between estimated PE and FE and show how stochasticity, process error, and chaotic dynamics affect the relationship. This relationship is verified for a data set of 461 empirical ecological time series. We show how deviations from the expected PE–FE relationship are related to covariates of data quality and the nonlinearity of ecological dynamics. These results demonstrate a theoretically grounded basis for a model‐free evaluation of a system's intrinsic predictability. Identifying the gap between the intrinsic and realized predictability of time series will enable researchers to understand whether forecasting proficiency is limited by the quality and quantity of their data or the ability of the chosen forecasting model to explain the data. Intrinsic predictability also provides a model‐free baseline of forecasting proficiency against which modeling efforts can be evaluated.
    Repository-Name: EPIC Alfred Wegener Institut
    Materialart: Article , isiRev
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  • 8
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    Unbekannt
    ROYAL SOC
    In:  EPIC3Philosophical Transactions of the Royal Society B-Biological Sciences, ROYAL SOC, 375(1814), ISSN: 0962-8436
    Publikationsdatum: 2020-11-12
    Beschreibung: Whereas the conservation and management of biodiversity has become a key issue in environmental sciences and policy in general, the conservation of marine biodiversity faces additional challenges such as the challenges of accessing field sites (e.g. polar, deep sea), knowledge gaps regarding biodiversity trends, high mobility of many organisms in fluid environments, and ecosystem-specific obstacles to stakeholder engagement and governance. This issue comprises contributions from a diverse international group of scientists in a benchmarking volume for a common research agenda on marine conservation. We begin by addressing information gaps on marine biodiversity trends through novel approaches and technologies, then linking such information to ecosystem functioning through a focus on traits. We then leverage the knowledge of these relationships to inform theory aiming at predicting the future composition and functioning of marine communities. Finally, we elucidate the linkages between marine ecosystems and human societies by examining economic, management and governance approaches that contribute to effective marine conservation in practice. This article is part of the theme issue ‘Integrative research perspectives on marine conservation’.
    Repository-Name: EPIC Alfred Wegener Institut
    Materialart: Article , isiRev
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  • 9
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    Unbekannt
    In:  EPIC342 European Marine Biology Symposium (EMBS), 27-31 August, Kiel, Germany.
    Publikationsdatum: 2019-07-16
    Beschreibung: On the high Antarctic shelf, as well as in other marine coastal regions, fish play a central role in the food web as they provide a major trophic link between small sized low trophic level organisms and large vertebrate predators. Marine living communities in the Antarctic are increasingly threatened by alterations of the abiotic and biotic environment due to climate change. The impact of environmental changes on fish not only operates directly, but also indirectly through the food chain. The vulnerability of a particular fish species to such indirect effects and its risk to get lost due to alterations in food web structure are mainly determined by (i) the species plasticity to respond to resource fluctuations, and (ii) predator induced mortality. Species vulnerability decreases with increasing prey diversity (generalist vs. specialist consumers) and decreasing predator diversity. Whether or to which degree fish species loss indirectly affects overall food web structure and ecosystem functioning, depend on the communities or populations capacity for functional compensability (species redundancy), i.e. the degree to which coexisting species can compensate for one another within the food web. Based on data on fish species composition and a large dataset on who eats whom we evaluate the functional role of fish species in the food web of the high Antarctic Weddell Sea shelf, the vulnerability of particular species to food web alterations, and the potential for functional compensability in case of species loss. Fish fauna on the shelf is composed of 50 different fish species, with one plankton feeding species, Pleuragramma antarcticum, distinctly dominating the fish community. Most other fish species inhabiting the Weddell Sea shelf are feeding on benthos or a mixture of benthos and plankton. Vulnerability of species is positively related to the amount of planktonic prey items in the diet, as plankton consumers are mostly specialized on few prey items and are additionally preyed upon by a multitude of higher trophic level predators in the water column. Benthos feeders, in contrast, are generalist consumers with a low number of predators. Vulnerability is consequently low in these species and functional redundancy buffers the effect of eventual species loss. Plankton consumers, mainly represented by P. antarcticum, are highly sensitive to alterations in trophic structure. Due to the lack of functional redundancy within this trophic group, extinction of P. antarcticum might have severe consequences for overall food web structure and ecosystem functioning. On the high Antarctic shelf, P. antarcticum represents a wasp-waist, and thus plays a similar role as sardines and anchovies in tropical upwelling systems.
    Repository-Name: EPIC Alfred Wegener Institut
    Materialart: Conference , notRev
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  • 10
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    In:  EPIC342nd European Marine Biology Symposium, 27-31 August, Kiel, Germany.
    Publikationsdatum: 2019-07-16
    Beschreibung: Ecosystem stability depends to a great extent on food web structure. Recent research indicates that in particular the share of weak links in the web is a crucial feature. Link strength is to some extent related to feeding strategy, i.e. specialists should have stronger links to their prey than generalists. Therefore a closer look at the distribution of feeding strategies among the species representing a system may already provide some hints on link strength distribution.Information on diet and feeding strategy is easily obtained from species who offer a neat view on their stomach content, such as fish. Systems that comprise of animals which are small, ingest lots of ballast together with their food, are much more difficult to handle. Soft-bottom macrozoobenthic communities combine these unfavourable features, and therefore are widely neglected in detailed studies of trophic functioning. We used a stable isotope approach referring to the soft-bottom macrozoobenthic subsystem of the German Bight to tackle this problem. The relation between intra-population range in nitrogen isotopic ratios (δ15N) and feeding strategy was analysed. We hypothesize that the δ15N range is a proxy for trophic niche width and thus (i) is indicative of feeding strategy, i.e. omnivore/generalist, specialist, ontogenetic diet shifter; and (ii) will provide quantitative information on basic trophic differences.
    Repository-Name: EPIC Alfred Wegener Institut
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